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Mechanical Compliance Ce: �.. tbsioN
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2010 Oregon Energy Efficiency Specialty Code „, MAR 2 5 2013
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r r r CITY ol`TJGARD
Section 1: Project Information BUILDING DWISDN
Project Type: New Construction
Project Title: FMC SCHOLLS FERRY
Construction Site: Owner/Agent: Designer/Contractor:
Mark Denyer
MFIA Inc.
2007 SE Ash St
Portland,OR 97214
503-234-0548
•
mark.denyerimtiia-eng.com
Section 2: General Information
Building Location(for weather data): Portland,Oregon
Climate Zone: 4c --
Section 3: Mechanical Systems List
Quantity System Type&Description
t HVAC System 1 (Single Zone):
Heating: 1 each-Central Furnace,Gas,Capacity=200 kBtu/h, Efficiency=81.00%Et
Cooling 1 each-Rooftop Package Unit,Capacity=90 kBtu/h,Efficiency= 12.50 EER,Air-Cooled Condenser,
Air Economizer
1 HVAC System 2(Single Zone)
Heating: 1 each-Central Furnace,Gas,Capacity=80 kBtu/h,Efficiency=81.00%Et
Cooling:1 each-Rooftop Package Unit,Capacity=80 kBtu/h, Efficiency= 15.00 SEER.Air-Cooled Condenser,
Air Economizer
2 Water Heater 1:Gas Storage Water Heater,Capacity: 100 gallons. Input Rating: 150 Btufh w/Circulation Pump,
Efficiency:94.00%Et
Section 4: Requirements Checklist
In the following requirements,the relevant code section reference is shown in(I. '+'denotes that more details exist in the specified code
section.Checkboxes identify requirements that the applicant has not acknowledged as being met. Check marked requirements identify those
the applicant acknowledges are met or excepted from compliance. 'Plans reference page/section'identifies where in the plans/specs the
requirement can be venfied as being satisfied.
Requirements Specific To: HVAC System 1 :
✓ 1- (503 2.3+(Equipment meets minimum efficiency: Central Furnace(Gas): 80.00%Et(or 78%AFUE)
✓ 2. (503.2.3+j Equipment meets minimum efficiency: Rooftop Package Unit: 11.00 EER(11 2 IEER)
✓ 3. (503.2.6+)Energy recovery ventilation systems.Individual fan systems that have both a design supply air capacity of 5.000 cfm or
greater and a minimum outside air supply of 70 percent or greater of the design supply air quantity have an energy recovery system.
Plans reference page/section:
✓ 4. [503.3.1 +j Supply air economizers shall be provided on each coaling system and are capable of providing 100-percent outdoor air,
even if additional mechanical coaling is required to meet the cooling load of the building.Systems provide a means to relieve excess
outdoor air during economizer operation to prevent overpressurizing the building.
Plans reference page/section: MECH PLANS
Requirements Specific To: HVAC System 2:
✓ 1. (503.2-3+1 Equipment meets minimum efficiency: Central Furnace(Gas): 80 00%Et(or 78%AFUE)
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✓ 2. (503.2.3+]Equipment meets minimum efficiency: Rooftop Package Unit: 13.00 SEER _
✓ 3<i5c332.t<+[Energy iecovery veriti"atinn systems-Individual fan systems that have both a design supply air capacity of 5,000 cfrn or f-
_greaterand a minimum outside air siippry of 70 percent or greater of the design supply air quantity have an energy recovery system.
Plans reference page/section:- €11
• ✓ 4. [503.3.1+]Supply air economizers shall be provided on each cooling system and are capable of providing 100-percent outdoor air, i
;ren IC additional m'cti'anical c-tyiliriir required to meet the cooling load of the building. Systems provide a means to relieve excess -
• iutdour ai(durl.ig ecunorriizer operation to prevent overpressurizing the building.
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Flans iererence page/section: _MECH PLANS j
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Requir9.meres S peci`ic To: Water Heater 1 :
✓ 1. [50.2_+]•;1te:vty,pt frhasi;d etittipment meets the efficiency requirements. Gas Storage Water Heater efficiency: 80.00%Et(198 SL,
kBtjfi' ° ' ' ' ; -
✓ 2. [504.2]Service water-heating equipment performance efficiency.Water heating equipment efficiency has been verified through data }I
furnished by the manufacturer or through certification under an approved certification program. 4
`/ 3. [504.3]Temperature controls.Service water-heating equipment have controls to allow a setpoint of 110°F for equipment serving [
dwelling units and 90°F for equipment serving other occupancies.The outlet temperature of lavatories in public facility rest rooms is G
limited to 110°F.
Plans reference page/section: SPECS i
t/ 4. [504.4]Heat traps.Water-heating equipment not supplied with integral heat traps and serving noncirculating systems have heat traps
on the supply and discharge piping associated with the equipment
Plans reference page/section: DETAILS _
✓ 5. [504.5+]Pipe Insulation.For automatic-circulating hot water and externally heated(such as heat trace or impedance heating)systems,
piping is insulated in accordance with the specifications of this section.
