Graco Therm-O-Flow 55-H Instructions-Parts List Manual page 14

Heater Resistance Checks
WARNING
ELECTROCUTION HAZARD
To reduce risk of injury or damage to
equipment, conduct these electrical
checks with the main disconnect OFF.
To check heater resistance:
1. Make sure the power is off and that the disconnect
switch is in the OFF position.
Heaters
Zone Component
1 1 Follower Follower
2 Dispense Hose 1
3 Dispense Hose 2
4 Pump
5 Dispense Gun 1
6 Dispense Gun 2
14 310–534
Installation
Terminals
3L1 & 3L2 3L1 & 3L2 12.8 ohms 12.8 ohms
3 3L2 & 3L3 & 3 3
3L3 & 3L1 3L3 & 3L1
2002 & 1092 See Technical Data supplied w/Hose See Technical Data supplied w/Hose
2042 & 1092 See Technical Data supplied w/Hose See Technical Data supplied w/Hose
5L1 & 5L2 93.5 ohms
2022 & 1092 See Technical Data supplied w/Gun
2062 & 1092 See Technical Data supplied w/Gun
2. Make electrical resistance checks for the compo-
nents listed below. Refer to the appropriate wiring
diagrams.
Model: VAC:
C32428 240
C32429 480
3. Replace any parts whose resistance readings do
not comply with the ranges listed in the chart
below.
NOTE: Check resistance at ambient room tempera-
ture (63 – 77
Value Range
240 VAC
1.3 ohms 1.3 ohms 25.5 ohms 25.5 ohms
12 ohms 187.2 ohms
See Technical Data supplied w/Gun
See Technical Data supplied w/Gun
Pages:
60 – 64
66 – 70
F).
480 VAC
2.6 ohms 2.6 ohms
24 ohms