59SP6A: Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
60
Table 20 – Orifice Size and Manifold Pressure (In. W.C.) for Gas
Input Rate
A11253A
A11253B
A200285
Fig. 68 – Service Label Information
Check Safety Controls
The flame sensor, gas valve, and pressure switch were all checked in the
Start-up procedure section as part of normal operation.
1. Check Main Limit Switch
This control shuts off combustion system and energizes
air-circulating blower motor, if furnace overheats. By using this
method to check limit control, it can be established that limit is
functioning properly and will operate if there is a restricted
return-air supply or motor failure. If limit control does not function
during this test, cause must be determined and corrected.
a. Run furnace for at least 5 minutes.
b. Gradually block off return air with a piece of cardboard or sheet
metal until the limit trips.
c. Unblock return air to permit normal circulation.
d. Burners will re-light when furnace cools down.
2. Check Pressure Switch(es)
This control proves operation of the draft inducer blower.
a. Turn off 115-v power to furnace.
b. Disconnect inducer motor lead wires from wire harness.
c. Turn on 115-v power to furnace.
S
A
G
L
A
R
U
T
A
N
F
O
Y
T
I
V
A
R
G
C
I
F
I
C
E
P
S
S
A
G
.
G
V
A
HEAT VALUE
0.58
0.60
0.62
0.64
AT ALTITUDE
Orifice
Manifold
Orifice
Manifold
Orifice
Manifold
Orifice
Manifold
(Btu/cu ft)
No.
Pressure
No.
Pressure
No.
Pressure
No.
Pressure
900
43
3.8
42
3.2
42
3.3
42
3.4
0
925
43
3.6
43
3.7
43
3.8
42
3.2
(0)
950
43
3.4
43
3.5
43
3.6
43
3.7
975
44
3.7
44
3.8
43
3.4
43
3.6
to
1000
44
3.5
44
3.6
44
3.8
43
3.4
1025
44
3.3
44
3.5
44
3.6
44
3.7
2000
1050
44
3.2
44
3.3
44
3.4
44
3.5
(610)
1075
45
3.7
45
3.8
44
3.3
44
3.4
1100
46
3.7
46
3.8
45
3.8
44
3.2
U.S.A.
800
42
3.4
42
3.5
42
3.6
42
3.7
2001 (611)
825
43
3.8
42
3.3
42
3.4
42
3.5
to
850
43
3.6
43
3.7
42
3.2
42
3.3
3000 (914)
875
43
3.4
43
3.5
43
3.7
43
3.8
900
44
3.7
44
3.8
43
3.5
43
3.6
Canada
925
44
3.5
44
3.6
44
3.8
43
3.4
2001 (611)
950
44
3.3
44
3.4
44
3.6
44
3.7
to
975
44
3.2
44
3.3
44
3.4
44
3.5
4500 (1372)
1000
44
3.0
44
3.1
44
3.2
44
3.3
775
42
3.3
42
3.4
42
3.5
42
3.6
3001
800
43
3.8
42
3.2
42
3.3
42
3.4
(915)
825
43
3.6
43
3.7
43
3.8
42
3.2
850
44
3.8
43
3.5
43
3.6
43
3.7
875
44
3.6
44
3.7
43
3.4
43
3.5
4000
900
44
3.4
44
3.5
44
3.7
44
3.8
