Maintenance Instructions for General Equipment
READ INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO ASSEMBLE,
SERVICE OR OPERATE XETEX HEAT-X-CHANGER UNITS. FAILURE TO COMPLY WITH INSTRUCTIONS
COULD RESULT IN PERSONAL INJURY AND/OR PROPERTY DAMAGE!
SPECIAL WARNING: No untrained person should attempt to
install, maintain, or service XeteX Heat-X-Changer units.
HEAT-X-CHANGERS
- Periodically check the four exchanger face surfaces to assure unobstructed,
clean surfaces. Plate a light in the exhaust outlet and examine the inside
of the Heat-X-Changer from the Exhaust Inlet. Examine the inside
of the Supply air in the same way as the exhaust. Use a power washer, water
spray hose, or vacuum cleaner as appropriate to clean the Heat-X-Changer.
BLOWERS
- Grease the bearings at regular intervals. If the unit is not used for
an extended period of time, rotate the fan periodically and re-grease it
as necessary.
- Check the security of the mounting bolts.
- If provided, check the security of the vibration isolators.
Direct Drive Blowers
- Check blower and motor using the guidelines detailed elsewhere in these
instructions. Electrically connect the correct motor leads to obtain the
appropriate RPM if the motor is multiple speed.
V-Belt Drives
- Check and adjust the belt tension and alignment as necessary. After the
initial start up and 80 hours of operation, re-tighten the belt tension.
- It is important that the drives be in good alignment, with motor and blower
shafts parallel. Motor must be adjusted until about 3/4" deflection
of the bolt is noted with finger pressure in the middle of belt. Small changes
in motor adjustment from this start may be needed for smoothest operation.
Belts stretch over a period of time and motor should be adjust to compensate
for this.
- Excessive deflection is an indication that the belt is not tight enough
and if not corrected could result in slippage causing loss of blower speed
and belt failure through water.
- Too small a deflection indicates that the belt is too tight and if not
slackened somewhat could cause noise from excessive vibration, premature
bearing failure, and shorter belt life. Excessive belt tension can create
such a power demand as to actually overload a motor that otherwise would
be quite adequate. A belt should be just tight enough to avoid slippage.
- Good pulley alignment is also very important in order to conserve belt
life as well as eliminate the possibility of unnecessary noise.
- Periodic inspection should be made to determine if the unit is still soundly
mounted and the belt is not slipping. Accumulations of dust and oil on the
wheel will impair its performance and put the unit out of balance. If this
occurs, it is necessary to clean the wheel and housing. It is especially
dangerous to allow large amounts of oil to accumulate in a system, for this
represents a fire hazard.
MOTORS
- Lubricate the bearings (if the unit is not provided with the permanently
lubricated bearings).
- Check the security of the motor mount bolts.
DRAINS
- Insure that drains are opened and unobstructed. Drain lines must be free
of foreign material.
DISPOSABLE FILTERS
- Inspect the filters and change or clean them as required based on the
environmental conditions.
EXHAUST AIR STREAM
- Visually inspect the leading edges of the entry side of the exhaust air
stream on the heat recovery elements.
- Inspect the exhaust blower intake, blower wheels, and blower housing.
Clean these as necessary.
- If necessary, the heat recovery element can be cleaned by using a power
washer. Detergents and solvents with a neutral pH are preferred. Initial
inspections must be conducted in order to determine the necessity and the
frequency needed for cleaning the heat recovery elements. *Note: the unit
must be shut down (supply and exhaust fans) during cleaning and at any time
the unit is being serviced.
SUPPLY AIR STREAM
- The supply air side of the heat recovery element should not require wash
down if the disposable filters are maintained regularly according to the
environmental conditions.
DUCT WORK SEALS
- Periodically examine the duct work connection seals since the entire heat
recovery unit may be negative pressure during operation.
