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Report MEGZC13 - 00-7c). 1 REcEIVED Service 1 r Y C 060- SF 2A Lu1`/Libra C' G Service Literature Facts ' IGAR�u,`D Li Unitary Product U1VISION Package Air Conditioner Customer Property: Contains Model YS wiring and service informa- tion. Please retain. Literature Type Service Facts Sequence 2A Date March 2003 File No. SV-UN-RT-YSC060-SF-2A 3/03 Supersedes YSC060-SF-2A 12/01 Models : Packaged Gas/Electric YSC060A3EL, YSC060A3EM, YSC060A3EH, YSC060A3EX, 5 Ton Rooftop Units YSC060A3EY, YSC060A3EZ, YSC060A3RL, YSC060A3RM, YSC060A3RH, YSC060A3RX, YSC060A3RY, YSC060A3RZ, YSC060A4EL, YSC060A4EM, YSC060A4EH, YSC060A4EX, YSC060A4EY, YSC060A4EZ, YSC06OA4RL, YSC060A4RM, YSC060A4RH, YSC060A4RX, YSC060A4RY, YSC060A4RZ, (`��` ``��� mow► ni,i;;;�h�l)), YSC060AWEL,YSC06OAWEM.. YSC060AWEH,YSC060AWEX YSC060AWEY,YSC060AWEZ, YSC060AWRL, YSC06OAWRM, YSC060AWRH, YSC060AWRX. rr YSC060AWRY,YSC060AWRZ, 41411.144 • NOTICE Warnings and Cautions appear at appropriate locations throughout this manual. Read these carefully WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices and where property-damage- only accidents could occur. Since the manufacturer has a policy of continuous product improvement. it reserves the right to change design and specifications without notice Page G-1332-1052 Table of Contents Product Specifications 3 Direct Drive Indoor Fan Option: Low & Medium Heat 4 Direct Drive Indoor Fan Option: High Heat 5 Belt Drive Indoor Fan Option: Low & Medium Heat 6 Belt Drive Indoor Fan Option: High Heat 7 Belt Drive Motor Sheave/RPM 8 Economizer Pressure Drop 8 Filter Pressure Drop 8 Heating Performance 8 Electro Mechanical Sequence of Operation 9 ReliaTel Sequence of Operation 10 Standard Short Orifice Cooling Pressure Curve 12 • Optional Expansion Valve Cooling Pressure Curve 12 Superheat Chart 13 Refrigeration Circuit Diagram 14 2 Product Specifications YSC060A3,4,K,W 208-230/60/3 380/60/3 460/60/3 575/60/3 Cooling Performance - Gross Cooling Capacity BTUH' 63,100 63,100 63.100 63,100 SEER/EER2 10.2 10.2 10.2 10.2 Nominal CFM/ARI Rated CFM 2,000/2,000 2,000/2,000 2,000/2,000 2,000/2,000 ARI Net Cooling Capacity 60,000 60,000 60,000 60.000 Integrated Part Load Value - -- - -- System Power(KW) 6.78 6.78 6.78 6.78 Heating Performance3'4'r Natural Gas Natural Gas Natural Gas Natural Gas Combustion Fan-Type Centrifugal/1 Centrifugal/1 Centrifugal/1 Centrifugal/1 Drive Type/No Speeds Direct/1 Direct/1 Direct/1 Direct/1 Motor HP 1/35 1/35 1/35 1/35 RPM 3300 3300 3300 3300 Volts/Ph/Hz 208-230/1/60 208-230/1/60 208-230/1/60 208-230/1/60 LR.Amps .6 .6 .6 6 Power Connection Min.Circuit Ampacity Direct Drive-Standard/Oversize 31.5/33.2 19.6/N/A 16.0/163 12.2/12.8 Fuse Size- Standard/Oversize 50/50 30/N/A 25/25 20/20 Min.Circuit Ampacity Belt Drive-Standard 30.3 N/A 15 6 11.8 Fuse Size- Standard 45 N/A 25 15 Compressor Number/Type 1/Alliance Scroll 1/Alliance Scroll 1/Alliance Scroll 1/Alliance Scroll Voltage 208-230/60/3 380/60/3 460/60/3 575/60/3 R.L.Amp/L.R. Amp 18.6/128.0 11.4/64.0 9.5/63.0 7.5/49.0 Sound Rating(BELS) Outdoor Coil-Type Lanced Lanced Lanced Lanced Tube Size(in.)OD 0.3125 0.3125 0.3125 0.3125 Face Area(sq ft) 8.81 8.81 8.81 8.81 Rows/FPI 2/17 2/17 2/17 2/17 Indoor Coil-Type Lanced Lanced Lanced Lanced Tube Size(in.)OD 0.3125 0.3125 0.3125 0.3125 Face Area(sq ft) 5 5 5 5 Rows/FPI 3/16 3/16 3/16 3/16 Refrigerant Control' Short Orifice Short Orifice Short Orifice Short Orifice ` Drain Connection Size(in.) 3/4" 3/4" 3/4" 3/4" Outdoor Fan-Type Propeller Propeller Propeller Propeller No.Used/Diameter(in.) 1/22 1/22 1/22 1/22 Drive Type/No Speeds Direct/1 Direct/1 Direct// Direct/1 CFM 3470 3470 3470 3470 