✓ 8. [504.8+]Hot Water System Controls.Systems designed to maintain usage temperatures in hot water pipes is turned off automatically f
when the hot water system is not in operation and has demand sensing controls that turn off the system when there is no demand [
when the system is operational.A check valve or similar device is installed per requirement details. r
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Plans reference page/section: DETAILS
Generic Requirements: Must be met by all systems to which the requirement is applicable:
‘ ✓ 1. (503.2.1 +]Calculation of heating and cooling loads Design loads are determined in accordance with the procedures described in the
ASHRAE/ACCA Standard 183.Alternatively,design loads have been determined by an approved equivalent computation procedure. I •
4 V 2. [503.2.1.1 +]Packaged Electric Equipment Specified packaged electrical equipment has a heat pump as the primary heating source. -
Plans reference page/section: -------- i
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✓ 3. (503.2.2+]Equipment and system sizing.Heating and cooling equipment and systems capacity do not exceed the loads calculated in
accordance with Section 503.2.1. i
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Plans reference page/section: i
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✓ 4. [503.2.3+]HVAC Equipment Performance Requirements.Reported efficiencies have been tested and rated in accordance with the
applicable test procedure.The efficiency has been verified through certification under an approved certification program or,if no i
certification program exists,the equipment efficiency ratings are supported by data furnished by the manufacturer.
✓ 5. [5012.4.1 +]Thermostatic Controls.The supply of heating and cooling energy to each zone is controlled by individual thermostatic t
controls that respond to temperature within the zone. i
Plans reference page/section: MECH PLANS i
✓ 6. (503.2.4.1.1]Heat pump supplementary heat.Heat pumps having supplementary electric resistance heat have controls that, except
during defrost,prevent supplementary heat operation when the heat pump can meet the heating toad.
Plans reference page/section:- /
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✓ 7. (503.2.4.2]Set point overlap restriction.Where used to control both heating and cooling,zone thermostatic controls provide a ]
temperature range or deadband of at least 5°F(2.8°C)within which the supply of heating and cooling energy to the zone is capable of
being shut off or reduced to a minimum. 1
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Plans reference page/section: -
t ✓ 8. [503.2.4.3]Optimum Start Controls. Each HVAC system has controls that vary the start-up time of the system to just meet the
temperature set point at time of occupancy.
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Plans reference page/section:
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✓ 9. (503.2.4.4+J Off-hour controls_Each zone is provided with thermostatic setback controls that are controlled by either an automatic time I
clock or programmable control system.
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• Plans reference page/section: t
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✓ 10.(503.2.4,5+]Shutoff damper controls_Both outdoor air supply and exhaust are egOpFed v ith r.Z:lesc.than Class I:motoriz°d tampers. t
r [
Plans reference page/section: I ` r r r : i
v 11.[503.2.4.8+]Freeze Protection and Snow melt system controls. Freeze protection systems,such as heat tracing of outdoor piping and Ij
heat exchangers,including self-regulating heat tracing,include automatic controls capable yf shuttiiiy yff tna system. whscl?utdoor air !#
temperatures meet code criteria_ . I
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Plans reference page/section: 1
✓ 12.[593.2.4.8]Separate air distribution systems.Zones with special process temperature requirements and/or humidity requirements are
served by separate air distribution systems from those serving zones requiring only cunlforfdoitdiliur]s;or shah;gc.tyLi supplementary r
control provisions so that the primary systems may be specifically controlled for comfof,purpuses.oniy.
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Plans reference page/section: `- r r , I
✓ 13.[503.2.4_9]Humidity control.If a system is equipped with a means to add or remove moisture to maintain specific humidity levels in a
zone or zones,a humidity control device is provided.
Plans reference page/section: -- [
✓ 14.(503.2.4-9.1]Humidity control.Where a humidity control device exists it is set to prevent the use of fossil fuel or electncity to produce
relative humidity in excess of 30 percent.Where a humidity control device is used for dehumidification,it is set to prevent the use of
fossil fuel or electricity to reduce relative humidity below 60 percent.
Plans reference page/section:
✓ 15.[503.2-4.9 2]Humidity control.Where a humidity control device exists it is set to maintain a deadband of at least 10%relative humidity
where no active humidification or dehumidification takes place.
Plans reference page/section.
Iv 16,[503.2.5]Ventilation.Ventilation, either natural or mechanical,is provided in accordance with Chapter 4 of the International Mechanical
Code.Where mechanical ventilation is provided,the system has the capability to reduce the outdoor air supply to the minimum .
required by Chapter 4 of the International Mechanical Code.
Plans reference page/section:MttCHAN!CAI PLANS
[
-i v 17.[503.2.5.1 +]Demand controlled ventilation(DCV).DCV is required for spaces larger than 500 ft2 for simple systems and spaces larger >
• than 150 ft2 for multiple zone systems f
Plans reference page/section: - i
6, 18.[503.2.5.2+]Kitchen hoods. Kitchen makeup is provided as required by the Oregon Mechanical Specialty Code. I
Plans reference page/section.
✓ 19.[503.2.5.3+]Enclosed parking garage ventilation controls. In Group S-2,enclosed parking garages used for storing or handling $
automobiles employs automatic carbon monoxide sensing devices. [
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Plans reference page/section:
v 20.(503.2.7+j Duct and plenum insulation and sealing.All supply and return air ducts and plenums are insulated with the specified
insulation.When located within a building envelope assembly,the duct or plenum is separated from the building exterior or
unconditioned or exempt spaces by a minimum of R-8 insulation.All ducts,air handlers and filter boxes are sealed. Joints and seams ]
comply with Section 603.9 of the international Mechanical Code.
