Maintenance; Service & Troubleshooting - Modine Manufacturing IPT Series Installation And Service Manual

MAINTENANCE/SERVICE & TROUBLESHOOTING

MAINTENANCE

Qualified gas service personnel should service all heating
equipment before each heating season to assure proper
operation. The following items may require more frequent
service based on the environment in which the unit is installed,
and how long the unit is operated.
Burner Assembly
Disconnect all electrical power to the heater and close the gas
supply valve installed adjacent to the heater. With an air hose
regulated to 15 psig maximum, blow off any dust and dirt that
has accumulated on the heater.
Burner Orifice
Remove burner orifice, clean, and reinstall on the heater
manifold. Drill sizes can be found in Table 19.1.
Combustion Air Blower
The combustion air blower motor is permanently lubricated, and
does not require additional lubrication. An air restrictor plate
(see Figure 22.1), sized for the appropriate fuel type and burner
input, is installed by the factory and must not be field-adjusted.
Radiant Tube and Vent System
Check for restrictions and/or condensate and correct as
required. Sections with corrosion are to be replaced.
Electrical Wiring
The electrical wiring should be checked annually for loose
connections or deteriorated insulation.
Gas Piping & Controls
The gas valves and piping should be checked annually for
general cleanliness and tightness. Verify the manual shut-off
valve is gas-tight on annual basis. The gas controls should be
checked to insure that the unit is operating properly.
Removal of Burner Enclosure Panels
Each of the two burner enclosure side panels is held in place by
screws, as shown in Figure 22.1. Once the screws are removed,
the burner enclosure side panels can be removed for access to
the burner assembly.
Figure 22.1 - Burner Enclosure
Side Access
Panel Hook
Burner
Enclosure Panel
22
Combustion
Remove Blower
Screws Air Restrictor
Plate
Removal of Ignitor and Flame Sensor Housing
The ignitor and flame sensor housing is held in place by three
(3) screws, as shown in Figure 22.2. Once the screws are
removed, the ignitor and flame sensor can be accessed. The
housing must be returned to the unit once service/maintenance
is complete.
Figure 22.2 - Ignitor and Flame Sensor Housing
SERVICE & TROUBLESHOOTING
IMPORTANT
To check most of the Possible Remedies in the
troubleshooting guide listed in Table 23.1, refer to the
applicable sections of the manual.
WARNING
When servicing or repairing this equipment, use only
factory-approved service replacement parts. A complete
replacement parts list may be obtained by contacting
Modine Manufacturing Company. Refer to the rating plate
on the unit for complete unit model number, serial number,
and company address. Any substitution of parts or controls
not approved by the factory will be at owner's risk.
Do not attempt to reuse any mechanical or electrical
controllers which have been wet. Replace defective
controller.
9-511.4
Ignitor and Flame
Sensor Housing
Flame
Sight
Glass
CAUTION