Walter Wilson OLR112A16A, Installation Instructions And Homeowner'S Manual

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2 INSTALLATION 

The unit is shipped with a burner and its controls. It requires a 
115VAC power supply to the control panel and thermostat 
hook-up as shown on the wiring diagram, one or more oil line 
connections, suitable ductwork and connection to a properly 
sized vent.  

All local and national code requirements governing the 
installation of oil burning equipment, wiring and the flue 
connection MUST be followed. Some of the codes that may 
apply are: 

CSA B139:

Installation code for oil burning equipment. 

ANSI/NFPA 31:

   Installation of oil burning equipment. 

ANSI/NFPA 90B:

 Warm air heating and air conditioning 

systems. 

ANSI/NFPA 211:

  Chimneys, Fireplaces, Vents and solid fuel 

burning appliances.

ANSI/NFPA 70:

   National Electrical Code.  

CSA C22.1 or CSA C22.10:

Canadian Electrical Code. 

Only the latest issues of these codes may be used. 

2.1 POSITIONING

THE

FURNACE 

WARNING 

Fire and explosion hazard. 

The furnace must be installed in a level position, never 
where it will slope toward the front. 

Do not store or use gasoline or any other flammable 
substances near the furnace. 

Non-observance of these instructions will potentially result 
in death, bodily injury and/or property damage. 

CAUTION 

This furnace is not watertight and is not designed for outdoor 
installation. It must be installed in such a manner as to protect 
its electrical components from water. Outdoor installation will 
lead to a hazardous electrical condition and to premature 
failure of the equipment. 

The minimum clearances from combustible material for 
each of the positions are specified in Table 4. 

If the furnace is installed in a basement or on a dirt floor, in a 
crawl space for example, it is recommended to install the unit 
on a cement base 2.5 cm to 5.0 cm (1" to 2") thick. 

The unit must be installed in an area where the ambient and 
return air temperatures are above 15°C (60°F). In addition, the 
furnace should be installed as closely as possible to the vent, 
so that the connections are direct and kept to a minimum. The 
heater should also be located close to the centre of the air 
distribution system. 

2.1.1 

Installation in an enclosure 

The unit can be installed in an enclosure such as a closet. 
However, 2 ventilation openings are required for 
combustion air. The openings should be located in front of 
the furnace approximately 15 cm (6") above the floor and 
15 cm (6") below the ceiling. Figure 1 indicates the 
minimum dimensions required and the location of the 
openings.  

Figure 1 

Location and dimensions of 

ventilation air openings in a closet door  

2.2 ELECTRICAL

SYSTEM 

CAUTION 

The exterior of the unit must have an uninterrupted ground 
to minimize the risk of bodily harm, if ever an electrical 
problem develops. A green ground screw is supplied with 
the control box for that purpose.

The appliance must be installed in accordance with the 
current ANSI/NFPA 70 National Electrical Code, CSA 
C22.1 Canadian Electrical Code Part 1 and/or local codes. 

The control system depends on the correct polarity of the 
power supply. Connect “HOT” wire (H) and “NEUTRAL” 
wire (N) as shown in Figures 3 and 4, p. 17 and 18. 

A separate line voltage supply should be used, with fused 
disconnect switch or circuit breaker, between the main 
power panel and the unit. 

Only copper wire may be used for the 115V circuit on this 
unit. If wires need to be changed, the replacements must 
have the same temperature resistance as the originals. 
 

2.3  INSTALLATION OF THE THERMOSTAT 

A thermostat must be installed to control the temperature 
of the area to be heated. Follow the instructions supplied 
with the thermostat. Also refer to the wiring diagrams 
provided with the heating/air conditioning unit. The 
connections must be made as indicated on the following 
diagrams and the wiring diagrams, p. 17 and 18. 
 

Thermostat Wiring