55
24 VAC THERMOSTAT
(TSTAT) INPUTS (J4 & J6)
24 VAC THERMOSTAT (TSTAT)
INPUTS (J4 & J6)
These connections are used with any
traditional 24VAC one-stage or two-
stage thermostat or the modulating,
non-communicating, thermostat speci-
fied for this modulating furnace. Fully
communicating thermostats must be
connected to the COMM NETWORK
CONNECTION (see section titled
COMMUNICATING SYSTEMS
of this
document for details). Optimum heat-
ing performance will be realized only
with the fully modulating thermostat
(either communicating or non-commu-
nicating).
W
1, Y1, Y2, G, C and R
are the tradi-
tional thermostat inputs used in nearly
all HVAC equipment. Installation of the
thermostat to these connections is
straight-forward and simple.
H
UM STAT
– This terminal is used to
connect the output of a humidistat to
the furnace control to control humidifi-
cation and/or dehumidification.
Optional equipment is required for
these features. Please see the
section titled
HUMIDIFICTION AND
DEHUMIDIFICATION
of this docu-
ment for more details.
V
/W2
– This terminal is used to con-
nect the modulating signal (V) from
a non-communicating, fully modulat-
ing thermostat specified for use with
this furnace. It is used to transmit
the firing rate (determined by the
thermostat) to the furnace control.
In addition, a traditional 24VAC sig-
nal from a two-stage thermostat ter-
INTEGRATED FURNACE CONTROL (I.F.C.)
FIGURE 58
MODULATING CLIMATE-TALK COMMUNICATING FURNACE CONTROL (RHEEM # 62-102783-01)
BIAS/TERM
(COMM ONLY)
(all must be on)
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