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1183746-UIM-D-1015

4

Johnson Controls Unitary Products

LOCATION

Use the following guidelines to select a suitable location for these units:

1.

Unit is designed for 

outdoor installation

 only.

2.

Condenser coils must have an unlimited supply of air. Where a
choice of location is possible, position the unit on either north or
east side of building.

3.

Suitable for mounting on roof curb.

4.

For ground level installation, a level pad or slab should be used.
The thickness and size of the pad or slab used should meet local
codes and unit weight. Do not tie the slab to the building foundation.

5.

Roof structures must be able to support the weight of the unit and
its options/accessories. Unit must be installed on a solid, level roof
curb or appropriate angle iron frame.

6.

Maintain level tolerance to 1/8” across the entire width and length of
unit.

CLEARANCES

All units require particular clearances for proper operation and service.

Installer must make provisions for adequate combustion and ventilation
air in accordance with section 5.3 of Air for Combustion and Ventilation
of the National Fuel Gas Code, ANSI Z223.1 – Latest Edition (in
U.S.A.), or Sections 7.2, 7.3, or 7.4 of Gas Installation Codes, CSA-
B149.1 (in Canada) - Latest Edition, and/or applicable provisions of the
local building codes. Refer to Table 4 for clearances required for com-
bustible construction, servicing, and proper unit operation.

RIGGING AND HANDLING

Exercise care when moving the unit. Do not remove any packaging until
the unit is near the place of installation. Rig the unit by attaching chain
or cable slings to the lifting holes provided in the base rails. Spreader
bars, whose length exceeds the largest dimension across the unit,

MUST

 be used across the top of the unit.

Units may be moved or lifted with a forklift. Slotted openings in the base
rails are provided for this purpose.

 WARNING

Do not attach supply and return duct work to the bottom of the unit
base pan as the drain pan could be compromised.

 WARNING

Excessive exposure of this unit to contaminated combustion air may
result in equipment damage or personal injury. Typical contaminates
include: permanent wave solution, chlorinated waxes and cleaners,
chlorine based swimming pool chemicals, water softening chemicals,
carbon tetrachloride, Halogen type refrigerants, cleaning solvents
(e.g. perchloroethylene), printing inks, paint removers, varnishes,
hydrochloric acid, cements and glues, anti-static fabric softeners for
clothes dryers, masonry acid washing materials.

 WARNING

Do not permit overhanging structures or shrubs to obstruct con-
denser air discharge outlet, combustion air inlet or vent outlets.

!

!

!

 CAUTION

Before lifting, make sure the unit weight is distributed equally on the
rigging cables so it will lift evenly.

 CAUTION

If a unit is to be installed on a roof curb other than a Unitary Products
roof curb, gasket or sealant must be applied to all surfaces that come
in contact with the unit underside.

 CAUTION

All panels must be secured in place when the unit is lifted.

The condenser coils should be protected from rigging cable damage
with plywood or other suitable material.

 FIGURE 2:  

Center of Gravity Location

!

!

!

X

CENTER OF
GRAVITY

FRONT
OF UNIT

Y

"D"

"C"

"B"

"A"

A0295-001

COMPRESSOR

Table 2: 

Weights and Dimensions

Model

Weight (lbs.)

Center of Gravity

4 Point Load Location (lbs.)

Shipping

Operating

X

Y

A

B

C

D

24050

372

367

28

15

120

95

81

71

24075

382

377

28

15

124

96

81

76

30050

417

412

28

15

139

99

90

84

30075

421

416

28

15

146

93

82

95

36050

425

420

28

15

141

107

94

78

36075

432

427

28

15

135

115

103

74

36100

436

431

28

15

139

113

99

80

42075

446

441

28

15

145

112

99

85

42100

448

443

28

15

148

110

96

89

48065

520

515

28

15

189

116

93

117

48100

528

523

28

15

169

139

115

100

48125

533

528

28

15

164

145

124

95

60065

537

532

29

15

174

142

124

92

60100

541

536

28

15

177

140

117

102

60125

548

543

27

15

151

167

141

84

Summary of Contents for PCG4A24

Page 1: ...al lation Only gas piping electric power and duct connections are required at the point of installation The gas fired heaters have spark ignition The refrigerant system is fully charged with R 410A Refrigerant and is tested and factory sealed SECTION II SAFETY This is a safety alert symbol When you see this symbol on labels or in manuals be alert to the potential for personal injury Understand and...

Page 2: ...onal information consult a qualified installer service agency or the gas supplier CAUTION This system uses R 410A Refrigerant which operates at higher pres sures than R 22 No other refrigerant may be used in this system Gage sets hoses refrigerant containers and recovery systems must be designed to handle R 410A If you are unsure consult the equip ment manufacturer Failure to use R 410A compatible...

Page 3: ...to a unit to meet local codes they are to be installed at the dealer s and or customer s expense Size of unit for 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 heating of buildings or structures under construction FIGURE 1 Component Location FAN MOTO...

