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DESCRIPTION
The Zonex Systems
RMOD
is a microprocessor based digital communi-
cating HVAC Relay Module for the
ZonexCommander (Plus)
system. The
RMOD
controls Gas/Electric 2-stage heat and cool, as well as Heat Pump,
2-stage cool and 3-stage heat, based on supply air temperature. The
RMOD
provides high and low limits to protect HVAC system components.
Each
RMOD
can communicate with up to 20 thermostats. There can
be up to 4
RMOD
controllers per Command Center; however, each
Command Center controls up to 20 thermostats. The total number of
thermostats cannot exceed 20 on each Command Center.
The
RMOD
and corresponding
ModStats
must be configured into the
ZonexCommander (Plus)
system before the
RMODs
will communicate.
See Installation Guide.
INSTALLATION
RMOD circuit board
The
RMOD
can be installed with the Command Center or in the HVAC unit
it is controlling. It must be protected from the elements in an area
where the temperature range is from 25° to 125° non-condensing. DO
NOT install the Command Centers or
RMODs
in close proximity to large
transformers, VFDs, or any device that produces electrical energy fields.
1. Install the
RMOD
where it can be properly accessed.
3. The
RMOD
is shipped from the factory to operate in the Gas Electric
mode. For Heat Pump operation, place the HP jumper tab over
both pins.
4. For Heat Pump “O” reversing valve operation the O/B jumper tab is
on one pin. For reversing valve “B” operation, place the jumper tab
over both pins.
intermittent fan. For Constant FAN in the Occupied mode, place the
jumper tab over the middle and upper pins (ON).
of the bypass
take-off.
bypass take-off (Gas Electric), or between the indoor coil and strip
heat elements (Heat Pump AHU).
Addressing & Calibration
button until the correct address appears, and release.
2. Energize the FAN only and check
RMOD
display calibration.
adjust calibration.
4. Return air temperature is displayed when the UP and DN buttons are
holding down these buttons.
Wiring
8740).
any other ac voltage wiring; it must be run completely separate. Use
switch to the EM terminals on the
RMOD
.
The
RMOD
is ready to be configured in the
ZonexCommander (Plus)
program.
See Installation Guide.
RMOD UNIT DESCRIPTION / INSTALLATION
HVAC UNIT CONTROLLER
Sensors – Supply and Return (LAT)
2. Install the LV AIR sensor (
LAT
) in the supply duct ahead of the
1. Install the RA sensor (
LAT
) in the return duct, ahead
RMOD
to ON from S1, and press the
ADR
button. To change the
address from 92, continue to hold the
ADR
button; and press the UP
1. Set the address for the
RMOD
(92, 93, 94 or 95) by switching the
5. Set the FAN jumper tab (JPR1) on the center and lower pin (AUTO) for
2.
The
RMOD
is powered by the Command Center transformer
by daisy chaining the 24vac from Command Center to the
RMOD
.
You will need to properly size the transformer to the total number
of dampers on the system.
with 18 AWG thermostat wire.
3. When the sensor leads are too short, you may extend the wire
3. Constant display indicates supply air temperature. Rotate R52 to
pressed simultaneously. Rotate R45 to adjust the calibration, while
4. Connect the
RMOD
outputs to the HVAC system.
5. If Emergency Heat is to be controlled by a remote switch, wire a SPST
3. Connect the Supply Air sensor to the LV Air terminal screw block.
2. Connect the Return Air sensor to the RA terminal screw block.
NOTE: The twisted pair communication wire cannot be installed with
1. Connect the twisted pair communication wires to RX and TX (Belden
shielded twisted pair (Belden 8450) if there is any potential
for electrical interference.