[
✓ 21.[503.2.7.1.1 +1 Low-pressure duct systems.All longitudinal and transverse joints,seams and connections of low-pressure supply and I
return ducts are securely fastened and sealed with welds,gaskets,mastics(adhesives).mastic-plus-embedded-fabric systems or ;
tapes installed in accordance with the manufacturer's installation instructions. 1
Plans reference page/section: i i
✓ 22.[503.2.7.1.2+]Medium-pressure duct systems.All ducts and plenums designed to operate medium-pressure are insulated and sealed {
in accordance with Section 503.2.7.Pressure classifications specific to the duct system are clearly indicated on the construction I
documents. r
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Plans reference page/section. (
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✓ 23.[503.2.7.1.3+]High-pressure duct systems.Ducts designed to operate at high-pressure are insulated and sealed in accordance with
iSection 503.2.7.In addition,ducts and plenums are leak-tested in accordance with the SMACNA 1-IVAC Air Duct Leakage Test Manual. I
Plans reference page/section:
• 24.[503.2.9.1 +]Air system balancing. Each supply air outlet and zone terminal device is equipped with means for air balancing in
accordance with the requirements of IMC 603.17.Discharge dampers intended to modulate airflow are prohibited on constant volume
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fans and variable volume fans with motors 10 horsepower.
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Plans reference page/section:__
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I/ 95 x(503.2.9.3'+]Manual r.The const'ucvinr+documents require that an operating and maintenance manual be provided to the building
awner Ly Lie meci rar ical ci,ntracior.See long description for specifications.
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Plans reference page/section:
✓ 2t.`(503.2.?0+]Ai ys;em Design nnc Control. Each HVAC system having a total fan system motor nameplate hp exceeding 5 hp meets
the previsions of Sections 503 2.10 1 !trough 503.2.10.2.
Plans reference page/section: ;
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✓ 27.[503.2.10.1+]Allowable fan floor horsepower.Each HVAC system at fan system design conditions does not exceed the allowable fan i
sy`ter`.t rr-otcr nsrrtsphte-hp('Jptior.1)or fan system bhp(Option 2)as shown and calulated in requirement details. 1
t e r ii
Plans cefcrer.ce:psge:se.aionn__ --_- — [
Iv 28.[503.2.10.2+)Motor nameplate horsepower. For each fan,the selected fan motor is no larger than the first available motor size greater t
than the brake horsepower(bhp).
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Plans reference page/section:
✓ 29.[503.2.10.3.1]Large Volume Fan Systems.Fan systems over 8,000(7 m3/s)cfm without direct expansion cooling coils that serve
single zones reduce airflow based on space thermostat heating and cooling demand.A two-speed motor or variable frequency drive
reduces airflow to a maximum 60 percent of peak airflow or minimum ventilation air requirement as required by Chapter 4 of the
International Mechanical Code,whichever is greater.
Plans reference page/section:
✓ 30.[503.2.10.3.2 +]All air-conditioning equipment and air-handling units with direct expansion cooling and a cooling capacity at ARI
conditions greater than or equal to 110.000 8tu/h that serve single zones have their supply fan operation controlled according to code
specific requirements.
Plans reference page/section: --.---
✓ 31.[503.2.10.4]Series fan-powered terminal unit fan motors.Fan motors for series fan-powered terminal units are i
electronically-commutated motors and have a minimum motor efficiency of 70 percent when rated in accordance with NEMA Standard (
MG 1-2006 at full toad rating conditions. [
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Plans reference page/section: I
✓ 32.1503.2.12]Hot Gas Bypass Limitation.For coofing systems<=240 kBtu/h, maximum hot gas bypass capacity is no more than 50% I
total cooling capacity.
Plans reference page/section: i
✓ 33.All service water heating requirements are listed in requirements section specific to the system. r 1 .
Section 5: Compliance Statement 1
Compliance Statement. The proposed mechanical design represented in this document is consistent with the building plans,specifications l
and other calculations submitted with this permit application.The proposed mechanical systems have been designed to meet the 2010
Oregon Energy Efficiency Specialty Code requirements in COMCheck Version 3.9.1 and to comply with the mandatory requirements in the i
Requirements Checklist.
(2,--1.4...` )'z_____` 1-2-13
Mark Denver-Mechanical Engineer I
Name-Title Signature Date
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Section 6: Post Construction Compliance Statement
O HVAC record drawings of the actual installation,system capacities,calibration information, and performance data for each equipment i
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provided to the owner_ z
o HVAC O&M documents for all mechanical equipment and system provided to the owner by the mechanical contractor. 3
is, ci Written HVAC balancing and operations report provided to the owner. t
The above post construction requirements have been completed. - F
Principal Mechanical Designer-Name Signature Date L
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COMcheck Software Version 3°9..f - - ; 1
. -t Mechanical Requirements 1(
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Description
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2010 Oregon Energy Efficiency Specialty Code r Cr! r r
The following list provides more detailed descriptions of the requirements in Section'4 of tae A1echerlcal•Cotnplience
I
Certificate. `` • t
Requirements Specific To: HVAC System 1 : i
1. (503.2.31 The specified heating and/or cooling equipment must meet the following minimum efficiency: Central Furnace(Gas): 80.00 I
%Et(or 78%AFUE)
2. [503.2.3)The specified heating and/or cooling equipment must meet the following minimum efficiency: Rooftop Package Unit: 11.00 1
EER(11.2 LEER) i
3. (503.2.8]Energy recovery ventilation systems. Individual fan systems that have both a design supply air capacity of 5,000 cfm(2.36 s
m3/s)or greater and a minimum outside air supply of 70 percent or greater of the design supply air quantity shall have an energy l..
recovery system that provides a change in the enthalpy of the outdoor air supply of 50 percent or more of the difference between the
outdoor air and return air at design conditions.Provision shall be made to bypass or control the energy recovery system to permit
cooling with outdoor air where cooling with outdoor air is required.Where a single room or space is supplied by multiple units,the
aggregate supply(cfm)of those units shall be used in applying this requirement.
