Interlock Tests; Remote Interlock Test; Delayed Interlock Test - Watts AERCO Benchmark BMK5000 Operation And Service Manual

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 5 – SAFETY DEVICE TESTING

5.6 INTERLOCK TESTS

The unit is equipped with three interlock circuits, called the Remote Interlock, and Delayed
Interlock. These circuits are connected to the I/O board's connector strip J6, labeled Remote
Interlock, Delayed Interlock 1 and Delayed Interlock 2 (see Section 2.11.1: I/O Board
Connections in the Benchmark Platinum-Edge: INSTALLATION Manual (GF-210). These
circuits can shut down the unit in the event an interlock is opened. These 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

Remote Interlock Test Instructions
1. Remove the cover from the I/O Box and locate the Remote Interlock terminals on
connector strip J6.
2. On the Controller, go to:
3. Enable the Manual Mode control.
4. Set the valve position between 25% and 30% using the + (Plus) and – (Minus) controls.
5. If there is a jumper across the Remote Interlock 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.
6. The unit should shut down and the Controller should display Interlock Open.
7. Once the interlock connection is reconnected, the Interlock Open message should
automatically clear and the unit should restart.

5.6.2 Delayed Interlock Test

Delayed Interlock 1 and 2 Test Instructions
1. Remove the cover from the I/O Box and locate the Delayed Interlock 1 terminals on
connector strip J6.
2. On the Controller, go to:
3. Enable the Manual Mode control.
4. Set the valve position between 25% and 30% using the + (Plus) and – (Minus) controls.
5. If there is a jumper across the Delayed Interlock 1 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.
6. The unit should shut down and display a Delayed Interlock Open fault message. The
FAULT LED should be flashing.
7. Reconnect the wire or jumper removed in step 5 to restore the interlock.
8. Press the CLEAR button to reset the fault
9. The unit should start.
10. Repeat the above for the Delayed Interlock 2 terminals.
OMM-0137_J •
12/20/2022
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