5
Single-Piece Installation —
For single-piece installa-
tion, perform the following procedure.
1. Turn off all power to equipment.
2. If an existing thermostat is being replaced:
a. Remove existing control from wall.
b. Disconnect wires from existing thermostat, one at
a time.
c. As each wire is disconnected, record wire color
and terminal marking.
d. New or additional wires may be needed to accom-
modate added humidity outputs.
e. Discard or recycle old control.
3. Remove cover from equipment control module by press-
ing the two tabs on the bottom edge and pulling away.
4. Route wires through large hole in equipment control
module base. Level base against wall (for aesthetic pur-
poses only — the equipment control module does not
need be leveled for proper operation) and mark wall
through 2 mounting holes.
5. Drill two
3
/
16
-in. mounting holes in wall where marked.
Control may be mounted on junction box, if desired. Hole
pattern on base matches junction box mounting holes.
6. Secure base to wall with 2 screws and anchors provided.
Additional mounting holes are available for more secure
mounting if needed. Make sure all wires extend through
hole in mounting base.
7. Adjust length and routing of each wire to reach proper
connector block and terminal on mounting base with
1
/
4
-in. extra wire.
8. Connect equipment wiring to the terminals on the equip-
ment control module, being careful not to over-tighten the
screws. See Fig. 9.
9. Push any excess wire into wall and against mounting
base. Seal hole in wall to prevent air leaks. Leaks can af-
fect operation and cause incorrect temperature and/or hu-
midity measurement.
10. Connect red wire of the pigtail to V+ terminal on the
equipment control board. Pigtail is packed loose in the
box from the factory. Pigtail is attached to the back of the
display module via 2-pin, keyed connector. Connect
black wire of the pigtail to Vg terminal on the equipment
control board. Correct polarity must be observed when
connecting. If wires are connected incorrectly, the display
module will not operate.
NOTE: The 2-wire pigtail is not intended to support the weight
of the user interface. Do not hang the user interface from the
equipment control module screw terminals.
11. Attach 2-wire pigtail to display module.
12. Attach display module body to equipment control module
by first setting the module on at top of the equipment con-
trol module and then snapping the bottom corners of dis-
play module into place.
13. Turn on power to equipment. On power up, all display
segments will light for 5 seconds. For the next 5 seconds,
a 2-digit code will appear on the center of the large dis-
play which identifies the equipment configuration:
AC — Two-stage heat / Two-stage cool
HP — Three-stage heat / Two-stage cool
Power —
The thermostat is powered by 24 VAC only. The
thermostat requires the 24 VAC (Rh and/or Rc and C termi-
nals) of the low-voltage transformer to be connected to it for
proper operation. The thermostat will not operate without these
connections. The Rh and Rc terminals are connected via the
PCB breakout jumper. For applications using a single 24-VAC
transformer for power, the breakout jumper should remain in-
tact. For applications using two 24-VAC transformers, the
breakout jumper must be broken because possible voltage dif-
ferences between the two transformers could cause irregular
operation or damage to the thermostat. See Fig. 11.
For applications using two 24 VAC transformers, one in the
indoor unit and one in the outdoor unit, connect the common
wire from each to the C terminal. Connect R from the indoor
unit to the Rh terminal. Connect R from the outdoor unit to the
Rc terminal. Break the jumper on the circuit board. See Fig. 11.
The W and HUM signals are taken from the Rh power and the
G signal is taken from the Rc power.
If the control has been installed in a two-transformer appli-
cation that is later changed to a single-transformer installation,
the installer must install a field-supplied jumper between Rc
and Rh. Depending on the installation, up to 14 wires may be
required. Installation as two-piece unit is recommended. Only
2 wires are required for connection between display module
and equipment control module. These two wires (V+ and Vg)
do not provide ordinary 24 VAC. They carry a combination of
power and communications data that is unique to these
products.
Fig. 11 -
PCB Breakout Jumper
Humidification Equipment and Connections
(33CS2PPRH-01 Model Only) —
The humidification
output connects directly to 24 VAC operated humidifiers. No
other connection or interlock is required. Any of several
installer-selectable operating modes are available.
Dehumidification Equipment and Connec-
tions —
The D1 and D2 terminals are for a dry relay con-
tact. Operating the relay by itself will not cause 24 V to appear
at the terminal. To have 24 V appear at D2, D1 has to have a
wire jumper added to either Rc or Rh.
The dry contact must be configured for dehumidification in
setup Option 19. See Wiring Diagrams for more information.
CONFIGURATION
To Enter and Exit Configuration Mode —
Press
and hold the OCCUPIED button for approximately 10 sec-
onds. The display module will now be in Configuration mode.
The module will automatically exit this mode if no button is
pressed for 3 minutes. Pressing the DONE button will exit
Configuration mode immediately.
Configuration Mode —
The option number is dis-
played in the heat set point location and the configuration set-
ting is displayed in the cool set point location. A box will sur-
round the option number. The MODE button is used to move
the box between the two displayed values or the softkeys be-
low the values may also be used. The value inside the box is
changed by using the UP and DOWN buttons. All changes
made are saved at the time of selection and will be saved in the
WARNING
DO NOT connect unit HUM terminal directly to thermo-
stat control HUM terminal. This will bypass unit safety
controls. Personal injury or death could result.
a33-9172
