Service manual

EP-100 PUMP INSTALLATION, OPERATION AND SERVICE MANUAL
24 of 29
SECTION 10: SERVICING INSTRUCTIONS
Disassembly and removal or replacement of any
pump components must be done by a service
contractor 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 ensure your safety and years of trouble-free
operation of the pump, service and annual
inspections must be done by a contractor qualified in
the installation and service of gas-fired heating
equipment.
Disconnect electric and gas supplies before
performing service or maintenance.
Before every heating season, a contractor qualified in
the installation and service of gas-fired heating
equipment must perform a thorough safety
inspection of the pump.
For safety and best performance, the electrical,
venting, suspensions and overall p
ump condition are
some of the areas requiring inspection.
Please see Page 25, Section 10.3 for su ggested
items to inspect.
10.2 To Change the Motor and/or the Impeller
1. Disconnect electrical before servicing.
2. Remove the pump boots from the inlet and
outlet of the scroll assembly, disconnecting the
pump from tailpipe and vent pipe.
3. To remove the motor or impeller, the scroll and
inlet plate must be detached. Remove the six
nuts attaching the scroll to the pump frame.
4. Remove the scroll assembly and inlet assembly
from the frame as one piece.
5. The impeller can be removed by loosening the
two 3/8"-24 set screws. With an appropriate
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.