No Motors/HP 1/0.33 1/0.4 1/0.33 1/0.33 Motor RPM 1115 1115 1115 1115 Direct Drive Indoor Fan-Type FC Centrifugal FC Centrifugal FC Centrifugal No Speeds 2 2 2 2 Motor Frame Size 48 48 48 48 Standard Motor Fan Diameter x Wdth(in) 11x11 12x11 11x11 11x11 Motor HP 0.9 1.00 0.9 0.9 Motor RPM LO/HI Tap 985/1100 1080/1135 985/1100 985/1100 High Static Motor Fan Diameter x 1Nidth(in) 12 x 11 N/A 12 x 11 12 x 11 Motor HP 1.0 N/A 1.0 1.0 Motor RPM LO/HI Tap 1080/1135 N/A 1080/1135 1080/1135 Belt Drive Indoor Fan-Type FC Centrifugal N/A FC Centrifugal FC Centrifugal No Speeds Variable Sheave N/A Variable Sheave Variable Sheave Belt Size AX26 N/A AX26 AX26 Motor Frame Size 56 N/A 56 56 Standard Motor Fan Diameter x Width(in.) 11 x 11 N/A 11 x 11 11 x 11 Motor HP 1.0 N/A 1.0 1.0 Motor RPM 1750 N/A 1750 1750 Filters Type-Throwaway' Standard Optional (No.)Size Recommended(in) Low Heat (2)20 x 25 x 1 (2)20 x 25 x 2 Medium Heat (2)20 x 25 x 1 (2)20 x 25x 2 High Heat (2)20 x 30 x 1 (2)20 x 30 x 2 Refrigerant Charge-(lbs-R22)' _ 4.9 4.9 4.9 4.9 Footnotes: 1 Cooling Performance is rated at 95 F ambient,80 F entering dry bulb,67 F entering wet bulb and nominal cfm listed. ARI capacity is net and includes the effect of fan motor heat. Base models are certified in accordance with the Unitary Air-Conditioner Equipment certification program,which is based on ARI Standard 210/240.All models tested in accordance with ARI Standard 210/240. 2.Rated at ARI conditions and in accordance with DOE test procedures. 3.All models are certified to ANSI Z21-47-1998.Ratings shown are for elevations up to 2000 ft. For higher elevations reduce ratings at a rate of 4%per 1000 ft.elevation. 4.Convertible to LP gas with orifice change. • 5.Refer to Heating Performance Table,page 8. 6.Refrigerant charge shown is a nominal value,for a more precise value see the unit nameplate. 7.Short Orifice is Standard, Expansion Valve is Optional. 8.One Inch Filter is Standard, Two Inch Pleated Filter is Optional. 3 Direct Drive Indoor Fan Option 4 Direct Drive Indoor Fan Option YS*060A"H,Z • External Static Pressure (Inches of Water) Model No Standard Motor Oversized Motor Downflow High Speed Low Speed High Speed Low Speed 1600 0.90 0.78 0.82 0.64 1.20 0.90 1.05 0.85 1700 0.85 0.82 0.68 0.65 1.15 0.94 0.95 0.89 1800 0.80 0.85 0.56 0.65 1.05 0.98 0.85 0.91 1900 0.70 0.88 0.46 0.65 0.98 1.02 0.75 0.94 2000 0.60 0.90 0.30 0.66 0.90 1.05 0.65 0.95 2100 0.50 0.93 0.14 0.66 0.80 1.10 0.50 0.96 2200 0.40 0.95 0.00 0.67 0.70 1.12 0.35 0.96 2300 0.30 0.97 --- --- 0.60 1.17 0.15 0.97 2400 0.20 1.00 --- --- 0.48 1.20 --- --- Model No Standard Motor Oversized Motor Horizontal High Speed Low Speed High Speed Low Speed CFM ESP BHP ESP BHP ESP BHP ESP BHP 1600 0.85 0.78 0.77 0.64 1.15 0.90 1.00 0.85 1700 0.80 0.82 0.63 0.65 1.10 0.94 0.90 0.89 1800 0.75 0.85 0.51 0.65 1.00 0.98 0.80 0.91 1900 0.65 0.88 0.41 0.65 0.93 1.02 0.70 0.94 2000 0.55 0.90 0.25 0.66 0.85 1.05 0.60 0.95 2100 0.45 0.93 0.09 0.66 0.75 1.10 0.45 0.96 2200 0.35 0.95 0.00 0.67 0.65 1.12 0.30 0.96 2300 0.25 0.97 --- --- 0.55 1.17 0.10 0.97 2400 0.15 1.00 --- --- 0.43 1.20 --- --- NOTES: 1. Data includes pressure drop due to wet coil and factory installed standard filters. 2. Airflow performance at 230,460,or 575 volts. 3. Fan Motor heat(Mbh)=4.39 X Fan BHP 4. Factory supplied motors, in commercial equipment,are definite purpose motors, specifically designed and tested to operate reliably and continuously at all cataloged conditions. Using the full horsepower range of our fan motors as shown in our tabular data will not result in nuisance tripping or premature motor failure. Products warranty will not be affected. 5. 5 ton oversized motor performance is with 12 x 11 FC blower wheel. 