York SUNLINE DCE Series User Manual Download

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INSTALLATION
MANUAL

CAUTION:

READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.

SAVE THIS MANUAL

SUNLINE™

GAS/ELECTRIC SINGLE PACKAGE

AIR CONDITIONERS

D(CE, CG) 036, 048, 060 & 072

D(HE, HG) 036, 048 & 060

290699-YIM-B-0607

CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . 5

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

REFERENCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . 6

APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . 6

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . 45

START-UP (GAS HEAT). . . . . . . . . . . . . . . . . . . . 45

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . 48

SEE THE FOLLOWING PAGES FOR A COMPLETE TABLE OF CONTENTS.

NOTES, CAUTIONS AND WARNINGS

The installer should pay particular attention to the words:

NOTE

CAUTION

, and

WARNING

. Notes are intended to

clarify or make the installation easier. Cautions are given to
prevent equipment damage. Warnings are given to alert
installer that personal injury and/or equipment damage may
result if installation procedure is not handled properly.

Summary of Contents for SUNLINE DCE Series

Page 1: ... NOMENCLATURE 6 INSTALLATION 8 OPERATION 39 START UP COOLING 45 START UP GAS HEAT 45 TROUBLESHOOTING 48 SEE THE FOLLOWING PAGES FOR A COMPLETE TABLE OF CONTENTS NOTES CAUTIONS AND WARNINGS The installer should pay particular attention to the words NOTE CAUTION and WARNING Notes are intended to clarify or make the installation easier Cautions are given to prevent equipment damage Warnings are given...

Page 2: ...WER EXHAUST 40 MOTORIZED OUTDOOR AIR DAMPERS 40 COOLING OPERATION ERRORS 40 HIGH PRESSURE LIMIT SWITCH 41 LOW PRESSURE LIMIT SWITCH 41 FREEZESTAT 41 LOW AMBIENT COOLING 41 SAFETY CONTROLS 41 COMPRESSOR PROTECTION 41 FLASH CODES 42 RESET 42 ELECTRIC HEATING SEQUENCE OF OPERATIONS 42 SAFETY CONTROLS 42 RESET 42 HEAT ANTICIPATOR SETPOINTS 42 GAS HEATING SEQUENCE OF OPERATION 43 GAS HEAT OPERATION ERR...

Page 3: ...NEYWELL ECONOMIZER CONTROL W7212 19 9 FOUR AND SIX POINT LOADING 20 10 UNIT DIMENSIONS 3 6 TON COOLING ONLY ELECTRIC HEAT FRONT VIEW 29 Fig Pg 11 UNIT DIMENSIONS 3 6 TON COOLING GAS HEAT FRONT VIEW 30 12 UNIT WITH ECONOMIZER RAINHOOD 30 13 UNIT WITH FIXED OUTDOOR AIR MOTORIZED DAMPER RAINHOOD 31 14 UNIT DIMENSIONS REAR VIEW 31 15 DISCONNECT BLOWER ACCESS LOCATION 32 16 BELT ADJUSTMENT 38 17 PRESSU...

Page 4: ...TRIC HEAT CORRECTION FACTORS 29 17 VOLTAGE LIMITATIONS 29 Tbl Pg 18 UTILITIES ENTRY 32 19 MINIMUM CLEARANCES 32 20 SUPPLY AIR BLOWER PERFORMANCE 3 TON BELT DRIVE SIDE DUCT APPLICATION 33 21 SUPPLY AIR BLOWER PERFORMANCE 4 TON BELT DRIVE SIDE DUCT APPLICATION 34 22 SUPPLY AIR BLOWER PERFORMANCE 5 TON BELT DRIVE SIDE DUCT APPLICATION 35 23 SUPPLY AIR BLOWER PERFORMANCE 6 TON BELT DRIVE SIDE DUCT APP...

Page 5: ...ed trained service personnel should install repair main tain or service this equipment Observe all precautions in the literature on labels and tags accompanying the equipment whenever working on air conditioning equipment Be sure to follow all other safety precautions that apply Wear safety glasses and work gloves and follow all safety codes Use a quenching cloth and have a fire extinguisher avail...

