Specifications
2   670-000-004/1010 
READ THIS FIRST! 
Failure to adhere to the guidelines below can result in severe personal injury, death or substantial property damage.
Service and maintenance – 
1.  To avoid electric shock, disconnect electrical supply before 
performing maintenance. 
2.  To avoid severe burns, allow furnace to cool before performing 
maintenance. 
3.  Perform service and maintenance as described in this manual 
and the burner manual. 
4.  Do not attempt to make adjustments to the blower or motor while 
the furnace is in operation. Disconnect power to the furnace and 
be sure all parts have stopped moving before attempting 
adjustments or maintenance. 
5.  The burner must be set up and adjusted using combustion test 
instruments. Visual examination of the flame alone cannot 
determine combustion performance. 
Operation - 
6.  Do not use the furnace as a construction heater. 
7.  Do not operate any furnace if the heat exchanger is damaged, 
corroded or pitted. Toxic flue products could enter the air 
stream. 
8.  Do not jumper, attempt to by-pass or override any limit control. 
9.  Do not block flow of combustion or ventilation air to furnace. Do 
not block or obstruct the air openings in the furnace casing. 
10. Do not store or use combustible materials, gasoline, or other 
flammable liquids or vapors in the furnace area. 
11. Do not operate the furnace if the furnace area will be exposed to 
air contaminants as described on page 5. 
12. Should overheating occur, do not turn off or disconnect electrical 
supply to furnace. Instead, shut off the oil supply at a location 
external to the appliance, if possible. 
13. Do not use this furnace if any part has been under water. Call a 
qualified service technician immediately, to inspect the furnace 
and to replace any part of the furnace, control system or burner 
that was submerged in water. 
14. Do not operate furnace if temperature rise through heat 
exchanger exceeds 85
o
F. 
15. Inspect, clean and replace (if necessary) return air filter 
regularly. 
16. Do not obstruct return air grills or supply air outlets. 
17. Supply only #2 fuel oil to the burner. Never attempt to use 
gasoline, a mixture of gasoline and oil, waste fuel, refuse or any 
other substance in the burner of furnace. 
Installation - 
18. Do not block flow of combustion or ventilation air to furnace. Do 
not block or obstruct the air openings in the furnace casing. 
19. Connect furnace only to a functional vent system in good 
condition. Place the furnace to allow proper venting, with the 
shortest possible venting and minimum number or elbows. 
20. Always connect and seal a return air duct to the furnace unless 
the furnace is located in a large space, such as an unpartitioned 
basement. Route the return air duct to an adjacent room if no 
return air manifold is used. 
21. Install furnace maintaining minimum clearances for service and 
separation from combustible surfaces described in this manual. 
If furnace is installed on a combustible floor, you must use the 
combustible floor base or provide the minimum clearance from 
the furnace to the floor as given in this manual. 
22. Install, start-up, service and maintain burner per instructions in 
this manual and the burner manual. 
23. Verify burner is properly inserted through the combustion 
chamber opening. 
24. Furnace must be installed so that burner and control system 
components are protected from dripping, spraying water or rain 
during operation or service. 
25. If installing an air conditioning evaporator coil, install the coil 
downstream of, or in parallel with, the furnace to prevent 
condensation on the furnace heat exchanger. If the coil is in 
parallel, provide means to prevent flow of chilled air into the 
furnace, including an interlock to prevent simultaneous operation 
of heating and air conditioning. 
Apply the following suggestions to prevent unsatisfactory operation of the furnace.
Installation – 
1.  Be sure to level the furnace, using a spirit level at the front and 
one side. If the furnace is not level, oil can drip into the 
combustion chamber after burner cycling, contaminating the 
heat exchanger and the burner head. 
2.  Avoid locating return grills in rooms that may contain undesirable 
odors. 
3.  Never locate a return air grill closer than approximately 20 feet 
from the furnace. 
4.  Locate the furnace near the center of the supply and return duct 
systems. 
5.  Always check the size of the ducts on a replacement installation, 
particularly if adding air conditioning. 










