16
307363
Service
Replacing the Indicator Lamp
WARNING
All service to the heater must be performed by a
qualified electrician.
To reduce the risk of serious injury, including fluid
injection, burns, or electric shock, always shut off
the power to the heater, relieve fluid and air pres-
sure in the pump, and allow the fluid to cool before
servicing the heater.
1.
Unscrew the lens cap (49).
2.
Remove the lamp (47) and replace it with a new
lamp.
3.
Screw the lens cap onto the socket (50) until the
o–ring in the lens cap contacts the socket, then
turn the lens cap 1/2 to 1 turn more to ensure a
good seal.
WARNING
The terminals (46) on the ends of the indicator
lamp socket (50) are special, fused terminals. To
reduce the risk of fire or explosion which can result
in serious injury and property damage. Use only
original Graco replacement parts.
Fig. 11
1
2
4
46
46
4
48
22
50
48
47
49
Tighten onto socket (50) until seal in lens cap
contacts socket and then turn 1/2 to 1 turn more.
Tighten to contact housing (22) and then turn
1/8 to 1/4 turn more.
1
2
2
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