Carrier 33CS Installation And Operating Instructions Manual

Installation and Operating Instructions
IMPORTANT: Read entire instructions before starting
the installation.
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Select Thermostat Location . . . . . . . . . . . . . . . . . . . . . . 1
Install Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Changeover Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Set Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Configure Advanced Setup. . . . . . . . . . . . . . . . . . . . . . . 3
Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Program Thermostat Schedules. . . . . . . . . . . . . . . . . . 7
Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Calibrate Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Check Thermostat Operation. . . . . . . . . . . . . . . . . . . . . 8
Final Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10,11
Select Desired Temperature . . . . . . . . . . . . . . . . . . . . . 10
Four-Pipe Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Two-Pipe Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Keypad Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Clock Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Minimum Heat/Cool Temperature Difference . . . . 10
Single Set Point Operation . . . . . . . . . . . . . . . . . . . . . . 10
Dual Set Point Operation . . . . . . . . . . . . . . . . . . . . . . . . 10
Outside Air Temperature Sensor . . . . . . . . . . . . . . . . 11
Locking Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Dry Contact Switch/External Control . . . . . . . . . . . . 11
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

SAFETY CONSIDERATIONS

Read and follow manufacturer instructions carefully. Fol-
low all local electrical codes during installation. All wiring
must conform to local and national electrical codes. Improper
wiring or installation may damage thermostat.
Recognize safety information. This is the safety alert sym-
bol . When the safety alert symbol is present on equipment
or in the instruction manual, be alert to the potential for person-
al injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety alert symbol.
DANGER identifies the most serious hazards which will result
in severe personal injury or death. WARNING signifies a haz-
ard which could result in personal injury or death. CAUTION
is used to identify unsafe practices which would result in minor
personal injury or property damage.

GENERAL

The fan coil programmable thermostats are wall-mounted or
unit-mounted, low-voltage thermostats which maintain room
temperature by controlling the operation of a fan coil unit.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Book 1 4
Tab 11a 13a
Part Number 33CSSP2-FC
Catalog No. 533-30020 Printed in U.S.A.

Programmable Thermostat

Separate heating and cooling set points, auto-changeover
capability, 2-pipe or 4-pipe configurability, and single or dual
set point options allow for greater flexibility.
The thermostats are normally wall-mounted for 42C and
42D fan coil units. For 42S and 42V fan coil units, the thermo-
stat is mounted on the fan coil unit or inside the fan coil unit on
a junction box. For 42S and 42V fan coil units, the thermostat
may also be remote wall-mounted, if desired.
All thermostats allow up to 4 time/temperature settings to
be programmed per 24-hour period. Each thermostat stores
programs for 7 independent days. Batteries are not required.
During power interruption, the internal NEVERLOST™ mem-
ory stores configuration settings for an unlimited amount of
time while the clock continues to run for at least 48 hours.
The thermostat can be configured to accept several different
equipment configurations, including 2-pipe or 4-pipe operation.
The temperature display range of the thermostat is 35 to
99 F (2 to 36 C).
NOTE: The thermostat is factory-configured for use in 4-pipe
applications. The advanced setup must be performed to config-
ure the thermostat for use with 2-pipe applications.

INSTALLATION

Select Thermostat Location -

be mounted:
• approximately 5 ft from the floor
• close to or in a frequently used room, preferably on an
inside partitioning wall
• on a section of wall without pipes or ductwork
• where temperature operating limits are within 32 to 122 F
(0° to 50 C)
• where humidity operating range is within 0 to 95% relative
humidity, non-condensing
The thermostat should NOT be mounted:
• close to a window, on an outside wall, or next to a door
leading to the outside
• where exposed to direct light and heat from a lamp, the sun,
a fireplace, or any other temperature-radiating object which
may cause a false reading
• close to or in direct airflow from supply registers or return-
air grilles
• in areas with poor air circulation (such as behind a door or
in an alcove)

Install Thermostat

Before installing thermostat, turn off all power to the unit.
There may be more than one power disconnect. Electrical
shock can cause injury or death.
1. Turn off all power to fan coil unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from the wall or unit.
Form 33CS-56SI Pg 1
33CS
Fan Coil
The thermostat should
11-04 Replaces: 33CS-52SI