Walter Wilson OLR112A16A, Installation Instructions And Homeowner'S Manual

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7
2.7.1 Contaminated Combustion Air
Installations in certain areas or types of structures will increase
the exposure to chemicals or halogens that may harm the
furnace. These conditions will require that only outside air be
used for combustion.
The following areas or types of structures may contain or be
exposed to certain substances, potentially requiring outside air
for combustion:
a. Commercial buildings;
b. Buildings with indoor pools;
c. Furnaces installed near chemical storage areas.
Exposure to the following substances:
a. Permanent wave chemicals for hair;
b. Chlorinated waxes and cleaners;
c. Chlorine based swimming pool chemicals;
d. Water softening chemicals;
e. De-icing salts or chemicals;
f. Carbon
tetrachloride;
g. Halogen type refrigerants;
h. Cleaning solvents (such as perchloroethylene);
i.
Printing inks, paint removers, varnishes, etc. ;
j. Hydrochloric acid;
k. Solvent based glue;
l.
Antistatic fabric softeners for clothes dryers;
m. Acid based masonry cleaning materials.
2.7.2 Burner with Outdoor Combustion Air Kit
Certain burners are designed to function with combustion air
taken directly from the outside. Follow the instructions provided
with the burner, the fresh-air supply kit or the side-wall venting
kit.
2.8 OIL TANK
WARNING
Fire and explosion hazard.
Use only approved heating type oil in this furnace.
DO NOT USE waste oil, used motor oil, gasoline or
kerosene.
Use of these will result in death, bodily injury and/or
property damage.
CAUTION
When a 0.75 USGPH or smaller nozzle is used, a 10 micron or
finer filter, must be installed on the oil supply line to the
furnace inside the building where the unit is located.
This is a requirement in order for the heat exchanger warranty
to remain in force.
Check your local codes for the installation of the oil tank and
accessories.
At the beginning of each heating season or once a year, check
the complete oil distribution system for leaks.
Ensure that the tank is full of clean oil. Use No.1 or No.2
Heating Oil (ASTM D396 U.S.) or in Canada, use No.1 or No.2
Furnace Oil.
A manual shut-off valve and an oil filter shall be installed
in sequence from tank to burner. Be sure that the oil line is
clean before connecting to the burner. The oil line should
be protected to eliminate any possible damage.
Installations where the oil tank is below the burner level
must employ a two-pipe fuel supply system with an
appropriate fuel pump. A rise of 2.4 m (8') and more
requires a two stage pump and a rise greater than 4.9 m
(16') an auxiliary pump. Follow the pump instructions to
determine the size of pipe needed in relation to the rise or
to the horizontal distance.
2.9 DUCTING
WARNING
Poisonous carbon monoxide gas hazard.
DO NOT draw return air from inside a closet or utility
room. Return air MUST be sealed to the furnace
casing.
Failure to properly seal ducts can result in death,
bodily injury and/or property damage.
The ducting must be designed and installed according to
approved methods, local and national codes as well as
good trade practices.
When ducting supplies air to a space other than where the
furnace is located, the return air must be sealed and also
be directed to the space other than where the furnace is
located.
2.9.1 Air filter
A properly sized air filter must be installed on the return air
side of the unit. Refer to the Technical Specifications,
p.15, for the correct dimensions. Also refer to Section 2.3
and the instructions supplied with the filter.
2.10 SUPPLY AIR ADJUSTMENTS
(4 SPEED MOTOR)
On units equipped with 4-speed blower motors, the supply
air must be adjusted based on heating/air conditioning
output and the static pressure of the duct system. For the
desired air flow refer to the following table as well as the
air flow tables based on static pressure in the Technical
Specifications section of this manual.
BLOWER SPEED ADJUSTMENTS
(HEATING MODE, 4 SPEED MOTOR)
HEATING
CAPACITY
(USGPH)
STATIC
PRESSURE
(W.C.)
RECOMMENDED
BLOWER SPEED
0.68
0.25” MED-LOW
0.68
0.50” MED-LOW
0.80
0.25” MED-HIGH
0.80
0.50” MED-HIGH