Ardent F101 - Installation As An Add-On To An Oil Or Gas Furnace; Check The System Air Flow

8
INSTALLATION AS AN ADD-ON TO AN OIL
OR GAS FURNACE
Be sure that you have the following:
• Wood furnace module # F75R or F101
• Control kit model FCFC2 or FCFC3, which includes:
• Thermostat
• Damper motor
• 2 fan/limit controls mounted on a bracket
• Junction box
YOU MUST DETERMINE WHETHER THE OIL OR GAS
FURNACE SIZE FALLS WITHIN THE RANGE SHOWN IN
THE FOLLOWING TABLE:
The installation must be performed in series as shown:
(the attachment may be made on either side)
The following checks must be carried out before making
any alterations:
1. Check the size of the furnace. The furnace must match
the specifications of the above table.
2. If the existing furnace is an oil furnace, then check the
size of the nozzle in the oil burner (see table above).
fan limit control
wood section
room thermostat
wood
damper motor
wood section
white
black
red
120 v
blower
black
white
24 v
F igure 6: Wiring diagram for a forced air wood furnace
existing oil furnace
12" x 18" connecting duct
wood furnace
supply air
plenum
Figure 7: Connection to an oil furnace
Furnace Installation
3. Check the system air flow as follows:
• Open all of the registers and install a new filter.
• Measure the temperature rise using two thermometers.
One should be placed through a hole in the hot air plenum.
Run the furnace for 15 minutes then check the temperature,
giving the thermometers enough time to read accurately.
Record both the inlet and the outlet temperatures.
The temperature rise (outlet temperature minus the
inlet temperature) should not exceed 30° C (85° F). If so,
increase the blower speed so that the temperature rise is
less than or equal to 30° C (85° F).
• Find the air flow by using one of the following formulas:
If you are using metric units:
Q =
24 000 x G
A
Where: Q = air flow in cu. metres/sec
G = oil input rate in litres/sec.
A = air temperature rise, in °C
If you are using standard units:
Q = 95 000 x G
A
Where: Q = air flow in cu. ft/min
G = oil input rate in USGPM
A = air temperature rise, in °F
• Check that the duct work and chimney are sound and
that the chimney is of sufficient size (See the chimney
section).
After all checks have been carried out, the wood furnace
may be installed. This task must be performed by a qualified
technician.
Existing furnace O I L G A S
type
Input Output
F75R 243 to 3.79 litres/hr 20.0 to 27.8 Kw
(0.65 to 1.00USGPH) (64,000to98,000 BTU/hr)
F101 3.22 to 4.73 litres/hr 22.2 to 36.0 Kw
(0.85 to 1.25 USGPH) (76,000 to 123,000 BTU/hr)