AERCO Belimo Motorized Valves Installation - Manual (Page 18)

PR2: 08/02/12 Page 18 of 20 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Installing Belimo Motorized Valves on AERCO Benchmark Boilers
Technical instruction Document
TID-0028_0C
6. Sequencing of Motorized Valve Through Building Automation System
6.1 Prerequisites for Automation
1. Motor Operated Valve (MOV) for each boiler must have a proof of open switch.
2. Check with valve manufacturer for the time it requires for the valve to fully open. Opening time
must not exceed 110 seconds.
6.2 Wiring/Programming for Automation
1. Use the Aux Relay of the C-More control system to signal the Building Automation System (BAS)
that a boiler is in demand.
2. Wire the proof of open switch of the MOV to the Delayed Interlock of the C-More control system.
mA OUT
RS-485
COMM.
+
-
+
-
ANALOG IN
SENSOR COMMON
OUTDOOR SENSOR IN
REMOTE INTL'K IN
B.M.S. (PWM) IN
SHIELD
+
-
+
-
(AIR) AUX SENSOR IN
NOT USED
EXHAUST SWITCH IN
DELAYED INTL'K IN
FAULT RELAY
120 VAC, 5A, RES
AUX RELAY
120 VAC, 5A, RES
G
RELAY CONTACTS:
120 VAC, 30 VDC
5 AMPS RESISTIVE
DANGER
120 VAC USED
IN THIS BOX
NOT USED NOT USED
NC
COM
NO
NC
COM
NO
NOT USED
0 – 10V
AGND
Figure 4: C-More PCB Showing Delayed and Remote Interlock Connections
3. Program the Aux Start On Delay on the C-More to allow enough time for the valve to fully open
before firing the boiler. The Aux Start On Delay is located in the Configuration Menu of the C-
More control system. Range is 0 to 120 seconds.
4. The BAS must incorporate a delay when closing valves once the demand is satisfied. This will
allow the boiler to dissipate excess heat. Recommended delay is 2 minutes minimum. More time
may be required dependent on the system design.
5. The BAS must be programmed so when there is no demand from the entire system (all boilers
are off), all boiler MOVs are opened.
Delayed Interlock Connections
Auxiliary Relay Connections