EXTERNAL SIDE FILTER RACK:
RXGF-CA
These parts are available through
ProStock parts department.
ALTERNATE (LEFT-SIDE) DRAIN
KIT (DOWNFLOW MODELS ONLY):
RXGY-H01
TYPICAL WIRING
ACCESSORIES FOR
COMMUNICATING
RESIDENTIAL SYSTEMS
The Rheem Serial Communicating
(CC2) system allows accessories to
be connected to shut down the sys-
tem in the event of a fault. Typical
devices that can be connected are
the drain overflow
switch, s
moke
detector and freeze protection
switch. There are two methods of
connecting the switch to the system
depending on the device configura-
tion normally closed or normally
open. The blower can run during a
fault or the blower can shut off dur-
ing a fault depending on how the
system is connected. Please refer to
local and/or state codes for installing
these devices. The following opera-
tion applies
on
ly when BOTH the
condenser and thermostat are serial
communicating devices. If the con-
denser is non-communicating (tradi-
tional, legacy 24VAC controlled) this
diagram is not valid.
B2. WITH NON-COMMUNICATING
THERMOSTAT (REQUIRES
OPTIONAL HUMIDISTAT).
Control of dehumidification only
(no humidification) can be
accomplished by installing an
optional humidistat as shown in
Figure 34. The dipswitch S5-1
must b
e s
et to the “ON” posi-
tion. If this switch is not turned
“ON”, dehumidification opera-
tion will not take place. Further,
if this switch is “ON” and no
humidistat is installed, airflow in
cooling will be permanently
reduced by approximately 15%.
C. HUMIDIFICATION AND DEHUMIFI-
CATION CONTROL
(REQUIRES OPTIONAL HUMIDIFI-
ER).
C1. WITH COMMUNICATING
THERMOSTAT
Humidifier control is included
with the (-)HC-TST412
MDMS
(
modulating, non-communicat-
ing) and (-)HC-TST550CMMS
(full-color communicating)
model thermostats. However, it
is not included with the (-)HC-
TST501CMMS model commu-
nicating thermostat. Do not pur-
chase the latter thermostat if
humidification control is
required. To wire the furnace for
humidification and dehumidifi-
cation control using the former
thermostats, refer to the wiring
diagram in Figure 31
. B
e sure
not
to install the jumper
between “R” and “HUM STAT”
on the furnace control.
Installing this jumper will oper-
ate the humidifier any time
there is a heat call and dehu-
midification will never take
place when in cooling. Without
the jumper, a humidification call
from the thermostat must be
active and a heat call must be
present with the blower running
for the “HUM OUT” relay con-
tacts to close.
C2. WITH NON-COMMUNICATING
T
HERMOSTAT (REQUIRES
OPTIONAL HUMIDISTAT.)
For non-communicating ther-
mostats, an optional humidistat
must be installed. Controlled
humidification and dehumidifi-
cation can be accomplished
using a humidistat as shown in
Figures 32 or 33. These figures
show installation of a humidifier
with external and internal power
supplies respectively.
Dehumidification operation will
be disabled if the dipswitch
S5-
1
is in the “OFF” position. If this
switch is in the “ON” position,
dehumidification control will be
active.
OTHER ACCESSORIES
AVAILABLE
These kits are available through the fin-
ished goods department.
CONCENTRIC VENT TERMINATION KIT
= RXGY-E03A
HORIZONTAL, TWO-PIPE TERMINA-
TION KIT = RXGY-D02/D02A, RXGY-
D03/D03A, OR RXGY-D04/D04A
VENT TERMINATION KIT: RXGY-G02
CONDENSATE PUMP KIT: RXGY-B01
NEUTRALIZER KIT: RX
GY-A01
EXTERNAL BOTTOM FILTER RACK:
RXGF-CB
THERMOSTAT AND ACCESSORIES FOR THERMOSTAT
Programmable Modulating Thermostat:
(-)HC-TST412MDMS
R
emote
S
ensor:
(For HC-TST412MDMS T-Stat Only)
F1451378
Programmable Communicating Modulating:
(-)HC-TST501CMMS
Full-Color, Programmable Communicating Modulating:
(-)HC-TST550CMMS
Thermostat Wall Plate For Thermostats Above Only:
F61-2600
39
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