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