Table of Contents
Advertisement
Filters
All ML180DF filters are installed external to the unit. Filters
should be inspected monthly. Clean or replace the filter(s)
when necessary to ensure proper furnace operation. A fil
ter must be in place when the unit is operating. See ta
ble 1 for recommended filter sizes.
NOTE - Use replacement filters that are similar in size and
efficiency ratings to those originally provided by the in
stalling contractor. Use of replacement filters with higher fil
tration ratings may restrict air flow to the furnace. This may
result in reduced unit efficiency, as well as premature blow
er motor failure.
TABLE 1
Cabinet Width
A (14-1/2")
B (17-1/2")
C (21")
Maintenance
A licensed professional service technician (or equivalent)
should inspect the complete system each season (heating
and cooling). The following maintenance procedures
should only be conducted by a licensed professional ser
vice technician (or equivalent). Do not attempt to service
the unit in any way.
WARNING
ELECTRICAL SHOCK, FIRE,
OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly could result
in dangerous operation, serious injury, death or
property damage.
Improper servicing could result in dangerous opera
tion, serious injury, death, or property damage.
Before servicing, disconnect all electrical power to
furnace.
When servicing controls, label all wires prior to dis
connecting. Take care to reconnect wires correctly.
Verify proper operation after servicing.
CAUTION
To ensure proper operation, a licensed professional
service technician (or equivalent) should check the
burner flame and conduct a combustion analysis
annually.
Return Air Filter Size (inches)
14 x 25 x 1 (1)
16 x 25 x 1 (1)
20 x 25 x 1 (1)
Annually (before heating season) inspect furnace venting
system, vent cap, heat exchanger, and burners for corro
sion, deterioration, or deposits of debris. Remove any ob
structions.
Inspect the furnace for obvious signs of deterioration.
Inspect the furnace venting system to make sure it is in
place, physically sound, and without holes, corrosion, or
blockage.
Vent pipe must be clear and free of obstructions and must
slope upward away from the furnace.
Inspect the furnace return air duct connection to ensure
duct is sealed to the furnace and terminates outside the
space containing the furnace.
Inspect the physical support of the furnace to guarantee
that it is sound without sagging, cracks or gaps around
base and it maintains seal between base and support.
During a seasonal check the service technician will con
duct a combustion analysis. The technician will also in
spect the indoor blower, burner flames, electrical connec
tions and the venting system.
Blower
Check the blower wheel for debris and clean if necessary.
The blower motors are prelubricated for extended bearing
life. No further lubrication is needed.
The blower access panel must be securely in place
when the blower and burners are operating. Gas
fumes, which could contain carbon monoxide, can
be drawn into living space resulting in personal inju
ry or death.
Electrical
1 - Check all wiring for loose connections.
2 - Check for the correct voltage at the furnace (furnace
operating).
3 - Check amp-draw on the blower motor with blower ac
cess panel in place.
Motor Nameplate__________Actual__________
Page 5
WARNING
Advertisement
Table of Contents