Exception(s):
- Where energy recovery systems are prohibited by the International Mechanical Code.
- Systems serving spaces that are not cooled and are heated to lass than 80°F(15.5°C).
- Where more than 80 percent of the outdoor heating energy is provided from site-recovered or site solar energy.
- Type 1 kitchen exhaust hoods.
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- Cooling systems in climates with a 1-percent cooling design wet-bulb temperature less than 64F(18C). f
-e - Systems requiring dehumidification that employ series-style energy recovery coils wrapped around the cooling coil when the
evaporative coil is located upstream of the exhaust air stream.
- Systems exhausting toxic,flammable,paint exhaust,corrosive fumes,or dust. i
Laboratory fume hood systems that include at feast one of the following features:
1)Variable-air-volume hood exhaust and room supply systems that reduce exhaust and makeup air volume to 50 percent or less f
of design values during periods of reduced occupancy or system demand
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Of f
2)Variable-air-volume hood exhaust and room supply systems that reduce exhaust and makeup air volume and/or incorporate a t
heat recovery system to precondition makeup air from laboratory exhaust shall meet the following: i
A+8°(EIM)=50%
Where: f
A=Percentage that the exhaust and makeup air flow rates will be reduced from design conditions.
8=Percentage sensible heat recovery effectiveness.
E=Exhaust airflow rate through the heat recovery device at design conditions i
M=Makeup air flow rate of the system at design conditions, I
or i
3)Direct makeup(auxiliary)air supply equal to at least 75 percent of the exhaust rate,heated no warmer than 2°F(1.1°C)below i
room setpaint,cooled to no cooler than 3°F(1.7°C)above room setpoint•no humidification added,and no simultaneous heating and
cooling used for dehumidification control. i
4. (503.3.1J Supply air economizers shall be provided on each cooling system and shall be capable of providing 100-percent outdoor air,
even if additional mechanical cooling is required to meet the cooling load of the building.Systems shall provide a means to relieve i
excess outdoor air during economizer operation to prevent overpressurizing the building.The relief air outlet shall be located to avoid
recirculation into the building.Where a single room or space is supplied by multiple air systems,the aggregate capacity of those I
systems shall be used in applying this requirement
Exception(s):
- l - Cooling equipment less than 54,000 Situ/hr.(15,827 W)total cooling capacity. I
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\ Requirements Specific To: HVAC System 2 :
- 1. (503.2.3]The specified heating and/or cooling equipment must meet the following minimum efficiency: Central Furnace(Gas): 80.00 7-
a
%Et(or 78%AFUE) r
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2. (503 2.3]The specified heating and/or cooling equipment must meet the following minimum efficiency: Rooftop Package Unit 13.00 E
r SER-. ; . t '
... .503.2.6]Energy recovery ventilation systems.Individual fan systems that have both a design supply air capacity of 5,000 cfm(2.36
`mars)or greater and a minimum euteid•air supply of 70 percent or greater of the design supply air quantity shall have an energy
recovery system that provides a change in the enthalpy of the outdoor air supply of 50 percent or more of the difference between the t
outdoor air and return air at design conditions.Provision shall be made to bypass or control the energy recovery system to permit
. cooling with ou'r oo=air where cooling with outdoor air is required.Where a single room or space is supplied by multiple units, the -
- `aggregate supply(rim)of thorn units:hall be used in applying this requirement.
. Fuceeeen(s): . 'r
- Where energy recovery systems are prohibited by the International Mechanical Coda.
- Systems serving spaces that are net cooled and are heated to less than 60°F(15.5°C). 1
- 4Jheremere,,ha't 60 percent of the outdoor heating energy is provided from site-recovered or site solar energy.
r £B i 6<L
- Fypt e 1,-kit r hen exhjutt hoods.
- Cooling systems in climates with a 1-percent cooling design wet-bulb temperature less than 64F(18C).
- Systems requiring dehumidification that employ series-style energy recovery coils wrapped around the cooling coil when the
i
evaporative coil is located upstream of the exhaust air stream. 1
- Systems exhausting toxic,flammable,paint exhaust,corrosive fumes,or dust.
[
- Laboratory fume hood systems that include at least one of the following features: f
1)Variable-air-volume hood exhaust and room supply systems that reduce exhaust and makeup air volume to 50 percent or less
of design values during periods of reduced occupancy or system demand
or
2)Variable-air-volume hood exhaust and room supply systems that reduce exhaust and makeup air volume and/or incorporate a
heat recovery system to precondition makeup air from laboratory exhaust shall meet the following:
A+B°(E/M)=50%
Where:
A=Percentage that the exhaust and makeup air flow rates will be reduced from design conditions.
B=Percentage sensible heat recovery effectiveness. a_
E=Exhaust airflow rate through the heat recovery device at design conditions j-
M=Makeup air flow rate of the system at design conditions, €
or f
3)Direct makeup(auxiliary)air supply equal to at feast 75 percent of the exhaust rate,heated no warmer than 2°F(1.1°C)below
room setpoint,cooled to no cooler than 3°F(1.7°C)above room setpoint,no humidification added,and no simultaneous heating and €
cooling used for dehumidification control
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Ai4. (503.3.1]Supply air economizers shall be provided on each cooling system and shall be capable of providing 100-percent outdoor air, t
even if additional mechanical cooling is required to meet the cooling load of the building.Systems shall provide a means to relieve
excess outdoor air during economizer operation to prevent overpressurizing the building. The relief air outlet shall be located to avoid i
recirculation into the building.Where a single room or space is supplied by multiple air systems,the aggregate capacity of those
systems shall be used in applying this requirement.
