Special Configuration-Communicating Thermostat W/Non-Comm. Condenser; Vac From Transformer Connections; Fuse; 115 Vac Terminals - Rheem RGPE series Installation Instructions Manual

SPECIAL CONFIGURATION –
COMMUNICATING THERMOSTAT
AND FURNACE WITH A NON-
COMMUNICATING CONDENSER
Y Y 1 1 a a n n d d Y Y 2 2 – These terminals may be
used to connect directly to a non-com-
municating condenser when a commu-
nicating thermostat is installed to the
furnace but a non-communicating con-
denser is installed in the system. While
the optimum configuration is with a
communicating condenser connected
to the network, there may be installa-
tions where this is not desired. In
these cases, the thermostat will be
communicating with the furnace control
and the furnace control will energize
the condenser as necessary (the addi-
tional relays have been added to the
furnace control to allow this operation).
The thermostat connections labeled
"Y1" and "Y2" on the I.F.C. are normally
i i n n p p u u t t s s to the furnace control to turn on
the blower when they are energized.
However, in this configuration, these
(normally) inputs become o o u u t t p p u u t t s s to
energize the condenser when a cooling
call has been sent from the communi-
cating thermostat.
FIGURE 27
WIRING DIAGRAM – SPECIAL CONFIGURATION: COMMUNICATING THERMOSTAT AND FURNACE WITH NON-COMMUNICATING CONDENSER
34
When this configuration is desired, use
the wiring diagram in Figure 27 to con-
nect the thermostat and condenser to
the furnace control. For single stage
condensers, a jumper must be installed
between Y1 & Y2 at the furnace con-
trol.
NOTE: A heat pump condenser cannot
be installed with this configuration.
There is no control for the reversing
valve.
24 VAC FROM TRANSFORMER
(XFORMER) CONNECTIONS
These inputs are used to connect
24VAC from the furnace transformer to
the furnace control (I.F.C.).
FUSE (F1)
A three-amp automotive-style (ATC
blade type) fuse is supplied on-board
the furnace control. This fuse should
provide protection from short-circuits on
the control board and associated 24
VAC wiring.

115 VAC TERMINALS

These terminals supply 115 VAC to
the furnace control from the input at
the junction box of the furnace.
Additionally, spare terminals are pro-
vided for use with electronic air
cleaners and other accessories as
needed (Check the voltage rating of
your equipment.)
INDUCED DRAFT MOTOR
(INDUCER) OUTPUT (J2)
This four-pin Mate-n-Lok style con-
nector is black in color and provides
power to both the high and low
speed inducer outputs. This con-
nector on the IFC has female sock-
ets so that it can not be confused
with the four-pin connector used for
motor control (which has male pins).
For troubleshooting purposes, follow
the wiring diagram and troubleshoot-
ing flowchart supplied in this manual
and on the inside of the furnace
blower door. Additionally, the pin
designations for the connector are
specified below: