24
I-UBX-UBZ-UDX-UDZ (03-21) 1034344-0
CONTROLS—CONTINUED
Pressure Switch—Continued
• If a restriction or excessive flue length/turns cause the sensing pressure to be outside the pressure switch setpoint,
the switch will function to shut off the main burner. The main burner will remain off until the system has cooled
and/or the flue system resistance is reduced.
• Pressure switch settings are listed in Table 16.
Table 16. Pressure Switch Settings
UBX and UDX Models
Unit Size
Negative Pressure (IN WC)
Label Color Switch PN
Startup Cold Equilibrium Hot Setpoint OFF Setpoint ON
030 1.20 0.90 0.30 0.45 Orange 1034349
045 (UBX) 1.00 0.80 0.25 0.40 Red 1034477
045 (UDX) 1.00 0.80 0.40 0.55 Green 197030
060 0.90 0.80 0.35 0.50 Purple 197031
075 0.80 0.70 0.45 0.60 Pink 197032
100 0.90 0.70 0.50 0.65 Orange 196388
125 1.40 1.00 0.70 0.85 Wine 1034237
150 0.70 0.60 0.35 0.50 Purple 197031
175 0.80 0.70 0.40 0.55 Green 197030
200, 225 2.30 1.60 1.10 1.30 Blue 201158
250 2.70 1.80 1.10 1.30 Blue 201158
300 2.50 1.90 1.10 1.30 Blue 201158
350, 400 2.10 1.60 1.10 1.30 Blue 201158
UBZ and UDZ Models
Unit Size
Differential Pressure (IN WC)
Label Color Switch PN
Startup Cold Equilibrium Hot Setpoint OFF Setpoint ON
030 (UBZ) 1.20 0.90 0.30 0.45 Orange 1034349
030 (UDZ) 1.20 0.90 0.40 0.55 Green 197030
045 (UBZ) 1.00 0.80 0.35 0.50 Purple 197031
045 (UDZ) 1.00 0.80 0.40 0.55 Green 197030
060 1.20 0.80 0.35 0.50 Purple 197031
075 1.00 0.80 0.45 0.60 Pink 197032
100 0.90 0.80 0.50 0.65 Orange 196388
125 (UBZ) 1.30 1.00 0.70 0.85 Wine 1034237
125 (UDZ) 1.30 1.00 0.80 0.95 Gray 197078
150 0.70 0.55 0.35 0.50 Purple 197031
175 0.75 0.65 0.40 0.55 Green 197030
200 2.60 1.80 1.10 1.30 Blue 201158
225 2.50 1.60 1.10 1.30 Blue 201158
250 2.60 1.80 1.10 1.30 Blue 201158
300 (UBZ) 2.70 1.85 1.10 1.30 Blue 201158
300 (UDZ) 2.70 1.85 1.30 1.50 White 201161
350 2.25 1.80 1.50 1.70 Yellow 273360
400 2.10 1.60 1.30 1.50 White 201161
To Next Page
Loading...
Need help?
General
