Start-Up Heating And Make Adjustments; Check Heating Control; Check Gas Input; Adjust Gas Input - Bryant 582A Installation, Start-Up, And Operating Instructions Manual

MANIFOLD
Fig. 13—Burner Assembly
Fig. 14—Monoport Burner
2. Repair leak following Refrigerant Service procedures.
NOTE: Install a filter drier whenever the system has been opened
for repair.
3. Add a small charge of R-22 refrigerant vapor to system and
leak-test unit.
4. Recover refrigerant from refrigerant system and evacuate to
500 microns if additional leaks are not found.
5. Charge unit with R-22 refrigerant, using a volumetric-
charging cylinder or accurate scale. Refer to unit rating
plate for required charge. Be sure to add extra refrigerant to
compensate for internal volume of filter drier.
II. START-UP HEATING AND MAKE ADJUSTMENTS
CAUTION: Complete the required procedures given in
the Pre-Start-Up section before starting the unit.
Do not jumper any safety devices when operating the unit.
Make sure that burner orifices are properly aligned. Unstable
operation may occur when the burner orifices in the manifold are
misaligned.
Follow the lighting instructions on the heating section operation
label (located inside the burner or blower access door) to start the
heating section.
PIPE PLUG
C99019
BURNER FLAME
BURNER
MANIFOLD
C99021
NOTE: Make sure that gas supply has been purged, and that all
gas piping has been checked for leaks.
A. CHECK HEATING CONTROL
Start and check the unit for proper heating control operation as
follows (see furnace lighting instructions located inside burner or
blower access panel):
1. Place room thermostat SYSTEM switch in the HEAT
position and the fan switch is placed in AUTO. position.
2. Set the heating temperature control of the thermostat above
room temperature.
3. The induced-draft motor will start.
4. After a call for heating, the main burner should light within
5 sec. If the burners do not light, there is a 22-sec. delay
before another 5-sec. try. If the burners still do not light, this
sequence is repeated. If the burners do not light within 15
minutes from the initial call for heat, there is a lockout. To
reset the control, break the 24-v power to W.
5. The evaporator fan will turn on 45 sec. after the flame has
been established. The evaporator fan will turn off 45 sec.
after the thermostat has been satisfied.
B. CHECK GAS INPUT
Check gas input and manifold pressure after unit start-up (See
Table 6). If adjustment is required proceed as follows:
• The rated gas inputs shown in Table 6 are for altitudes from sea
level to 2000 ft above sea level. These inputs are based on
natural gas with a heating value of 1050 Btu/ft
gravity, or propane gas with a heating value of 2500 Btu/ft
1.5 specific gravity.
• For elevations above 2000 ft, reduce input 4 percent for each
1000 ft above sea level.
• When the gas supply being used has a different heating value or
specific gravity, refer to national and local codes, or contact
your distributor to determine the required orifice size.
CAUTION: These units are designed to consume the
rated gas inputs using the fixed orifices at specified
manifold pressures as shown in Table 6. DO NOT
REDRILL THE ORIFICES UNDER ANY CIRCUM-
STANCES.
C. ADJUST GAS INPUT
The gas input to the unit is determined by measuring the gas flow
at the meter or by measuring the manifold pressure. Measuring the
gas flow at the meter is recommended for natural gas units. The
manifold pressure must be measured to determine the input of
propane gas units.
MEASURE GAS FLOW (NATURAL GAS UNITS)
Minor adjustment to the gas flow can be made by changing the
manifold pressure. The manifold pressure must be maintained
between 3.4 and 3.6 in. wg. If larger adjustments are required,
change main burner orifices following the recommendations of
national and local codes.
NOTE: All other appliances that use the same meter must be
turned off when gas flow is measured at the meter.
Proceed as follows:
1. Turn off gas supply to unit.
2. Remove pipe plug on manifold (See Fig. 13) and connect
manometer. Turn on gas supply to unit.
3. Record number of seconds for gas meter test dial to make
one revolution.
—15—
3
at 0.65 specific
3
at