Exception(s):
f
- Cooling equipment less than 54,000 Btu/hr.(15,827 W)total cooling capacity. i
t
Requirements Specific To: Water Heater 1 :
1. (504.2)Service water heating equipment meets minimum efficiency requirements. Gas Storage Water Heater efficiency: 80.00%Et i
(198 SL,kBtu/h) [
2. (504.2]Service water-heating equipment performance efficiency.Water heating equipment efficiency shall be verified through data
furnished by the manufacturer or through certification under an approved certification program.
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3 (504.3]Temperature controls.Service water-heating equipment shall be provided with controls to allow a setpoint of 110°F(43°C)for i
equipment serving dwelling units and 90°F(32°C)for equipment serving other occupancies.The outlet temperature of lavatories in
public facility rest rooms shall be limited to 110°F(43°C). I
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4. (504.4]Heat traps.Water-heating equipment not supplied with integral heat traps and serving noncirculating systems shall be provided f
with heat traps on the supply and discharge piping associated with the equipment. I ttt
5. (504.5)Pipe Insulation.For automatic-circulating hot water and externally heated(such as heat trace or impedance heating)systems,
piping shall be insulated with 1 inch(25 mm)of insulation having a conductivity not exceeding 0.27 Btu per inch/h ft2 x°F(1.53 W per i
• 25 mm/m2 x K).The first 8 feet(2438 mm)of piping in noncirculating systems served by equipment without integral heat traps shall be
insulated with 0.5 inch(12.7 mm)of material having a conductivity not exceeding 0 27 Btu per inch/h x ft2 x'F(1.53 W per25 mm/m2
i x K).
6. [504.8]Hot Water System Controls.Systems designed to maintain usage temperatures in hot water pipes such as hot water
+
recirculating systems or heat trace,shall be tumed off automatically when the hot water system is not in operational and shall have
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° demand sensing controls(flow switch in cold water make-up pipe,return water aquastat temperature sensor)that turn off the system
when there is no demand when the system is operational.A check valve or similar device ehall he loc-hted beremen the i'irclitstor pump
and the water heating equipment to prevent water from flowing backwards though the reerculafoilocp.
Exception(s):
Where public health standards require 24 hours per day operation of pumps for uses such as swimming pools,spas and hospitals.
- Service water heating systems used to provide multiple functions(e.g.,space heating and DHW)as part of an integrated system.
- Where coupled with water heating capacity less than 100 k8tu/h(29 kW). - ]
Generic Requirements: Must be met by all systems to which the requirement�s:ap]^licabie.
• 1. (503.2.1]Calculation of heating and cooling loads. Design loads shall be determined in accordance with(tie procedures described in
the ASHRAE/ACCA Standard 183. Heating and cooling loath shall be adjusted to account for load reductions that are achieved when
energy recovery systems are utilized in the HVAC system in accordance with the ASHR 4E 'cc Systems ant Equii rtent Handbook.
Alternatively,design toads shall be determined by an approved equivalent computation,eroceture.
2. (503.2.1.1]Packaged Electric Equipment.Forced air unit or packaged electric equipment with a total heating capacity greater than
20,000 Btufh has a heat pump as the primary heating source.
Exception(s):
- Unstaffed equipment shelters or cabinets used solely for personal wireless service facilities.
- Requirement is not applicable.
3. (503.2.2]Equipment and system sizing.Heating and cooling equipment and systems capacity shall not exceed the loads calculated
in accordance with Section 503.2.1.A single piece of equipment rovidin g bath heating and cooling must satisfy!this provision for one - I
function with the capacity for the other function as small as possible,within available equipment options.
Exception(s):
Required standby equipment and systems provided with controls and devices that allow such systems or equipment to operate
automatically only when the primary equipment is not operating.
- Multiple units of the same equipment type with combined capacities exceeding the design load and provided with controls that have f
the capability to sequence the operation of each unit based on load. tt--
4_ (503.2.3J HVAC Equipment Performance Requirements. Reported efficiencies must be tested and rated in accordance with the
applicable test procedure.The efficiency shall be verified through certification under an approved certification program or.if no
certification program exists,the equipment efficiency ratings shall be supported by data furnished by the manufacturer.Where multiple
rating conditions or performance requirements are provided,the equipment shall satisfy all stated requirements.Where components,
such as indoor or outdoor coils,from different manufacturers are used,calculations and supporting data shall be furnished by the
designer that demonstrates that the combined efficiency of the specified components meets the requirements herein.
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5. (503.2.4.1]Thermostatic Controls.The supply of heating and cooling energy to each zone shall be controlled by individual thermostatic
controls that respond to temperature within the zone. -=
S. (503.2.4.1.1]Heat pump supplementary heat Heat pumps having supplementary electric resistance heat shall have controls that,
except during defrost,prevent supplementary heat operation when the heat pump can meet the heating load.