(1219)
925
44
3.2
44
3.4
44
3.5
44
3.6
950
44
3.1
44
3.2
44
3.3
44
3.4
750
42
3.3
42
3.4
42
3.5
42
3.6
4001
775
43
3.7
43
3.8
42
3.3
42
3.4
(1220)
800
43
3.5
43
3.6
43
3.7
43
3.8
825
44
3.8
43
3.4
43
3.5
43
3.6
850
44
3.5
44
3.7
44
3.8
43
3.4
5000
875
44
3.3
44
3.5
44
3.6
44
3.7
(1524)
900
44
3.2
44
3.3
44
3.4
44
3.5
925
44
3.0
44
3.1
44
3.2
44
3.3
725
42
3.2
42
3.3
42
3.4
42
3.5
5001
750
43
3.7
43
3.8
42
3.2
42
3.3
(1525)
775
43
3.4
43
3.5
43
3.7
43
3.8
800
44
3.7
44
3.8
43
3.4
43
3.5
825
44
3.5
44
3.6
44
3.7
44
3.8
6000
850
44
3.3
44
3.4
44
3.5
44
3.6
(1829)
875
44
3.1
44
3.2
44
3.3
44
3.4
900
44
2.9
44
3.0
44
3.1
44
3.2
675
42
3.4
42
3.5
42
3.6
42
3.8
6001
700
42
3.2
42
3.3
42
3.4
42
3.5
(1830)
725
43
3.6
43
3.7
43
3.8
42
3.3
750
43
3.4
43
3.5
43
3.6
43
3.7
775
44
3.6
44
3.7
43
3.4
43
3.5
7000
800
44
3.4
44
3.5
44
3.6
44
3.7
(2133)
825
44
3.2
44
3.3
44
3.4
44
3.5
850
44
3.0
44
3.1
44
3.2
44
3.3
to
to
to
to
ALTITUDE
RANGE
ft (m)
U
.S
.A
.
an
d
C
an
ad
a
SINGLE
-
STAGE FURNACE
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
U
.S.A
.
O
n
ly
U.
S
.A
.
O
n
ly
U.
S
.A
.
O
n
ly
U
.S.A
.
O
nly
U
.S.A
.
a
nd
C
a
na
da
S
A
G
L
A
R
U
T
A
N
F
O
Y
T
I
V
A
R
G
C
I
F
I
C
E
P
S
S
A
G
.
G
V
A
HEAT VALUE
0.58
0.60
0.62
0.64
AT ALTITUDE
Orifice
Manifold
Orifice
Manifold
Orifice
Manifold
Orifice
Manifold
(Btu/cu ft)
No.
Pressure
No.
Pressure
No.
Pressure
No.
Pressure
ALTITUDE
RANGE
ft (m)
SINGLE
-
STAGE FURNACE
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
650
42
3.4
42
3.5
42
3.6
42
3.7
7001
675
43
3.8
42
3.2
42
3.3
42
3.4
(2134)
700
43
3.5
43
3.7
43
3.8
42
3.2
725
44
3.8
43
3.4
43
3.5
43
3.6
750
44
3.5
44
3.7
44
3.8
43
3.4
8000
775
44
3.3
44
3.4
44
3.5
44
3.7
(2438)
800
44
3.1
44
3.2
44
3.3
44
3.4
825
44
2.9
44
3.0
44
3.1
44
3.2
625
42
3.4
42
3.5
42
3.6
42
3.7
8001
650
43
3.8
42
3.2
42
3.3
42
3.4
(2439)
675
43
3.5
43
3.6
43
3.7
42
3.2
700
44
3.7
43
3.4
43
3.5
43
3.6
725
44
3.5
44
3.6
44
3.7
44
3.8
9000
750
44
3.3
44
3.4
44
3.5
44
3.6
(2743)
775
44
3.0
44
3.2
44
3.3
44
3.4
9001
600
42
3.3
42
3.4
42
3.6
42
3.7
(2744)
625
43
3.7
42
3.2
42
3.3
42
3.4
650
43
3.5
43
3.6
43
3.7
43
3.8
675
44
3.7
44
3.8
43
3.4
43
3.5
10000
700
44
3.4
44
3.5
44
3.7
44
3.8
(3048)
725
44
3.2
44
3.3
44
3.4
44
3.5
* Orifice numbers shown in
BOLD
are factory-installed.
to
to
to
U.
S
.A.
On
ly
U.
S
.A.
On
ly
U.
S
.A.
On
ly
