4 - operation – AERCO Electronic Control Valve User Manual

Page 15

VA-115 INSTRUCTIONS – ELECTRONIC CONTROL VALVE, CXT-E

4-1

4 - OPERATION

This Section provides the basic checks and initial startup for the CXT-E Control Valve and Heater (or
other equipment) being controlled.

OP1. Refer to Figure 2-1 (Steam Flow) or Figure 2-2 (Hot Water Flow). To place the Control Valve and

Heater System into operation, proceed as follows:

a. Ensure that the AERCO Heater (or other equipment) is ready for operation in accordance

with the instructions provided with the Heater.

b. First, slowly open the upstream and the downstream shutoff valves.

c. Ensure that electrical input power is properly connected to the Electronic Control Valve, Type

CXT-E and ECS Control System.

d. Ensure that a 4-to 20 mA control signal is being supplied to pin 3 of the Control Valve

connector.

OP2. If it becomes necessary to take the Control Valve and Heater System out of operation, close the

upstream, downstream shutoff valves.

OP3. If the Control Valve/Heater System is not maintaining the desired setpoint temperature, refer to

Section 7 – TROUBLESHOOTING.