Issue:
Are there alarm outputs on RAUJ units?
Resolution:
Yes, however the contacts are not shown on the schematic and the contacts are not factory wired. Instructions follow.
Notes:
20-30 ton unit instructions:
Locate 1K11 reset relay in the main control box. There is one set of unused contacts that can be utilized as alarm contacts. 4 is Common, 5 is NC, 6 is NO. The contacts are shown in the "normal state" (no alarm).
40-60 ton unit instructions:
Locate 1K11 reset relay in the main control box. This is the circuit one reset relay. There is one set of unused contacts that can be utilized as alarm contacts for circuit 1. 4 is Common, 5 is NC, 6 is NO. The contacts are shown in the "normal state" (no alarm).
Locate 1K12 reset relay in the main control box. This is the circuit two reset relay. There is one set of unused contacts that can be utilized as alarm contacts for circuit 2. 4 is Common, 5 is NC, 6 is NO. 4 is Common, 5 is NC, 6 is NO. The contacts are shown in the "normal state" (no alarm).
80-120 ton units:
Purchase 2) RLY00636 relays, one for each circuit and wire in as shown below.
Locate 1K21 reset relay in the main control box. This is the circuit one reset relay. There are no unused contacts, therefore an isolation relay must be used as shown.
Remove wire terminal labeled 36AX from 1K21-6 and connect to isolation relay #1 terminal 6.
Remove wire terminal labeled 56E from 1K21-4 and connect to isolation relay #1 terminal 4.
Provide field wiring to the isolation relay coil #1 as shown.
The contacts are shown in the "normal state" (no alarm).
Locate 1K22 reset relay in the main control box. This is the circuit two reset relay. There are no unused contacts, therefore an isolation relay must be used as shown.
Remove wire terminal labeled 36AY from 1K22-6 and connect to isolation relay #2 terminal 6.
Remove wire terminal labeled 55E from 1K22-4 and connect to isolation relay #2 terminal 4.
Provide field wiring to the isolation relay #2 coil as shown.
The contacts are shown in the "normal state" (no alarm).
Sequence of operation:
When a circuit trips off due to high pressure, low pressure, winding thermostat, or circuit breaker trip, the Reset Relay will energize and latch in. Power to the Reset Relay must be cycled in order to reset the circuit.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.