035-17473-000-B-1101
Unitary Products Group
13
MAINTENANCE AND SERVICE
Routine Maintenance By Home Owner
Other than remembering to arrange for the annual pro-
fessional servicing of the furnace by the service or
installation contractor, the most important routine ser-
vice performed by the home owner is to maintain the
air filter or filters. A dirty filter can cause the furnace to
over-heat, fail to maintain indoor temperature during
cold weather, increase fuel consumption and cause
component failure.
The furnace filter(s) should be inspected, cleaned or
replaced monthly. The furnace is factory equipped with
a semi-permanent type filter. If the filter is damaged,
replace with filters of the same size and type.
During the routine service, inspect the general condi-
tion of the furnace watching for signs of oil leaks in the
vicinity of the oil burner, soot forming on any external
part of the furnace, soot forming around the joints in the
vent pipe, etc. If any of these conditions are present,
please advice your service or installation contractor.
Annual Service By Contractor
The heat exchanger should be inspected periodically
and cleaned if necessary. if cleaning is necessary,
SHUT OFF POWER TO THE FURNACE and remove
the burner. Using a stiff brush with a wire handle, brush
off scale and soot from inside the drum and flue pipe.
To clean the radiator, remove the round covers on the
inner radiator access pipes located on the front panel
between the oil burner and the flue pipe.
A wire brush can be used to loosen dirt and debris on
the inside surfaces of the radiator. Clean out all accu-
mulated dirt, soot and debris with a wire handled brush
and an industrial vacuum cleaner. Replace the clean-
out covers.
Most direct drive blower motors are permanently lubri-
cated by the motor manufacturer. These motors will
have no oil ports. If the blower motor does contain oil
ports, under normal operating conditions it will not
require oiling for the first two years. Oil sparingly (a few
drops) in each oil port with SAE 20 non-detergent oil.
Oiling is most easily done with a "tele-spout" oilier. This
oilier has a long flexible plastic spout. DO NOT OVER-
LUBRICATE. Excess oil causes premature electric
motor failure.
Inspect the blower fan. Clean it if necessary.
Oil Burner Maintenance: Follow the instructions of the
oil burner manufacturer. (See oil burner manufacturer's
instructions supplied with furnace). The oil burner noz-
zle should be replaced annually. We recommend that
the oil filter be changed on an annual basis.
The venting system should be cleaned and inspected
for signs of deterioration. Replace pitted or perforated
vent pipe and fittings. The barometric damper should
open and close freely.
All electrical connections should be checked to ensure
tight connections. Safety controls such as the high limit
controls should be tested for functionality. The fan con-
trol functions should be checked to ensure that all fan
speeds are operating properly.
FURNACE INSTALLATION SET UP
The furnace must be set up as the final step in the
installation.
A.
THE OIL BURNER MUST BE SET UP FOL-
LOWING THE PROCEDURES OUTLINED IN
OIL BURNER SET UP ON PAGE 11.
B.
THE P-HMX12F057011 AND P-HMX12F08001
SHOULD OPERATE WITHIN A TEMPERA-
TURE RISE OF 50°F TO 85°F; THE
P-HMX14F10001
AND
P-HMX20F1201
SHOULD OPERATE WITHIN A TEMPERA-
TURE RISE OF 65°F TO 80°F. TO DETERMINE
THE TEMPERATURE RISE, MEASURE THE
SUPPLY AIR AND RETURN AIR TEMPERA-
TURES WHEN THE FURNACE HAS REACHED
STEADY STATE CONDITIONS. THIS IS THE
POINT AT WHICH THE SUPPLY AIR TEMPER-
ATURE STOPS INCREASING RELATIVE TO
THE RETURN AIR TEMPERATURE. THE FUR-
NACE MAY HAVE TO RUN 10 TO 15 MINUTES
TO REACH STEADY STATE CONDITIONS.
THE MEASUREMENTS MAY BE MADE WITH
DUCT THERMOMETERS OR THERMOCOU-
PLES USED IN CONJUNCTION WITH MULTI-
METERS WITH TEMPERATURE MEASURE-
MENT CAPABILITIES.
Do not start the burner or blower fan unless the
blower access door is securely in place.
The combustion chamber is fragile. use care when
inspecting and cleaning this area.
CAUTION
CAUTION
