Troubleshooting; Sequencing Valve Description & Operation; Sequencing Valve Description - Watts Aerco Innovation 800 User Manual

Innovation Hot Water Hot Water Boiler User Manual

8.10 TROUBLESHOOTING

Faults which may occur during WHM operation include the items listed in Table 8-3.
FAULT INDICATION
OUTLET
TEMPERATURE
display is flashing on 2
C- More Control Panels
REMOTE LED on one
or more WHM units is
Off.
Actuator-controlled
sequencing valve does
not open
8.11 SEQUENCING VALVE DESCRIPTION & OPERATION
Brief descriptions of Actuator-Controlled Sequencing Valve (P/N 92123) and its operating
characteristics are provided in sections 9.11.1 and 9.11.2, respectively. The installation of the
valve itself is described in Chapter 2, section 2.5.1.

8.11.1 Sequencing Valve Description

The Actuator-Controlled Sequencing Valve shown in Figure 8-5 is comprised of the following
main components:
•
2" Brass Ball Valve
•
Actuator Linkage
•
Actuator Housing
•
Valve Shaft Handle
OMM-0120_0A
GF-128-I
CHAPTER 8 – WATER HEATER MANAGEMENT
Table 8-3. WHM Troubleshooting
PROBABLE CAUSE
Two C-Mores have their
1.
WHM Mode menu option
set to WHM Master
Improperly connected or
1.
faulty RS485 Modbus
wiring.
Improper Comm address.
2.
Unit Comm address is
3.
not unique.
Control cable not
1.
connected to valve
actuator.
24 VAC power not being
2.
supplied to valve
actuator.
Defective valve actuator.
3.
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
CORRECTIVE ACTION
Check the WHM Mode entries in
1.
the units which have their displays
flashing. Change one of the WHM
Mode settings to WHM Slave.
Check the polarity of the RS485
1.
Comm connections on the I/O
board of the affected unit. Also,
ensure that all Modbus wiring
connections to the unit are secure.
Verify that the address of the
2.
affected unit is within the allowable
range (1 thru 8).
Check to ensure that none of the
3.
units have the same Comm
address.
Ensure that the control cable from
1.
the unit's I/O Box is connected to
the valve actuator.
Remove the enclosure cover from
2.
the valve actuator and verify that 24
VAC is present at Terminal 2 of the
actuator.
Replace valve actuator. Following
3.
replacement, the actuator stroke
will have to be calibrated to ensure
it fully opening and closing.
Page 123 of 174
11/15/2016