Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 2 – INSTALLATION
OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 41 of 122
2.14 BENCHMARK PUMP RELAY
All Benchmark units ship with a pump relay (P/N 69102-2 for BMK 750 & 1000, 69102-3 for
BMK 1500 - 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.
Figure 2-12a: BMK 750/1000 Pump Relay Location
Figure 2-12b: BMK 1500/2000/2500-3000 Pump Relay Location (BMK 25000/3000 Shown)
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