State SBL85 390NE A - Manual (Page 24)

22 Servicing should only be performed by a Qualified Service Technician
PRESSURE SWITCHES – ALL MODELS
All SBL models are provided with three pressure switches. These switches are essential to the safe and proper
operation of the unit. The switches are wired to the Ignition control in series. It is important to understand the
purpose of each switch.
SBL MODELS PRESSURE SWITCHES
PRESSURE SWITCHES Model Setpoint (WC) Tolerance (WC)
Blocked Inlet Switch SBL95 199NE -0.67" +0.03"/-0.05"
SBL85 275NE(A) -0.59" +0.03"/-0.05"
SBL85 390NE(A) -1.00" +0.03"/-0.05"
Blocked Outlet Switch SBL95 199NE +4.80" +/-0.10"
SBL85 275NE(A) +2.65" +/-0.10"
SBL85 390NE(A) +5.35" +/-0.10"
Blower Prover Switch SBL95 199NE +0.38" +0.01"/-0.07"
SBL85 275NE(A)/
SBL85 390NE(A)
+0.46" +0.02"/-0.06"
Blocked Inlet Switch
Blocked Outlet Switch
Blower Prover Switch