Graco 333586E, Installation Manual

Page: 37 / 102

Check Resistance (Heated Systems)
333586E 37
Check Resistance (Heated Systems)
Check Sensor Resistance
NOTE: Instructions for checking sensor resistance
applies to heated systems only.
The package includes up to nine heat sensors and
controllers for each of the heated zones. To check
sensor resistance:
1. Turn the Power Junction Box Switch (AK) and the
Disconnect Switch (AZ) OFF.
2. Wait for components to cool down to ambient room
temperature 63°-77°F (17°-25°C). Check electrical
resistance for the components.
NOTE: Check resistance at ambient room temperature
63°-77°F (17°-25°C).
3. Replace any parts whose resistance readings do
not comply with the ranges listed in Table 1: Sen-
sors on page 38.
Check Heater Resistance
NOTE: Instructions for checking heater resistance
applies to heated systems only.
1. Turn the Power Junction Box Switch (AK) and the
Disconnect Switch (AZ) OFF.
2. Make electrical resistance checks for the compo-
nents.
3. Replace any parts whose resistance readings do
not comply with the ranges listed in Table 1: Sen-
sors on page 38.
To reduce risk of injury or damage to equipment,
conduct these electrical checks with the Power
Junction Box Switch (AK) and the Disconnect Switch
(AZ) OFF.
AMZ Pins
Circular Hose
Connector
First Heat Zone A, J
Second Heat Zone C, D
First RTD G, K
Second RTD M, K
Earth Ground B
To reduce risk of injury or damage to equipment,
conduct these electrical checks with the Power
Junction Box Switch (AK) and the Disconnect Switch
(AZ) OFF.