5 Belt Drive Indoor Fan Option YSC060A**L,M,X,Y Downflow Configuration External Static Pressure(Inches of Water) 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1 HP Standard Motor &Field Supplied Low Static Drive' 1 HP Standard Motor&Drive 1600 721 0.28 786 0.36 839 0.42 888 0.48 936 0.55 983 0.62 1025 0.69 1066 0.76 1103 0.83 1139 0.91 1800 795 0.38 855 0.471 907 0.54 953 0.61 997 0.68 1040 0.75 1082 0.83 1120 0.91 1159 0.99 1195 1.07 2000 870 0 51 1 925 0.60 976 0 69 1021 0 77 1061 0.84 1 100 0.92 1 139 1.00 1 178 1.08 1214 1.17 1251 1.26 2200 947 0.65 997 0.75 1045 0.85 1090 0.95 1129 1.04 1166 1.12 1201 1.20 1237 1.29 1272 1.38 1307 1.47 2400 1024 0.83 1070 0.93 1115 1.04 1158 115 1198 1.26 1234 1.35 1267 1.44 -- -- -- -- -- -- 1.10 1.20 1.30 1.40 1.50 CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1 HP Standard Motor&Drive 1600 1173 0.99 1205 1.07 1235 1.15 1264 1.24 1292 1.32 1800 1229 1.16 1261 1.24 1293 1.33 13.22 1.42 1 -- -- 2000 1283 1.34 1316 1.441 -- -- -- -- -- 2200 1 2400 -- -- -- -- -- -- - YSC060A**L,M,X,Y Horizontal Configuration External Static Pressure(Inches of Water) 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1 HP Standard Motor&Drive 1600 -- -- -- -- 1 907 0.47 959 0.55 1006 0.62 1046 0.69 1083 0.76 1118 0.82 1156 0.90 1192 0.98 1800 -- -- 1 941 0.55 983 0.61 1030 0.69 1076 0.77 1119 0.86 1156 0.94 1190 1.01 1223 1.09 1254 1.16 2000 980 0.65 1027 0.73 1066 0.79 1105 0.86 1148 0.95 1189 1.05 1229 1.14 1264 1.24 1296 1.32 1325 1.40 1 2200 1068 0.84 1113 0.94 1151 1.01 1186 1.08 1221 1.16 1260 1.26 1298 1.36 1335 1.471 -- -- -- -- 2400 1157 1.08 1199 1.18 1236 1.27 1269 1.34 1301 1.42 -- -- -- -- Factory Supplied Motors,In Commercial Equipment, 1.10 1.20 1.30 1.40 1.50 Are Definite Purpose Motors,Specifically Designed And CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP Tested To Operate Reliably And Continuously At All Cataloged Conditions.Using The Full Horsepower Range 1 HP Standard Motor&Drive Of Our Fan Motors As Shown In Our Tabular Data Will Not 1600 1229 1.07 1263 1.15 1297 1.24 1330 1.33 -- -- Result In Nuisance Tripping Or Premature Motor Failure 1800 1287 1.25 1320 1.34 1 - Our Product's Warranty Will Not Be Affected. 2000 -- -- -- 2200 -- -- -- 2400 -- NOTES: Data Includes Pressure Drop Due To Wet Coils And Filters. Fan Motor Heat(MBH)=3.15 x Fan BHP 1 Field Supplied Fan Sheave AK56 Required.Field Supplied Belt May Be Necessary. 6 Belt Drive Indoor Fan Option YSC060A**H,Z Downflow Configuration External Static Pressure(Inches of Water) 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1 HP Standard Motor &Field Supplied Low Static Drive' 1 HP Standard Motor&Drive 1600 721 0.28 786 0.36 839 0.42 888 0 48 936 0.55 983 0.62 1025 0.69 1066 0.76 1103 0.83 1139 0.91 1800 795 038 855 0.47 1 907 0-54 953 0 61 997 0.68 1040 0.75 1082 0.83 1120 0.91 1159 0.99 1195 1.07 2000 870 0.511 925 0.60 976 0.69 1021 0.77 1061 0.84 1100 0.92 1139 1.00 1178 1.08 1214 1.17 1251 1.26 2200 947 0.65 997 0.75 1045 0.85 1090 0.95 1129 1.04 1166 1.12 1201 1.20 1237 1.29 1272 1.38 1307 1.47 2400 1024 0.83 1070 0.93 1115 1.04 1158 1.15 1198 1.26 1234 1.35 1267 1.44 -- -- -- -- -- -- 1.10 1.20 1.30 1.40 1.50 CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1 HP Standard Motor&Drive 1600 1 173 0.99 1205 1 07 1235 1 15 1264 1.24 1292 1.32 1800 1229 1.1 6 1261 1.24 1293 1.33 1322 1.42 1 -- -- 2000 1283 1.34 1316 1.4 4 1 -- -- -- -- -- -- 2200 1 -- -- -- -- -- -- - 2400 -- -- -- -- -- -- - YSC060A**H,Z Horizontal Configuration External Static Pressure(Inches of Water) 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1 HP Standard Motor&Drive 1600 -- -- -- -- 907 0.47 959 0.55 