Wiring Diagram - BENSON RS UHA Assembly And Use Manual

WIRING DIAGRAM SINGLE AND TWO STAGE
Type 1-2-3-4-5
SND
LF
LL
LB
RST
SE
KEY
SND Temperature probe
TR Regulatory control thermostat (auto reset)
LM LIMIT thermostat (Manual reset)
EVG1-I° Gas solenoid valve 1
EVG1-II° Second stage gas valve 1 (Two Stage
version only)
C Fan capacitor
FAN 1 Axial fan 1
FAN 2 Axial fan 2 (type 5)
F1-F2 Line fuses
LF Green working light
LL High temperature indication light
LB Lockout indication
RST Lockout reset
EF Flue venter
TR
LM
J9 J12
EF
C
FAN 1
N
F1
F2
NA NC
COM COM
PA
PA Differential pressure switch
IGN1 Ignition transformer
EA1 Spark electrode
ION Ionisation probe
SE Electrical control board
IMT (*) Fused isolator
MS (*) Fire damper connection (accessory)
RSTR (*) Remote reset connection
TA (*) Room thermostat connection
VM (*) Fan switch connection
SF (*) Second stage gas valve connection
(*) External to the heater customer supply
10
C
FAN 2
I°
II°
SF
IMT
MS
RSTR
TA
VM
IGN1
EA1
ION