Page 6: ... to clarify or make the installation easier Cau tions are given to prevent equipment damage Warn ings are given to alert installer that personal injury and or equipment damage may result if installation proce dure is not handled properly PRODUCT NOMENCLATURE This product must be installed in strict compli ance with the enclosed installation instructions and any applicable local state and national ...

Page 7: ...le Package Air Conditioner Air Cooled PRODUCT GENERATION 2 Second Generation 3 Third Generation PRODUCT IDENTIFIER HE Cooling VOLTAGE CODE 036 3 Ton 048 4 Ton 060 5 Ton 25 208 230 3 60 46 460 3 60 58 575 3 60 A Cooling Only FACTORY INSTALLED HEAT NOMINAL COOLING CAPACITY D 3 H E 0 4 8 A 2 5 PRODUCT CATEGORY D Single Package Air Conditioner Air Cooled PRODUCT GENERATION 2 Second Generation 3 Third ...

Page 8: ...ures under construction LIMITATIONS These units must be installed in accordance with the following national and local safety codes In U S A National Electrical Code ANSI NFPA No 70 National Fuel Gas Code Z223 1 Gas Fired Central Furnace Standard ANSI Z21 47a Local gas utility requirements In Canada Current Canadian Electrical Code C22 1 Current Gas Installation Codes CSA B149 1 Local plumbing and ...

Page 9: ... for this pur pose Fork lengths must be a minimum of 42 inches Remove the nesting brackets from the four corners on the top of the unit All screws that are removed when removing the brackets must be replaced on the unit Refer to Tables 10 and 12 for unit weights and to the Figure 9 for approximate center of gravity CLEARANCES All units require certain clearances for proper operation and service In...

Page 10: ...hat this opening be accessible when the unit is installed in service and of a size such that smoke or reflected light may be observed inside the casing to indicate the presence of leaks in the heat exchanger The cover should be attached in a manner adequate to prevent leakage CONDENSATE DRAIN Plumbing must conform to local codes Use a sealing compound on male pipe threads Install a condensate drai...

Page 11: ...area and required sizes are shown in Physical Data Tables 9 and 11 SERVICE ACCESS The following removable panels provide access to all serviceable components Compressor compartment Electric Heat compartment Gas Heat compartment Blower compartment Main control box Filter compartment Refer to the Dimensions and Clearances shown in Fig ures 10 11 13 and 14 for location of these access panels Do not l...

Page 12: ...2 W1 W2 G LED 1 LED 2 COM A1 A2 T T B R Y1 Y2 G C X OCC W2 W1 THERMOSTAT1 TERMINALS UNIT TERMINAL STRIP TB1 24 VOLT TRANSFORMER TO REMOTE SENSOR 2TH040702224 IF USED NOT USED ADD JUMPER ADD JUMPER 4 4 3 2 1 ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET04700224 INCLUDES SUBBASE SECOND STAGE COOLING IS NOT REQUIRED ON UNITS LESS ECONOMIZER 2 SECOND STAGE HEATING IS ONLY REQUIRED ON UNITS WITH A TWO STAGE E...

Page 13: ...nd or local codes If any of the wire supplied with the unit must be replaced replacement wire must be of the type shown on the wiring diagram and the same minimum gauge as the replaced wire Use copper conductors properly sized to carry the load Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused Refer to the Typical Field Wiring Figure 3 and ...

Page 14: ...the range shown TABLE 3 ELECTRIC HEATER CFM LIMITATIONS UNITMODEL SIZE NOMINAL TONS VOLTAGE MINIMUM SUPPLY AIR CFM HEATER SIZE NOMINAL KW 5 7 10 15 20 30 3 208 230 3 60 1100 1100 1200 1200 1300 460 3 60 1100 1200 1200 1300 575 3 60 1200 1200 1300 4 208 230 3 60 1300 1300 1300 1300 1300 460 3 60 1300 1300 1300 1300 575 3 60 1300 1300 1400 5 208 230 3 60 1600 1600 1600 1600 1600 1600 460 3 60 1600 1...

