Changeover Sensor; Configure Advanced Setup - Carrier 33CS Installation And Operating Instructions Manual

Fig. 7 — Typical Wiring Diagram — 2-Pipe, Low Voltage Valve, Chilled Water with Electric Strip Heat
Table 1 — Thermostat Wiring Terminations
(4-Pipe Systems)
EXISTING WIRE
FUNCTION
DESIGNATION
Y1, Y, or C
W1, W, or H
Rh, R, M, Vr, or A
C
G, F, or LOW Low Fan Speed
MED Medium Fan Speed
HIGH High Fan Speed
Table 2 — Thermostat Wiring Terminations
(2-Pipe Systems)
EXISTING WIRE
FUNCTION
DESIGNATION
Y1, Y, or C Water Valve
W1, W, or H Strip Heater
Rh, R, M, Vr, or A
C
G, F, or LOW Low Fan Speed
MED Medium Fan Speed
HIGH High Fan Speed
Changeover Sensor —
with a two-pipe heating/cooling system, a changeover sensor
(33CSWCO-FC) may be used to provide automatic heat/cool
mode changeover.
Configure Advanced Setup —
setup screens of the thermostat, press the Mode and Fan buttons
simultaneously for 10 seconds. The display will change. The
Advanced Setup Step number is shown in the top right corner of
the thermostat screen. Use the Mode button to advance through
the steps. Use the UP and DOWN ARROW buttons to change
the settings. There are 13 Advanced Setup Steps. See Table 3.
Press the Mode and Fan buttons at the same time to exit the Ad-
vanced Setup mode.
R
G
Y1
G3
W1
G2
C
THERMOSTAT
TERMINAL
CONNECTION
Cooling Y1
Heating W1
Power R
Common C
G
G2
G3
TERMINAL
CONNECTION
Y1
W1
Power R
Common C
G
G2
G3
If the thermostat is being used
To enter the advanced
R
24vac
R V V
C
24 Volt Cold
Water Valve
24 Volt Relay
to Control Strip Heater
G
G
G2(W)
G2/(W)
G3(Y) G3/(Y)
COM
COM
LO
33ZCRLYBRD
DISPLAY CONFIGURATION (Step 1) — The Display con-
figuration is used to select what the thermostat will display
when it is not being used. If the configuration is set to ON, the
thermostat will display mode, fan operation, set points, and
room temperature. If the configuration is set to OFF, the ther-
mostat will be blank. If any button is pressed, the thermostat
screen will return to full display. The default is ON.
SINGLE OR DUAL SET POINT CONFIGURATION (Step
2) — Step 2 is used to configure the thermostat for single or
dual set point operation. The configuration can be set to 1 or 2.
The default is 2. When the configuration is set to 1, there is
only one set point used for both heating and cooling. When
the configuration is set to 2, there are two set points (one for
heating, one for cooling).
TWO OR FOUR PIPE SYSTEM CONFIGURATION
(Step 3) — Step 3 is used to configure the thermostat for use in
a 2-pipe or 4-pipe system. When the configuration is set to 2,
the thermostat will be configured for use with a 2-pipe system.
Advanced Setup Step 4 must be configured correctly if Step 3
is set to 2. When the configuration is set to 4, the thermostat
will be configured for use with a 4-pipe system. The default
is 4.
NOTE: Advanced Setup Step 4 will only be shown if Step 3 is
set to 2.
TWO-PIPE SYSTEM OPERATION (Step 4) — Step 4 is
used to configure the thermostat for use in a 2-pipe system.
The configuration can be set to 1, 2, 3, 4, or 5. The default is 3.
When the Two-Pipe Operation configuration is set to 1, the
two-pipe system will function as a Heat-Only system. When
the Two-Pipe Operation configuration is set to 2, the two-pipe
system will function as a Cool-Only system. When the Two-
Pipe Operation configuration is set to 3, the two-pipe system
will function as a Heat/Cool Auto-Changeover system. When
the Two-Pipe Operation configuration is set to 4, the two-pipe
system will function as a Heat/Cool system with auxiliary elec-
tric heat (lockout electric heat when hot water is available).
When the Two-Pipe Operation configuration is set to 5, the
two-pipe system will function as a Heat/Cool system with total
electric heat (no hot water heat).
5
FAN
(VALVE)
(COOL)
HI
(HEAT)
MED