GLOW T180 - Page 53

Glow T180
Tankless Condensing Water Heater
53
MICROFUSE
(NOT REPLACABLE)
FLUE SENSOR
PORT
REFRACTORY
STAINLESS STEEL
HEAT EXCHANGER
Figure 5.4 - Stainless Steel Heat Exchanger
5.6.2 Part Replacement:
Ignition and/or ame ionization electrodes:
1. Disconnect the voltage.
2. Un-Plug the electrode wires.
3. Remove the screws securing the electrodes in
place.
4. Remove the electrodes and check that the gaskets
are not damaged and replace if necessary.
5. Reconnect the wires and re-assemble the
components following the above procedure in
reverse order.
6. Switch on the power supply and restart the
appliance.
If the water heater does not restart,
check the positions of the electrodes
(especially the ignition electrode). Make sure
that original position and distances between
the electrodes and the burner are respected to
avoid a water heater malfunction).
Glow Brand will not be held responsible
for damage to any of the water heater’s
components caused by non-compliance
with this instruction.
Maintenance operations may require removal of the
water heater casing.
1. Disconnect the electrical 120 VAC plug.
2. Un-plug the ignition electrode and ame
detection wires from the ignition control unit.
3. Disconnect the joint and remove the pipe linking
the gas valve to the injector unit (venturi).
4. Disconnect the joint and remove the gas feed
pipe from the gas valve.
5. Unscrew the ring-nut at the bottom of the room-
sealed chamber and remove the gas valve.
6. Unscrew the nuts securing the burner unit
(consisting of a fan, manifold and burner) to the
heat exchanger.
7. Remove the burner assembly, paying particular
attention not to remove or damage the ceramic
ber.
8. Check that the burner is not affected by
deposits, scaling or excessive oxidation. Check
that all the holes in the burner are free.
9. Clean the electrodes carefully without altering
their positions with respect to the burner.
10. Clean the burner cylinder using a non-metal
brush and without damaging the ceramic ber.
11. Check the integrity of the gasket on the cover of
the burner.
12. Clean the heat exchanger using white vinegar or
a suitable cleaner for stainless steel. Distribute
the product on the spirals of the heat exchanger
using a brush. Do not wet the ceramic ber
coating. Wait a few minutes then remove the
deposits using a non-metal brush. Then remove
the residues under running water.
13. Remove the gear clamp and condensate trap
and clean by running under water.
14. Unscrew the joint to the condensate trap,
remove the trap and wash under running water.
15. With the cleaning completed, re-assemble the
components following the above procedure in
reverse order.
16. Finally, check the water heater to make sure that
all gas and exhaust joints are tight.