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Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 8 – WATER HEATER MANAGEMENT
Page
124
of
206
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0078_0L
PRI: 11/25/2014
Phone: 800-526-0288
GF-128
WHM Hardware Installation -
Continued
Figure 8-2. Innovation Water Heater Equipped With Sequencing Valve
8.8.2 WHM Modbus Network Wiring
As previously mentioned, all units being controlled by the WHM will be connected to a RS485
Modbus Network. All Modbus networks are wired in a daisy-chain configuration using a
Master/Slave scenario as shown in Figure 8-3.
NOTE
: The WHMS Master does not necessarily have to be on either end of the Daisy-Chain loop
Figure 8-3. Typical Daisy-Chain Modbus/RS485 Network
WHM
MASTER
# 1
WHM
SLAVE
# 2
WHM
SLAVE
# 3
WHM
SLAVE
# 4
WHM
SLAVE
# 8
BALL VALVE
WITH ACTUATOR
2” NPT NIPPLE
2” NPT UNION
HEATER DRAIN
VALVE
COLD WATER INLET