Start-Up Procedure - COZY C255H Manual Del Propietário

FACE PANEL-MOUNTED THERMOSTAT INSTALLATION
1. Before removing the face panel, disconnect the
thermostat wires at the gas valve.
2. Locate the knockout on the right side of the furnace
to mount the thermostat. Remove the knockout by
tapping it lightly with a screwdriver Figure 18 It will
also be necessary to cut a 1/2 inch hole in the inside
panel insulation for clearance to the knockout.
3. Cut the thermostat wire to 56 inches.
4. Connect the thermostat wires to terminal screws on
the thermostat base.
5. Feed the thermostat wires through the knockout and
route them through the metal clip to the gas valve.
6. Mount the thermostat to the side of the cabinet with
screws provided.
7. Replace the thermostat cover.
8. Connect the thermostat wires to the control valve as
shown in Figure 17.
FIGURE 18 – THERMOSTAT MOUNTING PANEL
IMPORTANT: Keep the thermostat wires away from the
combustion chamber.

START-UP PROCEDURE

WARNING: Danger of property damage, bodily injury or
loss of life. propane gas is heavier than air and may settle
in any low area, including open depressions and may
remain there unless area is ventilated. Never attempt
start&up of unit before thoroughly ventilating the area.
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).
20
COZY TOP VENT GRAVITY GAS WALL HEATER
INSTALLING YOUR FURNACE
CHECK GAS INPUT AND PRESSURES
For furnaces located at elevations between sea level and 2,000
feet, the measured input must not be greater than the input
shown on the nameplate of the furnace. For elevations above
2,000 feet, the measured input must not exceed the input on
the nameplate reduced by 4 percent for each 1,000 feet that the
furnace is above sea level.
Gas supply pressure and manifold pressure with the burner(s)
operating must also be as specified on the nameplate.
Rated input will be obtained on a heating value of 2,500 BTU/
hr. for propane at 10-inches manifold pressure with factory-
sized orifices. If propane gas having a different heating value
is supplied, orifices must be changed by a qualified service
technician before the furnace is operated.
CHECK THE MANIFOLD GAS PRESSURE
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 and pilot operating. 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 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
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.
TYPE OF GAS
NATURAL
PROPANE
MANIFOLD PRESSURE, IN. W.C.
4.0
10.0