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Servicing should only be performed by a Qualified Service Technician
PRESSURE SWITCHES – ALL MODELS
All SBL models are provided with two 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.
PRESSURE SWITCHES
PRESSURE SWITCHES
Model
Setpoint (WC)
Tolerance (WC)
Blower Prover Switch
SBL85275NE(A) - SBL85390NE(A)
+0.32"
+/-0.04"
Blocked Outlet Switch
SBL85275NE(A)
+2.50"
+/-0.10"
SBL85310NE(A)
+3.50"
+/-0.10"
SBL85366NE(A)
+4.80"
+/-0.10"
SBL85390NE(A)
+5.10"
+/-0.10"
Blocked Outlet Switch
Blower Prover Switch
Summary of Contents for SBL85275NE
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