Service & Maintenance - Trane IntelliPak WEHE Series Installation, Operation And Maintenance Manual

Service & Maintenance
Table 34. Control settings and time delays
Control Description
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
Note: The combustion airflow switch (4S25) differential is 0.02" - 0.08" wc.
RT-SVX35H-EN
Elec. Designation
4S25
4S26
4S38
4S27
185 + 10°F (std./cULus)
4S33
4S12
4DL5
4U18
4DL6
Contacts Open
see Note 1
250 + 15°F
0.03 - 0.12" wc
133 + 5°F
165 F + 10°F (cULus)
(N.O.) Auto Reset
N.C. - timed to close
internal timing function
N.C. - timed to close
Contacts Closed
0.1 - 0.25" wc rise in press diff
210°F
0.15 + 0.05" wc rise in press diff
110 + 5°F
145°F (std./cULus)
125°F (cULus)
40°F
60 seconds
60 seconds
60 seconds + 20%
99