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Table 5-1
Control Settings and Time Delays
Control Description
Compressor Circuit Breakers
S*HF 20 - 60
S*HG 90 - 130
Combustion Airflow Switch
(Gas Heat Only)
High Limit Cutout
(Gas Heat Only)
Supply Airflow Switch
(Gas Heat Only)
Disch High Limit
(Electric Heat Only)
Linear High Limit
(Electric Heat Only)
Freezestat
(Hydronic Heat Only)
Gas Heat Units
Prepurge Timer:
Fenwall
Honeywell
Sequencing Time Delay Relay
Notes:
1. The combustion airflow switch (4S25) differential is 0.02" - 0.08" wc.
Table 5-2
Compressor Circuit Breakers (1CB8 - 1CB11 & 1CB14 - 1CB17) Electrical Characteristics
Unit
Compr.
Compr.
Size
Desig.
Size
20
A & B
9 ton
25
B
14 ton
A
9 ton
30
A & B
14 ton
40
1,2A & 1,2B
9 ton
50
1B, 2B
14 ton
1A, 2A
9 ton
55
1,2A & 1,2B
14 ton
60
1,2A & 1,2B
14 ton
70
1,2C
14 ton
1,2A & 1,2B
9 ton
75 Std.
1,2C
14 ton
1,2A & 1,2B
9 ton
75
1,2C
15 ton
Hi-Cap 1,2A & 1,2B
10 ton
90
1,2B & 1,2C
15 ton
1,2A
10 ton
105
1A,1B & 1C
15 ton
2A,2B & 2C
115
1,2C & 1,2D
15 ton
1,2A & 1,2B
10 ton
130
1,2C & 1,2D
14 ton
1,2A & 1,2B
Service & Maintenance
Elec. Designation
Contacts Open
1CB8 thru 1CB11
See Table 5-2
1CB14 thru 1CB17
See Table 5-2
4S25
4S26
4S38
0.03 - 0.12" wc
4S27
4S33
185 + 10 F (std./UL)
165 F + 10 F (CSA)
4S12
(N.O.) Auto Reset
4DL5
N.C. - timed to close
4U18
internal timing function
4DL6
N.C. - timed to close
200V
Must
Must
Must
Hold
Trip
Hold
51
58.7
51
76
87.4
76
51
58.7
51
76
87.4
76
51
58.7
51
76
87.4
76
51
58.7
51
76
87.4
76
76
87.4
76
76
87.4
76
51
58.7
51
76
87.4
76
51
58.7
51
76
87.4
76
51
58.7
51
76
87.4
76
51
58.7
51
76
87.4
76
76
87.4
76
51
58.7
51
76
87.4
76
100
Contacts Closed
see note 1
0.1 - 0.25" wc rise in press diff
250 + 15 F
0.15 + 0.05" wc rise in press diff
133 + 5 F
60 seconds + 20%
230V
460V
Must
Must
Must
Trip
Hold
58.7
22.2
87.4
33
58.7
22.2
87.4
33
58.7
22.2
87.4
33
58.7
22.2
87.4
33
87.4
33
87.4
33
58.7
22.2
87.4
33
58.7
22.2
87.4
33
58.7
22.2
87.4
33
58.7
22.2
87.4
33
87.4
33
58.7
22.2
87.4
33
See Table 5-2
See Table 5-2
210 F
110 + 5 F
145 F (std./UL)
125 F (CSA)
40 F
60 seconds
60 seconds
575V
Must
Must
Trip
Hold
Trip
25.5
17.7
20.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
38
26.4
30.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
38
26.4
30.4
25.5
17.7
20.4
38
26.4
30.4
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