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INSTALLATION 
MANUAL

CAUTION:

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

SAVE THIS MANUAL

167791-BIM-B-0606

 

CONTENTS

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

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

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

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

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

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

NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7

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

OPERATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  60

START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .  65

START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .  66

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .  73

See 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.

Tested in accordance with:

SINGLE PACKAGE AIR CONDITIONERS AND

SINGLE PACKAGE GAS/ELECTRIC UNITS

DL/DU -06, -07, -08, -10 and -12

6-1/2 TO 12-1/2 TON

(9.0 TO 11.5 EER)

Summary of Contents for DL-06

Page 1: ...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...

Page 2: ...NOMIZER WITH DUAL ENTHALPY SENSORS 61 ECONOMIZER WITH POWER EXHAUST 61 MOTORIZED OUTDOOR AIR DAMPERS 61 COOLING OPERATION ERRORS 61 HIGH PRESSURE LIMIT SWITCH 61 LOW PRESSURE LIMIT SWITCH 61 FREEZESTA...

Page 3: ...TA DL 06 6 1 2 TON STANDARD EFFICIENCY W O PWRD CONV OUTLET 20 10 ELECTRICAL DATA DL 06 6 1 2 TON STANDARD EFFICIENCY W PWRD CONV OUTLET 20 11 ELECTRICAL DATA DU 06 6 1 2 TON HIGH EFFICIENCY W O PWRD...

Page 4: ...49 52 DL DU 07 7 1 2 TON OPTIONAL SIDE SHOT BLOWER PERFORMANCE 50 53 DL DU 08 8 1 2 TON STANDARD MOTOR SIDE SHOT BLOWER PERFORMANCE 51 54 DL DU 08 8 1 2 TON OPTIONAL DRIVE SIDE SHOT BLOWER PERFORMANCE...

Page 5: ...If damage is evident the extent of the damage should be noted on the carrier s freight bill A separate request for inspection by the carrier s agent should be made in writing Should overheating occur...

Page 6: ...only unit cooling unit with supple mental electric heat or a forced air furnace 2 For outdoor installation only 3 For installation on combustible material and may be installed directly on combustible...

Page 7: ...0 W 460 3 60 X 575 3 60 Product Style A Style A B Style B A No Options Installed Installation Options B Option 1 C Option 2 D Options 1 2 E Option 3 F Option 4 G Options 1 3 H Options 1 4 J Options 1...

Page 8: ...ng plate specified on Page 68 of these instructions 5 This equipment is not to be used for temporary heating of buildings or structures under construction PRECEDING INSTALLATION 1 Remove the two screw...

Page 9: ...r proposed installation should be based on heat loss heat gain calculation made according to the methods of Air Conditioning Contractors of America ACCA This furnace is not to be used for temporary he...

Page 10: ...Optional Disconnect Switch Filter Access 2 Filters Filter Drier Solid Core Condenser Section Two stage gas heat ing to maintain warm comfortable temperature Intelligent control board for safe and effi...

Page 11: ...id cements and glues antistatic fab ric softeners for clothes dryers masonry acid wash ing materials If a unit is to be installed on a roof curb other than a UPG roof curb gasketing must be applied to...

Page 12: ...X Y DL 06 47 1 2 25 1 2 DL 07 38 23 DL 08 38 23 DL 10 47 1 2 25 1 2 DL 12 47 1 2 25 1 2 DU 06 38 23 DU 07 38 23 DU 08 38 23 DU 10 47 1 2 25 1 2 DU 12 47 1 2 25 1 2 D A C B E F L E F T F R O N T X Y L...

Page 13: ...7 8 Power Entry 2 1 2 LEFT FRONT For Drain Dimensions See Detail C 11 1 2 X TABLE 6 UNIT HEIGHT Unit Model Number X DL 06 50 3 4 DL 07 42 DL 08 42 DL 10 50 3 4 DL 12 50 3 4 DU 06 42 DU 07 42 DU 08 42...

