174
RT-SVX36G-EN
Maintenance
Table 59. Control settings and time delays
Control Description
Elec. Designation
Contacts Open
Contacts Closed
Compressor Circuit Breakers
20 - 130
1CB8 thru 1CB11
See
See
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
Honeywell
Sequencing Time Delay Relay
4DL5
4U18
4DL6
N.C. - timed to close
internal timing function
N.C. - timed to close
60 seconds
60 seconds
60 s 20%
Note:
The combustion airflow switch (4S25) differential is 0.02" - 0.08" wc.
Table 60. Compressor circuit breakers (1CB8 - 1CB11) electrical characteristics
Unit Size
Comp Designation
200 V
230 V
Must Hold
Must Trip
Must Hold
Must Trip
20
1A,1B
50.4
58
43.2
49.7
Hi Cap.
1A,1B
50.4
58
43.2
49.7
25
1A
50.4
58
43.2
49.7
1B
57.1
65.7
51.4
59.2
Hi Cap.
1A
50.4
58
43.2
49.7
1B
63.1
72.5
57.1
65.7
30
1A,1B
63.1
72.5
57.1
65.7
Hi Cap
1A
63.1
72.5
69.3
79.7
1B
57.1
65.7
59.4
68.3
40
1A,2A
38.1
43.8
37
42.5
1B,2B
45.5
52.3
38.7
44.5
Hi Cap
1A,1B,2A,2B
45.5
52.3
38.7
44.5
50
1A,2A, 1B,2B
50.4
58
43.3
49.7
Hi Cap
1A,2A,
50.4
58
43.3
49.7
1B,2B
57.2
65.7
51.4
59.2
55
1A,1B,2A,2B
57.2
65.7
51.4
59.2
60
1A,2A
57.1
65.7
51.4
59.2
1B,2B
63.1
72.5
57.1
65.7
Hi Cap
1A,1B,2A,2B
63.1
72.5
57.1
65.7
70
1A,1B,2A,2B
69.3
79.7
59.4
68.3
75
1A,2A
73.7
84.7
63.1
72.5
1B,2B
105.2
121
90.7
104.3
Hi Cap
1A,2A
73.7
84.7
63.1
72.5
1B,2B
105.2
121
90.7
104.3
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