1006 0.62 1046 0.69 1083 0.76 1118 0.82 1156 0.90 1192 0.98 1800 -- -- 1 941 0.55 983 0.61 1030 0.69 1076 0.77 1119 0.86 1156 0.94 1190 1.01 1223 1.09 1254 1.16 2000 980 0.65 1027 0.73 1066 0.79 1105 0.86 1148 0.95 1189 1.05 1229 1.14 1264 1.24 1296 1.32 1325 1.401 2200 1068 0.84 1113 0.94 1151 1.01 1186 1.08 1221 1.16 1260 1.26 1298 1.36 1335 1.47 -- -- -- -- 2400 1157 1.08 1199 1.18 1236 1.27 1269 1.34 1301 1.42 -- -- -- Factory Supplied Motors,In Commercial Equipment, 1.10 1.20 1.30 1.40 1.50 Are Definite Purpose Motors,Specifically Designed And CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP Tested To Operate Reliably And Continuously At All Cataloged Conditions.Using The Full Horsepower Range 1 HP Standard Motor&Drive Of Our Fan Motors As Shown In Our Tabular Data Will Not 1600 1229 1.07 1263 1.15 1297 1.24 1330 1.33 -- -- Result In Nuisance Tripping Or Premature Motor Failure. 1800 1287 1.25 1320 1.34 1 -- Our Product's Warranty WIII Not Be Affected. 2000 -- ---- -- -- -- 2400 NOTES: Data Includes Pressure Drop Due To Wet Coils And Filters. Fan Motor Heat(MBH)=3.15 x Fan BHP 1 Field Supplied Fan Sheave AK56 Required.Field Supplied Belt May Be Necessary 7 Performance Specifications Belt Drive Motor Sheave I Fan Speed Standard Turns 5 4 3 2 1 Closed Drive Open RPM 897 987 1077 1166 1256 1346 Economizer Pressure Drop Static Pressure Drop(Inches of W.C.) 100% 100% 100% Outside Air Return Air Return Air CFM Downflow Horizontal 1600 0.121 0.042 0.014 2000 0.183 0.070 0.025 2400 _ 0.257 0.103 0.038 Filter Pressure Drop Filter Pressure Drop(Inches of W.C.) Standard Filters Pleated Filters CFM 1 Inch 2 Inch 1600 0.10 0.15 1800 0.12 0.18 2000 0.15 0.22 2200 0.19 0.25 2400 0.22 0.29 Heating Performance Y*C060A3,4,W Heating Models Low Medium High Heating Inputs Btuh) 60000 80000 130000 Heating Output(Btuh) 48000 64000 104000 Air Temperature Rise F. 10/40 15/45 35/65 AFUE% 81 81 80 Steady State Effieciency% 81 81 80 No Burners 2 2 3 No Stages 1 1 1 Gas Connection Pipe Size(in) 1/2 1/2 1/2 Maximum Supply Gas Pressure:Natural 14"w.c. Minimum Manifold Gas Pressure. Natura 3.3"w.c. Flue Gas Content-%CO2 :Natural 6 to 8 Flue Gas Temperature Rise Above Ambi- 250 to 450 F Minimum Supply Air Temperature Across 40 F Heat Exchanger Al models are certified to ANSI Z21-47-1998. Ratings shown are for elevations up to 2000 ft. For higher elevations reduce ratings at a rate of 4%per 1000 ft elevatior Convertible to LP gas with orifice change. 8 Electro Mechanical Sequence of Operation These units are offered with two control options, Electro Electro Mechanical Control Cooling with an Economizer Mechanical and ReliaTel Controls. The ReliaTel Controls is The economizer is utilized to control the zone temperature a microelectronic control feature, which provides operating providing the outside air conditions are suitable. Outside air functions that are significantly different than conventional is drawn into the unit through modulating damper.When electro mechanical units. cooling is required and economizing is possible, the unit economizer actuator(ECA)opens the economizer damper. Note:Refer to the unit nameplate. If the ninth digit of The ECA continues to modulate the economizer damper the model number equals "E"proceed with the open/closed to keep the mixed air temperature in the 50 F following Sequence of Operation. to 55 F range. Electro Mechanical Control Cooling The thermostat will close the Y contacts to turn on contactor without an Economizer (CC1) if mechanical cooling is required. When the thermostat switch is set to the"Cool"position and the zone temperature rises above the cooling setpoint, the If economizing is not possible, the ECA drives the damper