AERCO Boiler Valve Controller (BVC) PRIOR to Serial-12-840-1 - Manual (Page 18)

INSTALLATION
18
NOTE
The I/O Terminal Strips for the KC and Benchmark Boiler series are identical.
2.4.3
22B
Connecting the Required Electrical Components (4 Boiler Version)
1. Refer to Figure 6 illustrating the Boiler I/O Box and locate the Auxiliary (AUX) Relay
terminals on the lower right terminal strip.
2. Connect the NO (Normally Opened) and COM (Common) terminals of the AUX Relay (on
the Boiler I/O Box) to the appropriate terminals of the Boiler Valve Controller as shown in
Figure 6 and Figure 8. Tables summarizing the connection terminals on the BVC follow.
Table 1 - BVC Connection Terminals from Boiler I/O Box AUX Relay (4 Boiler Sys)
4 Boiler System
Terminal Block
Connections
Boiler I/O Box
NO Terminal
Boiler I/O Box
COM Terminal
Boiler #1 Relay 1 5
Boiler #2 Relay 2 6
Boiler #3 Relay 3 7
Boiler #4 Relay 4 8
3.
Next, refer to Figure 8 and connect the CLOSE/COMMON terminals in each MOV to the
appropriate terminals in the BVC. A table summarizing the connection terminals on the BVC
follows:
Table 2 - Connection Terminals on the BVC from MOV (4 Boiler Sys)
4 Boiler System BVC
Terminal Connections
MOV
CLOSE
Terminal
MOV
COMMON
Terminal
MOV #1 (V-1) 9 17
MOV #2 (V-2) 10 18
MOV #3 (V-3) 11 19
MOV #4 (V-4) 12 20
4. Finally, refer to Figure 8 and connect the Delayed Interlock terminals (DELAYED INTL’K IN)
in the Boiler I/O Box (Figure 6) to the Open End Switch terminals on the corresponding
MOV.