Air Flow Fault Tests-Blower Proof & Blocked Inlet Switches; Blower Proof Switch Test - Watts AERCO Benchmark BMK5000 Operation And Service Manual

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 5 – SAFETY DEVICE TESTING
5.8 AIR FLOW FAULT TESTS-BLOWER PROOF & BLOCKED INLET
SWITCHES
These tests check the operation of the Blower Proof switch and Blocked Inlet switch shown in
Figure 5-6a, 5-6b and 5-6c.

5.8.1 Blower Proof Switch Test

BLOWER
PROOF
SWITCH
BLOCKED
INLET
SWITCH
Figure 5-6a: Blower Proof & Blocked Inlet Switch Locations – BMK1500 – 5000N
BLOWER PROOF
SWITCH
Figure 5-6b: Blower Proof & Blocked Inlet Switch Locations – BMK750 &1000
OMM-0137_J •
12/20/2022
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MANUAL
SHUT-OFF
VALVE
SSOV
BLOCKED
INLET SWITCH
MANUAL
SHUT-OFF
VALVE
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