thermostat Y contacts close.The compressor contactor to the minimum position setpoint when the indoor fan relay (CC1) coil is energized provided the low pressure control (F) is energized and allows mechanical cooling operation. (LPC1)and (HPC1) are closed.When the CC1 contacts close, compressor(CPR1)and the outdoor fan motor Electro Mechanical Control Heating Operation (ODM)start. When the system switch is set to the"Heat" position and the zone temperature falls below the heating setpoint, the Ignition module(IGN)initiates a heat cycle. Electro Mechanical Control Evaporator Fan Operation When the thermostat fan selection switch is set to the Ignition Module "Auto" position, the Ignition Module(IGN)energizes the in- (IGN) runs self-check(including verification that the gas door fan relay(F)approximately 1 second after energizing valve is de-energized). (IGN) checks the high-limit switches the compressor contactor coil (CC1) in the cooling mode. In (TC01 &TCO2)for normally closed contacts, the pressure the heating mode, the Ignition Module(IGN)energizes the switch (PS)for normally open contacts, and the flame indoor fan relay (F)coil approximately 45 second after gas rollout(FR) switch for continuity. (IGN) energizes inducer ignition. Closing indoor fan relay(F)coil starts the indoor blower on high speed to check pressure switch closure. If fan motor(IDM). the pressure switch is closed, the inducer blower starts a 20-second prepurge (15 seconds on high speed followed by The(IGN)de-energizes the fan relay(F)approximately 60 5 seconds on low speed). If the pressure switch(PS) is still seconds after the cooling requirement has been satisfied to open, the inducer blower will continue to be energized on enhance unit efficiency.When the heating cycle is termi- high speed until pressure switch closure.After prepurge nated, the indoor fan relay (F) coil is de-energized approxi- completes, the(IGN)energizes the first stage of the gas mately 90 seconds after the heating requirement. valve, initiates spark for 2 seconds minimum, 7 seconds maximum (ignition trial) and detects flame and de-energizes When the thermostat fan selection switch is set to the"On" spark. From this point, a fixed 45 second indoor blower de- position, the(IGN) keeps the indoor fan relay coil(F)ener- lay on timing starts.After the indoor blower delay on is corn- gized for continuous fan motor operation. pleted, the (IGN)energizes the indoor blower .The (IGN) enters a normal operating loop where all inputs are continu- Economizer Set-Up ously monitored. When the zone thermostat is satisfied, the Adjusting the minimum position potentiometer located on (IGN)de-energizes the gas valve.The (IGN) senses loss of the unit economizer Actuator(ECA)sets the required flame.The (IGN) initiates a 5 second inducer blower amount of ventilation air. postpurge and 90 second indoor blower delay off at current speed.The(IGN)de-energizes the inducer blower at the 1.Ambient Temperature-controlling the economizing cycle end of the postpurge, The (IGN)de-energizes the indoor by sensing the outside air dry bulb temperature.The blower at the end of the selected indoor blower delay off. Table below lists the selectable dry bulb values by poten- tiometer setting. Potentiometer Dry Enthalpy Setting Bulb A 73* 27 B 70 25 C 67 23 D 63 22 Factory Setting 9 ReliaTel Sequence of Operation These units are offered with two control options, Electro When the unit is equipped with the optional fan failure Mechanical and ReliaTel Controls.The ReliaTel Controls is switch, wired between terminals J7-10 and J7-11 on the a microelectronic control feature,which provides operating ReliaTel Options Module (RTOM), the RTRM produces