Check Burner Flame - Carrier 48VL-D Installation Instructions Manual

Nameplate
0 to 2000 ft
Input (Btu/hr)
(0--- 610 m)
40000 40000
60000 60000
90000 90000
115000 115000
127000 127000
*In the U.S.A., the input rating for altitudes above 2000 ft (610m) must be reduced by 4% for each 1000 ft (305 m) above sea level.
In Canada, the input rating for altitudes from 2001 to 4500 ft (611 to 1372 m) above sea level must be derated by 10% by an authorized gas conversion station or
dealer.
For Canadian Installations from 2000 to 4500 ft (610 ---1372 m), use U.S.A. column 2001 to 3000 ft (611 to 914 m).
Nameplate
0 to 2000 ft
Input (Btu/hr)
(0--- 610 m)
40000 40000
60000 60000
90000 90000
115000 115000
130000 130000
*In the U.S.A., the input rating for altitudes above 2000 ft (610m) must be reduced by 4% for each 1000 ft (305 m) above sea level.
In Canada, the input rating for altitudes from 2001 to 4500 ft (611 to 1372 m) above sea level must be derated by 10% by an authorized gas conversion station or
dealer.
For Canadian Installations from 2000 to 4500 ft (610 ---1372 m), use U.S.A. column 2001 to 3000 ft (611 to 914 m).
HEATING INPUT NUMBER OF NUMBER OF
(BTUH) ORIFICES ORIFICES
40,000 2
60,000 3
90,000 3
115,000
3
130,000 3
*When a unit is converted to propane, different size orifices must be used. See separate, natural ---to ---propane conversion kit instructions.
Based on altitudes from sea level to 2000 ft (610 m) above sea level. In U.S.A. for altitudes above 2000 ft (610 m), reduce input rating 4 percent for each addi-
{
tional 1000 ft (305 m) above sea level. In Canada, from 2000 ft (610 m) above sea level to 4500 ft (1372 m) above sea level, derate the unit 10 percent.
EXAMPLE: Assume that the size of test dial is 1 cu ft, one
revolution takes 32 sec, and the heating value of the gas is 1050
3
Btu/ft . Proceed as follows:
1. 32 sec. to complete one revolution.
2. 3600  32 = 112.5.
3
3. 112.5 x 1 =112.5 ft of gas flow/hr.
4. 112.5 x 1050 = 118,125 Btuh input.
If the desired gas input is 115,000 Btuh, only a minor change in the
manifold pressure is required.
Observe manifold pressure and proceed as follows to adjust gas
input:
1. Remove regulator cover screw over plastic adjustment
screw on gas valve (See Fig. 13).
2. Turn plastic adjustment screw clockwise to increase gas
input, or turn plastic adjustment screw counterclockwise to
decrease input (See Fig. 13). Manifold pressure must be
between 3.2 and 3.8 IN. WC.
WARNING
!
FIRE AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal
injury or death and/or property damage.
Unsafe operation of the unit may result if manifold pressure
is outside this range.
Table 4 – High Altitude Compensation, Natural Gas - - Single Phase Models
Rated Heating Input (Btu/hr), Natural Gas at Installation Altitude Above Sea Level, U.S.A.*
2001 to 3000 ft*
(611 to 914 m)
36000
54000
81000
103500
114300
Table 5 – High Altitude Compensation, Natural Gas - - Three Phase
Rated Heating Input (Btu/hr), Natural Gas at Installation Altitude Above Sea Level, U.S.A.*
2001 to 3000 ft*
(611 to 914 m)
36000
54000
81000
103500
117000
Table 6 – Heating Inputs
GAS SUPPLY PRESSURE (IN. W.C.)
Natural{
Min Max
4.0 13.0
4.0 13.0
4.5 13.0
4.5 13.0
4.5 13.0
3001 to 4000 ft 4001 to 5000 ft
(915 to 1219 m) (1220 to 1524 m)
34400 32800
51600 49200
77400 73800
98900 94300
109200 104100
3001 to 4000 ft 4001 to 5000 ft
(915 to 1219 m) (1220 to 1524 m)
34400 32800
51600 49200
77400 73800
98900 94300
111800 106600
Propane*{
Min Max
11.0 13.0
11.0 13.0
11.0 13.0
11.0 13.0
11.0 13.0
3. Replace regulator cover screw on gas valve (See Fig. 13).
4. Turn off gas supply to unit. Remove manometer from
pressure tap and replace pipe plug on gas valve. (See Fig.
11.) Turn on gas to unit and check for leaks.
Measure Manifold Pressure (Propane Units)
Refer to propane kit installation instructions for properly checking
gas input.
NOTE: For installations below 2,000 ft (610 m), refer to the unit
rating plate for proper propane conversion kit. For installations
above 2,000 ft (610 m), contact your distributor for proper propane
conversion kit.

Check Burner Flame

With control access panel (see Fig. 20) removed, observe the unit
heating operation. Watch the burner flames to see if they are light
blue and soft in appearance, and that the flames are approximately
the same for each burner. Propane will have blue flame (See Fig.
12). Refer to the Maintenance section for information on burner
removal.
15
5001 to 6000 ft
(1524 to 1829 m)
31200
46800
70200
89700
99100
5001 to 6000 ft
(1524 to 1829 m)
31200
46800
70200
89700
101400
MANIFOLD PRESSURE MANIFOLD PRESSURE
(IN. W.C.)
Natural{ Propane*†
3.23.8 10.0
3.23.8 10.0
3.23.8 10.0
3.23.8 10.0
3.23.8 10.0