AERCO Innovation (G-13-1854 and above) - Manual (Page 64)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 5 – MODE OF OPERATION
Page 64 of
196 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
OMM-0078_0J
PRI: 11/22/2013
Phone: 800-526-0288
GF-128
Water Temperature Fault Test – Continued
6. Once the adjustable over-temperature switch setting is approximately at, or just below, the
actual outlet water temperature, the unit should shut down. The FAULT indicator should
start flashing and a HIGH WATER TEMP SWITCH OPEN fault message should be
displayed. It should not be possible to restart the unit.
7. Reset the adjustable over-temperature switch to its original setting. The unit should start
once the adjustable temperature limit switch setting is above the actual outlet water
temperature.
Figure 5-2. Temperature Limit Switch Setting
5.6 INTERLOCK TESTS
The unit is equipped with two interlock circuits called the Remote Interlock and Delayed
Interlock. Terminal connections for these circuits are located in the I/O Box (Figure 2-12) and
are labeled REMOTE INTL’K IN and DELAYED INTL’K IN. These circuits can shut down the
unit in the event that an interlock is opened. These interlocks are shipped from the factory
jumpered (closed). However, each of these interlocks may be utilized in the field as a remote
stop and start, an emergency cut-off, or to prove that a device such as a pump, gas booster, or
louver is operational.
5.6.1 Remote Interlock
Remote Interlock
1. Remove the cover from the I/O Box and locate the REMOTE INTL’K IN terminals (see
Figure 2-12).
2. Start the unit in the Manual Mode and set the valve position between 25% and 30%.
3. If there is a jumper across the REMOTE INTL’K IN terminals, remove one side of the
jumper. If the interlock is being controlled by an external device, either open the interlock
via the external device or disconnect one of the wires leading to the external device.
4. The unit should shut down and display INTERLOCK OPEN.
5. Once the interlock connection is reconnected, the INTERLOCK OPEN message should
automatically clear and the unit should restart.
RESET
BUTTON
ADJUSTABLE
TEMERATURE LIMIT
SWITCH