Page 12
LAARS HEATING SYSTEMS
Figure 11. Manual gas shutoff.
Figure 12. Gas orifice union.
2.
Check the condition of the internal vent fittings
and hose and replace as necessary.
3.
Check the condensate drain lines for blockage
and optional condensate pump for proper
operation.
5E. Cleaning Combustion Chamber Coil
and/or Burner
Note:
In normal operation this procedure is
seldom required. Should it prove necessary, the
following procedure is used to access the coil for
cleaning (see Figure 14).
1.
Turn off the gas and electrical power to unit and
remove covers to the unit.
2.
Remove water heater plastic exhaust assembly
by undoing the four nuts that hold the plastic
flange to the lower head. Disconnect one or more
of the rubber vent couplings above the tee, and
pull the elbow and tee out from under unit.
3.
Shut off water to the system and disconnect and
remove the water inlet connection.
4.
Separate the union on the economizer pipe and
remove the lower half of the union from the
economizer outlet.
5.
Undo the four economizer retainer nuts. (see
Figure 14). Remove the boiler drain valve.
6.
Undo the four clamps that hold the outer shroud
to the upper head. (see Figure 14)
7.
Drop the economizer, inner shroud and outer
shroud together by separating the upper head and
outer shroud.
8.
Clean combustion coil with a wire brush.
9.
Reassembly is done in reverse order. Use
silicone sealer to seal joint between upped head
and outer shroud.
5F. Combined Water (potable) Heating
and Space Heating
(see Figure 15)
Piping and components connected to this water
heater for the space heating application shall be
suitable for use with potable water.
Toxic chemicals, such as used for boiler
treatment, shall not be introduced into the potable
water used for space heating.
This water heater when used to supply potable
water shall not be connected to any heating system or
component(s) previously used with a nonpotable water
heating appliance.
When the system requires water for heating at
temperatures higher than required for other uses, an
anti-scald mixing or tempering valve shall be installed
to temper the water for those uses in order to reduce
scald hazard potential.
Figure 13. Switch location.
Содержание HWG-M2-150
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Страница 9: ...9600 HWG Water Heater Page 9 Figure 8 Multiple 9600 HWG s storage tanks ...
Страница 16: ...Page 16 LAARS HEATING SYSTEMS Figure 18 Lighting and shutdown procedures ...
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