Page 35
TABLE 12
TCA210H NORMAL OPERATING PRESSURES
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1
CIRCUIT 2
CIRCUIT 3
CIRCUIT 4
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F
170
77
173
80
172
80
168
80
75°F
197
78
198
81
197
81
193
81
85°F
223
79
225
82
225
82
221
82
95°F
255
81
255
83
257
83
252
83
105°F
289
83
287
84
293
85
287
85
115°F
329
85
323
86
333
87
327
87
TABLE 13
TCA240S NORMAL OPERATING PRESSURES
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1
CIRCUIT 2
CIRCUIT 3
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F
185
69
182
73
183
72
75°F
212
71
209
75
210
74
85°F
236
72
233
75
234
75
95°F
267
73
265
76
264
75
105°F
297
74
301
77
300
76
115°F
335
76
340
78
338
78
TABLE 14
TCA240H NORMAL OPERATING PRESSURES
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1
CIRCUIT 2
CIRCUIT 3
CIRCUIT 4
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F
179
75
181
79
174
79
176
79
75°F
207
76
208
81
203
79
204
80
85°F
239
78
238
82
233
80
234
81
95°F
272
80
270
83
266
83
266
83
105°F
307
83
303
84
301
84
300
85
115°F
351
85
342
85
343
86
342
86
TABLE 15
TCA300S NORMAL OPERATING PRESSURES
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1
CIRCUIT 2
CIRCUIT 3
CIRCUIT 4
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc.
+5
psig
Dis.
+10
psig
Suc
+5
psig
Dis.
+10
psig
Suc.
+5
psig
65°F
185
69
183
70
186
72
179
71
75°F
213
72
210
74
215
76
207
75
85°F
247
75
241
77
249
78
240
78
95°F
280
77
271
78
281
80
271
79
105°F
320
79
309
79
317
81
307
80
115°F
361
81
346
80
358
82
345
82
Charge Verification − Approach Method
1− Using the same thermometer, compare liquid temper-
ature to outdoor ambient temperature.
Approach Temperature = Liquid temperature minus
ambient temperature.
2− Approach temperatures should match values in table
16. An approach temperature greater than
this value
in-
dicates an undercharge. An approach temperature
less than
this value
indicates an overcharge.
3− Do not use the approach method if system pressures
do not match pressures in tables 9 through 15. The ap-
proach method is not valid for grossly over or under-
charged systems.
TABLE 16
APPROACH TEMPERATURES
Unit
Liquid Temp. Minus Ambient Temp.
1st Stage
2nd Stage
3rd Stage
4th Stage
180S
210S
240S
180H
7°F + 1
(3.9°C + 0.5)
7°F + 1
(3.9°C + 0.5)
7°F + 1
(3.9°C + 0.5)
NA
210H
9°F + 1
(5°C + 0.5)
7°F + 1
(3.9°C + 0.5)
8°F + 1
(4.4°C + 0.5)
8°F + 1
(4.4°C + 0.5)
240H
10°F + 1
(5.6°C + 0.5)
9°F + 1
(5°C + 0.5)
9°F + 1
(5°C + 0.5)
10°F + 1
(5.6°C + 0.5)
300S
14°F + 1
(7.8°C + 0.5)
12°F + 1
(6.7°C + 0.5)
12°F + 1
(6.7°C + 0.5)
12°F + 1
(6.7°C + 0.5)
V− SYSTEMS SERVICE CHECKS
A−Cooling System Service Checks
TCA units are factory charged and require no further adjust-
ment; however, charge should be checked periodically using
the approach method. The approach method compares actual
liquid temperature with the outdoor ambient temperature. See
section IV−CHARGING.
NOTE−When unit is properly charged discharge line pres-
sures should approximate those in tables 9 through 15.
VI−MAINTENANCE
CAUTION
Electrical shock hazard. Turn off power to unit be-
fore performing any maintenance, cleaning or
service operation on the unit.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
