Maintenance; Service - Modine CW 002 Manuel D'installation Et D'entretien

MAINTENANCE / SERVICE
All heating equipment should be serviced before each heating
season to assure proper operations. The following items may
be required to have more frequent service scheduled based on
the environment in which the unit is installed, and the frequency
of the equipment operation.
Motors
A. Cleaning
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.
B. Lubrication
1. Lubricate motor according to manufacturer's instructions
located on the motor.
2. When no motor oiling instructions are on the motor,
oil the motor every two thousand hours of operation
with SAE20 non-detergent 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. Check motor shaft for excessive end play every 3 to 5
years.
C. Overload Protection
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
A. Cleaning
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:
1. Loosen dirt by brushing fins with a soft brush on side where
air enters coil and then turn on fan to blow dirt from unit.
2. 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).
Coils subjected to corrosive fumes should be checked and
cleaned frequently.
Do not use any commercial solvent that could deteriate the coil
and do not use any liquid or steam sprays that could damage
electrical components.
Good filter maintenance will minimize the frequency of coil
cleaning.
B. Internal Corrosion Safeguards
1. Provide controlled water treatment — don't use excess of
boiler compounds. Contact your boiler compound supplier
for proper usage or the services of a water treatment
laboratory.
2. Periodic internal flushing of the coils is recommended in
areas where water supply is suspected of causing scale.
Use an alkaline-chelant solution and introduce it at the main
pump of the hydronic system. Flush thoroughly.
Using inorganic or mineral acids, such as muriatic
(hydrochloric) acid, even though inhibited, may lead to
severe damage including corrosion and leakage.
3. De-aerate boiler feed-water (particularly if large amount of
new water is used).
4. Insure rapid continuous and adequate condensate drainage
by properly sized and installed traps and piping. Check traps
for sticking. Clean strainers ahead of traps. (When traps
don't work, condensate accumulates in unit heater coil;
water hammer results.)
5. Adequately vent each unit.
6. Use low pressure steam when possible.
Casings
A. Cleaning
1. Periodic cleaning of casings is recommended to remove dirt,
grease and corrosive substances that may injure finish.
Rusted or corroded spots should be cleaned and repainted.
2. Clean air filters every three months or sooner depending on
dust conditions.
B. General Inspection
Tighten fan guard and motor bracket. Check fan for proper
clearance, free rotation and firm connection to shaft.
When servicing is complete, tag unit to indicate date of
inspection, lubrication and cleaning.

SERVICE

If a qualified service person cannot solve the problem,
consult your local plumbing/electrical contractor or local Modine
representative.
When servicing, repairing or replacing parts on these units
always give the complete Model Number and Serial Number
from the unit identification plate.
Replacement Parts
When requesting parts please contact your local representative.
Please have full model and serial number available.
11-500.7
WARNING
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