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GNA-2538 R0
3.2. Control Box Assembly
Important
The power “IN” to the heater control box comes from the axial fan - this must be wired such that there
is no power to the heater unless the fan is running.
TRANSITION
HI LIMIT
(INSIDE BOX)
TERMINAL
BLOCK
FENWAL
CONTROL
BOARD
HEATER BODY
HI LIMIT
(INSIDE BOX)
POWER IN CABLE
(CONNECTED TO FAN)
AIRSWITCH
OPTIONAL
TRANSFORMER
LOCATION
ON/OFF
SWITCH
3A FUSE
INDICATOR
LIGHT
1.5A FUSE
AXIAL FAN HEATER – LP AND NG-FIRED HEATER