Technical information

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Servicing should only be performed by a Qualied Service Technician
PRESSURE SWITCHES – ALL MODELS
All 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.
BCL3 MODELS PRESSURE SWITCHES
PRESSURE SWITCHES Model Setpoint (WC) Tolerance (WC)
Blocked Inlet Switch BCL3 95T199 6NOX -0.67" +0.03"/-0.05"
(A)BCL3 85T275 6NOX -0.59" +0.03"/-0.05"
(A)BCL3 85T390 6NOX -1.00" +0.03"/-0.05"
Blocked Outlet Switch BCL3 95T199 6NOX +4.80" +/-0.10"
(A)BCL3 85T275 6NOX +2.65" +/-0.10"
(A)BCL3 85T390 6NOX +5.35" +/-0.10"
Blower Prover Switch BCL3 95T199 6NOX +0.38" +0.01"/-0.07"
(A)BCL3 85T275 6NOX/
(A)BCL3 85T390 6NOX
+0.46" +0.02"/-0.06"
Blocked Inlet Switch
Blocked Outlet Switch
Blower Prover Switch