Page 14: ...6 3 8 18 1 16 19 5 8 63 1 2 27 1 2 18 24 21 12 5 16 LEFT FRONT Bottom Condensate Drain Bottom Power Control and Convenience Outlet Wiring Entries Bottom Gas Supply Entry FIGURE 10 REAR DUCT DIMENSIONS...

Page 15: ...cover changes are necessary For side duct application remove the side duct covers and install over the bottom duct openings The panels removed from the side duct connections are designed to be reused...

Page 16: ...th each unit One inch filters may be used with no modification to the filter racks Filters must always be installed ahead of evaporator coil and must be kept clean or replaced with same size and type...

Page 17: ...uge as the replaced wire A disconnect must be utilized for these units Factory installed disconnects are available If installing a disconnect field supplied or UPG supplied accessory refer to Figure 4...

Page 18: ...0 0 2 4 i n c l u d e s s u b b a s e 2 T e r m i n a l s A 1 a n d A 2 p r o v i d e a r e l a y o u t p u t t o c l o s e t h e o u t d o o r e c o n o m i z e r d a m p e r s w h e n t h e t h e r...

Page 19: ...NIT WITH WITHOUT ELECTRIC HEAT TERMINAL BLOCK TB1 FACTORY OR FIELD SUPPLIED DISCONNECT GROUND LUG THREE PHASE POWER SUPPLY FIGURE 20 FIELD WIRING DISCONNECT COOLING UNIT WITH GAS HEAT L1 T1 L2 T2 T3 L...

Page 20: ...A Actual KW Heater Amps Min Circuit Ampacity Amps MCA w Power Exhaust Amps Supply Blower Motor FLA Pwr Exh Motor Pwr Conv Outlet Electric Heater Model No Voltage Compressors OD Fan Motors 208 230 RLA...

Page 21: ...A FLA Actual KW Heater Amps Min Circuit Ampacity Amps MCA w Power Exhaust Amps Supply Blower Motor FLA Pwr Exh Motor Pwr Conv Outlet Electric Heater Model No Voltage Compressors OD Fan Motors RLA LRA...

Page 22: ...W Heater Amps Min Circuit Ampacity Amps MCA w Power Exhaust Amps 2 HP 3 HP Supply Blower Motor FLA Pwr Exh Motor Pwr Conv Outlet Electric Heater Model No 2 HP 3 HP Voltage Compressors OD Fan Motors RL...

Page 23: ...city Amps MCA w Power Exhaust Amps 2 HP 3 HP 10 9 5 5 10 9 5 5 3 HP 2 HP 3 HP 2 HP 3 HP 8 2 4 1 208 230 460 14 1 14 1 7 1 575 110 0 1 5 110 0 1 5 54 0 0 8 0 6 44 0 5 8 0 0 1 8 4 1 3 6 2 HP 3 HP RLA LR...

Page 24: ...Amps 3 HP 3 HP FLA FLA 3 HP 3 HP 3 HP 3 HP 3 HP 3 HP 3 HP 3 HP 208 11 7 88 0 460 6 4 42 0 230 11 7 88 0 3 5 10 9 10 9 5 5 3 5 5 3 5 3 2 2 0 0 10 9 10 9 5 5 0 0 0 0 575 5 1 36 0 1 3 4 1 4 1 1 8 0 0 1...

Page 25: ...s 3 HP 3 HP FLA FLA 3 HP 3 HP 3 HP 3 HP 3 HP 3 HP 3 HP 3 HP 208 11 7 88 0 460 6 4 42 0 230 11 7 88 0 3 5 10 9 10 9 5 5 3 5 5 3 5 3 2 2 0 0 10 9 10 9 5 5 0 0 0 0 575 5 1 36 0 1 3 4 1 4 1 1 8 0 0 1 6 RL...

Page 26: ...ize Amps Max Fuse Size w Power Exhaust Amps FLA Pwr Conv Outlet Heater Amps Min Circuit Ampacity Amps FLA 208 16 3 150 0 3 5 230 460 575 Voltage Compressors OD Fan Motors Supply Blower Motor FLA RLA L...

