York THGD Series Installation Manual Download Page 9

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835961-UIM-D-0213

Johnson Controls Unitary Products

SECTION IX: SYSTEM START-UP

ENERGIZE CRANKCASE HEATER

If this unit is equipped with a crankcase heater for the compressor, a
warning label with an adhesive back is supplied in the unit installation
instruction packet. This label should be attached to the field supplied
disconnect switch where it will be easily seen.

In order to energize the crankcase heater, set the indoor cooling ther-
mostat to the OFF position. Close the line power disconnect to the unit.

WITH POWER TO UNIT AND THERMOSTAT IN COOLING
POSITION:

1. In the cooling cycle, discharge gas is pumped to the outdoor coil

which is the condenser. The indoor coil is the evaporator.

2. If fan switch is in ON position, a circuit is made through blower relay

to provide continuous blower operation.

3. With fan switch in AUTO position, a circuit is made from thermostat

cooling contact through blower relay to provide blower operation.

4. System will cycle with thermostat demand to provide cooling as

needed.

An attempt to start the compressor without at least 8 hours of crank-
case heat will damage the compressor.

TABLE 1:

R-410A Saturation Properties

Temp °F

Pressure

PSIG

Temp °F

Pressure

PSIG

Temp °F

Pressure

PSIG

Temp °F

Pressure

PSIG

Temp °F

Pressure

PSIG

130

170

217

274

105

341

132

173

221

278

106

345

135

176

224

282

107

350

137

179

228

287

108

355

140

182

232

291

109

360

142

185

235

295

110

365

145

188

239

299

111

370

147

191

243

304

112

375

150

194

247

308

113

380

153

197

250

313

114

385

156

201

254

100

317

115

391

158

204

258

101

322

116

396

161

207

262

102

326.

117

401

164

211

266

103

331

118

407

167

214

270

104

336

119

412

FIGURE 10:

Heat Pump Flow Diagram

CHARGE COMPENSATOR

(Empty in cooling / full in heating)

(Not included in all Units)

FIELD CONNECTED LINE

INDOOR COIL

OUTDOOR
COIL

4-WAY
REVERSING
VALVE

FILTER DRYER
(Solid core)

SUCTION
ACCUMULATOR

LIQUID
SENSOR

COMPRESSOR

BI-FLOW
TXV/CHECK
VALVE (Cooling) **

BI-FLOW
TXV/CHECK
VALVE OR ORIFICE (Heating)

Summary of Contents for THGD Series

Page 1: ...nt charge may need to be changed for some indoor out door unit combinations elevation differences or total line lengths Refer to Application Data covering General Piping Recommendations and Refrigerant Line Length Part Number 247077 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 pay parti...

Page 2: ... to insure proper system operation and performance Line set change out is also recommended 1 Change out of the indoor coil to an approved R 410A coil condens ing unit combination with the appropriate metering device 2 Change out of the line set when replacing an R 22 unit with an R410 A unit is highly recommended to reduce cross contamination of oils and refrigerants 3 If change out of the line se...

Page 3: ...s necessary If soft copper must be used care must be taken to avoid sharp bends which may cause a restriction 2 The lines should be installed so that they will not obstruct service access to the coil air handling system or filter 3 Care must also be taken to isolate the refrigerant lines to minimize noise transmission from the equipment to the structure 4 The vapor line must be insulated with a mi...

Page 4: ...erant piping connections including the service port flare caps to be sure they are leak tight DO NOT OVERTIGHTEN between 40 and 60 inch lbs maximum 9 Evacuate the vapor line evaporator and the liquid line to 500 microns or less 10 Replace cap on service ports Do not remove the flare caps from the service ports except when necessary for servicing the system 11 Release the refrigerant charge into th...

Page 5: ...r line as follows a Hand tighten the 1 4 SAE nut to the Schrader fitting and an additional 1 3 turn to seal 7 Install the TXV bulb to the vapor line near the equalizer line using the bulb clamp s furnished with the TXV assembly Ensure the bulb is making maximum contact a Bulb should be installed on a horizontal run of the vapor line if possible On lines under 7 8 O D the bulb may be installed on t...

Page 6: ...Determine indoor coil adjustment if any from Tabular Data Sheet 3 Calculate the additional charge for lineset using the Tabular Data Sheet if line length is greater than 15 feet 4 6 m 4 Total system charge item 1 item 2 item 3 5 Permanently mark the unit data plate with the total amount of refrig erant in the system Using the charging charts The unit includes heating charging charts and cooling ch...

Page 7: ...out 5 ft above the floor where it will be exposed to normal room air circulation Do not place it on an outside wall or where it is exposed to the radiant effect from exposed glass or appliances drafts from outside doors or supply air grilles 6 Route the 24 volt control wiring NEC Class 2 from the outdoor unit to the indoor unit and thermostat Refrigerant charging should only be carried out by a qu...

Page 8: ...e airflow using the LED display on the CFM selection board FIGURE 8 Typical Field Wiring Air Handler Electrical Heat Three Phase FIGURE 9 Typical Field Wiring Air Handler Electrical Heat Single Phase THERMOSTAT INDOOR UNIT OUTDOOR UNIT LOW VOLTAGE TERMINAL BLOCK IN AIR HANDLER WITH ELECTRIC HEAT 3 4 DEFROST CONTROL 1 FIELD INSTALLED JUMPER GND SCREW CONTACTOR T2 T1 L2 L1 M R Y O W G T2 E 2 R R Y Y...