an functions that are significantly different than conventional analog output if the fan failure switch (FFS)does not open electro mechanical units.The master module is the ReliaTel within two minutes after a request for fan operation. When Refrigeration Module (RTRM). the system is connected to a remote panel, the"SERVICE" LED will be turned on when this failure occurs. Note:Refer to the unit nameplate. If the ninth digit of the model number equals "R"proceed with the Low Ambient Operation (ReliaTel Control Only) following Sequence of Operation. During low ambient operation, outside air temperature be- low 55 F, the RTRM will cycle the compressor and outdoor The RTRM provides compressor anti short cycle timing fan motor"Off"for approximately 3 minutes after every 10 functions through minimum"Off"and"On"timing to in- minutes of accumulated compressor run time The indoor crease reliability, performance and to maximize unit effi- fan motor(IDM)will continue to operate during this evapo- ciency. rator defrost cycle(EDC)and the compressor and outdoor fan will return to normal operation once the defrost cycle Upon power initialization, the RTRM performs self-diagnos- has terminated and the compressor"Off"time delay has tic checks to insure that all internal controls are functioning. been satisfied. It checks the configuration parameters against the compo- nents connected to the system. ReliaTel Control Cooling with an Economizer The economizer is utilized to control the zone temperature The LED located on the RTRM module is turned"On"within providing the outside air conditions are suitable. Outside air one second after power-up if all internal operations are is drawn into the unit through modulating dampers. When okay. cooling is required and economizing is possible, the RTRM sends the cooling request to the unit economizer actuator ReliaTel Control Cooling without an Economizer (ECA)to open the economizer damper.The RTRM tries to cool the zone utilizing the economizer to slightly below the When the system switch is set to the"Cool" position and the zone temperature setpoint. If the mixed air sensor(MAS) zone temperature rises above the cooling setpoint senses that the mixed air temperature is below 53 F, the controlband, the RTRM energizes the (K9) relay coil lo- damper modulates toward the closed position. If the zone cated on the RTRM.When the K9 relay contacts close, the temperature continues to rise above the zone temperature compressor contactor(CC1)coil is energized provided the setpoint controlband and the economizer damper is full low pressure control (LPC1)and(HPC1)are closed. When open, the RTRM energizes the compressor contactor the CC1 contacts close, compressor(CPR1)and the out- (CC1). door fan motor(ODM) start to maintain the zone ternpera- ture to within±2 F of the sensor setpoint at the sensed lo- The ECA continues to modulate the economizer damper cation. open/closed to keep the mixed air temperature that is calcu- lated by the RTRM. ReliaTel Control Evaporator Fan Operation When the fan selection switch is set to the"Auto" position, If economizing is not possible, the ECA drives the damper the RTRM energizes the(K6) relay coil approximately 1 to the minimum position setpoint when the indoor fan relay second after energizing the compressor contactor coil (F) is energized and allows mechanical cooling operation. (CC1) in the cooling mode. In the heating mode, the RTRM energizes the(K6) relay coil approximately 45 second after When the unit is equipped with the optional fan failure gas ignition. Closing the K6 contacts on the RTRM ener- switch, wired between terminals J7-10 and J7-11 on the gizes the indoor fan relay(F)coil to start