Sequence Of Operation; Maintenance - Payne PH3A Installation Instructions Manual

MEASURED
LIQUID PRESSURE
6 ( --- 14)
(psig)
°F
189 60
195 62
202
64
208
66
215 68
222 70
229 72
236 74
243 76
251 78
259 80
266 82
274 84
283 86
291 88
299 90
308
92
317
94
326 96
335 98
345 100
354 102
364 104
374 106
384 108
395 110
406 112
416 114
427 116
439 118
450
120
462
122
474 124
486 126
499
128
511
130

SEQUENCE OF OPERATION

A. COOLING MODE
On a call for cooling, the thermostat makes circuits R- -O, R- -Y, and
R- -G. Circuit R- -O energizes reversing valve, switching it to
cooling position. Circuit R- -Y energizes contactor, starting outdoor
fan motor and compressor. Circuit R- -G energizes indoor unit
blower relay, starting indoor blower motor.
When thermostat is satisfied, its contacts open, de- -energizing
contactor and blower relay. Compressor and motors stop.
NOTE: If indoor unit is equipped with a time- -delay relay circuit,
the blower runs an additional length of time to increase system
efficiency (applies to both cooling and heating modes).
B. HEATING MODE
On a call for heating, the thermostat makes circuits R- -Y and R- -G
(circuit R- -O is NOT made, and the reversing valve stays in the
de- -energized, heating position). Circuit R- -Y energizes contactor,
starting outdoor fan motor and compressor. Circuit R- -G energizes
indoor blower relay, starting blower motor. If the room temperature
continues to fall, circuit R- -W2 is made through the second- -stage
room thermostat bulb. Circuit R- -W2 energizes a sequencer,
bringing on the first bank supplemental electric heat and providing
electrical potential to the second heater sequencer (if used). If
outdoor temperature falls below the setting of the outdoor
thermostat (field- -installed option), contacts close to complete the
circuit and bring on the second bank of supplemental electric heat.
When the thermostat is satisfied, its contacts open, de- - energizing
contactor, blower relay, and sequencer. Compressor, motors, and
heaters stop.
Table 2—R- -410A Required Liquid Line Temperature
RATING PLATE (REQUIRED) SUBCOOLING TEMPERATURE _F (_C)
8 ( --- 13)
°C °F °C °F
16 58 14 56
17 60 16 58
18 62 17 60
19 64 18 62
20 66 19 64
21 68 20 66
22 70 21 68
23 72 22 70
24 74 23 72
26 76 24 74
27 78 26 76
28 80 27 78
29 82 28 80
30 84 29 82
31 86 30 84
32 88 31 86
33 90 32 88
34 92 33 90
36 94 34 92
37 96 36 94
38 98 37 96
39 100 38 98
40 102 39 100
41 104 40 102
42 106 41 104
43 108 42 106
44 110 43 108
46 112 44 110
47 114 46 112
48 116 47 114
49 118 48 116
50 120 49 118
51 122 50 120
52 124 51 122
53 126 52 124
54 128 53 126
10 ( --- 12) 12 ( --- 11)
°C °F °C
13 54 12
14 56 13
16 58 14
17 60 16
18 62 17
19 64 18
20 66 19
21 68 20
22 70 21
23 72 22
24 74 23
26 76 24
27 78 26
28 80 27
29 82 28
30 84 29
31 86 30
32 88 31
33 90 32
34 92 33
36 94 34
37 96 36
38 98 37
39 100 38
40 102 39
41 104 40
42 106 41
43 108 42
44 110 43
46 112 44
47 114 46
48 116 47
49 118 48
50 120 49
51 122 50
52 124 51

MAINTENANCE

Condensate Drain
During the cooling season, check monthly for free flow of drainage
and clean if necessary.
Cleanliness
These tips will help keep the air conditioner looking better and
working more efficiently:
1. Free flow of air is essential. Keep fences, shrubs, trash cans,
and other obstructions at least 18 inches (457 mm) from all
coil inlets.
2. Keep the coil free of grass clippings, leaves, weeds, and
other debris.
NOTE: Coil may occasionally require cleaning with a
liquid solution. The coil must be cold when cleaning. Use
an alkaline based cleaner only. Cleaning a hot coil or using
an acid based cleaner will remove the paint from the fins
and may clog the coil.
3. Never use a weather cover over the outdoor unit unless it is
a ventilated type or made of breathable fabric that will allow
moisture to evaporate rapidly. A cover that holds moisture
in the unit will cause more rust build- -up and damage than
normal exposure to weather.
8
14 ( --- 10) 16 ( --- 9)
°F °C °F
52 11 50
54 12 52
56 13 54
58 14 56
60 16 58
62 17 60
64 18 62
66 19 64
68 20 66
70 21 68
72 22 70
74 23 72
76 24 74
78 26 76
80 27 78
82 28 80
84 29 82
86 30 84
88 31 86
90 32 88
92 33 90
94 34 92
96 36 94
98 37 96
100 38 98
102 39 100
104 40 102
106 41 104
108 42 106
110 43 108
112 44 110
114 46 112
116 47 114
118 48 116
120 49 118
122 50 120
°C
10
11
12
13
14
16
17
18
19
20
21
22
23
24
26
27
28
29
30
31
32
33
34
36
37
38
39
40
41
42
43
44
46
47
48
49