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Table 1 — Aquazone™ Thermostats
Field-Supplied Hardware For CCN Applica-
tions —
The factory-installed PremierLink™ controller for
the water source heat pump unit is configurable with a variety
of Carrier space temperature sensors.
SPACE TEMPERATURE SENSOR (SPT) — A field-supplied
Carrier space temperature sensor is required to maintain space
temperature in sensor mode. There are three sensors available
for this application: the 33ZCT55SPT Space Temperature
Sensor with Override Button, the 33ZCT56SPT Space
Temperature Sensor with Override Button and Set Point
Adjustment, and the 33ZCT58SPT T58 Communicating Room
Sensor with Override Button, Set Point Adjustment, and
Manual fan control.
INDOOR AIR QUALITY CO
2
SENSOR — An indoor air
quality sensor is required for CO
2
level monitoring. Three
different CO
2
sensors are available for this application: the
33ZCSENCO2 sensor is an indoor, wall-mounted sensor with
an LED display, the 33ZCT55CO2 sensor is an indoor,
wall-mounted sensor without display (also includes a space
temperature sensor with override button), the 33ZCT56CO2
sensor is an indoor, wall-mounted sensor without display (also
includes a space temperature sensor with override button and
temperature offset).
ORDERING
NUMBER
THERMOSTAT TYPE FUNCTIONS
50QE900-220WS
Aquazone 7-Day Programmable 2 stages heating, 2 stages cooling, auto changeover
Fahrenheit and Celsius temperature scales
4 settings per day
24 vac
Backlit LCD
Keypad
5-minute compressor protection
NEVERLOST™ memory
3 security levels
50QE900-220LA
Aquazone Light Activated, 7-Day Programmable
2 stages heating, 2 stages cooling, auto changeover
4 settings per day
24 vac
Keypad lockout
5-minute compressor protection
Occupied with lights on, unoccupied with lights off
NEVERLOST memory
3 security levels
50QE900-NPWS
Aquazone Non-programmable 2 stages heating, 2 stages cooling, auto changeover
5-minute built-in compressor protection
Locking cover included
Fahrenheit and Celsius temperature scales
Large display
Keypad lockout
Backlit display or B terminal
NEVERLOST memory
Dual set point with adjustable deadband
Back plate with terminals
50QE900-511WS
Aquazone 5-1-1 day programmable 2 stages heating, 2 stages cooling, auto changeover
5-minute built-in compressor protection
Keypad lockout and locking cover included
Fahrenheit and Celsius temperature scales
4 settings per day
Backlit and configurable display
O or B terminal
NEVERLOST memory
Dual set point with adjustable deadband
Self prompting program
50QE900-250FS
Aquazone Flush Mount, 7-Day Programmable 2 stages heating, 2 stages cooling, auto changeover
4 settings per day, Holiday/vacation programming
Self prompting program with copy command locking
cover plate with tamperproof screws
Fahrenheit and Celsius temperature scales
Set point limiting
Mounts flush to the wall
NEVERLOST memory
Dual set point with adjustable deadband and B terminal
Remote sensor capability (sold separately): Wireless,
(33CSRFS-RC transmitter and 33CSRFS-RE receiver),
wired with override (33CSCEN-WB), duct mounted (33CSSEN-DS)
AUTO
Pm
COOL
HEAT
Carrier
®
AUTO
Pm
COOL
HEAT
Carrier
®
COOL
HEAT
AUTO
R
COOL
HEAT
AUTO
R