AERCO Boiler Valve Controller (BVC) PRIOR to Serial-12-840-1 - Manual (Page 7)

GENERAL INFORMATION
7
SECTION 1
0B
GENERAL INFORMATION
1.1
4B
INTRODUCTION
This User’s Manual provides the installation and operation procedures for the AERCO Boiler
Valve Controllers (BVCs). Currently, the Boiler Valve Controllers are available in two (2) Models
identified as part nos. 64064 and 64065. BVC part no. 64064 can control up to four (4) motor
operated isolation valves and BVC part no. 64065 can control up to twelve (12) motor operated
isolation valves. These Boiler Valve Controllers permit AERCO Benchmark and KC1000 Boilers
to be used in variable flow systems, while eliminating the need for a dedicated bypass line.
1.2 MOTOR OPERATED VALVE REQUIREMENTS
The Motor Operated Valves (MOVs) must satisfy two basic requirements.
1. Power Close – Spring Return Open
•
In the event that the BVC fails, the MOVs need to open to prevent over-temperature
conditions.
2. Must have “Proof of Open” Switch
•
Switch “makes” when valve opens
• Switch breaks when valve closes
The former lets the boiler know that water is flowing through the boiler, allowing it to safely fire.
1.3 BOILER VALVE CONTROLLER GENERAL DESCRIPTIONS
The two Boiler Valve Controller Models are housed in NEMA Type 4X (for indoor use only)
laminated fiberglass enclosures. An illustration of the BVC box showing the front plate with the
touch screen is shown in Figure 1 below.