Reznor YDSA Unit Installation Manual - Manual (Page 51)

Form I-Y, P/N 273646R6, Page 51
Gas Pressure Safety
Switches, Option BP4
See Manifold illustrations,
FIGURE 23, page 39, or
FIGURE 24A, page 43.
The optional gas pressure switches are safety controls designed to protect the mani-
fold and burner from extreme upstream gas piping system failures that would cause an
increase or decrease in the regulated gas pressure.
The low gas pressure switch is an automatic reset which is set to activate if the gas
pressure is 50% of the minimum as stated on the rating plate.
The high gas pressure switch is a manually reset switch that is set to activate if the gas
pressure is 125% of the manifold pressure stated on the rating plate.
BTUH Inputs and Capacities by Altitude in Canada
Altitude
Normal
Input
Thermal
Output
Capacity
2-Stage
Minimum Input
(Applies to
AG71)
5:1 Modulation
Minimum Input
(Applies to
AG73)
Normal
Input
Thermal
Output
Capacity
2-Stage
Minimum Input
(Applies to
AG71)
5:1 Modulation
Minimum Input
(Applies to
AG73)
Normal
Input
Thermal
Output
Capacity
2-Stage
Minimum Input
(Applies to
AG71)
5:1 Modulation
Minimum Input
(Applies to
AG73)
Feet Meters H50 H75 H100
0-2000 0-610 50,000 40,000 N/A 10,000 75,000 60,000 N/A 15,000 100,000 80,000 50,000 20,000
2001-4500 611-1373 45,000 36,000 N/A 9,000 67,500 54,000 N/A 13,500 90,000 72,000 45,000 18,000
Feet Meters H200 H300 H400
0-2000 0-610 200,000 160,000 100,000 40,000 300,000 240,000 150,000 60,000 400,000 320,000 200,000 80,000
2001-4500 611-1373 180,000 144,000 90,000 36,000 270,000 216,000 135,000 54,000 360,000 288,000 180,000 72,000
BTUH Inputs and Capacities by Altitude in Canada
Altitude
Normal
Input
Thermal
Output
Capacity
4-Stage
Minimum Input
(Applies to
AG72)
10:1 Modula-
tion Minimum
Input (Applies
to AG74)
Normal
Input
Thermal
Output
Capacity
4-Stage
Minimum Input
(Applies to
AG72)
10:1 Modula-
tion Minimum
Input (Applies to
AG74)
Normal
Input
Thermal
Output
Capacity
4-Stage
Minimum Input
(Applies to
AG72)
10:1 Modula-
tion Minimum
Input (Applies to
AG74)
Feet Meters H102 H125 H150
0-2000 0-610 100,000 80,000 25,000 10,000 125,000 100,000 25,000 15,000 150,000 120,000 37,500 15,000
2001-4500 611-1373 90,000 72,000 22,500 9,000 112,500 90,000 22,500 13,500 135,000 108,000 33,750 13,500
Feet Meters H175 H202 H402
0-2000 0-610 175,000 140,000 50,000 20,000 200,000 160,000 50,000 20,000 400,000 320,000 100,000 40,000
2001-4500 611-1373 157,500 126,000 33,750 18,000 180,000 144,000 45,000 18,000 360,000 288,000 90,000 36,000
Feet Meters H502 H602 H702
0-2000 0-610 500,000 400,000 150,000 60,000 600,000 480,000 150,000 60,000 700,000 560,000 175,000 70,000
2001-4500 611-1373 450,000 360,000 90,000 54,000 540,000 432,000 135,000 54,000 630,000 504,000 157,500 63,000
Feet Meters H802
0-2000 0-610 800,000 640,000 200,000 80,000
2001-4500 611-1373 720,000 576,000 180,000 72,000
BTUH Inputs and Capacities by Altitude in Canada
Altitude
Normal
Input
Thermal
Output
Capacity
2-Stage
Minimum Input
(Applies to
AG71)
5:1 Modulation
Minimum Input
(Applies to
AG73)
Normal
Input
Thermal
Output
Capacity
2-Stage
Minimum Input
(Applies to
AG71)
5:1 Modulation
Minimum Input
(Applies to
AG73)
Normal
Input
Thermal
Output
Capacity
2-Stage
Minimum Input
(Applies to
AG71)
5:1 Modulation
Minimum Input
(Applies to
AG73)
Feet Meters G150 G225 G300
0-2000 0-610 150,000 136,500 75000 30,000 225,000 204,750 112500 45,000 300,000 273,000 150,000 60,000
2001-4500 611-1373 135,000 122,850 67500 27,000 202,500 184,275 101250 40,500 270,000 245,700 135,000 54,000
BTUH Inputs and Capacities by Altitude in Canada
Altitude
Normal
Input
Thermal
Output
Capacity
4-Stage
Minimum Input
(Applies to
AG72)
10:1 Modula-
tion Minimum
Input (Applies
to AG74)
Normal
Input
Thermal
Output
Capacity
4-Stage
Minimum Input
(Applies to
AG72)
10:1 Modula-
tion Minimum
Input (Applies to
AG74)
Normal
Input
Thermal
Output
Capacity
4-Stage
Minimum Input
(Applies to
AG72)
10:1 Modula-
tion Minimum
Input (Applies to
AG74)
Feet Meters G302 G372 G452
0-2000 0-610 300,000 273,000 75,000 30,000 375,000 341,250 112,500 45,000 450,000 409,500 112,500 45,000
2001-4500 611-1373 270,000 245,700 67,500 27,000 337,500 307,125 67,500 40,500 405,000 368,550 101,250 40,500
Feet Meters G525 G602
0-2000 0-610 525,000 477,750 131,250 52,500 600,000 546,000 150,000 60,000
2001-4500 611-1373 472,500 429,975 118,125 47,250 540,00 491,400 135,000 54,000