Service manual

SECTION 10: SERVICING INSTRUCTIONS
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SECTION 10: SERVICING INSTRUCTIONS
Disassembly and removal or replacement of any
pump components must be done by a service con-
tractor or electrician qualified in the installation and
service of gas-fired heating equipment.
Overtorquing can result in a failure of components.
Failure to follow these instructions can compromise
pump operation and void warranty.
10.1 Pre-Season Maintenance and Annual
Inspection
To e n s ure your safety and years of trouble-free oper-
ation of the pump, service and annual inspections
must be done by a contractor qualified in the installa-
tion and service of gas-fired heating equipment.
Disconnect electric and gas supplies before perform-
ing serv ice or maintenance.
Before every heating season, a contractor qualified in
the installation and service of gas-fired heating
equipment must perform a thorough safety inspec-
tion of the pump.
For safety and best performance, the electrical, vent-
ing, suspensions and overall p
ump condition are
some of the areas requiring inspection.
Please see Page 23, Section 10.3 for su ggested
items to inspect.
10.2 To Change the Motor and/or the Impeller
Diconnect electrical before servicing.
1. To r e m o ve the motor or impeller, the scroll must
be opened. Remove the eight nuts/bolts and
insert a knife blade between the scroll halves to
cut through the factory applied sealant. Sepa-
rate the two halves.
2. The impeller can be removed by loosening the
two 3/8-24 set screws, removing the 10-32
screw and retainer assembly. With an appropri-
ate wheel puller, remove the impeller.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater and
pump to cool before
service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater and pump must
be connected to a
properly grounded
electrical source.