Thermo Products R-410A installation manual Section IX System START-UP, Energize Crankcase Heater

835961-UIM-D-0213

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.

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

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.

TABLE 1: R-410A Saturation Properties

Temp °F	Pressure	Temp °F	Pressure	Temp °F	Pressure	Temp °F	Pressure	Temp °F	Pressure
	PSIG		PSIG		PSIG		PSIG		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

CHARGE COMPENSATOR

(Empty in cooling / full in heating)

(Not included in all Units)

OUTDOOR

COIL

FIELD CONNECTED LINE

4-WAY REVERSING VALVE

FILTER DRYER (Solid core)

INDOOR COIL

LIQUID

SENSOR

SUCTION	COMPRESSOR
ACCUMULATOR
BI-FLOW		BI-FLOW
TXV/CHECK		TXV/CHECK
VALVE OR ORIFICE (Heating)		VALVE (Cooling) **

FIGURE 10: Heat Pump Flow Diagram

Johnson Controls Unitary Products 9