Replacing Heater Bands And Sensors In Pump Module - Graco Therm-O-Flow 20 Instructions - Parts Manual

Replacing Heater Bands and Sensors in Pump Module

Module heaters and sensor can be serviced without
removing the pump module from the supply unit.
Remove the front shrouds. When finished servicing the
pump module re-attach shrouds.
This procedure can be done when the
Therm-O-Flow 20 is cool.
Removing/Replacing Heater Band
1. Turn OFF the main electrical disconnect.
2. Remove the screws that hold the front shroud in
place and remove the front shroud.
3. Disconnect the electrical wires from heater band
(117). See F . 24. Label wires as they are
IG
removed.
4. Remove the screw that holds the heater band in
place.
5. Remove the heater band from pump.
6. Coat the inside of the heater with non silicone heat
sink compound before mounting. Maximum thick-
ness is 0.005". Coat only to within 3/4 in. (19 mm) of
vertical ends.
7. Install a new heater band in the same location as
the old heater band:
a. Locate heater terminals so they line up with
back of pump.
b. Tighten the heater band.
8. Re-connect heater wires and re-attach ceramic
caps that insulate terminal.
311976K
Removing/Replacing RTD Sensor
1. Turn OFF the main electrical disconnect.
2. Remove the screws that hold the front shroud in
place and remove front shroud.
3. Disconnect quick connect terminal.
4. Loosen the clamp holding sensor on pump (G). See
F . 24.
IG
5. Reconnect sensor to extension wire.
6. Replace the sensor in clamp:
a. Place sensor approximately 30° counterclock-
wise from pump outlet.
b. Tighten clamp.
G
117
F . 24
IG
Service
117
TI8144A
45