Page 15: ...n the unit should be sealed to prevent water from leaking into the building Gas piping recommendations 1 A drip leg and a ground joint union must be installed in the gas piping 2 When required by local codes a manual shut off valve may have to be installed outside of the unit 3 Use wrought iron or steel pipe for all gas lines Pipe compound should be applied sparingly to male threads only 4 All pip...

Page 16: ...rovided at the unit manifold under full load Maintaining proper gas pressure depends on three main factors 1 The vaporization rate depends on a the tempera ture of the liquid and b the wetted surface area of the container or containers 2 The proper pressure regulation Two stage regula tion is recommended from the standpoint of both cost and efficiency 3 The pressure drop in the lines between regul...

Page 17: ...openings on the gas heat access panel ECONOMIZER MOTORIZED DAMPER AND RAIN HOOD The instruction for the optional economizer motorized damper and rain hood can be found in form 035 07364 000 Use these instructions when field assem bling an economizer rain hood onto a unit The outdoor and return air dampers the damper actuator the damper linkage the outdoor and return air divider baf fles and all th...

Page 18: ...USTMENT The enthalpy set point may now be set by selecting the desired setpoint shown in the Enthalpy Setpoint Adjust ment Figure 7 Adjust as follows For a single enthalpy operation carefully turn the set point adjusting screw found on the damper control module to the A B C or D setting corresponding to the lettered curve of the Enthalpy Setpoint Adjustment Figure 7 For a dual enthalpy operation c...

Page 19: ... D C C B B A A CONTROL CURVE CONTROL POINT APPROX 0 F 0 C AT 50 RH A D C B 63 17 73 23 70 21 67 19 FIGURE 8 HONEYWELL ECONOMIZER CONTROL W7212 N1 N P1 P EXH Set EXH Min Pos IAQ Max IAQ IAQ Min Free Cool T T1 AQ1 AQ SO SO SR SR A B C D TR TR1 24 Vac HOT 24 Vac COM EF EF1 2 3 4 5 1 Exhaust Air Adjustment Screw Exhaust Air LED Damper Min Position Screw Indoor Air Quality Max Adjustment Screw Indoor A...

Page 20: ...94 102 100 99 126 128 129 DCE060 Cooling Electric 640 142 140 178 181 95 94 93 118 119 121 DCG060N079 700 155 153 194 198 104 103 101 129 131 132 DCG060N099 710 158 155 197 201 105 104 103 131 132 134 DCE072 Cooling Electric 720 160 157 200 203 107 106 104 133 134 136 DCG072N079 780 173 170 216 220 116 114 113 144 146 147 DCG072N099 790 175 172 219 223 117 116 114 146 147 149 TABLE 8 D HE HG 4 AND...

Page 21: ...Deep 1 1 1 2 Fins Per Inch 16 16 22 16 Face Area Sq Ft 17 1 17 1 17 1 16 7 COMPRESSOR Qty Per Unit Quantity Type 1 Recip 1 Scroll 1 Scroll 1 Scroll AIR FILTERS Quantity Per Unit 15 X 20 X 1 or 2 2 2 2 2 Quantity Per Unit 14 X 25 X 1 or 2 1 1 1 1 Total Face Area sq ft 6 3 6 3 6 3 6 3 CHARGE Refrigerant 22 lbs oz 5 8 6 8 6 8 10 0 TABLE 10 D CE CG OPERATING WEIGHTS LBS MODEL SIZE 3 TON 4 TON 5 TON 6 ...

Page 22: ...p 2 2 2 Fins Per Inch 18 18 18 Face Area Sq Ft 17 1 17 1 17 1 COMPRESSOR Qty Per Unit Recip Type 1 1 1 AIR FILTERS Quantity Per Unit 15 X 20 X 1 or 2 2 2 2 Quantity Per Unit 14 X 25 X 1 or 2 1 1 1 Total Face Area sq ft 6 3 6 3 6 3 CHARGE Refrigerant 22 lbs oz 10 8 10 4 10 14 TABLE 12 D HE HG OPERATING WEIGHTS LBS MODEL SIZE 3 TON 4 TON 5 TON BASIC UNIT DHE Cooling Only 565 610 645 DHG Gas Electric...

