Installation Manual

12
EEM Motor
Adjust the CFM by changing the 24V low voltage lead at the speed
terminal block on the motor. (T1-Low Speed, T2 and T3-Medium
Speed, T4 and T5-High Speed).
REFRIGERANT CHARGE C HECKS
After completing airflow measurements and adjustments, the unit’s
refrigerant charge must be checked. All package units are charged
to the superheat method at the compressor suction line (for fixed
orifice devices). After superheat is adjusted it is recommended to
check unit sub-cooling at the condenser coil liquid line out. For
charge adjustments, see superheat and subcooling charts shown
for each model.
SUPERHEAT CAN BE DETERMINED AS FOLLOWS:
1. Read suction pressure. Determine Saturated Suction
Temperature from tables or pressure gauge saturated
temperature scale (R-410A).
2. Read suction line temperature.
3. Use the following formula:
SUPERHEAT = SUCTION LINE TEMP - SAT. SUCTION TEMP
SUCTION PRESSURE
SATURATED SUCTION
TEMPERATURE ºF
PSIG R-410A
50 1
52 3
54 4
56 6
58 7
60 8
62 10
64 11
66 13
68 14
70 15
72 16
74 17
76 19
78 20
80 21
85 24
90 26
95 29
100 31
110 36
120 41
130 45
140 49
150 53
160 56
170 60
SATURATED SUCTION PRESSURE
TEMPERATURE CHART
Suction Pressure Temperature (R-410A)
SUBCOOLING = SAT. LIQUID TEMP. - LIQUID LINE TEMP.
LIQUID PRESSURE
SATURATED LIQUID
TEMPERATURE ºF
PSIG R-410A
200 70
210 73
220 76
225 78
235 80
245 83
255 85
265 88
275 90
285 92
295 95
305 97
325 101
355 108
375 112
405 118
415 119
425 121
435 123
445 125
475 130
500 134
525 138
550 142
575 145
600 149
625 152
SATURATED LIQUID PRESSURE
TEMPERATURE CHART
Liquid Pressure Temperature (R-410A)
Models # Superheat ± 2°F Subcooling ± 2°F
*PC1424M41 10 ---
*PC1430M41 10 ---
*PC1436M41 3 ---
*PC1442M41 6 ---
*PC1448M41 2 ---
*PC1460M41 12 14
*PH1424M41 7 10
*PH1430M41 7 11
*PH1436M41 10 9
*PH1442M41 10 12
*PH1448M41 7 11
*PH1460M41 12 11
DESIGN SUPERHEAT / SUBCOOLING
@ 95°F OUTDOOR AMBIENT TEMPERATURE