Low Water Cutoff (Lwco) - Standard C-More Test; Shutting Boiler Down For Extended Period; Placing The Boiler Back In Service After Aprolonged Shutdown - Aerco Benchmark BMK 750 User Manual

Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
SECTION 4 – MAINTENANCE

4.9.2 Low Water Cutoff (LWCO) - Standard C-More Test

Perform the standard Low Water Cutoff test using the C-More controls as described below.
Low Water Cutoff (LWCO) - Standard C-More Test Instructions
1. Turn the AC power to the unit to the ON position.
2. Press the TEST switch on the C-More Controller and confirm that the blinking LOW
WATER LEVEL message appears on the C-More display within 4 seconds.
3. Press the RESET key, followed by the Clear button, and confirm that the LOW WATER
LEVEL message is cleared.

4.10 SHUTTING BOILER DOWN FOR EXTENDED PERIOD

If the boiler is to be taken out of service for an extended period of time (one year or more), the
following instructions must be followed.
Shutting Boiler Down For An Extended Period Instructions
1. Set ON/OFF switch on the C-More Controller to the OFF position to shut down the boiler's
operating controls.
2. Disconnect AC power from the unit.
3. Close the water supply and return valves to isolate boiler.
4. Close external gas supply valve.
5. Open relief valve to vent water pressure.
4.11 PLACING THE BOILER BACK IN SERVICE AFTER A
PROLONGED SHUTDOWN
After a prolonged shutdown (one year or more), the following procedures must be followed:
Placing The Boiler Back In Service After A Prolonged Shutdown
Instructions
1. Review installation requirements included in Section 2 of the Benchmark 750 – 3000 Boiler
Installation and Startup Guide Guide, OMM-0127 (GF-205-K).
2. Inspect all piping and connections to the unit.
3. Inspect exhaust vent and air inlet duct work (if applicable).
4. Perform initial startup per Section 4 of the Benchmark 750 – 3000 Boiler Installation and
Startup Guide Guide, OMM-0127 (GF-205-K).
5. Perform scheduled maintenance procedures per Section 4 of this manual and safety
device testing per Section 5 of the Benchmark 750 – 3000 Boiler Installation and Startup
Guide Guide, OMM-0127 (GF-205-K).
OMM-0128_0C
GF-206-K
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
Page 55 of 146
11/29/2017