Page 23: ...45107462 6 8 8 2 13 0 15 2CE045110462 10 1 12 1 17 9 20 2CE045115462 13 6 16 4 23 2 25 2CE045120462 19 5 23 5 32 1 35 575 3 60 3 9 36 0 0 8 2 2 None 7 3 15 2CE04511058 10 6 10 2 14 9 15 2CE04511558 15 9 15 3 21 3 25 2CE04512058 21 2 20 4 27 7 30 D CE CG 048 4 0 208 3 60 14 1 105 0 1 3 5 0 None 23 9 30 2CE045105252 4 11 1 23 9 30 2CE045107252 5 6 15 5 25 7 35 2CE04511025 8 22 2 34 35 2CE04511525 11...

Page 24: ... 15 3 22 4 25 2CE04512058 21 2 20 4 28 8 30 2CE04513058 30 4 29 3 39 9 40 D CE CG 072 6 0 208 3 60 18 9 146 0 1 3 6 8 None 31 7 40 2CE045105252 4 11 1 31 7 40 2CE045107252 5 6 15 5 31 7 40 2CE04511025 8 22 2 36 3 50 2CE04511525 11 9 33 0 49 8 50 2CE04512025 15 9 44 1 63 7 70 2CE04513025 22 2 61 6 85 5 90 230 3 60 18 9 146 0 1 3 6 8 None 31 7 40 2CE045105252 5 3 12 7 31 7 40 2CE045107252 7 5 18 0 3...

Page 25: ...07462 6 8 8 2 13 5 15 2CE045110462 10 1 12 1 18 4 20 2CE045115462 13 6 16 4 23 7 25 2CE045120462 19 5 23 5 32 6 35 575 3 60 3 9 36 0 0 8 2 0 None 7 5 15 2CE04511058 10 6 10 2 15 2 20 2CE04511558 15 9 15 3 21 6 25 2CE04512058 21 2 20 4 28 0 30 D CE CG 048 4 0 208 3 60 14 1 105 0 1 3 5 2 None 24 1 35 2CE045105252 4 11 1 24 1 35 2CE045107252 5 6 15 5 25 9 35 2CE04511025 8 22 2 34 3 35 2CE04511525 11 ...

Page 26: ...58 15 9 15 3 21 6 25 2CE04512058 21 2 20 4 28 30 2CE04513058 30 4 29 3 39 1 40 D CE CG 072 6 0 208 3 60 18 9 146 0 1 3 5 0 None 29 9 40 2CE045105252 4 11 1 29 9 40 2CE045107252 5 6 15 5 29 9 40 2CE04511025 8 22 2 34 45 2CE04511525 11 9 33 0 47 5 50 2CE04512025 15 9 44 1 61 4 70 2CE04513025 22 2 61 6 83 3 90 230 3 60 18 9 146 0 1 3 5 0 None 29 9 40 2CE045105252 5 3 12 7 29 9 40 2CE045107252 7 5 18 ...

Page 27: ...21 2 51 0 70 2 80 460 3 60 6 7 54 0 1 3 2 6 None 12 3 15 2CE045107462 6 8 8 2 13 5 15 2CE045110462 10 1 12 1 18 4 20 2CE045115462 13 6 16 4 23 7 25 2CE045120462 19 5 23 5 32 6 35 D HE HG 048 4 0 208 3 60 13 1 110 0 2 3 5 2 None 23 9 30 2CE045105252 4 0 11 1 23 9 30 2CE045107252 5 6 15 5 25 9 35 2CE04511025 8 0 22 2 34 3 35 2CE04511525 11 9 33 0 47 8 50 2CE04512025 15 9 44 1 61 7 70 230 3 60 13 1 1...

