LAARS 9600 CB - Installation, Operation and Maintenance Instructions - Manual (Page 15)

9600 CB
Page 15
Figure 19. Wiring diagram.
Figure 18. Cutaway view.
2.2 Service Maintenance
To be done by a qualified service person.
a. Vent and Condensate drain inspection
(performed annually). Clean or replace if
necessary.
b. Inspect the vent terminals for blockage or
restrictions.
c. Check the condition of the internal vent fittings
and hose and replace as necessary.
d. Check the condensate drain lines for blockage
and optional condensate pump for proper
operation.
e. Cleaning combustion chamber coil and/or
burner.
NOTE: In normal operation this procedure is never
required. Should it prove necessary, the following
procedure is used to access the coil for cleaning:
a. Turn off the gas and electrical power to unit and
remove covers to the unit.
b. Remove plastic boiler 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.
c. Shut off water to the system and disconnect and
remove the supply and return pipe.
d. Separate the union on the economizer pipe and
remove the lower half of the union from the
economizer outlet.
e. Undo the four economizer retainer nuts (see
Figure 18). Remove the boiler drain valve.
f. Undo the four clamps that hold the outer shroud
to the upper head (see Figure 18).
g. Drop the economizer, inner shroud and outer
shroud together by separating the upper head and
outer shroud.