Section 3: Start Sequence; Introduction; Start Sequence - Watts Aerco Benchmark Series Operation And Service Manual

Benchmark Platinum-Edge: Operation-Service Manual
SECTION 3 - START SEQUENCE

SECTION 3: START SEQUENCE

3.1 INTRODUCTION

The information in this section provides a guide to starting the Benchmark Boiler using the Edge
Controller. It is imperative that the initial startup of this unit be performed by factory trained
personnel. Operation prior to initial startup by factory trained personnel may void the equipment
warranty. In addition, the following WARNINGS and CAUTIONS must be observed at all times.
WARNING!
•
All of the installation procedures in Section 2: Installation of the Benchmark Platinum-
Edge: INSTALLATION Manual (GF-210) must be completed before the initial start-up of
the unit.
•
Electrical voltages up to 120 VAC (BMK 750 – 2000) and 208 or 460 VAC (BMK
2500/3000) or 208, 460 or 575 VAC (BMK 5000 & 6000) and 24 volts AC may be used
in this equipment. It must be serviced only by factory certified service technicians.
•
Do not attempt to dry fire the unit. Starting the unit without a full water level can
seriously damage the unit and may result in injury to personnel or property damage. This
situation will void any warranty.
•
Initial startup of the unit must be be performed by AERCO factory trained personnel.
Operation prior to initial startup by factory trained personnel may void the equipment
warranty. In addition, the following WARNINGS and CAUTIONS must be observed at all
times.

3.2 START SEQUENCE

When the Edge Controller Enable/Disable switch is set to the Enable position, it checks all pre-
purge safety switches to ensure they are closed. These switches include:
•
High Water Temperature switch
•
High Gas Pressure switch
•
Low Gas Pressure switch
•
Low Water Level switch
•
Safety Shut-Off Valve (SSOV) Proof of Closure (POC) switch
NOTE:
The Blocked Inlet and downstream Blower Proof switches are not checked prior to starting
the pre-purge.
If all of the above switches are closed, the READY light (above the Enable/Disable switch) will
light when the switch is in the Enable position and the unit will be in the STANDBY mode.
NOTE:
If any of the Pre-Purge safety device switches are open, or the required conditions are not
observed throughout the start sequence, appropriate fault messages will be displayed.
When there is a demand for heat, the following events occur:
OMM-0137_D • GF-211 • 7/16/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 15 of 146