Repair
Repair Primary Heater
Replace Heater Element
1. Press to stop the pumps.
2. Turn off heat zones.
3. Flush pum
p.
4. Press
to park the pumps in the down position.
The park operation is complete when green dot
goes out. Verify the park operation is complete
before moving to next step.
5. Press to deactivate the system.
6. Turn main power switch off.
7. Re
lieve pressure. See
Pr
essure Relief Procedure, page 49.
8. Wait for heater to cool.
9. Remove four bolts (23) and shroud (10).
10. Remove screw (20) and lower din rail cover (48).
11. Disconnect heater wires:
a. A Side: Disconnect A side heater wires,
transformer, and transformer fan wires from
lower din rail (33).
b. B Side: Disconnect B side heater wires and
remove lower din rail (33) from B side heater
(5).
12. Test heater wires with ohmmeter.
System
Total
Heater
Wattage
Element
Ohms
E-30 (10
kw)
10,200 2,550 18–21 per
element
E-XP2,
E-30 (15
kw)
15,300 2,550 18–21 per
element
NOTICE
To prevent a short circuit or lowering the
transformer life, do not splash fluid on
transformer. Cover transformer with a plastic
sheet or piece of cardboard.
333024N 67
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