Report !DEctron General Specification
Part 1 - General V ;
1. Scope
Split system designed for natatorium environment control including: A (f 16 2018
A. Dehumidification
TIGARD
B. Cooling mode with heat rejection to a remote outdoor air cooled condenser CUi OF'
C. Pool water heating from reclaimed compressor waste heat BUILDING D g riSION
D. Unit mounted minimum Outdoor Air Connection
2. Quality and Safety Assurance
A. The unit shall be ETL listed.
B. Unit shall be completely factory assembled,wired,piped,and test run prior to shipping. All controls shall be factory
adjusted and preset to the design conditions.A factory test report shall be available upon request.
C. Live remote monitoring of the unit during factory testing shall be available via the Internet.
D. The unit shall have a mechanical vestibule where the electrical panel,compressors,pool water heat exchangers,receivers
and most of the refrigeration controls are out of the process air stream.
E. Warranty:The entire system shall have a 24 month limited parts warranty from ship date.
1. The system shall be covered by an additional 1-year labour warranty when it is connected to the factory via live internet
monitoring system from date of initial start-up.
2. The compressor(s)shall have a 5 year warranty from ship date.
F. The unit shall have live remote service capability via the internet with the ability for field service technicians to receive
service and trouble alerts via email and make adjustments via smart-phone application remote control.
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DEctrond General Specification
Part 2 -Product
3. General
The natatorium control system shall include:
A. Mechanical process dehumidification
B. Indoor configuration
C. Split system with remote outdoor air-cooled condenser for AC heat rejection.
D. Pool water heating type:coaxial
E. Air filtration type:MERV 8 2-inch filters for return and outdoor air.
F. Minimum Outdoor Air connection.
G. Unit shall have a service vestibule where the compressor,refrigeration specialties and control valves and all electronics are
outside of process air stream.
4. Sequence of Operation
Unit shall be designed and sized to maintain the specified conditions.The unit operation shall be as follows:
A. Unit Startup
1. Power is turned on or system is restarted.
2. After a short initial delay to allow sensors to stabilize,the blower starts and operates continuously.
3. Based on unit mounted sensor feedback the unit shall begin/resume operation and will operate based on the sequence
described below.
B. Airside Configuration
1. The unit delivers specified supply air continuously to the Natatorium.
2. The minimum exhaust air volume is set to meet the engineer's schedule.
3. The minimum outdoor air volume is set to meet the engineer's schedule.
C. Dehumidification Mode
1. Return air relative humidity is above humidity setpoint.
2. Compressor starts using Compressor Start sequence.
3. Initially all compressor hot gas will be diverted to condense at the reheat coil.The supply air temperature is warmer
than the return air temperature.
D. Air Conditioning Mode
1. Return air temperature is above room temperature setpoint.
2. Compressor starts if not already operating in dehumidification mode.
3. Unneeded compressor hot gas is diverted to the outdoor air cooled condenser for up to 100%heat rejection at summer
design ambient conditions.
E. Space Heating Mode
1. Return air temperature is below room temperature setpoint.
2. The Microprocessor space heating output signal is sent to the heating coil controller.
3. The Microprocessor space heating output signal(0-10 volt)is sent to the heating coil controller.The signal output will
regulate based on the return air temperature.
F. Pool Water Heating Mode
1. Return pool water temperature is below pool water setpoint.
2. If compressor is already operating from a Dehumidification or Air Conditioning demand,the control valves divert the
compressor hot gas through the coaxial heat exchanger/pool water heater and the rest of the compressor heat is
rejected at either the reheat coil or the AC heat exchanger.
3. If there is no pre-existing demand for the compressor to operate,the microprocessor sends a signal to the auxiliary
GeneralSpec 25257.1 Apr 3,2018 Page 2 of 7
DEctron General Specification
pool water heater(remote by others)to operate.The compressor will not normally operate solely for a pool water
heating demand unless configured to do so at the controller.
G. Freeze Protection
1. Supply air temperature falls below freezestat setpoint or optional freezestat sensor indicates a freezestat condition.
