Replace Mzlp Fuse - Graco Therm-O-Flow 20 Instructions - Parts Manual

2. Remove the screws that hold the front shroud in
place and remove the front shroud.
3. If the sensor wire is connected to the electrical
enclosure, disconnect it.
4. Loosen the clamp (321) holding the sensor on the
Pump.
5. Tie the leads of the new sensor (320) to the old
sensor and remove the old sensor. The leads of the
new sensor will be easily drawn through the conduit
for reconnecting.
6. Replace the sensor (320) in the clamp (321):
a. Place the sensor approximately 30° counter
clock-wise from the Pump outlet.
b. Tighten the clamp (321).
7. Re-connect the sensor wire to the electrical
enclosure.

Replace MZLP Fuse

Each MZLP module comes with the following fuses:
F . 31: Fuse Locations
IG
Fuse Kit Fuse
24V289 F1, F2
F3-F10
Spare fuse kit included with system.
334129S
Part
250VAC, 25A, long, white
ceramic
250VAC, 8A, fast acting, clear
glass
NOTICE
To prevent system damage, always use fast acting
fuses. Fast acting fuses are required for
short-circuit protection.
1. Turn the Main Power Switch OFF.
2. Open electrical enclosure door.
3. Use a proper non-conductive fuse puller tool to
remove the blown fuse.
NOTICE
Using an improper tool, such as screw drivers or
pliers, may break the glass on the fuse.
NOTE: F1 and F2 are white ceramic and indicate 25A
on the barrel.
NOTE: F3-F10 are clear glass and indicate 8A on the
barrel.
4. Use a proper non-conductive fuse puller tool to
install the new fuse.
NOTICE
Using an improper tool, such as screw drivers or
pliers, may break the glass on the fuse.
5. Close the electrical enclosure.
Repair
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