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Benchmark 750-3000 Installation & Startup Manual
SECTION 2 – INSTALLATION
2.14 BENCHMARK PUMP RELAY
All Benchmark models ship with a pump relay (P/N 69102-2 for BMK750/1000, 69102-3 for
BMK1500-3000) as standard equipment. The pump relay allows the user to turn a pump on/off
and open/close a motorized valve as the boiler cycles on and off on demand. The Pump Delay
Timer feature allows the user to keep the pump running and keep the motorized valve open for
up to 30 minutes after the boiler has shut down and the demand is satisfied.
The pump relay is attached to the outside of the power box, as shown below. Boilers equipped
with the pump relay have a label on the power box cover adjacent to the relay.
PUMP RELAY
Figure 2-12a: BMK 750/1000 Pump Relay Location
PUMP RELAY
Figure 2-12b: BMK 1500/2000/2500-3000 Pump Relay Location (BMK 25000/3000 Shown)
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5/9/2019
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POWER BOX
POWER BOX
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