7. (503.2.4.2]Set point overlap restriction.Where used to control both heating and cooling,zone thermostatic controls shall provide a
temperature range or deadband of at least 5°F(2.8°C)within which the supply of heating and cooling energy to the zone is capable of
being shut off or reduced to a minimum_
Exception(s)'
}
- Thermostats requiring manual change over between heating and cooling modes.
8. (503.2.4.3J Optimum Start Controls.Each HVAC system shall have controls that vary the start-up time of the system to just meet the
temperature set point at time of occupancy.
9. (503.2.4.4]Off-hour controls. Each zone shalt be provided with thermostatic setback controls that are controlled by either an automatic
time clock or programmable control system_Thermostatic setback controls shall have the capability to set back or temporarily operate
the system to maintain zone temperatures down to 55°F(13°C)or up to 85°F(29°C).Automatic time clock or programmable controls (,
shall be capable of starting and stopping the system for seven different daily schedules per week and retaining their programming and
time setting during a loss of power for at least 10 hours.Additionally,the controls shaft have a manual override that allows temporary
Operation of the system for up to 2 hours;a manually operated timer capable of being adjusted to operate the system for up to 2 hours;
or an occupancy sensor.
Exception(s):
- Zones that will be operated continuously.
- Zones with a full HVAC load demand not exceeding 6,800 drum(2 kW)and having a readily accessible manual shutoff switch_
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10-.^';5e3-2.:_53-St:utoff+a mper'zoekt.s..8oth outdoor air supply and exhaust shall be equipped with not less than Class I motorized ' ...
eampeis with a maximum leakage rote ttf 4 cfm per square foot(6.8 Lis-C m2)at 1.0 inch water gauge(w.g.)(1250 Pa)when tested
;n acco.da,ice wilt.Ai4CA&COD,Ina.wi.l automatically shut when the systems or spaces served are not in use.
Exception(s):
Gravity dampers shall be permitted for outside air intake or exhaust airflows of 300 cfm(0.14 m3/s)or less.
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11.r (503 2.4.8€Fre[Ze Erotection End eno.v melt system controls.Freeze protection systems,such as heat tracing of outdoor piping and i
1eat:aechanger3 including sU.i.sgutating heat tracing,shall include automatic controls capable of shutting off the systems when i
outdoor air temperatures are above 40F or when the conditions of the protected fluid will prevent freezing.Snow-and ice-melting }i
systems,supplied through energy service to the building,shall include automatic controls capable of shutting off the system when the
pareir.en:te.np_r tur_i s abcee 501e(10C)and no precipitation is falling and an automatic or manual control that will allow shutoff when t
the ou.doo:;arree..ater_,s at.ove 43F(4C)so that the potential for snow or ice accumulation is negligible.
12. [503.2.4.8]Separate air distribution systems.Zones with special process temperature requirements and/or humidity requirements ]
shall be served by separate air distribution systems from those serving zones requiring only comfort conditions;or shall include
supplementary control provisions so that the primary systems may be specifically controlled for comfort purposes only.
Exception(s): i
- Zones requiring only comfort heating or comfort cooling that are served by a system primarily used for process temperature and E
humidity control provided that:
1)The total supply air to those comfort zones is no more than 25 percent of the total system supply air, )
or ...
2)The total conditioned floor area of the zones is less than 1,000 square feet(90 m2)
13. [503.2.4.9]Humidity control.If a system is equipped with a means to add or remove moisture to maintain specific humidity levels in a
zone or zones,a humidity control device shall be provided.
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14. (503.2.4.9.1]Humidity control.Where a humidity control device exists it shall be set to prevent the use of fossil fuel or electricity to 1
produce relative humidity in excess of 30 percent.Where a humidity control device is used for dehumidification,it shall be set to
prevent the use of fossil fuel or electricity to reduce relative humidity below 60 percent.
Exception(s):
I
- Hospitals,process needs,archives,museums,critical equipment, and other non-comfort situations with specific humidity
requirements outside this range. ;
e t
15. (503.2.4.9.2]Humidity control.Where a humidity control device exists it shall be set to maintain a deadband of at least 10%relative
. humidity where no active humidification or dehumidification takes place. q
Exception(s): _ i
- Healing for dehumidification is provided with heat recovery or heat pumping and the mechanical cooling system efficiency is 10 )
percent higher than required in section 503.2.3,HVAC equipment performance requirements.
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16. [503.2.5]Ventilation.Ventilation, either natural or mechanical,shall be provided in accordance with Chapter 4 of the International
■
Mechanical Code. Where mechanical ventilation is provided,the system shall provide the capability to reduce the outdoor air supply to
the minimum required by Chapter 4 of the International Mechanical Code. i
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17. (503.2.5.1]Demand controlled ventilation(DCV).DCV is required for spaces larger than 500 ft2 for simple systems and spaces j
larger than 150 ft2 for multiple zone systems and with an average occupant load of 25 people or more per 1000 ft2 of floor area(as
established in Table 403.3 of the intemational Mechanical Code)and served by systems with one or more of the following: ]
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1.An air-side economizer; (
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2.Automatic modulating control of the outdoor air damper,or i
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3.A design outdoor airflow greater than 3,000 cfm. I
Exception(s): ]
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- Systems with energy recovery complying with Section 503-2.6 t
- Spaces less than 750 ft2(69.7 m2)where an occupancy sensor turns the fan off,closes the ventilation damper,or closes the zone 1
damper when the space is unoccupied.
