Heat Exchanger Replacement - Nortec GH Series Installation, User & Maintenance Manual

13. Remove nuts which hold tank mount brackets 13.
14. Disconnect the left end tank brackets from the
frame.
15. Carefully slide tank out the left end of the
casing.
16. Reverse procedure to replace tank. Inspect
heat exchanger gasket to ensure it is not
damaged. Tighten the nuts to 75 in lbs.

Heat Exchanger Replacement

1. 1. Drain water from unit. See section "Draining
the Tank".
2. 2. Switch off power to the unit and open front and
right doors.
3. 3. Shut off gas supply to the unit.
4. 4. Remove gas train as described under Gas
Valve Replacement on page 19.
5. 5. Disconnect wire harness at blower, ignition
module, air proving.
6. 6. Disconnect vent connection to the unit.
7. 7. Remove exhaust manifold.
8. 8. Remove heat exchanger nuts.
9. 9. Slide heat exchanger out.
10. 10. Re-assemble in reverse order. Inspect all
gaskets to ensure that they are not damaged.
(Exhaust manifold gasket and burner gasket
must be replaced; clean surfaces from any
leftovers.)
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