AAON M1-011 - Manual (Page 30)

30
Heating
Electric
Set thermostat in the heat mode; call for heat to
engage all electric heat strips. Check blower for
proper rotation and voltage. Measure the amperage
and voltage. Compare them to the nameplate data.
If applicable, check remote heat pump condenser as
per the manufacturer’s recommendations.
Steam or Hot Water
Set thermostat in the heat mode. Observe supply
blower for proper rotation and voltage. Check boiler or
hot water operation according to the manufacturer’s
instructions. Check control flow valves for correct
operation and settings per the manufacturer’s
instructions.
Cleaning
Inspect and clean unit interior at the beginning of each
heating and cooling season and as operating
conditions require
.
Chilled Water
Check remote chiller operations as per the
manufacturer’s instructions. Check coolant flow valves
for correct operation and settings.
Lubrication
Most motors and bearings are permanently lubricated.
Some applications, however, will require that bearings
be re-lubricated periodically. The schedule will
depend on the operating duty, temperature variations
or other atmospheric conditions.
For bearings equipped with lubrication fittings the
lubrication schedule is dependent on operating
temperatures, and rotational speeds as shown in table
5 below. Lithium based grease conforming to an NLGI
grade No. 2 consistency is recommended. This
medium viscosity, low torque grease is rust inhibiting,
and water-resistant. It is satisfactory for operating
temperatures in the range of –10
°F to 250°F.
Bearings should only be re-lubricated when at normal
operating temperatures, and not running. Rotate the
fan shaft by hand, adding only enough grease to purge
the seals. A one-inch bearing has a total grease
capacity of only .25 ounces. Added grease should be
limited to .09 ounces.
Recommended greases are:
− SHELL OIL – DOLIUM R
− CHEVRON OIL – SRI No. 2
− TEXACO INC. – PREMIUM RB
Table 7.4, Fan Bearing Lubrication Schedule
Fan Speed Temperature Environment Greasing Interval
500 rpm Up to 150 °F Clean 2 to 6 months
1000 rpm Up to 210 °F Clean 2 weeks to 2 months
1500 rpm Up to 210 °F Clean Monthly
Any Speed Up to 150 °F Dirty 1 week to 1 month
Any Speed 210 - 250 °F Dirty Weekly
Service
In the event the unit is not functioning correctly and a
service company is required, only a company with
service technicians qualified and experienced in both
heating and air conditioning should be permitted to
service the systems in order to keep warranties in
effect. The service tech may call the factory if
assistance is required.
BEFORE CALLING, THE MODEL AND SERIAL
NUMBER OF THE UNIT WILL BE NEEDED FOR THE
WARRANTY SERVICE DEPARTMENT TO HELP
ANSWER QUESTIONS REGARDING THE UNIT.
AAON Coil Products
Phone: 1-903-247-9242
Fax: 903-236-4463
Warranty Department
Filters
Open filter access door. Slide filters towards you and
inspect. Replace old filters with the size indicated on
each filter or as shown in Table 1.1. Be sure arrow
points toward the blower. Filters should be checked
every 30 days and replaced or cleaned as necessary.
IT IS IMPORTANT TO KEEP COILS, BLOWERS,
AND FILTERS CLEAN!
DO NOT OVER
LUBRICATE!