Oil Furnace Installation Manual
Table Of Contents
506793-02B Page 9 of 16Issue 1810
Removal of Unit from Common Venting System
When an existing furnace is removed from a common
venting system service other appliances, the venting
system is likely to be too large to properly vent the
remaining attached appliances. The following test
should be conducted with each appliance while the other
appliances connected to the common venting system are
not in operation.
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage
or restriction, leakage, corrosion, or other deciencies
which could cause an unsafe condition.
3. Insofar as is practical, close all building doors and
windows between the space in which the appliances
remaining connected to the common venting system
are located and other spaces in the building. Turn on
clothes dryers and any appliance not connected to the
common venting system. Turn on exhaust fans, such
as range hoods and bathroom exhausts, so they will
operate at maximum speed. Do not operate a summer
exhaust fan. Close replace dampers.
4. Following the lighting instructions, place the unit being
inspected in operation. Adjust the thermostat so the
appliance will operate continuously.
5. Test for spillage at the draft control relief opening after
5 minutes of main burner operation. Use the ame of
a match or candle.
6. After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above, return
doors, windows, exhaust fans, replace dampers,
and any other fuel burning appliance to their previous
condition of use.
7. If improper venting is observed during any of the above
tests, the common venting system must be corrected.
See National Fuel Gas Code, ANSI Z223.1 (latest
edition) or CAN/CGA B149.1 & .2 Installation
Codes to correct improper operation of common
venting system.
Supply and Return Air Plenum
Secure return air plenum to unit using sheet metal screws.
Follow these procedures when installing supply air plenum:
1. Use sealing strips of berglass.
2. Attach the plenum to the furnace or evaporator cabinet
with sheet metal screws.
3. Both supply and return air plenums shall be square and
at least 18” long. They should be the same dimension
as the furnace opening.
4. Install supply and return air ducts as desired.
Oil Supply and Oil Filter Connection
Continuous lengths of heavy wall copper tubing or steel
pipe are recommended and should be installed under the
oor or near walls to protect from damage. Do not run lines
on oor joists or other reverberating surfaces. Always use
are ttings located in accessible places.
Install a generous capacity oil lter inside building between
the fuel shutoff valve and burner. Locate lter and valve
close to burner for easy servicing. An oil lter is required for
all models. A 100-micron lter is recommended.
Combustion Chamber
The combustion chamber is installed in the furnace at the
factory. Read the instruction plate on the front of the unit
concerning proper care of the chamber.
This combustion chamber is made of preformed ceramic
ber material. Use extreme care when installing the oil
burner so that the chamber is not damaged around the
burner tube.
Fan and Limit Control
The fan and limit control is installed and wired at the
factory. Replacement of the fan and limit control must be
made with an identical control as originally supplied on the
equipment from the factory including “fan” and “limit” stops.
The use of any other controls will void the warranty of the
furnace. Operation of this furnace with greater than 130°F
“Fan On” air temperature will also void the warranty of the
furnace.