Reznor JT4BD Option - Installation - Indoor Fan Delay - Manual (Page 2)

2
1. Remove green wire from blower relay and
discard. Connect new green wire to the fan
delay relay terminal #4 (terminal #5 on some
models) and route to “G” at thermostat.
2. Attach new blue wire between terminal #1
on fan delay relay and terminal where the
green wire has been removed from blower
relay in the previous step.
3. Locate black wire connecting blower relay
coil common terminal and transformer.
Remove wire at transformer.
4. Attach new gray wire to the time delay relay
terminal #3 and the transformer terminal
Figure 1. Wiring Diagram for Single Package Air Conditioners and
Heat Pump Applications.
where black wire was removed in step 3
(piggy back terminal). Re-connect the black
wire removed in step 3 to the piggy back
terminal at transformer.
5. Locate the red wire connecting to the fuse at
the transformer. Cut the wire at a convenient
location and strip both ends at the cut. Strip
the new red wire at the piggy back terminal.
Twist all three wire ends together and secure
with a wire nut. Connect the straight terminal
of the red wire to terminal #2 on the fan delay
relay.
6. Complete installation as outlined in “General”
instructions on page 1
* Wires marked with an asterisk (*) are supplied as part of the TDR kit.
† labeled as teminal #5 on some models
1
3
T2 L2
TRANSFORMER
BLOWER
RELAY
UNIT
CONTACTOR
TIME DELAY RELAY
TO BLOWER MOTOR
24V
2 4†
RED
BLACK
BLACK
RED *
GRAY *
GREEN *
BLUE *
TO "G" ON
T'STAT
TO "R"
TERMINAL
SPLICE/
SECURE
RED
FUSE