Page 4: ...vided for this purpose WARNING Do not attach supply and return duct work to the bottom of the unit base pan as the drain pan could be compromised WARNING Excessive exposure of this unit to contaminated combustion air may result in equipment damage or personal injury Typical contaminates include permanent wave solution chlorinated waxes and cleaners chlorine based swimming pool chemicals water soft...

Page 5: ...nfined space and recirculate Direction Distance in Direction Distance in Top3 3 Units must be installed outdoors Over hanging structure or shrubs should not obstruct condenser air discharge outlet 36 Power Entry Right Side 36 Side Opposite Ducts 36 Left Side 24 Duct Panel 0 Bottom4 4 Units may be installed on combustible floors made from class A B or C roof covering materials 1 HIGH VOLTAGE CONNEC...

Page 6: ...ciency and increasing operating costs and wear and tear on the unit and controls Filters should be checked monthly this is especially important since this unit is used for both heating and cooling CONDENSATE DRAIN A condensate trap must be installed in the condensate drain The plumbing must conform to local codes DO NOT use Teflon tape or Pipe thread compound SERVICE ACCESS Access to all serviceab...

Page 7: ...it must be wired with a separate branch circuit fed directly from the main distribution panel and properly fused Refer to Figures 6 and 7 for typical field wiring and to the appropriate unit wiring diagram for control circuit and power wiring information FIGURE 6 Typical Field Control Wiring Diagram For Gas Heat AC Models FIGURE 7 Typical Field Power Wiring Diagram THERMOSTAT NOTE Heat Anticipator...

Page 8: ...47 49 53 55 Operating WT lbs 359 366 379 386 415 422 426 442 446 495 503 508 522 530 535 Compressors Type Recip Recip Recip Scroll Scroll Scroll Condenser Coil Data Face area Sq Ft 15 1 17 0 17 0 17 0 23 8 26 0 Rows 2 3 3 3 3 3 Fins per inch 16 16 16 16 16 16 Tube diameter 3 8 3 8 3 8 3 8 3 8 3 8 Circuitry Type Interlaced Interlaced Interlaced Interlaced Interlaced Interlaced Evaporator Coil Data ...

Page 9: ...ing on the outside of the pipe and blowing out the loose dirt and scale Before initial start up be sure that all of the gas lines external to the unit have been purged of air CAUTION This system uses R 410A Refrigerant which operates at higher pres sures than R 22 No other refrigerant may be used in this system CAUTION Do not leave the system open to the atmosphere Unit damage could occur due to m...

Page 10: ...nauthorized human contact around this area during the heating cycle Flue hood surfaces and the immediate area reach high temperatures during the heating cycle New Graphic to be added later AIR INTAKE HOOD AIR INTAKE SCREEN EXHAUST HOOD A0284 001 Table 9 Natural Gas Application Data Available On Models Input MBH 1 High Fire 1 Heating capacity valid for elevations up to 2000 feet above sea level For...

Page 11: ...995 942 889 834 Medium 3 1259 1209 1166 1126 1084 1032 980 928 Medium High 4 1314 1271 1229 1186 1144 1097 1049 998 High 5 1506 1471 1403 1389 1345 1305 1262 1216 36075 Low 1 1225 1174 1131 1090 1046 993 941 888 Low Medium 2 1259 1209 1166 1126 1084 1032 980 928 Medium 3 1314 1271 1229 1186 1144 1097 1049 998 Medium High 4 1348 1306 1259 1222 1179 1133 1086 1036 High 5 1506 1471 1403 1389 1345 130...

Page 12: ...1413 Medium 3 1922 1863 1804 1754 1724 1658 1612 1559 Medium High 4 2001 1952 1890 1839 1820 1742 1696 1651 High 5 2146 2085 2025 1960 1872 1862 1798 1735 60065 Low 1 1073 1043 1009 988 963 941 917 892 Low Medium 2 1329 1292 1250 1223 1192 1165 1136 1105 Medium 3 2054 1998 1934 1890 1843 1801 1757 1710 Medium High 4 2195 2144 2098 2049 2003 1955 1883 1868 High 5 2445 2388 2306 2293 2235 2178 2129 ...

Page 13: ... 863 Medium 3 1262 1223 1181 1137 1091 1044 994 952 Medium High 4 1324 1282 1245 1202 1161 1112 1067 1018 High 5 1517 1475 1447 1400 1357 1318 1275 1232 36075 Low 1 1231 1186 1146 1103 1069 1030 977 912 Low Medium 2 1270 1225 1189 1140 1098 1046 1008 960 Medium 3 1317 1286 1245 1198 1151 1110 1064 1024 Medium High 4 1358 1317 1275 1238 1197 1148 1105 1057 High 5 1517 1475 1447 1400 1357 1318 1275 ...