Page 27: ...s Max Fuse Size w Power Exhaust Amps FLA Pwr Conv Outlet Heater Amps Min Circuit Ampacity Amps FLA 208 16 0 137 0 3 5 230 460 575 Voltage Compressors OD Fan Motors Supply Blower Motor FLA 54 RLA LRA F...

Page 28: ...0 1 42 7 46 2 45 5 49 45 50 50 50 2TP04523646 34 42 7 57 7 61 2 60 5 64 60 70 70 70 2TP04525446 54 67 8 71 6 75 1 74 3 77 8 80 90 80 90 None 21 8 23 7 23 6 25 5 25 30 30 30 2TP04521858 18 18 1 26 8 29...

Page 29: ...mps Max Fuse Size w Power Exhaust Amps FLA Pwr Conv Outlet Heater Amps Min Circuit Ampacity Amps FLA 208 18 9 146 0 3 5 230 460 575 Voltage Compressors OD Fan Motors Supply Blower Motor FLA 54 RLA LRA...

Page 30: ...croll Air Filters Size Wd X Ht x Thickness in 25x20x2 25x16x2 25x16x2 25x20x2 25x20x2 Number Per Unit 4 4 4 4 4 TABLE 30 DU PHYSICAL DATA Component Models 06 07 08 10 12 Evaporator Blower Blower Centr...

Page 31: ...irements Refer to the Pipe Sizing Table 33 The heating value of the gas may differ with locality The value should be checked with the local gas utility NOTE There may be a local gas utility requiremen...

Page 32: ...dmitting normal gas pressure to the mains Check all joints for leaks with soap solution or other material suitable for the purpose NEVER USE A FLAME TABLE 33 GAS PIPE SIZING CAPACITY OF PIPE Length of...

Page 33: ...aters are available as factory installed options or field installed accessories Refer to electric heat instructions for installation These heaters mount in the heat compartment with the heating elemen...

Page 34: ...t adjusting screw fully clockwise past the D setting POWER EXHAUST DAMPER SET POINT WITH OR WITH OUT POWER EXHAUST With no power exhaust option adjust the Exhaust Air Adjustment Screw fully clockwise...

Page 35: ...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 24 HONEYWELL ECONOMIZER CONTROL W7212 N1 N P1 P EXH Set EXH Min Pos IAQ Max IAQ IAQ Min Free Cool...

Page 36: ...o oper ate correctly Units are properly phased at the fac tory Do not change the internal wiring to make the blower condenser fans or compressor rotate cor rectly TABLE 34 SUPPLY AIR LIMITATIONS Unit...

Page 37: ...of the variable pitch motor sheave where 0 Turns Open is fully closed 5 W Watts TABLE 36 DL 06 6 1 2 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE1 2 ESP3 TURNS OPEN4 0 1 2 3 4 5 CFM W5 BHP CFM W5 B...

Page 38: ...H VXSSO DQG UHWXUQ DLU GXFW V VWHP OO LQWHUQDO UHVLVWDQFHV KDYH EHHQ GHGXFWHG IURP WKH WRWDO VWDWLF SUHVVXUH RI WKH EORZHU 7XUQV 2SHQ UHIHUV WR WKH VHWWLQJ RI WKH YDULDEOH SLWFK PRWRU VKHDYH ZKHUH 7XU...

Page 39: ...360 1 5 2051 1120 1170 1 2 1715 1069 950 1 0 1 2 2493 1273 1700 1 8 2228 1225 1420 1 5 1916 1176 1160 1 2 1323 1126 880 0 9 1 4 2284 1278 1520 1 6 1690 1231 1170 1 3 2 Blower performance includes two...

Page 40: ...RU WKH VXSSO DQG UHWXUQ DLU GXFW V VWHP OO LQWHUQDO UHVLVWDQFHV KDYH EHHQ GHGXFWHG IURP WKH WRWDO VWDWLF SUHVVXUH RI WKH EORZHU 7XUQV 2SHQ UHIHUV WR WKH VHWWLQJ RI WKH YDULDEOH SLWFK PRWRU VKHDYH ZKHU...

