O-ITF-07
Page
13
(4)
MOTOR AND MOTOR BEARINGS
- Check for dirt and debris accumulation on "air travel"
openings of open type motors to prevent overheating. Relubricate motor bearings every 2000
hours of operation while it is warm and at a stand still. Remove and clean upper and lower
grease plugs. Insert grease fittings into upper hole adding a small amount of clean grease with a
low pressure gun. Run motor 5 minutes before replacing plugs. Excessive grease will overheat
the bearings. Use only high grade mineral grease having a 200 degrees F safe operating
temperature. (If special lubrication instructions are shown on the motor nameplate they will
supersede all other instructions).
(5)
SHEAVES
- After air balance, require no further adjustment. However, sheave locking devices,
wear, alignment and belt tension should be checked on a regular basis.
(6)
DAMPER BLADES AND LINKAGE
- should be inspected regularly for dirt and/or debris build
up to insure abnormal wear or damage does not occur. Winterize damper system prior to cold
weather to insure that proper sequence of control is being maintained, paying close
attention to operation of outside air intake. Outside air damper should be checked closely for
minimal leakage when closed.
(7)
OUTSIDE AIR INTAKE HOOD
- should be checked for debris in birdscreen and/or obstructions
to air flow (such as old boxes, new walls or fences, etc.) around unit. Clean or remove as
required.
(8)
WATER COILS
- (Heating and Cooling) if not antifreeze protected or heater protected should be
drained as thoroughly as possible and then treated in the following manner:
Fill each coil independently with an antifreeze solution
using a small circulating pump and again drain. Check
freezing point of antifreeze before proceeding to next
coil. Due to a small amount of water always remaining in
each coil, there will be a diluting effect. The small
amount of antifreeze solution remaining in coil must
always be concentrated enough to prevent freeze-up.
Carefully read instruction for mixing antifreeze solution
used. Some products will have a higher freezing point in
its natural state than when mixed with water.
Failure of controls, outside air dampers and air stratification can cause freeze-up and permanent
coil damage if above precautions are not observed. Do Not allow dirt to accumulate between the
fins of coils. Use water, steam or air to remove dirt.
(9)
STEAM COIL
- fins should be cleaned in the same manner as Water Coils. Steam lines to and
from unit should be checked for pitch, pipe sag and blockage to avoid "Water-hammer".
Strainers and traps require annual cleaning minimum.
(10)
CONDENSATE PAN
- should be checked for dirt and debris build-up and cleaned. Trap and
drain should also be cleaned especially if blockage is evident.