the indoor fan mo- RTOM, the RTRM will stop all cooling functions and pro- tor(IDM). duce an analog output if the fan failure switch (FFS)does not open within 40 seconds after a request for fan opera- The RTRM de-energizes the fan relay(F)approximately 60 tion. When the system is connected to a remote panel, the seconds after the cooling requirement has be satisfied to "SERVICE" LED will flash when this failure occurs. enhance unit efficiency.When the heating cycle is termi- nated, the indoor fan relay (F) coil is de-energized approxi- Economizer Set-Up mately 90 seconds after the heating requirement. Adjusting the minimum position potentiometer located on the unit economizer Actuator(ECA)sets the required When the fan selection switch is set to the"On" position, amount of ventilation air. the RTRM keeps the indoor fan relay coil(F)energized for continuous fan motor operation. Two of the three methods for determining the suitability of the outside air can be selected utilizing the enthalpy potenti- ometer on the ECA, as described below: 10 ReliaTel Sequence of Operation 1.Ambient Temperature -controlling the economizing cycle ReliaTel Control Heating Operation by sensing the outside air dry bulb temperature The When the system switch is set to the"Heat" position and the Table below lists the selectable dry bulb values by poten- zone temperature falls below the heating setpoint tiometer setting. controlband, a heat cycle is initiated when the RTRM communicates ignition information to the Ignition module 2. Reference Enthalpy-controlling the economizer cycle by (IGN). sensing the outdoor air humidity.The Table below lists the selectable enthalpy values by potentiometer setting. Ignition Module If the outside air enthalpy value is less than the selected (IGN)runs self-check(including verification that the gas value, the economizer is allowed to operate. valve is de-energized). (IGN) checks the high-limit switches (TC01 &TCO2)for normally closed contacts, the pressure 3. Comparative Enthalpy- By utilizing a humidity sensor switch (PS)for normally open contacts, and the flame and a temperature sensor in both the return air stream rollout(FR) switch for continuity. (IGN) energizes inducer and the outdoor air stream, the unit control processor blower on high speed to check pressure switch closure. If (RTRM)will be able to establish which conditions are the pressure switch is closed, the inducer blower starts a best suited for maintaining the zone temperature, i.e. in- 20-second prepurge (15 seconds on high speed followed by door conditions or outdoor conditions.The potentiometer 5 seconds on low speed). If the pressure switch (PS) is still located on the ECA is non-functional when both the tem- open, the inducer blower will continue to be energized on perature and humidity sensors are installed. high speed until pressure switch closure.After prepurge completes, the(IGN)energizes the first stage of the gas valve, initiates spark for 2 seconds minimum, 7 seconds Potentiometer Dry Enthalpy maximum (ignition trial)and detects flame and de-energizes Setting Bulb spark.The RTRM energizes the indoor blower 45 seconds A 73' 27 after ignition.The (IGN)enters a normal operating loop where all inputs are continuously monitored. When the zone B 70 25 thermostat is satisfied, the(IGN)de-energizes the gas C 67 23 valve.The (IGN) senses loss of flame.The (IGN) initiates a 5 second inducer blower postpurge and 90 second indoor 63 22 -— - blower delay off at current speed.The (IGN)de-energizes Factory Setting the inducer blower at the end of the postpurge. The (IGN) de-energizes the indoor blower at the end of the selected indoor blower delay off. 11 Refrigeration Data 1 , SHORT ORIFICE ' COOLING CYCLE PRESSURE CURVE (Based on Indoor Airflow of 400 CFM I Ton) 600 I . 