Page 41: ...2558 1209 1602 1 7 2259 1155 1318 1 4 1954 1101 1095 1 2 1 2 2799 1315 1977 2 1 2458 1264 1675 1 8 2223 1212 1408 1 5 1780 1159 1084 1 2 1 4 2401 1320 1775 1 9 2098 1269 1487 1 6 1 6 1940 1325 1514 1...

Page 42: ...0 2558 1209 1602 1 7 2259 1155 1318 1 4 1954 1101 1095 1 2 1 2 2799 1315 1977 2 1 2458 1264 1675 1 8 2223 1212 1408 1 5 1780 1159 1084 1 2 1 4 2401 1320 1775 1 9 2098 1269 1487 1 6 1 6 1940 1325 1514...

Page 43: ...1088 1110 1 2 1 2 2935 1367 2290 2 5 2685 1317 2000 2 1 2462 1261 1630 1 7 2160 1206 1380 1 5 1729 1151 1040 1 1 1 4 2615 1371 2150 2 3 2409 1319 1690 1 8 2106 1265 1470 1 6 1407 1213 1000 1 0 1 6 229...

Page 44: ...lly closed 5 W Watts TABLE 44 DL DU 10 10 TON OPTIONAL MOTOR DOWN SHOT BLOWER PERFORMANCE1 2 ESP3 TURNS OPEN4 0 1 2 3 4 5 CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP 0 4 4965 348...

Page 45: ...RMANCE1 2 ESP3 TURNS OPEN4 0 1 2 3 4 5 CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP 0 4 5994 5400 5 79 5565 4369 4 69 5488 4169 4 47 5264 3599 3 86 4990 3085 3 31 4738 2812 3 02 0...

Page 46: ...s to the setting of the variable pitch motor sheave where 0 Turns Open is fully closed 5 W Watts TABLE 48 DL 06 6 1 2 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE1 2 ESP3 TURNS OPEN4 0 1 2 3 4 5 CF...

Page 47: ...1 0 1542 947 760 0 8 1 2 2300 1126 1340 1 4 2070 1083 1160 1 2 1702 1040 950 1 0 1 4 1918 1131 1180 1 3 2 Blower performance includes two inch throwaway filters 3 ESP External Static Pressure given is...

Page 48: ...VXSSO DQG UHWXUQ DLU GXFW V VWHP OO LQWHUQDO UHVLVWDQFHV KDYH EHHQ GHGXFWHG IURP WKH WRWDO VWDWLF SUHVVXUH RI WKH EORZHU 7XUQV 2SHQ UHIHUV WR WKH VHWWLQJ RI WKH YDULDEOH SLWFK PRWRU VKHDYH ZKHUH 7XUQ...

Page 49: ...WKH VXSSO DQG UHWXUQ DLU GXFW V VWHP OO LQWHUQDO UHVLVWDQFHV KDYH EHHQ GHGXFWHG IURP WKH WRWDO VWDWLF SUHVVXUH RI WKH EORZHU 7XUQV 2SHQ UHIHUV WR WKH VHWWLQJ RI WKH YDULDEOH SLWFK PRWRU VKHDYH ZKHUH 7...

Page 50: ...VXSSO DQG UHWXUQ DLU GXFW V VWHP OO LQWHUQDO UHVLVWDQFHV KDYH EHHQ GHGXFWHG IURP WKH WRWDO VWDWLF SUHVVXUH RI WKH EORZHU 7XUQV 2SHQ UHIHUV WR WKH VHWWLQJ RI WKH YDULDEOH SLWFK PRWRU VKHDYH ZKHUH 7XUQ...

Page 51: ...WKH VXSSO DQG UHWXUQ DLU GXFW V VWHP OO LQWHUQDO UHVLVWDQFHV KDYH EHHQ GHGXFWHG IURP WKH WRWDO VWDWLF SUHVVXUH RI WKH EORZHU 7XUQV 2SHQ UHIHUV WR WKH VHWWLQJ RI WKH YDULDEOH SLWFK PRWRU VKHDYH ZKHUH 7...

