Watts Aerco Innovation 800 User Manual page 101

Innovation Hot Water Hot Water Boiler User Manual
TABLE 7-1. HOT WATER BOILER TROUBLESHOOTING – Continued
FAULT INDICATION
RESIDUAL SSOV not fully closed.
1.
FLAME
Defective Flame Detector.
2.
SSOV FAULT DURING
PURGE
SSOV FAULT SSOV switch closed for 15 seconds
DURING RUN during run.
SSOV RELAY SSOV relay failed on IGST board.
1.
FAILURE
Floating Neutral.
2.
Hot and Neutral reversed at SSOV.
3.
SSOV Actuator not allowing for full
1.
closure of gas valve.
SWITCH OPEN
SSOV powered when it should not
2.
be.
Defective switch or Actuator.
3.
Incorrectly wired switch.
4.
OMM-0120_0A
GF-128-I
CHAPTER 7 – TROUBLESHOOTING GUIDE
PROBABLE CAUSES
See SSOV SWITCH OPEN.
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
CORRECTIVE ACTION
Check open/close indicator window of Safety Shut-Off Valve
1.
(SSOV) and ensure that the SSOV is fully closed. If not fully
closed, replace the valve and or actuator.
Close the 1" Gas Shut-Off Valve downstream of SSOV (Figure 7-
1). Install a manometer or gauge at the leak detection port
between the SSOV and Gas Shut Off Valve. If a gas pressure
reading is observed replace the SSOV Valve and/or Actuator.
Replace Flame Detector.
2.
Replace or adjust micro switch in SSOV actuator. If fault persists,
replace actuator.
Press CLEAR button and restart unit. If fault persists, replace
1.
Ignition/Stepper (IGST) Board.
The Neutral and Earth Ground are not connected at the source
2.
and therefore there is a voltage measured between the two. This
measurement should be near zero or no more than a few millivolts.
Check SSOV power wiring.
3.
Observe operation of the Safety Shut-Off Valve (SSOV) through
1.
indicator on the Valve actuator and ensure that the valve is fully
and not partially closing.
If the SSOV never closes, it may be powered continuously. Close
2.
the gas supply and remove power from the unit. Refer fault to
qualified service personnel.
Remove the electrical cover from the SSOV and check switch
3.
continuity. If the switch does not show continuity with the gas valve
closed, either adjust or replace the switch or actuator.
Ensure that the SSOV Proof of Closure switch is correctly wired.
4.
Page 101 of 174
11/15/2016