York YHJF060, Installation Manual

Page: 9 / 12

538605-UIM-B-1009
Johnson Controls Unitary Products 9
SECTION VIII: 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 POSI-
TION:
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 thermo-
stat cooling contact through blower relay to provide blower opera-
tion.
4. System will cycle with thermostat demand to provide cooling as
needed.
An attempt to start the compressor without at least 8 hours of
crankcase 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 92 282 107 350
48 137 63 179 78 228 93 287 108 355
49 140 64 182 79 232 94 291 109 360
50 142 65 185 80 235 95 295 110 365
51 145 66 188 81 239 96 299 111 370
52 147 67 191 82 243 97 304 112 375
53 150 68 194 83 247 98 308 113 380
54 153 69 197 84 250 99 313 114 385
55 156 70 201 85 254 100 317 115 391
56 158 71 204 86 258 101 322 116 396
57 161 72 207 87 262 102 326. 117 401
58 164 73 211 88 266 103 331 118 407
59 167 74 214 89 270 104 336 119 412
FIGURE 9: 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)