2. All exhaust fans are stopped and all outdoor air dampers are fully closed.
3. Freezestat alarm is tripped.Alarm has to be manually cleared by operator.
5. Cabinet
A. The unit shall be designed for indoor application.
B. Cabinet Construction:All cabinet 16,20,24 gauge sheet metal shall be galvanized G90 steel or GalvalumeTM alloy,mill
applied zinc phosphate primer followed by an exterior grade white silicone modified polyester top coat. The sheet metal is
engineered to form a cabinet with maximum strength and rigidity.Panels shall be fastened to the frame with stainless steel
hardware.Panels shall be isolated from the steel frame with dielectric gaskets to prevent galvanic corrosion.All seams shall
be caulked with silicone inside and out to prevent air and water leakage.
1. The cabinet walls shall be 20 gauge pre-painted steel,single-wall construction with 1-inch fiberglass insulation with
anti-microbial top coat.
2. The cabinet floor shall be 20-gauge pre-painted steel,2-inch double wall engineered with structural bending for
maximum rigidity and be mechanically fastened to the base frame of the unit.
3. The cabinet roof shall be engineered with structural bending for maximum rigidity with 20-gauge steel and shall be
mechanically fastened to the walls of the unit.
4. The cabinets shall be mechanically assembled with stainless steel 5/32"sealed pop rivets. Where bolts are required
bright zinc plated bolts shall be used.
5. Access doors shall be removable,secured to cabinet using heavy-duty stainless steel hex-head bolts with stainless
steel washers insulated with rubber gaskets.
C. Outdoor Air Intake:
1. Minimum Outdoor Air connection:motorized damper,filter and time clock
D. Insulation:The unit shall be insulated per the following standards:
1. One inch thick,surface coated with an anti-microbial layer,protected against perforation and fiber air entrainment with a
reinforcing mesh.
2. Fire resistant rating to conform to NFPA Standard 90A and 90B.
3. Sound attenuation coefficient shall not be less than 1.00 at a frequency of 1,000 Hz as per ASTM Standard C423.
4. Thermal conductivity shall not exceed 0.23 Btu/in-h-sqft-F at 75 F.
E. Cabinet configuration shall include:
1. A filter rack with separate access doors shall be provided for the return air and minimum outdoor air streams.
2. Unit shall be equipped with duct collars to admit the minimum outdoor air as scheduled.The outdoor air intake
assembly shall have a built in air filter rack with separate access door,manual air balancing device and motorized 2
position extruded aluminum,Insulated,silicone side-sealed damper operated by 24-hour time clock.
3. Mechanical vestibule:The unit shall have the compressor,receiver,solenoid valves and the electrical panel in a
separate compartment out of the processed air stream.All components shall be serviceable while the unit is in
operation without disturbing the airflow.
4. Electrical panel:The unit shall have a built-in electrical control panel in a separate compartment in order not to disturb
the airflow within the dehumidifier during electrical servicing. All electrical components shall be mounted on a 16 gauge
galvanized sub-panel.
6. Filters
Filters shall be standard sized,replaceable,off-the-shelf filters used throughout including:
A. Return Air:2-Inch MERV 8,30%pleated filters with rust-free non-metallic structure on a face loading rack.
B. Outside Air:2-Inch MERV 8,30%pleated filters with rust-free non-metallic structure
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%DEctran General Specification
7. Coils
A. Evaporator/dehumidifier coils shall be designed for maximum moisture removal capacity.
1. Coils shall be fully dipped and coated with a polyester/enamel coating for maximum corrosion protection.Coating shall
comply with ASTM B117/D1654 and ASTM D2126 for corrosion resistance against common acids,salt and gases.
2. Coil shall have galvanized casing and end plates.
3. Aluminum fin and copper tubes mechanically bonded to assure high heat transfer.
B. Air reheat condenser coils shall be sized for variable heat transfer into the air with a capacity of 100%of the compressors
total required heat of rejection.
1. Coils shall be fully dipped and coated with a polyester/enamel coating for maximum corrosion protection.Coating shall
comply with ASTM B117/D1654 and ASTM D2126 for corrosion resistance against common acids,salt and gases.
2. Coil shall have galvanized casing and end plates.
3. Aluminum fin and copper tube joints mechanically bonded to assure high heat transfer
8. Drain Pans
Each evaporator coil shall be provided with a positive draining,compound-sloped,baked powder paint coated aluminum drain
pan with fully-welded corners to ensure zero water retention.