Page 28: ...0 29 1 40 2CE04511025 10 6 25 5 38 4 40 2CE04511525 15 9 38 2 54 3 60 2CE04512025 21 2 51 0 70 2 80 2CE04513025 29 6 71 2 95 5 100 460 3 60 8 3 69 0 1 3 2 6 None 14 3 20 2CE045107462 6 8 8 2 14 3 20 2CE045110462 10 1 12 1 18 4 20 2CE045115462 13 6 16 4 23 7 25 2CE045120462 19 5 23 5 32 6 35 2CE045130462 28 8 34 6 46 6 50 575 3 60 6 4 58 0 1 3 2 0 None 11 0 15 2CE04511058 10 6 10 2 15 2 20 2CE04511...

Page 29: ...W CAP MULTIPLIER 208 208 0 75 240 230 0 92 480 460 0 92 600 575 0 92 TABLE 17 VOLTAGE LIMITATIONS1 1 Utilization Range A in accordance with ARI Standard 110 POWER SUPPLY VOLTAGE MIN MAX 208 230 3 60 187 252 460 3 60 432 504 575 3 60 540 630 FIGURE 10 UNIT DIMENSIONS 3 6 TON COOLING ONLY ELECTRIC HEAT FRONT VIEW ...

Page 30: ...290699 YIM B 0607 30 Unitary Products Group FIGURE 11 UNIT DIMENSIONS 3 6 TON COOLING GAS HEAT FRONT VIEW FIGURE 12 UNIT WITH ECONOMIZER RAINHOOD DETAIL A ...

Page 31: ...290699 YIM B 0607 Unitary Products Group 31 FIGURE 13 UNIT WITH FIXED OUTDOOR AIR MOTORIZED DAMPER RAINHOOD DETAIL B FIGURE 14 UNIT DIMENSIONS REAR VIEW ...

Page 32: ... located by the side in the insulation Control Wiring2 2 Do not remove the 2 knockout ring Side Bottom B 2 KO1 Power Wiring Side Bottom C 1 5 8 KO Gas Piping Front D 1 1 2 KO Gas Piping Bottom TABLE 19 MINIMUM CLEARANCES LOCATION CLEARANCE Front 24 Cooling Electric Heat 32 Gas Heat Rear 12 Less Economizer 36 With Economizer or Fixed Air Motorized Damper Left Side Filter Access 24 Less Economizer 3...

Page 33: ...890 580 RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS 1700 1600 1500 1400 1055 875 1300 1036 780 1066 850 1200 1011 735 1047 765 1075 800 1100 987 690 1028 720 1060 750 1084 775 1000 963 655 1005 680 1040 695 1068 715 1089 735 900 936 615 980 645 1020 660 1050 670 1053 680 1090 690 0 60 0 70 0 80 AVAILABLE EXTERNAL STATIC PRESSURE IWG3 0 20 0 30 0 40 0 50 UNIT TONNAGE AIR F...

Page 34: ...M WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS 2000 1103 1270 1900 1085 1210 1800 1064 1145 1102 1180 1700 1040 1075 1081 1115 1121 1140 1600 1020 1005 1060 1050 1100 1085 1500 1003 945 1044 995 1086 1035 1400 982 880 1024 920 1067 965 1107 1000 1300 970 835 1010 870 1053 920 1099 960 1200 953 780 992 815 1034 855 1080 905 0 60 0 70 0 80 AVAILABLE EXTERNAL STATIC PRESSURE IWG3...

Page 35: ...65 830 RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS 2500 2400 1193 1665 2300 1170 1580 1202 1620 2200 1148 1480 1180 1530 2100 1121 1385 1155 1425 1190 1475 2000 1100 1285 1133 1340 1169 1385 1205 1445 1900 1079 1180 1110 1240 1143 1280 1178 1330 1222 1375 1800 1058 1060 1090 1135 1122 1190 1158 1240 1196 1295 1700 1035 960 1071 1030 1103 1100 1134 1140 1164 1175 1197 1205...

Page 36: ...RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS RPM WATTS 3200 3000 2800 1245 2190 2600 1193 1920 1222 1990 1250 2060 2400 1142 1675 1173 1730 1205 1800 1234 1885 2200 1090 1380 1124 1450 1155 1550 1186 1640 1217 1710 1249 1775 2000 1045 1175 1077 1200 1109 1275 1140 1360 1170 1460 1205 1545 1235 1600 1800 998 1050 1028 1060 1058 1060 1087 1075 1118 1150 1148 1250 1176 1360 0 60 0 70 0 80 AVAILA...