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18. (503.2.5.2]Kitchen hoods.Kitchen makeup air shall be provided as required by the Oregon Mechanical Specialty Code. For each t.
kitchen with a total exhaust capacity greater than 5.000 cfm(2360 LIs), 50 percent of the required makeup air shall be(a)unheated or
• heated to no more than 60°F(15.55°C);and(b)uncooled or evaporatively cooled Each kitchen with a total exhaust capacity greater
than 5,000 cfm shall be equipped with a demand ventilation system on at least 75 percent of the exhaust and makeup air. Such i
. systems shall be equipped with automatic controls that reduce airflow in response to cooking appliance operation ]
1 Exception(s): I
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- Where hoods are used to exhaust ventilation air that would otherwise be exhausted by other fan systems.Air transferred from
spaces served by other fan systems may not be used if those systems are required to meet either Sections 503.2.5-1 or 503.2.6.
Occupancy schedule of HVAC system supplying transfer air shall be similar to kitchen exhaust hood operating schedule.
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- Kitchen exhaust systems that include exhaust air energy recovery complying with section 503.2.6.
19. [503.2.5.33 Enctosed parking garage ventilation controls. In Group 5-2, enclosed par'drt;garages uaeci to(StLniny or.haadlin.g
automobiles operating under their own power having ventilation exhaust rates 30,066 i-fm and g,eater.'s.aall empiey automa.ic..arbon
monoxide sensing devices.These devices shall modulate the ventilation system to maintain a maximum'average i-oncenlraciun of
carbon monoxide of 50 parts per million during any 8-hour period,with a maximum concentration not greater than 200 parts per million
for a period not exceeding 1 hour.The system shall be capable of producing a ventilation rate of 1.5 cfm per square foot( 0276 m3/s-
m2)of floor area.Failure of such devices shall cause the exhaust fans to operate in Inc.3N position.
20. [503.2.7)Duct and plenum insulation and sealing.All supply and return air ducts and plenums shall be insulated with a minimum of R-5
insulation when located in unconditioned spaces and a minimum of R-8 insulation when located outside the building.When located
within a building envelope assembly,the duct or plenum shall be separated from the b•ri'd'ne exterior or urconr+i+ioned or exempt
spaces by a minimum of R-8 insulation.All ducts,air handlers and filter boxes shall be sealed. Joirts ann seams ena r comply with
Section 603.9 of the International Mechanical Code.
Exception(s):
- When located within equipment.
- When the design temperature difference between the interior and exterior of the duct or plenum does not exceed 15°F(8°C).
21. (503.2.7.1.1)Low-pressure duct systems.All longitudinal and transverse joints,seams and connections of supply and return ducts
operating at a static pressure less than or equal to 2 inches w.g.(500 Pa)shall be securely fastened and sealed with welds,gaskets,
mastics(adhesives),mastic-plus-embedded-fabric systems or tapes installed in accordance with the manufacturer's installation ;
instructions. Pressure classifications specific to the duct system shalt be clearly indicated on the construction documents in accordance #.
with the International Mechanical Code.Documentation shall be furnished by the designer demonstrating that representative sections
totaling at least 25 percent of the duct area have been tested and that all tested sections meet the requirements of this section.
Exception(s):
- Continuous! welded and locking-type longitudinal joints and seams on ducts operating at static pressures less than 2 inches w.g. F-
Y 9-h'P 9 joints F 9 P t
(500 Pa)pressure classification.
22_ [503.2.7.1.2)Medium-pressure duct systems.All ducts and plenums designed to operate at a static pressure greater than 2 inches
w.g.(500 Pa)but less than 3 inches w.g.(750 Pa)shall be insulated and sealed in accordance with Section 503.2.7.Pressure
classifications specific to the duct system shall be clearly indicated on the construction documents in accordance with the International
Mechanical Code.Documentation shall be furnished by the designer demonstrating that representative sections totaling at least 25
percent of the duct area have been tested and that all tested sections meet the requirements of this section.
23. [503.2.7.1.3)High-pressure duct systems. Ducts designed to operate at static pressures in excess of 3 inches w.g. (748 Pa)shall be
insulated and sealed in accordance with Section 503.2.7.In addition,ducts and plenums shall be leak-tested in accordance with the
- SMACNA HVAC Air Duct Leakage Test Manual with the rate of air leakage(CL)less than or equal to 6.0 as determined in accordance
with Equation 5-2. Documentation shall be furnished by the designer demonstrating that representative sections totaling at least 25
f
percent of the duct area have been tested and that all tested sections meet the requirements of this section. i
CL=F x P"(0.65)(Equation 5-2)
t
where: 1
t
F=The measured leakage rate in cfm per 100 square feet of duct surface.
P=The static pressure of the test. 1
24. [503.2.9.1]Air system balancing.Each supply air outlet and zone terminal device shall be equipped with means for air balancing in
accordance with the requirements of Chapter 6 of the International Mechanical Code(IMC 603.17).Discharge dampers intended to
modulate airflow are prohibited on constant volume fans and variable volume fans with motors 10 horsepower(hp)(7.5 kW)and larger.
25. [503.2.9.31 Manuals. The construction documents shalt require that an operating and maintenance manual be provided to the building
owner by the mechanical contractor. the manual shall include,at least,the following:
1. Equipment capacity(input and output)and required maintenance actions.
2. Equipment operation and maintenance manuals.
3. HVAC system control maintenance and calibration information,including wiring diagrams,schematics,and control sequence
descriptions.Desired or field-determined setpoints shall be permanently recorded on control drawings,at control devices or,for digital
control systems,in programming comments.
4.A complete written narrative of how each system is intended to operate.
