Table 16. Gas heating capacity altitude correction factors
Sea Level To
2000
Capacity Multiplier
1.00
Note: Correction factors are per AGA Std. 221.30 - 1964, Part VI, 6.12. Local codes may supersede.
Table 17. Natural gas -2–stage and modulating gas heat settings
Burner Size
235 MBH 2-stg
350 MBH 2-stg
500 MBH 2-stg
500 MBH Mod
800 MBH 2-stg
(b)
800 MBH Mod
(b)Installation_
Connect Gas Supply Line to Furnace
Gas Train
850 MBH 2-stg
850 MBH Mod
1000 MBH 2-stg
1000 MBH Mod
Note: P0, P1, and P2 are fan speed settings in the Seimens controller. The default speeds have been preset at the factory and normally do not
need field adjustment.
(a)
binary input for 2-stage
(b)
800MBH is Horizontal Discharge. MBH is listed on gas heat rating plate.
Table 18. LP gas – 2-stage and modulating gas heat settings
Burner Size
235 MBH 2-stg
350 MBH 2-stg
500 MBH 2-stg
500 MBH Mod
800 MBH 2-stg
(b)
800 MBH Mod
(b)
850 MBH 2-stg
RT-SVX072A-EN
2001 to
2500
.92
Low Fire
VDC
Input
P0
Signal
(a)
n/a
1780
n/a
2200
n/a
2900
0
1900
n/a
2280
0
1130
n/a
2290
0
1130
n/a
2800
0
1200
Propane
Low Fire
VDC
Input
P0
P1
Signal
(a)
n/a
1930
1930
n/a
2050
2050
n/a
2650
2650
0
1900
1900
n/a
2100
2100
0
1150
1150
n/a
2290
2290
Altitude (Ft.)
2501 to
3501 to
3500
4500
.88
.84
Natural Gas
High Fire
VDC
Input
P1
Signal
1780
10
2200
10
2900
10
1900
10
2280
10
1130
10
2290
10
1130
10
2800
10
1200
10
High Fire
VDC
Input
P2
Signal
10
3380
10
3300
10
4600
10
4600
10
3760
10
3680
10
3930
4501 to
5501 to
5500
6500
.80
.76
Shutter
Setting
P2
3250
1
3650
0.5
4900
1.5
4900
1.5
3950
4.5
3950
4
4070
3
4150
3
5150
3
5150
3
Ratio
Shutter
Regulator
Setting
Turns
1.5
4 1/4
1.5
4
1
4 1/2
1
4 1/2
2.5–3
4 7/8
3
5
2.5
5
I I n n s s t t a a l l l l a a t t i i o o n n
6501 to
7500
.72
Ratio
Regulator
Turns
5 1/2
4 1/2
4
4
4 7/8
4 7/8
5 1/2
5
4 3/4
4.75
Orifice Size
0.302
0.396
0.396
0.516
0.516
0.516
0.516
43
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