Page 9: ...hermostat demand to provide cooling as needed An attempt to start the compressor without at least 8 hours of crank case heat will damage the compressor TABLE 1 R 410A Saturation Properties Temp F Pressure PSIG Temp F Pressure PSIG Temp F Pressure PSIG Temp F Pressure PSIG Temp F Pressure PSIG 45 130 60 170 75 217 90 274 105 341 46 132 61 173 76 221 91 278 106 345 47 135 62 176 77 224 92 282 107 35...

Page 10: ...cause of a pressure switch lockout it will energize the X L output as shown in Table 3 The control has a three second delay between fault code flashes If the conditions above exist during cooling mode the system could be in the loss of charge condition DEFROST OPERATION Time Temperature Defrost 13 Seer 2 5 Ton The defrost control is a time temp control which includes a field select able tap locate...

Page 11: ...le Initiation The control will allow the heat pump to operate in the heating mode until the combination of outdoor ambient and outdoor coil temperatures indi cate that a defrost cycle is necessary The control will initiate a defrost cycle when the liquid line temperature is below the initiate point for the measured ambient temperature See Figure 13 continuously for 4 1 2 minutes This delay elimina...

Page 12: ...ollowing removal of the fault condition 1 Power is cycled to the R or Y inputs of the control This will cause the soft lockout condition to be reset when the thermostat is satisfied or when the thermostat is set to SYSTEM OFF and back to HEAT or COOL mode 2 The TEST terminals are shorted for more than two seconds When the soft lockout condition is reset the control will stop displaying the fault c...

Page 13: ...835961 UIM D 0213 Johnson Controls Unitary Products 13 SECTION VII WIRING DIAGRAM FIGURE 14 Wiring Diagram Single Phase Demand Defrost ...

Page 14: ...ANGE PNK PINK PUR PURPLE RED RED WHT WHITE YEL YELLOW BLK BLK BRN PNK YEL PNK HPS HTS LPS BRN PNK YEL PNK YEL PNK SEE UNIT INSTALLATION INSTRUCTIONS FOR LOW VOLTAGE TERMINATIONS COND FAN X L PUR RED DEFROST CONTROL BLK WHT BRN BLK REV VALVE YEL ORG RV R C Y O W W1 66 PRES SWITCH DFST T STAT M BRN PNK YEL PNK BLK GRY LS BLU DANGER SHOCK HAZARD TURN OFF ELECTRICAL POWER BEFORE SERVICING TO PREVENT P...

Page 15: ...OMPONENTS SHOWN IN DASH LINES ARE OPTIONAL WIRING MUST CONFORM TO NATIONAL AND LOCAL CODES IF ANY OF THE ORIGINAL WIRE SUPPLIED WITH THIS UNIT MUST BE REPLACED IT MUST BE REPLACED WITH 105 C THERMOPLASTIC OR ITS EQUIVALENT WHERE POWER SUPPLY HAS ONE 1 240 VOLT CONDUCTOR AND ONE 1 NEUTRAL CONDUCTOR CONNECT L2 OF CONTACTOR TO NEUTRAL FAN RELAY AND WIRES LABELED 460V ONLY USED ON 380 415V OR 460V 1 2...

Page 16: ... BLK 208 230 BRN PNK YEL PNK HPS HTS LPS BRN PNK YEL PNK YEL PNK SEE UNIT INSTALLATION INSTRUCTIONS FOR LOW VOLTAGE TERMINATIONS COND FAN X L PUR RED DEFROST CONTROL BLK WHT BRN BLK REV VALVE YEL ORG RV R C Y O W W1 66 PRESS SWITCH DFST T STAT M BRN PNK GRY BLK YEL 460V BLK 460V LS BLU DANGER SHOCK HAZARD TURN OFF ELECTRICAL POWER BEFORE SERVICING TO PREVENT POSSIBLE DAMAGE TO THE EQUIPMENT AND PO...

Page 17: ...835961 UIM D 0213 Johnson Controls Unitary Products 17 NOTES ...

Page 18: ...pplicable Electrical Line Voltage Outdoor Unit Model Outdoor Unit Serial Filter Thermostat Accessories Filter Location s Connections Per Installation Instructions and Local Codes Gas piping is connected if applicable Supply plenum and return ducts are connected and sealed Filter Size Vent system is connected if applicable Thermostat wiring complete Heat anticipator is set to the recommended value ...

Page 19: ...mp Cut Out Balance Point Defrost Curve Y2 Lock FFUEL Switch Point Hot Heat Pump Fill in the information ie ON OFF or the appropriate Value for the fields that apply to the defrost control board installed Run Time Time and Temperature board only 30 60 or 90 minutes Bonnet Sensor Present HEAT Refrigerant Charge and Metering Device TXV Fixed Orifice R 22 R 410A Oz 45s Elbows TXV Orifice Size Liquid L...

Page 20: ...edes 835961 UIM C 0712 York International Corp 5005 York Drive Norman OK 73069 Explain operation of system to equipment owner Explain the importance of regular filter replacement and equipment maintenance Owner Education Provide owner with the owner s manual Explain thermostat use and programming if applicable to owner Comments Section ...

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