Interlock Tests; Remote Interlock Test; Delayed Interlock Test; Flame Fault Test - Watts AERCO Edge CFR 3000 Operator's And Service Manual

SECTION 5 SAFETY DEVICE TESTING
7. Repeat Step 2 to return the Automatic Reset switch but press the Up arrow to original setting.
8. The unit should start once the setting is above the actual outlet water temperature.
9. Repeat steps 1 – 4 on the Manual Reset switch. However, unlike the Automatic Reset switch, the
unit will not restart automatically when the original temperature is restored. You must press the RST
(Reset) button to restart the unit.

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 and are labeled REMOTE INTL'K IN and
DELAYED INTL'K IN.
These circuits can shut down the unit in the event an interlock is opened. Both interlocks are shipped
from the factory jumpered (closed). However, they 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 Test

1. Remove the cover from the I/O Box and locate the REMOTE INTL'K IN terminals.
Main Menu → Diagnostics → Manual
2. Go to:
3. Set the valve position between 25% and 30% using the + (Plus) and – (Minus) controls.
4. 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.
5. The unit should shut down and the Controller should display Interlock Open.
6. Once the interlock connection is reconnected, the Interlock Open message should automatically
clear and the unit should restart.

5.6.2 Delayed Interlock Test

1. Remove the cover from the I/O Box and locate the DELAYED INTL'K IN terminals.
Main Menu → Diagnostics → Manual Mode
2. Go to:
3. Set the valve position between 25% and 30% using the + (Plus) and – (Minus) controls.
4. If there is a jumper across the DELAYED INTL'K IN terminals, remove one side of the jumper. If the
interlock is connected to a proving switch of an external device, disconnect one of the wires leading
to the proving switch.
5. The unit should shut down and display a Delayed Interlock Open fault message. The FAULT LED
should be flashing.
6. Reconnect the wire or jumper removed in step 5 to restore the interlock.
7. Press the CLEAR button to reset the fault. The unit should start.

5.7 Flame Fault Test

Flame faults can occur during ignition or while the unit is already running. To simulate each of these
fault conditions, proceed as follows:
1. Set the Controller's Enable/Disable switch to Disable.
•
Mode, then enable Manual Run.
and enable Manual Run.
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