Combustion Blower; Burner; Burner Removauinspection; Adjustments/Replacements Of Components - Nortec GH Series Instaliation, User & Maintenance Manual

during on/off cycles, and settles to the bottom of the
tank. A scale accumulation of up to 2" thick on each
side of the bottom of the tank will not affect operation
of the GH unit
It is recommended that the tank and float chamber
be cleaned at least once every season to maintain
optimum operation. It may be necessary for more
frequent "flushes" in areas of hard water or prolonged
annual usage. To "flush" the unit, see "Draining The
Tank" section of this manual.
To clean tank, remove steam and condensate
lines and remove lid. Lid is held down by keyed lock
at rear lip. Remove tank lid by removing hold down
knobs or nuts being careful to not damage the
insulation or gasket.
To remove loose scale, simply scoop it out or flush
to drain. Scale adhering to the tank or combustion
chamber walls can be removed with a scraper such as
a plastic windshield scraper. Do not use a metal
scraper or scoop that will scratch the stainless steel
surfaces of the tank.
Flush remaining scale from reservoir with clean
water. Be careful not to allow scale to clog the drain
line and traps.
Reassemble in reverse order, making sure tank
cover gasket is intact. Do not over-tighten cover bolts.
Cleaning the float chamber is accomplished by
removing the hold down screws to access the floats
and using a small brush to gently clean the scale from
the floats, stem and chamber. Ensure that float
operation is smooth and gasket is properly seated
before tightening screws on float chamber.
COMBUSTION BLOWER
The combustion air blower motors are
permanently lubricated and require no other
maintenance.
BURNER
The burners are made of ceramic fabric material
and operate in the infrared mode. Depending on the
environment, the burner(s) may require removal of lint
or grease-laden dust periodically. This may be
achieved by removing the burner and applying
pressurized air to the external surface of the material.
Refer to the Servicing Section related to burner
removal.
- 15 -
BURNER REMOYAUINSPECTION
1 . Shut off electrical power and gas supply to the
appliance.
2. Disconnect wiring to hot surface igniter and
flame sensor and remove. See section on
removal of these components.
3. Remove blower. See Blower Removal
Section.
4. Remove (5) burner flange mounting bolts.
5. Gently remove the burner assembly from the
appliance being careful not to damage the
burner material.
6. To reinstall, reverse above procedure and
ensure that flange gasket is not damaged and
a good seal is maintained. If necessary
replace the gaskets.
7. Always test for leaks after any service has
been performed on the gas train
as there is
an explosive gas mixture present downstream
of the combustion blower.
ADJUSTMENTS/REPLACEMENTS OF
COMPONENTS
DANGER .. SHOCK HAZARD - Make sure
electrical power to the appliance is disconnected to
avoid potential serious injury or damage to
components.
Gas Valve Replacement
1. Shut off electrical power and gas supply to the
appliance.
2. Remove gas piping to gas valve inlet.
3. Remove front door and right side panel.
4. Disconnect wiring connections to gas valve.
5. Unthread gas valve from outlet.
6. Reverse above procedure to re-install.
Hot Surface Igniter Replacement
NOTE: Replacement igniters must be supplied by
NORTEC or damage to the unit may occur.
1. Shut off electrical power and gas supply to the
appliance.
2. Disconnect wiring leads to the igniter.