9. Blowers and Blower Motors
A. Supply blowers:
1. The Supply blower shall be impeller plenum fan complete with backward curved,three-dimensional,profiled blades
made of high performance composite material.The blower shall be completely corrosion resistant and be maintenance
free and is direct drive via a direct current (DC)electronic commuted(EC)motor.The EC-Motor shall have zero
slippage design and have continuously variable speed control when connected to the unit's controller.
2. The EC motor shall have maintenance-free electronic circuitry,a rotor with permanent magnets,and an integral
controller to provide the windings with electrical current so that,the motor rotates continuously and quietly.
3. The fan assembly shall be suitable for a maximum temperature of 60°C.
4. The fan shall be statically and dynamically balanced on precision electronic balancers.
B. Exhaust blowers:
1. The exhaust blower(EF1)sized to maintain the Natatorium's negative pressure requirement during normal operation
shall be remote by others and interlocked to the unit's occupancy scheduler.
10. Dampers
Internal dampers shall be parallel blade and made from extruded anodized Aluminum with neoprene double seal tips to
minimize leakage.Damper blades shall be mounted on steel rods which rotate on nylon bushings.All damper hardware shall be
corrosion resistant.
A. Unit shall be provided with a power open and spring return outside air and exhaust air dampers. Dampers adjust between
0%to 100%open position.
B. Outdoor air and exhaust air dampers shall be opposed blade,power open and spring return.Dampers blades shall be 3/4"
insulated type made from extruded anodized Aluminum with neoprene double seal tips to minimize leakage.Damper
leakage shall be less than 1%of maximum flow at 4-inch W.C. differential.Damper blades shall be mounted on steel rods
which rotate on nylon bushings.All damper hardware shall be corrosion resistant.
11. Pool Water Heater
Coaxial type with corrosion resistant cupro-nickel water circuit tubing.
A. Coaxial type with corrosion resistant cupro-nickel water circuit tubing.
B. Self-purging and self-draining counter flow design.
C. Water circuit piping shall be transparent braided hose,for visual water flow confirmation.
D. Terminating connections are PVC schedule 40 NPT fittings located at the cabinet wall for easy connection.
E. Maximum loop operating pressure:60 psig
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!DEctror1 General Specification
12. Compressors
A. Type:Scroll type,suction gas cooled,suitable for refrigerant R-410A
B. The compressors shall be mounted on rubber in shear isolators to prevent transmission of any noise and vibration to the
space below.
C. Removable crankcase heater for liquid migration protection.
D. Compressors shall be located outside the conditioned air stream in the units service vestibule.
E. Compressors shall have a 3-year warranty extension for a total of 5 years coverage.
F. Compressor manufacturer must have a wholesale outlet for replacement parts in the nearest major city.
13. Refrigeration Circuit
A. The unit shall consist of one refrigeration circuit for humidity and/or air conditioning control.
B. Refrigeration circuit shall have pressure transducers monitoring the refrigerant high and low pressures.The refrigeration
circuit shall be accessible for diagnostics,adjustment and servicing without the need of service manifold gauges.
C. Shall have solenoid control valves,check valves,a liquid line filter drier,liquid and moisture indicator,thermostatic
expansion valve and pump down solenoid valve.
D. Unit shall have an externally adjustable balanced port design mechanical thermostatic expansion valve.The valve shall
have a removable power head.
E. Tamper proof,hermetically sealed non-adjustable high and low pressure controls and refrigeration service valves shall be
installed using Schrader type valves. Refrigeration service valves shall be located outside of the airstream.
F. Receiver shall have two refrigerant level(maximum and minimum)indicating sight glasses.
G. Suction line shall be fully insulated with%inch closed cell insulation.
14. Control Panel
A. Electrical contractor shall be responsible for external power wiring and disconnect switch fusing.Power block terminals shall
be provided.
B. Shall be mounted inside the service vestibule outside of the process air stream.
C. Blower motors shall be protected with thermal trip overloads.
D. Unit shall have a voltage monitor with phase protection.
E. Available dry contacts shall include:
1. Alarm
2. Blower interlock
3. Stage 1 &2 heating
4. Outdoor air damper control
5. Remote exhaust fan#1
6. Remote exhaust fan#2
7. Outdoor-air cooled equipment
8. System on
9. Auxiliary pool heater 1
10. Heat recovery
F. Terminals shall be provided for 24 volt power to the outdoor air cooled condenser fan contactor.
G. All wiring shall be installed in accordance with UL or CSA safety electrical code regulations,and shall be in accordance with
NFPA.All components used shall be UL or CSA listed.