Page 37: ...724 800 1644 770 1531 710 6 1 HI 2101 1260 2000 1205 1914 1155 1830 1110 5 1 0 60 0 20 0 30 0 40 0 50 UNIT TONNAGE MOTOR SPEED UNIT TONNAGE MOTOR SPEED 3 1 4 1 5 1 AVAILABLE EXTERNAL STATIC PRESSURE IWG2 AVAILABLE EXTERNAL STATIC PRESSURE IWG2 0 90 0 80 1 00 3 1 4 1 0 70 1 Side Duct application 230 460 575 Volts 2 Includes allowances for a wet evaporator coil 1 filters and the heat exchangers Refe...

Page 38: ...0 08 0 09 0 10 0 11 0 12 0 14 0 16 0 19 0 22 0 08 0 10 0 12 0 14 0 16 0 18 0 20 0 23 0 26 0 29 0 32 COOLING ONLY2 RESISTANCE IWG CFM DESCRIPTION ECONOMIZER1 3 BOTTOM DUCT CONNECTIONS1 ELECTRIC HEATERS1 1 Deduct these resistance values from the available external static pressure shown in SUPPLY AIR BLOWER PERFORMANCE Tables 3 The pressure through the economizer is greater for 100 outdoor air than f...

Page 39: ...unit can be determined from the curve in Pressure Drop vs Supply Air CFM Figure 17 After readings have been obtained remove the tubes and reinstall the two 5 16 dot plugs that were removed in Step 1 NOTE De energize the compressors before taking any test measurements to assure a dry indoor coil OPERATION SEQUENCE OF OPERATIONS OVERVIEW For these units the thermostat makes a circuit between R and Y...

Page 40: ...izes the economizer The dampers will modulate to maintain a constant supply air temperature as monitored by the discharge air sensor If the outdoor air enthalpy is above the setpoint Y1 energizes the compressor and condenser fan motor only Once the thermostat has been satisfied it will de ener gize Y1 If the compressor has satisfied its minimum run time the compressor and condenser fan are de ener...

Page 41: ...sh a code Table 32 LOW AMBIENT COOLING To determine when to operate in low ambient mode the UCB has a pair of terminals connected to a temper ature activated switch set at 45ºF When the low ambi ent switch is closed and the thermostat is calling for cooling the UCB will operate in the low ambient mode Low ambient mode operates the compressors in this manner 10 minutes on 5 minutes off The indoor b...

Page 42: ...rst stage heat by the thermostat the heater sequencer 1S 15 20 30 kW 230 volt and contactor 2M 20 30 kW 460 and 575 volt will be energized After completing the specified fan on delay for heating the UCB will energize the blower motor If the second stage of heat is required heater sequencer 2S 12 20 30 kW 230 volt or contactor 3M 20 30 kW 460 and 575 volt will be energized After completing the spec...

Page 43: ...eration the ICB monitors the flame sense circuit the centrifugal switch the primary limit switch and the roll out switch If a signal from any of the inputs moves to a fault state then the ICB immediately closes the pilot and main gas valves The ICB will determine the device that is signaling a fault and flash a code for that device A primary limit trip centrifugal switch trip or flame sense fault ...

Page 44: ... heat the ICB checks the cen trifugal switch CS for open state before it energizes the draft motor If it is closed then the ICB will lock out the furnace and flash a code Table 33 If open then the ICB will energize the draft motor and verify that the switch closes before initiating the purging and ignition sequence If at any time during furnace operation the centrifugal switch opens then the ICB w...

Page 45: ...eneral infor mation section Check blower drive belt tension 6 Check the unit supply air CFM See CHECKING SUPPLY AIR CFM on page 38 7 Measure evaporator fan motor s amp draw 8 Set the room thermostat fan switch to off 9 Turn unit electrical power off OPERATING INSTRUCTIONS 1 Turn unit electrical power on 2 Set the room thermostat setting to lower than the room temperature 3 First stage compressors ...

