
13
4-3 Electrical schematics for the 2 stages gas air heaters and ACGV
TV
Blowing fan
RFP
Pilot wire receiver
Limit
Excess heat airstat with manual reset
Fan
Fan triggering airstat
Reg
Burner regulation airstat
Mod
Burner modulator airstat (modulation option)
CC
Inspection box
MVE
Smoke extractor
PA
Burner air pressure switch
SI
Ionisation sensor
EA
Ignition electrode
MOD
Gas modulating valve (2 speed option)
EVG
Gas solenoid valve
TI
Isolation transformer
Under normal operation, never stop the device by cutting off the electrical power. Wait for
the fan to stop
Phase/ brown
Neutral/ blue
Earth/ green- yellow
Pilot/ black
Supply connector
Burner reset
Burner defect
Burner connector
Pilot wire receiver card
Fan connection