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START-UP PROCEDURE
Check the furnace operation as outlined in the following
instructions. If any sparking, odors or unusual noises
are encountered, shut off electric power immediately.
Recheck for wiring errors or obstructions in or near fan
motor (if equipped).
WARNING: Natural gas heating value (BTU per
cubic foot) can vary significantly. Therefore, it is the
installer's responsibility to see that BTU/hr. input to
the furnace is adjusted properly. Failure to do so could
cause combustion chamber failure, asphyxiation, fire or
explosion resulting in damage, bodily injury or death.
Refer to the National Fuel Gas Code (NFPA 54) to be
sure the furnace is burning fuel at the proper rate.
Check gas input and pressures
This furnace may not be used at elevations above 4,500 Feet.
Gas supply pressure and manifold pressure with the burner
operating must also be as specified on the nameplate.
Rated input will be obtained on a heating value of 2,500
BTU/hr. with factory-sized orifices. If Propane, having
a different heating value is supplied, orifices must be
changed by a qualified service technician before the
furnace is operated. CAN NOT BE MODIFIED TO BE USED
ABOVE 4,500 FEET
CHECK THE MANIFOLD GAS PRESSURE
Types of Gas
Natural
A tapped opening is provided in the gas valve to facilitate
measuring manifold gas pressure. A water column
manometer having a scale range from 0 to 12-inches of
water column should be used for this measurement. The
manifold pressure must be measured with the burner. Any
major changes in the flow must be made by changing the
size of the burner orifice.
CHECK THE GAS INPUT (NATURAL GAS ONLY)
Under firing could cause inadequate heat, excessive
condensation or ignition problems. Over firing could
cause shooting flame impingement or overheating of the
AC2030
Manifold Pressure
in W.C.
3.4
combustion chamber. Before starting natural gas input
check, obtain the heating value of gas (BTU per cubic foot)
at standard conditions from your local gas supplier.
To measure the input, using the gas meter, proceed as
follows:
1.
Turn off gas supply to all other appliances except
the furnace.
2.
With the furnace operating, time the smallest dial on
the meter for one complete revolution. If this is a
2-cubic-foot dial, divide the seconds by 2. If it is a
1-cubic-foot dial, use the time in seconds as is. This
gives the seconds per cubic foot of gas being delivered
to the furnace.
3.
Assuming natural gas with a heating value of 1,000 BTU
per cubic foot and 34-seconds per cubic foot used as
determined by step (2), then: Seconds per hour = 3,600
Input = 1,000 x 3,600 / 34 = 106,000 BTU/hr. This
measured input must not be greater than the input
indicated on the nameplate of the furnace.
4.
Relight all other appliances turned off in Step 1 above.
Be sure all pilots are operating.
CHECK THERMOSTAT
Check thermostat operation. The thermostat will turn
on the furnace when room temperature falls 2˚F below
the thermostat set point for more than 1 minute. The
thermostat will turn off the furnace when the room
temperature is more than 1˚F over set point for more
than 1 minute.
CHECK CONTROL WIRING CONNECTIONS
Refer to wiring digram on page 32.
BURNER FLAME CHARACTERISTICS
Start the furnace and let it operate at least ten minutes.
Observe the flame from the Sight Window. The flame
should turn to blue color with scattered dots of yellow color
within 2 minutes of ignition. Limit your movements near the
furnace for a few more minutes before making your final
observations. The flame may look yellow due to dust particles
in the room air or a clogged filter on the combustion fan. An
occasional flash of orange might be seen as dust particles
burn in the flame. This is normal. No burner adjustment is
provided, or is necessary. Figure 20.
FIGURE 20 – BURNER FLAME CHARACTERISTICS
BLUE FLAME
CANNOLO BURNER
CARMEL
TM
AC2030TNA TOP VENT GAS WALL HEATER
21
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