Graco Therm-O-Flow 20, Инструкция - Каталог запасных частей

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Installation
10 309858K
Check Resistance
.
Supply Unit
Have a qualified electrician check resistance between
each supply unit component and true earth ground. The
resistance must be less than 0.25 ohms. If the resis-
tance is greater than 0.25 ohms, a different ground site
may be required. Do not operate the system until the
problem is corrected.
Sensor
.
The supply unit includes either three or four heat sen-
sors and controllers for each heated zone. To check
sensor resistance:
1. Make sure the power is off and the disconnect
switch is turned to OFF.
2. Check electrical resistance of the components at
ambient room temperature 63
°
-77
°
F (17°-25° C).
Refer to Electrical Schematic for your electrical
control, pages 48-55.
3. Replace any parts whose resistance readings do
not comply with the ranges in the chart below.
3-Zone RTD Sensors
4-Zone RTD Sensors
Heater
.
To check heater resistance:
1. Make sure the power is off and the disconnect
switch is set to OFF.
2. Check electrical resistance checks of the compo-
nents at ambient room temperature (63
°
-77
°
F).
Refer to Electrical Schematic for your electrical
control, pages 48-55.
3. Replace any parts whose resistance readings do
not comply with the ranges in the chart below.
Heaters for 3-Zone Control Panels
WARNING
The system must be properly grounded. See Ground-
ing, page 8.
WARNING
• Read warnings, page 4.
• Do not open electrical control panel unless you
are a trained professional.
• Make sure power is shut off to the control panel.
• Make sure main disconnect is OFF.
Zone Component Terminals Value Range
1 Follower 1311, 1321 108 ± 2% ohms
2 Dispense Hose 1531, 1541 108 ± 2% ohms
3 Dispense Gun 1601, 1611 108 ± 2% ohms
Zone Component Terminals Value Range
1 Follower 1311, 1321 108 ± 2% ohms
2 Dispense Hose 1531, 1541 108 ± 2% ohms
3 Dispense Gun 1601, 1611 108 ± 2% ohms
4 Pump 1381, 1391 108 ± 2% ohms
WARNING
• Read warnings, page 4.
• Make sure main disconnect is OFF.
Zone Component Terminals Value Range
1 Follower 2L1, 2L2 98-127 ohms
2L2, 2L1
2 Dispense
Hose 1532, 1551 See Technical
Data supplied
with hose
3 Dispense
Gun 1602, 1621 See Technical
Data supplied
with gun