Page 46: ...piping 2 Check for correct manifold gas pressures See Checking Gas Input on page 47 3 Check the supply gas pressure It must be within the limits shown on rating nameplate Supply pressure should be checked with all gas appliances in the building at full fire At no time should the standby gas line pressure exceed 13 nor the operating pressure drop below 5 0 for natural gas units If gas pressure is o...

Page 47: ...just upstream of the unit gas valve and downstream from the main manual shut off valve 3 Remove the gas piping closure panel 4 Disconnect wiring to the gas valves and spark igni tors Remove the manifold burner gas valve assembly by lifting up and pulling back Burners are now accessible for service Reverse the above procedure to replace the assem blies Make sure that burners are level and seat at t...

Page 48: ...nergized when the fan switch is in the AUTO posi TABLE 31 GAS RATE CUBIC FEET PER HOUR1 1 By actual measurement it takes 38 seconds for the hand on the 1 cubic foot dial to make a revolution with a 100 000 Btuh furnace running Using this information located 38 seconds in the first column in the table above Read across to the column headed 1 Cubic Foot where you will see that 95 cubic feet of gas p...

Page 49: ...will not immediately operate If both stages of cooling are requested simultaneously and the economizer pro vides free cooling following a short delay the com pressor will be energized unless it is locked out unless this option has been disabled through com puter communications 2 If no economizer is installed or the economizer is not opening to provide free cooling and the compressor does not energ...

Page 50: ... s Mate N Lock plug If the compressor energizes there is a fault in the economizer wiring or actuator 14 The UCB can be programmed to lock out compres sor operation during free cooling and in low ambi ent conditions These options are not enabled by default Local distributors can test the UCB for this programming For units with factory installed economizers the UCB is programmed to lock out compres...

Page 51: ...beat is steady then verify proper operation of the furnace If the ICB does not flash the heartbeat then gently move the wires in the harness connector while observing the ICB LED If you get any flashes of the ICB LED then there is still a bad connection or a broken wire If no flashes are seen while gently moving the wires with the harness connected to the ICB then replace the ICB and verify proper...

Page 52: ...then the temperature limits opens and the ICB closes the gas valve and flashes code 6 The primary limit is automatic reset type while the aux iliary limit is manual reset type If either one opens then the ICB removes power to the gas valve and the UCB energizes the indoor blower until the primary limit automatically resets or the auxiliary limit is manually reset Verify adequate air flow through t...

Page 53: ...n of 24VAC power the board may need to be replaced SYMPTOMATIC TROUBLESHOOTING On calls for heating the draft motor operates and the furnace lights but the supply air blower motor does not energize after a short delay the room thermostat fan switch is in AUTO position 1 Place the thermostat fan switch in the ON posi tion If the supply air blower motor energizes go to Step 10 2 If the supply air bl...

Page 54: ...raft motor relay If not present at terminal 7 of the draft motor relay then troubleshoot the transformer in blower section and its wiring If present at terminal 7 and not at termi nal 5 of the draft motor relay then the relay is at fault If the minimum voltage is present at terminal 5 of the draft motor relay then the draft motor is at fault The ignitor sparks at the pilot burner but the pilot doe...

Page 55: ...ot Applicable 2 Flashes Control waiting ASCD1 1 These flash codes do not represent alarms 3 Flashes HPS1 Compressor Lock out 5 Flashes LPS1 Compressor Lock out 7 Flashes FS1 Compressor Lock out 9 Flashes Ignition Control Locked Out Ignition Control Failure Limit Switch Trip No Jumper Plug in Heat Section 10 Flashes Compressors Locked Out On Low Outdoor Air Temperature1 11 Flashes Compressors Locke...

Page 56: ...ct to change without notice Printed in U S A 290699 YIM B 0607 Copyright 2007 by Unitary Products Group All rights reserved Supersedes 290699 YIM A 0207 Unitary 5005 Norman Products York OK Group Drive 73069 ...

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