Page 14: ...1419 Medium 3 1912 1875 1805 1787 1750 1713 1672 1636 Medium High 4 2105 2014 2006 1931 1898 1845 1793 1739 High 5 2131 2058 1998 1949 1892 1840 1788 1728 60065 Low 1 1026 999 989 950 907 907 886 862 Low Medium 2 1263 1230 1192 1165 1167 1101 1099 1071 Medium 3 1987 1933 1861 1817 1820 1715 1725 1651 Medium High 4 2114 2050 2047 1974 1899 1889 1920 1866 High 5 2369 2308 2249 2183 2126 2088 2034 19...

Page 15: ...ion trial If the call for heat is removed during an ignition trial period the control immediately de energizes spark and gas The control runs the inducer motor through a post purge period before de energizing If the pressure switch opens during an ignition trial period the control immediately de energizes spark and gas The control begins pressure switch proving before an inter purge and reignition...

Page 16: ...ved or a call for heat W is removed Rollout switch lockout shall not reset automatically Power Interruptions Power interruptions of any duration shall not cause lockout or any oper ation requiring manual intervention Flame present with Gas off If flame is sensed for longer than 4 0 seconds during a period when the gas valve should be closed the control will enter lockout flashing 1 on the LED The ...

Page 17: ...rn off all electric power to the appliance if service is to be per formed 3 Remove the control access panel 4 Turn the gas valve switch to the OFF position DO NOT FORCE 5 Replace the control access panel Post Start Check List After the entire control circuit has been energized and the heating sec tion is operating make the following checks 1 Check for gas leaks in the unit piping as well as the su...

Page 18: ...E 10 Measuring External Static Pressure A0435 001 RETURN AIR DUCT SUPPLY AIR DUCT NOTICE To find the BTU input multiply the number of cubic feet of gas con sumed per hour by the BTU content of the gas in your particular locality Contact your gas company for this information since it varies widely from city to city Table 15 Gas Rate Cubic Feet Per Hour1 1 EXAMPLE By actual measurement it takes 38 s...

Page 19: ...or furnace heat active Control in Factory Test mode Operational Fault Codes Flashes None Slow Green Flashes Slow Amber Flashes Rapid Amber Flashes 4 Amber Flashes Steady on Red 1 Red Flash 2 Red Flashes 3 Red Flashes 4 Red Flashes 5 Red Flashes 6 Red Flashes 7 Red Flashes 8 Red Flashes 9 Red Flashes 10 Red Flashes 11 Red Flashes Fault Condition Power Off or open fuse Normal Operation Normal Operat...

Page 20: ... flame sense current No G from thermostat with Y call Control Failure Flame present with gas off Check pressure switch wiring Vent OR termination problem Airflow problem Flame Rollout Repeated pressure switch cycles Failed to light burners Loss of flame during call for heat Incorrect polarity OR Don t have neutral Gas valve shorted ON Check blower motor wiring CONTROL G GRN G BOARD RED RED GRN ROL...

Page 21: ...ed Flashes 11 Red Flashes Normal Operation Standby mode Call for furnace heat active Control in Factory Test mode Green Heartbeat Amber Heartbeat Rapid Green Flashes Power Off or open fuse Normal Operation Normal Operation with call for heat Low flame sense current No G from thermostat with Y call Control Failure Flame present with gas off Check pressure switch wiring Vent OR termination problem A...

Page 22: ...nt with gas off Check pressure switch wiring Vent OR termination problem Airflow problem Flame Rollout Repeated pressure switch cycles Failed to light burners Loss of flame during call for heat Incorrect polarity OR Don t have neutral Gas valve shorted ON Check blower motor wiring DSI Fault Codes CAUTION OPEN ALL DISCONNECTS BEFORE SERVICING THIS UNIT 1 ALL FIELD WIRING TO BE ACCOMPLISHED FOLLOWIN...

Page 23: ...y Manifold sets must be at least 700 psig high side and 180 psig low side with 550 psig retard All hoses must have a service pressure rating of 800 psig Leak detectors must be designed to detect HFC refrigerants Systems must be charged with liquid refrigerant Use a commercial type metering device in the manifold hose R 410A can only be used with POE type oils POE type oils rapidly absorb moisture ...

Page 24: ...1183746 UIM D 1015 24 Johnson Controls Unitary Products NOTES ...

Page 25: ...1 to L2 L2 to L3 L1 to L3 Total amperes L1 L2 L3 Compressor amperes L1 L2 L3 Measured voltage R and C outdoor unit control board Electrical Connections Inspection Check all that apply Equipment Data Additional Kits Accessories Installed Check all that apply Equipment Data Blower Type Set Up Supply air dry bulb temperature ADJUST A B C D A B C D Total external static pressure Supply static inches o...

Page 26: ...ion and Cycle Test Operate the unit through continuous fan cycles from the thermostat noting and correcting any problems Operate the unit through cooling cycles from the thermostat noting and correcting any problems Job site has been cleaned indoor and outdoor debris removed from job site Tools have been removed from unit All panels have been installed TXV Fixed Orifice Liquid line temperature Suc...

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