361813-UIM-A-0208
Unitary Products Group
13
SECTION VIII: SYSTEM OPERATION
For more information on the control operation, refer to “Operation
Instructions - DEMAND DEFROST CONTROL BOARD in this Booklet.
REQUIRED CONTROL SETUP
IMPORTANT: The following steps must be taken at the time of
installation to insure proper system operation.
1.
Consult system wiring diagram to determine proper wiring for
proper system configuration.
2.
If hot heat pump configuration is desired, change HOT HEAT
PUMP jumper to ON position.
3.
If installation includes a fossil fuel furnace, change FFUEL jumper
to ON position.
4.
Set low temperature cutout (LTCO) and balance point (BP) jump-
ers as desired.
5.
Verify proper system functionality. Confirm room thermostat opera-
tion including fault code display capability.
6.
Upon completion of installation, verify that no fault codes are
stored in memory. Clear the fault code memory if necessary.
DEFROST OPERATION
The following defrost curve selection jumper positions are set from fac-
tory.
INDICATIONS OF PROPER OPERATION
Cooling
Cooling operation is the same as any conventional air conditioning unit.
1.
The outdoor fan should be running, with warm air being dis-
charged from the top of the unit.
2.
The indoor blower (furnace or air handler) will be operating, dis-
charging cool air from the ducts. Coils or other parts in the air cir-
cuit should be cleaned as often as necessary to keep the unit
clean. Use a brush, vacuum cleaner attachment, or other suitable
means.
3.
The vapor line at the outdoor unit will feel cool to the touch.
4.
The liquid line at the outdoor unit will feel warm to the touch.
Heating
Indications of proper Heating operation is as follows:
1.
The outdoor fan should be running, with cool air being discharged
from the top of the unit.
2.
The indoor blower (furnace or air handler) will be operating, dis-
charging warm air from the ducts.
3.
The vapor line at the outdoor unit will feel warm to the touch.
4.
The liquid line at the outdoor unit will feel cool to the touch.
SECTION IX: INSTRUCTING THE OWNER
Assist owner with processing warranty cards and/or online registration.
Review Owners Guide and provide a copy to the owner and guidance
on proper operation and maintenance. Instruct the owner or the opera-
tor how to start, stop and adjust temperature setting.
When applicable, instruct the owner that the compressor is equipped
with a crankcase heater to prevent the migration of refrigerant to the
compressor during the “OFF” cycle. The heater is energized only when
the unit is not running. If the main switch is disconnected for long peri-
ods of shut down, do not attempt to start the unit until 8 hours after the
switch has been connected. This will allow sufficient time for all liquid
refrigerant to be driven out of the compressor.
The installer should also instruct the owner on proper operation and
maintenance of all other system components.
MAINTENANCE
1.
Dirt should not be allowed to accumulate on the outdoor coils or
other parts in the air circuit. Clean as often as necessary to keep
the unit clean. Use a brush, vacuum cleaner attachment, or other
suitable means.
2.
The outdoor fan motor is permanently lubricated and does not
require periodic oiling.
3.
If the coil needs to be cleaned, it should be washed with Calgon
Coilclean (mix one part Coilclean to seven parts water). Allow
solution to remain on coil for 30 minutes before rinsing with clean
water. Solution should not be permitted to come in contact with
painted surfaces.
4.
Refer to the furnace or air handler instructions for filter and blower
motor maintenance.
5.
The indoor coil and drain pan should be inspected and cleaned
regularly to prevent odors and assure proper drainage.
TABLE 1:
Defrost Initiate Curves
Defrost Curve Selection
Jumper Position
1
2
3
4
Heat Pump Model
2-Ton
2.5-Ton
4-Ton
5-Ton
3-Ton
3.5-Ton
1.5-Ton
IT IS UNLAWFUL TO KNOWINGLY VENT, RELEASE OR DIS-
CHARGE REFRIGERANT INTO THE OPEN AIR DURING
REPAIR, SERVICE, MAINTENANCE OR THE FINAL DIS-
POSAL OF THIS UNIT.
WHEN THE SYSTEM IS FUNCTIONING PROPERLY AND
THE OWNER HAS BEEN FULLY INSTRUCTED, SECURE
THE OWNER’S APPROVAL.
TABLE 2:
R-22 Saturated Properties
Pressure
PSIG
Temp °F
Pressure
PSIG
Temp °F
Pressure
PSIG
Temp °F
Pressure
PSIG
Temp °F
Pressure
PSIG
Temp °F
Pressure
PSIG
Temp °F
80
48
110
64
140
78
170
91
200
101
230
111
82
49
112
65
142
79
172
91
202
102
232
112
84
50
114
66
144
80
174
92
204
103
234
112
86
51
116
67
146
81
176
93
206
103
236
113
88
52
118
68
148
82
178
94
208
104
238
114
90
54
120
69
150
83
180
94
210
105
240
114
92
55
122
70
152
84
182
95
212
105
242
115
94
56
124
71
154
84
184
96
214
106
244
115
96
57
126
72
156
85
186
97
216
107
246
116
98
58
128
73
158
86
188
97
218
107
248
117
100
59
130
74
160
87
190
98
220
108
250
117
102
60
132
75
162
88
192
99
222
109
252
118
104
61
134
76
164
88
194
99
224
109
254
118
106
62
136
77
166
89
196
100
226
110
256
119
108
63
138
78
168
90
198
101
228
111
258
119