Page 52: ...WKH VXSSO DQG UHWXUQ DLU GXFW V VWHP OO LQWHUQDO UHVLVWDQFHV KDYH EHHQ GHGXFWHG IURP WKH WRWDO VWDWLF SUHVVXUH RI WKH EORZHU 7XUQV 2SHQ UHIHUV WR WKH VHWWLQJ RI WKH YDULDEOH SLWFK PRWRU VKHDYH ZKHUH 7...

Page 53: ...W Watts TABLE 56 DL DU 10 10 TON OPTIONAL MOTOR SIDE SHOT BLOWER PERFORMANCE1 2 ESP3 TURNS OPEN4 0 1 2 3 4 5 CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP 0 2 5067 2614 2 80 4809...

Page 54: ...BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP CFM W5 BHP 0 4 6447 5315 5 70 6207 4760 5 1046 5966 4205 4 51 5717 3716 3 98 5470 3307 3 55 0 6 6110 4917 5 27 5965 4464 4 79 5740 4023 4 31 5430 3501 3 75 5126 30...

Page 55: ...1VM50 6 0 1 AK64 A49 DU 07 2 1725 80 1 15 56 3 4 4 4 7 8 1VM50 6 5 1 AK69 A49 3 1725 80 1 15 56 3 4 4 4 7 8 1VM50 6 0 1 AK64 A49 DL 08 3 1725 80 1 15 56 3 4 4 4 7 8 1VM50 6 0 1 AK64 A49 3 1725 80 1 15...

Page 56: ...ed CFM see SUP PLY AIR DRIVE ADJUSTMENT 6 After readings have been obtained remove the tubes and replace the dot plugs METHOD TWO 1 Drill two 5 16 inch holes one in the return air duct as close to the...

Page 57: ...ts Group 57 FIGURE 26 DRY COIL DELTA P 50 CABINET 8 DELQHW QGRRU RLO 3UHVVXUH URS YV LUIORZ LUIORZ 0 3 D W O H O L R U 8 8 FIGURE 27 DRY COIL DELTA P 42 CABINET 2 5 6 9 3 2 5 5 8 6 6 5 3 2 5 2 2 1 7 1...

Page 58: ...the required DD for the new motor sheave 4 000 CFM 3 800 CFM Use Table 63 to locate the DD nearest to 4 21 in Close the sheave to 1 turn open New BHP Speed increase 3 BHP at 3 800 CFM Speed increase 3...

Page 59: ...rom the available external static pressure shown in the respective Blower Performance Table 3 The pressure drop through the economizer is greater for 100 outdoor air than for 100 return air If the res...

Page 60: ...energized In free cooling mode if the call for the second stage of cooling continues for 20 minutes compres sor 2 is energized provided it has not been locked out If there is an initial call for both...

Page 61: ...r the 30 second monitoring phase the UCB will de energize the associated compressor initiate the ASCD and if the other compressor is idle stop the condenser fans Once the low pressure switch has been...

Page 62: ...r relay RA 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 relay RB will be energized Af...

Page 63: ...e the GV is opened and the spark ignitor is energized for 10 seconds The ICB then checks for the presence of flame If flame is detected the ICB enters a flame stabiliza tion period If flame was not de...

Page 64: ...operate the furnace until voltage is no longer sensed at the GV The draft motor is stopped when voltage is not sensed at the GV Any time the UCB senses voltage at the GV without a call for heat for a...

Page 65: ...anticipator setpoint be correct Too high of a setting will result in longer heat cycles and a greater temperature swing in the conditioned space Reducing the value below the correct setpoint will giv...

Page 66: ...urn OFF all electric power to unit 3 Open gas heat access panel 4 Turn gas valve clockwise to OFF position See Figure 29 MANIFOLD GAS PRESSURE ADJUSTMENT This gas furnace has two heat stages Therefore...

Page 67: ...Steps 1 5 To determine the rate of gas flow First Stage 1 Turn off all other gas appliances connected to the gas meter 2 Turn on the furnace and make sure the thermostat is calling for first stage 60...

