AIR 1-550.30
Heating equipment should be serviced before each heating
season to assure proper operations. The following items may be
required more frequently based on the environment in which the
unit is installed and frequency of equipment operation.
All installation and service of these units must be
performed by a qualified installation and service agency.
Before any service, BE SURE TO TURN OFF THE STEAM
OR WATER SUPPLY AT THE MANUAL SHUT-OFF VALVES
AND TURN OFF ALL ELECTRIC POWER TO THE HEATER.
MOTOR DATA / SERVICE
14
Motors
1. Remove grease and dirt on motor during each inspection or
lubrication. Open frame motors should be blown clean every
heating season, or whenever coils are cleaned, whichever is
sooner.
2. Lubricate motor according to manufacturer’s instructions
located on the motor. When no motor oiling instructions are
on the motor, oil the motor every two thousand hours of
operation with SAE20 motor oil for units in normal
applications. Adjust oiling according to usage and atmosphere.
3. Some motors do not have oil fittings. These motors are
lubricated for long life and do not require further lubrication.
4. A change in line voltage higher or lower than motor nameplate
rating may cause overheating and serious motor damage.
Check plant voltage conditions. A separate manual starter
with thermal overload protection device is recommended for
those units that do not have motors with built-in overload
protection.
Coils
1. Clean coil at least once a year; more often under unfavorable
conditions. Unless coil is kept reasonably free of dirt, lint and
grease, its original heating capacity will be reduced —
possibly to a serious degree, and motor damage may result.
Two commonly used cleaning methods are:
• Loosen dirt by brushing fins on side where air enters coil
and then turn on fan to blow dirt from unit.
• Use high pressure air hose to loosen dirt by blowing from
side where air leaves coil (side adjacent to louvers on blow-
through units; side adjacent to fan on draw-through units).
IMPORTANT
To check most of the Possible Remedies in the troubleshooting
guide listed in Table 15.1, 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 substitution of parts or controls not approved by the
factory will be at the owner’s risk.
CAUTION
1. Service or repair of this equipment must be performed by a
qualified service agency.
2. Do not reuse any electrical component which has been wet.
Replace component.
SERVICE
