Graco 918334, Instructions-Parts List Manual

Page: 17 / 86

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Installation
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.
2. Make electrical resistance checks for the compo-
nents. Refer to
Schematics
on page 67 for wiring
diagram information.
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
_
F).
Heaters for 3-Zone Control Panels
Zone Component Terminals
Value
Range
1 Follower 2L1 & 2L2 98 – 127
h
2L2 & 2L1
ohms
2 Dispense Hose 1532 &
1551
See
Technical
Data
supplied
w/Hose
3 Dispense Gun 1602 &
1621
See
Technical
Data
supplied
w/Gun
Heaters for 4-Zone Control Panels
Zone Component Terminals
Value
Range
1 Follower 3L1 & 3L3 98 – 127
h
3L2 & 3L3
ohms
2 Dispense Gun 1532 &
1551
See
Technical
Data
supplied
w/Gun
3 Dispense Hose 1602 &
1621
See
Technical
Data
supplied
w/Hose
4 Pump 5L1 & 5L2 187.2 ohms
" 24 ohms