Page 68: ...t heat Increase the blower CFM to decrease the temperature rise decrease the blower CFM to increase the rise See SUPPLY AIR DRIVE ADJUSTMENT NOTE Each gas heat exchanger size has a minimum allowable C...

Page 69: ...9 22 1 24 2 26 4 90 6 2 8 0 9 8 11 6 13 4 15 3 17 8 20 4 23 0 25 5 95 5 6 7 4 9 2 11 0 12 8 15 8 18 7 21 7 24 6 100 5 1 6 5 7 8 9 2 10 5 13 2 16 0 18 7 21 4 105 5 6 6 5 7 4 8 3 10 7 13 2 15 7 18 2 11...

Page 70: ...22 7 95 7 1 9 4 11 7 14 0 16 3 18 7 21 0 100 5 3 7 0 8 8 11 0 13 2 15 5 17 7 105 5 8 8 0 10 1 12 3 14 4 110 7 0 9 1 11 1 115 5 9 7 8 TABLE 74 DL 10 10 TON STANDARD EFFICIENCY SUPERHEAT CHARGING Outdo...

Page 71: ...13 6 15 5 17 4 19 2 21 1 23 0 24 8 26 7 28 6 105 6 0 8 0 10 0 12 0 14 0 16 0 18 0 20 0 22 0 24 0 26 0 110 4 8 6 5 8 2 9 8 11 5 13 2 14 8 16 5 18 2 19 8 21 5 115 3 7 5 0 6 3 7 7 9 0 10 3 11 7 13 0 14...

Page 72: ...3 3 70 27 5 29 0 30 5 32 0 33 5 35 0 36 5 37 4 38 4 39 3 40 3 75 25 1 26 7 28 2 29 7 31 2 32 7 34 2 35 0 35 7 36 5 37 2 80 22 8 24 3 25 8 27 3 28 9 30 4 31 9 32 5 33 1 33 6 34 2 85 20 4 21 9 23 4 25 0...

Page 73: ...con nected to the unit Use extreme care when working with live circuits Check the unit name plate for the correct line voltage and set the voltme ter to the correct range before making any connection...

Page 74: ...ch Failed To Close Venter Pressure Switch Vent Blocked 4 Limit Switch Open Main Limit AUX Limit 5 Flame Present With Gas Off First Stage Gas Valve Energized With W1 Off Second Stage Gas Valve Energize...

Page 75: ...g Yes Yes Loss of Call for Heating Loss of Call for Cooling Heat Off Cool Off Yes Yes No Call for ID Blower Fan off 10 secs Energize ID Blower Motor Yes Yes No Programming Program Unit Control Board T...

Page 76: ...a g a l a r m C a l l f o r H e a t w o u t G V v o l t a g e N o v o l t a g e 5 m i n F l a g A l a r m F O S i n p u t r e g a i n e d I n c r e a s e i n c i d e n t v a l u e b y 1 N o F O S i n...

Page 77: ...the thermostat and UCB are properly wired replace the UCB On calls for cooling the supply air blower motor is operating but compressor 1 is not the room thermostat fan switch is in the AUTO position 1...

Page 78: ...ibutors can test the UCB for this programming For units with factory installed economizers the UCB is programmed to lock out compressor operation when the LAS set point is reached For units without fa...

Page 79: ...ng calls Check the UCB for alarms indicating that compressor 1 is locked out Press and release the ALARMS button if the LED is not flashing an alarm 2 Check for line voltage at the compressor contacto...

Page 80: ...he error replace the UCB GAS HEAT TROUBLESHOOTING GUIDE 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 r...

Page 81: ...check for 24 volts at the pressure switch terminal on the ICB If not present check for 24 volts on the terminal from the pressure switch If present go to step 4 If 24 volts is not present the either p...

Page 82: ...167791 BIM B 0606 82 Unitary Products Group...

Page 83: ...167791 BIM B 0606 Unitary Products Group 83...

Page 84: ...t to change without notice Printed in U S A 167791 BIM B 0606 Copyright 2006 by Unitary Products Group All rights reserved Supersedes 167791 BIM A 1005 Unitary 5005 Norman Products York OK Group Drive...

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