550 500 • 0 ci _o a - — G — p _— � — : u 450 LL N f 400 aD A `� N co e3 115 F OD Ambient cc 350 � � I I ._ wa��lr 105 F OD Ambient _ Lu 0 300 r - -P ��/— 95 F OD Ambient 250 `� 4 1 85 F OD Ambient y F �I�i 75 F OD Ambient 200 �., 65 F OD Ambient 55 F OD Ambient 150 i 100 , . 50 55 60 65 70 75 80 85 90 95 100 105 110 SUCTION PRESSURE, PSIG To Check Operating Pressures 4.Take discharge and suction pressure readings. 1. Start the unit and allow the pressures to stabilize. 5. Plot the outdoor dry bulb and the indoor DB/WB 2. Measure the indoor DB/WB temperature entering temperature onto the chart. the indoor coil. 6.At the point of intersection, read down for the suction 3. Measure the outdoor air dry bulb temperature pressure and to the left for the discharge pressure. OPTIONAL EXPANSION VALVE COOLING CYCLE PRESSURE CURVE (Based on Indoor Airflow of 400 CFM I Ton) 600 550 . co E co 0 o 500 I a 0 a a w 1 a O p CL 450 u. u_ N r --- o —TS l 7_ n 400 ao c m 115 F OD Ambient Lu re a 350 �-�r- 105 F OD Ambient 0 .�.�� , 95 F OD Ambient 0 300 .-- .I I I I I = Mow 44,.../ 85 F OD Ambient N 250 --�,—=��- 75 F OD Ambient 7 ° 200 —A� 65 F OD Ambient - M— 55 F OD Ambient 150 100 , 50 55 60 65 70 75 80 85 90 95 100 105 110 SUCTION PRESSURE, PSIG To Check Operating Pressures 4. Take discharge and suction pressure readings. 1. Start the unit and allow the pressures to stabilize. 5. Plot the outdoor dry bulb and the indoor DB/WB 2. Measure the indoor DB/WB temperature entering temperature onto the chart. the indoor coil. 6.At the point of intersection, read down for the suction 3. Measure the outdoor air dry bulb temperature pressure and to the left for the discharge pressure. 12 Refrigeration Data . SUPERHEAT CHARGING CHART (Based on Indoor Airflow of 400 CFM I Ton) 50 I I I I I I I To Determine Required Superheat- u_ A)Plot the Outdoor Temperature onto the bottom axis of the curve. w 40 _B)Move vertically to the appropriate indoor DB/WB temp. (or interpolate temp). o C)At the point of intersection. (OD& ID)read horizontally to the left for the required H -superheat. w 86/72 F ID DB/WB x 30 - w 80/67 F ID DB/WB �■� d i u�i 74/62 F ID DB/WB �,_` _ N 20 68 57 F ID DB/WB EMMEN w�a 10 ■1111114 , 0 U 44 0 , , , , , , , 35 45 55 65 75 85 95 105 115 OUTDOOR AMBIENT, DB F 1)REFRIGERANT CHARGE -ADD if the superheat is more than 5 F above curve value. -REDUCE if the superheat is more than 5 F below curve value. -OK if the superheat is within 5 F of curve value. 2)Do not add refrigerant if the superheat is less than 5 F. 3)Curves are based on 400 CFM/Ton Indoor Airflow @ 50% R.H. • 4)System must be running at stablized conditions before measuring superheat 13 Mechanical Data Refrigerant Circuit Diagram A CAUTION CONTAINS REFRIGERANT! SYSTEM CONTAINS OIL AND REFRIGERANT UNDER HIGH PRESSURE. RECOVER REFRIGERANT TO RELIEVE PRESSURE BEFORE OPENING THE SYSTEM. Failure to follow proper procedures can result in personal illness or injury or severe equipment damage. k HIGH PRESSURE CONTROL k INDOOR COIL SERVICE VALVE OUTDOOR COIL (8 CIRCUITS SHOWN) (4 CONDENSER CIRCUITS SHOWN) HORT ORIFIC C1 PER CIRCUE IT) f =o--)5.-1 DISCHARGE H tt t 1 \ 1 tc--) _ -{DISCHARGE (- VALVE OE r LOW PRESSURE C t-.) L CONTROL t 1 + t CSUCTION 1 COMPRESSOR �1 t 1 SUCTION ( ) ( LINE t . t t t 1 L t� t 1 VALVE 4-SERVICE 1 LIQUID LINE —J Shia' ..1-S UNIT NO. CIRCUITS NO CIRCUITS is INDOOR OUTDOOR REFRIGERANT YHC036,THC036 8 4 FLOW YSC048A1,TSC048A1 10 4 YSC04BA3,TSCO48A3 9 4 YHC048,THC048 10 6 4366-1312A YSC060,TSC060 12 6 YHC060,THC060 12 7 14 ©American Standard Inc.2003 Technical Literature Printed in USA 16