Page 22
TABLE 3
SPB036H4 Approach Values for Charging
Second Stage (High-Capacity)
SSB*H4S41Y through SSB*H4S43Y
Liquid Line Temperature
Outdoor Temperature
=
Approach Temperature
Model
SPB036H4S41
SPB048H4S41
SPB060H4S41
°F (°C)*
9 (5)
8 (4.4)
8 (4.4)
*F: +/−1.0°; C: +/−0.5°
TABLE 4
Normal Operating Pressures − Cooling
1
SSB*H4S41Y through SSB*H4S43Y
Model
SPB036H4S41
SPB048H4S41
SPB060H4S41
°F (°C)
2
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
First Stage (Low Capacity) Pressure
3
65 (18.3)
225
144
235
144
225
138
75 (23.9)
261
147
268
145
264
141
85 (29.4)
302
149
310
147
305
142
95 (35.0)
349
151
356
148
352
146
105
(40.6)
397
153
407
150
405
148
115
(46.1)
461
157
466
152
459
150
Second Stage (High Capacity) Pressure
3
65 (18.3)
239
139
244
140
241
134
75 (23.9)
278
141
283
141
280
136
85 (29.4)
322
143
326
144
324
137
95 (35.0)
367
146
374
147
373
138
105
(40.6)
426
148
427
148
425
142
115
(46.1)
489
151
491
151
486
146
1
These are most−popular−match−up pressures. Indoor match up,
indoor air quality, and indoor load cause pressures to vary.
2
Temperature of the air entering the outdoor coil.
3
Liquid ±10 and Vapor ±5 psig.
TABLE 5
Normal Operating Pressures − Heating
1
SSB*H4S41Y through SSB*H4S43Y
Model
SPB036H4S41
SPB048H4S41
SPB060H4S41
°F (°C)
2
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
First Stage (Low Capacity) Pressure
3
40 (4.4)
328
98
369
75
351
63
50 (10)
333
118
366
114
335
92
Second Stage (High Capacity) Pressure
3
20 (−7.0)
296
62
311
58
308
59
30 (−1.0)
309
75
334
72
323
70
40 (4.4)
322
92
354
89
318
69
50 (10)
336
113
381
108
329
82
1
These are most−popular−match−up pressures. Indoor match up,
indoor air quality, and indoor load cause pressures to vary.
2
Temperature of the air entering the outdoor coil.
3
Liquid ±10 and Vapor ±5 psig.
C − Charging SSB*H4S44Y
TESTING AND CHARGING SYSTEM
This system uses HFC−410A refrigerant which operates at
much higher pressures than HCFC−22. The pre−installed
liquid line filter drier is approved for use with HFC−410A
only. Do not replace it with components designed for use
with HCFC−22. This unit is NOT approved for use with coils
which use capillary tubes as a refrigerant metering device.
COOLING MODE INDOOR AIRFLOW CHECK
Check airflow using the Delta−T (
D
T)
process using the il-
lustration in figure 23.
HEATING MODE INDOOR AIRFLOW CHECK
Blower airflow (CFM) may be calculated by energizing elec-
tric heat and measuring:
Temperature rise between the return air and supply air
temperatures at the indoor coil blower unit,
Measuring voltage supplied to the unit,
Measuring amperage being drawn by the heat unit(s).
Then, apply the measurements taken in following formula
to determine CFM:
CFM =
Amps x Volts x 3.41
1.08 x Temperature rise (F)
CALCULATING CHARGE
If the system is void of refrigerant, first, locate and repair
any leaks and then weigh in the refrigerant charge into the
unit. To calculate the total refrigerant charge:
Amount
specified on
nameplate
Adjust amount. for variation
in line set length listed on
table in figure 24.
Additional charge
specified per indoor unit
match−up listed in tables
6 through 8.
Total
charge
+
+
=
