New style relay replaces the original obsolete White Rodgers relay. This relay does not look like your original relay but it will work perfect. You will need different mounting holes. Easy way to mount is to use some shorter self-tapping metal screws (not included). Move your wires as outlined next.
Move the wire from terminal 1 on your old relay to one of the unmarked double terminals on the new relay. This is a 24V wire.
Move the wire from terminal 3 on your old relay to the other unmarked double terminal on the new relay. This is the other 24V wire. It does not matter which double terminal the 24V wire uses as long as one wire is on the left side and the other on the right side leaving one of the double terminals exposed on each side.
Move the wire from terminal 2 of your old relay to terminal 1 of the new relay.
Move the wire from terminal 4 of your old relay to terminal 3 of the new relay. That's it!
Terminals 1 & 3 are normally open. When 24 volts is applied to the unmarked 24V terminals, it closes terminals 1 & 3 to complete the circuit. When power is cut, terminals 1 & 3 open back up.
Used on the following units: PGB090210-3 thru PGB180280-4. Also known as part number 134-20102-106, B13707-51, B1370728, BT13707-1, BT13707-2, 130M00025, BT13707-01, BT13707-02, BT1370701, BT1370701, L39-274 & 0130M00025.