THP-400A, THP-500A and THP-550 Installation and Service Manual
Component Identification
AM-01 amplifier SN-01 low-temperature sensor TS-05 cabinet high-temperature limit
FU-01 main fuse SN-02 flame rod TS-07 low-temperature limit switch
FU-02 control fuse ST-01 motor starter TS-08 remote-discharge temperature
LI-01 low-temperature light SW-06 burner switch TS-11 room-override thermostat
LI-02 burner reset light SW-07 blower switch VA-01 main-gas valve
MT-01 supply-blower motor TR-02 low-voltage transformer VA-02 2nd main-gas valve
PS-01 air flow switch TS-01 discharge-air sensor VA-03 pilot-gas valve
RE-07 flame-safety relay TS-04 high-temperature limit switch VA-05 modulating gas valve
Wiring—THP-550
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