26. [503.2.10)Air System Design and Control.Each HVAC system having a total fan system motor nameplate horsepower(hp)exceeding tE
5 horsepower(hp)(3.7 kw)shall meet the provisions of Sections 503.2.10.1 through 503.2.10.2.
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27. [503.2.10.1 j Allowable fan floor horsepower. Each HVAC system at fan system design conditions shall not exceed the allowable fan
system motor nameplate hp(Option 1)or fan system bhp(Option 2)as shown in Table 503.2.10.1(1).This includes supply fans,return/
relief fans,and fan-powered terminal units associated with systems providing heating or cooling capability.
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Table S03.2.10.1(1) •
an Foyer.ymitstion LIMIT CONSTANT VOLUME VARIABLE VOLUME'
Optwn Fan systi m rii(:tor r4neora.e hp Allowable nameplate motor hp hp<CFMS'0.0011 hp<CFMS`0.0015
r r Opticn Fan s'vstm bhti Allowable fan system bhp bhp<CFMS'0.00094 •A bhp<CFMS'0.0013 4'
A
�'rfrere
CFMS=The maxirnumrdesi7n vim),airflow rate to conditioned spaces served by the system in cubic feet per minute.
• hp The rraxi• urr,combired motor nameplate horsepower.
Bhp=The maximum combined fan brake horsepower.
A=Sum of[PD xCFMD/4131J.
wi re: rr f [ff. re-(
=;Each,.ahpP. ele p'essur`9 drop adjustment from Table 503.2 10 1(2)in.w.c.
•
Table 503.2.10.1(2)
Fan Power Limitation Pressure Drop Adjustment Credits:
Fully ducted return and/or exhaust air systems=0.5 in w.c.
Return and/or exhaust airflow control devices=0.5 in w.c
Exhaust filters,scrubbers or other exhaust treatment=pressure drop of device calculated at fan system design condition.
Particulate filtration credit:MERV 9 thru 12=0 5 in w.c.
Particulate filtration credit:MERV 13 thru 15=0.9 in w.c.
filtration credit:MERV 16 and greater and electronically
Enhanced filters=Pressure drop calculated at 2x clean filter pressure drop at fan system design condition.
Carbon and other gas-phase air cleaners=Clean filter pressure drop at fan system design condition. -
Heat recovery device=Pressure drop of device at fan system design condition.
Evaporative humidifier/cooler in series with another cooling coil=Pressure drop of device at fan system design conditions
Sound attenuation section=0.15 in w.c.
Exhaust system serving fume hoods=0.35 in.w.c.
Laboratory and vivarium exhaust systems in high-rise buildings=0.25 in w.c./100 ft of vertical duct exceeding 75 feet
Exception(s):
[
- Hospital and laboratory systems that utilize flaw control devices on exhaust and/or return to maintain space pressure relationships
necessary for occupant health and safety or environmental control shall be permitted to use variable volume fan power limitation.
- Individual exhaust fans with motor nameplate horsepower of 1 hp(0.7 kW)or less.
28. [503.2.10.2)Motor nameplate horsepower. For each fan,the selected fan motor shall be no larger than the first available motor size
greater than the brake horsepower(bhp). The fan brake horsepower(bhp)shall be indicated on the design documents to allow for
compliance verification by the code official. ;=
Exception(s):
- For fans less than 6 bhp,where the first available motor larger than the brake horsepower has a nameplate rating within 50 percent
of the bhp,selection of the next larger nameplate motor size is allowed.
- For fans 6 bhp and larger,where the first available motor larger than the bhp has a nameplate rating within 30 percent of the bhp,
selection of the next larger nameplate motor size is allowed.
29. [503.2.10.3.1j Large Volume Fan Systems.Fan systems over 8,000(7 mils)cfm without direct expansion cooling coils that serve
single zones are required to reduce airflow based on space thermostat heating and cooling demand.A two-speed motor or variable
frequency drive shall reduce airflow to a maximum 60 percent of peak airflow or minimum ventilation air requirement as required by
Chapter 4 of the International Mechanical Code,whichever is greater.
Exception(s)
• Systems where the function of the supply air is for purposes other than temperature control,such as maintaining specific humidity
levels or supplying an exhaust system
30. [503.2.10.3.21 All air-conditioning equipment and air-handling units•with direct expansion cooling and a cooling capacity at ARI
conditions greater than or equal to 110,000 8tulh that serve single zones shall have their supply fans controlled by two-speed motors
or variable speed drives.At cooling demands less than or equal to 50 percent,the supply fan controls shall be able to reduce the
• (
airflow to no greater than the larger of the following'
1 Two-thirds of the full fan speed,or
2.The volume of outdoor air required to meet the ventilation requirements of ANSI/ASHRAE Standard 82.1-2007.
Exception(s):
3
- Systems where the function of the supply air is for purposes other than temperature control.such as maintaining specific humidity
levels or supplying an exhaust system j
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31. (503.2.10.4]Series fan-powered terminal unit fan motors.Fan motors for series fan-powered terminal units shall be
electronically-commutated motors and have a minimum motor efficiency of 70 percer.:wtt:Y.rand in a. ordar:e•Nir'1 NFMA Standard `r
MG 1-2006 at full load rating conditions. -
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32. [503.2.12]Hot Gas Bypass Limitation.For cooling systems<=7240 kBtu/h,maximum hot gas bypass capacity must be no more than
50%total cooling capacity.
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33. All service water heating requirements are listed in requirements section specific to the syste.r..
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