AERCO XPC GATEWAY Communications - Manual (Page 68)

GATEWAY COMMUNICATIONS MANUAL
68
SECTION 5 XPC GATEWAY TO
ECS CONTROLLED HOT WATER HEATERS
5.1 CONNECTION AND SET-UP OF ELECTRONIC CONTROL SYSTEM (ECS)
The AERCO Electronic Control System (ECS) used to control indirect fired water heaters can be
connected to an RS485 Modbus network, when equipped with an optional Communications Board
(AERCO part no. 64009). RS485 Modbus connections to the ECS are made on the rear of the
Temperature Controller (Eurotherm 2408) contained in the Control Box. Proceed as follows to access the
Temperature Controller wiring connections:
1. Disconnect power from the ECS Control Box.
2. Loosen the captive screw on the right-front portion of the Control Box (Figure 5-1) to open the hinged
panel door.
WATER HEATER
TEMP CONTROLLER
B-PLUS TM
HOLD
RUN AUTO
MAN
2408
PT.NO.
PT.NO.
OVER TEMP SWITCH
PANEL
DOOR
CAPTIVE
SCREW
Figure 5-1. ECS Control Panel Front View
3. Next, open the door and loosen the captive screw at the top of the recessed panel (Figure 5-2).
Swing down the recessed panel to access the rear wiring connections on the Temperature Controller
(Figure 5-3).