Benchmark 2.0 LN Installation, Operation & Maintenance Manual
CHAPTER 2 – INSTALLATION
Page 32 of 168 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0046_0J
06/18/2015 Phone: 800-526-0288 GF-123
AERCO recommends that the temporary air filter be cut from a McMaster-Carr part no. 2122K315
Polyester Air Filter Roll Tackfield, ½” thick, 16” wide, or equivalent. Cover the Benchmark 2.0LN air
inlet with the blue side of the filter material facing outward to hold the dust on the outside surface.
Maximize the surface area of the filter covering the 8" diameter opening by creating a dome out of
the filter material.
Cover the flared duct opening with the blue side facing outward. During construction check the filter
for dust accumulation and replace it when the accumulation becomes noticeable.
2.13 BENCHMARK PUMP RELAY OPTION
An optional Benchmark 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 Benchmark pump relay (SPDT) contact is rated for:
• 10 A Resistive @ 277 VAC/28 VDC
• 1/3 HP N/O @ 120/240 VAC
• 1/6 HP N/C @ 120/240 VAC
• 480 VA Pilot Duty @ 240-277 VAC
If pump/valve load exceeds the above contact ratings, use a separate contact relay. See Diagrams
2-1a and 2-1b.
To identify if the boiler is equipped with the BMK Pump Relay Option (part no. 69102), look for the
label and relay as shown in Figure 2-12.
Diagram 2-1a: Schematic – System Pump Start using Boiler Pump Relay
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