H. Color-coding and wire numbering shall be provided for easy troubleshooting. All wires shall be in a wire duct.Wiring
diagrams located near electrical panels on unit.
I. Compressors shall have a time delay start to prevent short cycling.
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-'---- `DEctron General Specification
15. Air Conditioning
Air-cooled air conditioning via condenser
A. Unit shall be equipped with air conditioning mode where excess compressor heat is rejected to an outdoor air-cooled
condenser.The outdoor air-cooled condenser shall be capable of rejecting 100%of the compressor heat rejection with an
air on temperature at summer design conditions.The outdoor condenser shall be equipped with a 24VAC control including
contactor for fan motor.
B. Unit shall be provided with a dry contact rated for 24VAC/5A to operate the remote outdoor condenser control.
C. Refrigeration circuit shall include refrigerant valves,receiver with pressure relief valve set at 650 psig,pressure control
valve and pressure differential valve,and two manual shutoff valves to isolate the outdoor condenser.
D. Coils shall be tested at 600 PSIG and mounted vertically for complete surface utilization. Coils shall be counter flow with a
minimum of 10 degrees of liquid sub-cooling and have adequate capacity to dissipate the total heat rejection of the system
at design conditions.Condensers shall have guards to protect the coils from vandalism and weather related damage.
E. The fan shall be a direct driven axial fan made of high-strength composite material in which the motor and controller are
integrated. It includes FE2owlet blades combined with guide vanes and EC commutated direct-current external rotor motors
provides maximum efficiency the quietest performance. The EC motor shall have maintenance-free electronic circuitry,a
rotor with permanent magnets,and an integral controller to provide the windings with electrical current so that,the motor
rotates continuously and quietly.The fan is aerodynamically-optimised,sickle-blade profile,patterned with serrated trailing
edge and winglets on the blade outer edge for energy and noise-optimised operation.
1. The fan assembly shall be balanced in Class G 6.3 acc DIN ISO 1940,dynamic on two levels.
2. The fan assembly shall be suitable for ambient temperatures of-40°C to max.+70°C.
3. Thermal contacts installed in the windings compliant with THCL 155.
4. Drive motor in external rotor principle,sealed in protection class IP54 with moisture protection impregnation of the
windings,topical protection.
5. High corrosion resistance design with high quality and reliability.
16. Factory Performance Testing
A. The unit shall be thoroughly tested under factory test conditions.A copy of the test report shall be available to the engineer
upon request.
B. Microprocessor controls shall be factory adjusted and preset to the design conditions during testing.
C. The unit shall be accessible for real-time monitoring while in the QC test chamber upon request.
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!DEctrOn General Specification
Part 3 - Execution
17. Product Delivery,Acceptance,Storage and Handling
A. Perform a thorough physical inspection of the unit upon delivery from the shipment carrier.
B. Identify and report any physical damage immediately to manufacturer.
C. If unit is to be stored prior to installation store in a clean,dry place.Protect from weather,dirt, fumes,water,construction,
and physical damage.
D. Handle unit carefully during installation to prevent damage,breaking,denting and scoring.
E. Damaged units or damaged components shall not be installed.Contact manufacturer for RMA instructions.
F. Comply with manufacturer's rigging and installation instructions for unloading the unit and moving it to the final location.
18. Connections
A. Where installing piping adjacent to units,allow space for service and maintenance.
B. Duct connections:Drawings indicate the general arrangements of the ducts.Connect units to ducts with flexible duct
connectors.Comply with requirements for flexible duct connectors.
C. Electrical connections:Comply with requirements for power wiring,switches and motor controls in electrical sections.
19. Installation
The agency responsible for start-up should work in accordance with the specifications and in accordance with the
manufacturer's instructions and only by workers experienced in this type of work.
20. Start Up
A. Detailed instructions for start up as provided by the manufacturer must be followed.
B. Installing contractor must contact the manufacturer prior to start up to confirm start up procedures.
C. Remote internet access and control must be initiated and confirmed by the factory prior to start up for extended labour
warranty to be in effect.
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