Bryant TEMPSURE COMMERCIAL THERMOSTAT User Manual
installation, start-up and
service instructions
TEMPSURE COMMERCIALTHERMOSTA T
(P/N TSTATBBP220-LA)
Cancels: New II TSTAT-8
11/1/98
CONTENTS
Page
SAFETY CONSIDERATIONS ...................... 1
GENERAL ..................................... 1
INSTALLATION ................................ 1-6
I. Select Thermostat Location ................ 1
II. Install Thermostat ........................ 2
III. Set Clock ................................ 3
IV. Heat Pump Configuration .................. 3
V. Configure Advanced Setup ................. 3
VI. Install Accessories ........................ 4
VII. Program Thermostat Schedules ............. 4
VIII. Calibrate Temperature Sensor .............. 6
IX. Light Sensor Adjustment .................. 6
X. Check Thermostat Operation ............... 6
XI. Final Checklist ........................... 6
OPERATION ................................... 7
I. Auto-Changeover ......................... 7
II. Light-Activated Operation .................. 7
III. Two-Stage Operation ...................... 7
IV. Clock Backup ............................ 7
V. Fan Operation ............................ 7
VI. Emergency Heat .......................... 7
VII. Electric Heat ............................. 7
VIII. Holiday Mode ............................. 7
IX. Keypad Lock ............................. 7
TROUBLESHOOTING ............................ 8
IMPORTANT: Read entire instructions before starting the
installation.
SAFETY CONSIDERATIONS
Read and follow manufacturer instructions carefully. Follow
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-
. When the safety alert symbol is present on equip-
bol
ment or in the instruction manual, be alert to the potential
for personal injury.
Understand the signal wordsDANGER,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 hazard 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 7-day, commercial, programmable thermostats are wallmounted, low-voltage thermostats which maintain room temperature by controlling the operation of an HVAC (heating,
ventilation, and air-conditioning) system. Separate heating
and cooling set points and auto-changeover capability allow
occupied and unoccupied programming for energy savings.
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™
memory stores programmed schedules for an unlimited time
while the clock continues to run for at least 48 hours.
The thermostat can be configured to accept several different
equipment configurations, including heat pump operation.
NOTE: The thermostat is not factory-configured for use in
heat pump applications. The advanced setup must be performed to configure the thermostat for use with heat pump
units.
A light sensor is provided on the thermostat for light
activation. When the sensor detects light (the space is
occupied), the thermostat will enter Occupied 1 mode. If
the room is dark, the thermostat will follow its programmed
schedule.
INSTALLATION
I. SELECT THERMOSTAT LOCATION
The thermostat should 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 41 to 104 F
(5 to 40 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)
II. INSTALL THERMOSTAT
WARNING:
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 unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from the wall.
b. Disconnect wires from existing thermostat. Do not
allow wires to fall back into the wall. As each wire
is disconnected, record wire color and terminal
connection.
c. Discard or recycle old thermostat.
NOTE: Mercury is a hazardous waste and must be disposed
of properly.
3. Remove the thermostat cover from wall plate (mounting base) to expose mounting holes. See Fig. 1. With
the thermostat facing forward, press the back plate on
the left hand side top corner to release the two prongs
holding on the cover.Pulloff the cover when the prongs
have been disengaged.
4. Route thermostat wires through large hole in mounting base. Remove outer sheath from wires for added
flexibility. Standard solid or multi-conductor thermostat wire should be used from the thermostat to the
unit. Size and length considerations are as fol-
lows: for a maximum distance from unit of 36 ft,
use 22AWG(American Wire Gage) wire; for a maximum distance from unit of 100 ft, use 18AWGwire.
5. Level mounting base against wall and mark wall through
the 2 mounting holes in base.
3
6. Drill two
⁄16-in. mounting holes in wall where marked.
7. Secure mounting base to wall with 2 screws and
anchors provided. Ensure all wires exit through hole
in mounting base.
8. Adjust wire length and routing to allow proper closure
of the thermostat. Strip each wire at the end no more
1
⁄4-in. to prevent adjacent wires from shorting to-
than
gether. Match and connect wires to terminals on the
thermostat. See Fig. 2-4 and Table 1.
CAUTION:
Improper wiring or installation may cause
damage to the thermostat. Check to ensure wiring is
correct before proceeding with installation of unit.
9. Push excess wiring into wall. Seal hole in wall to prevent drafts.
10. Re-attach thermostat cover to back plate by aligning
the top two prongs of the back plate in the vertical groove
of the top cover and then snapping the cover onto the
back plate.
11. Turnon power to unit. The thermostat will receive power
from the unit. The thermostat will be powered by 24 v,
nominal (18 to 30 vac). Terminals R (+ 24 v), W1/O/B
(first stage heat or reversing valve), Y1 (first stage cooling), and G (fan relay) will always be connected. Some
applications will use C (common),Y2 (second stage cooling), or W2 (second stage heating).
WARNING:
Be careful not to drill into wiring in wall.
Electrical shock could result.
Fig. 1 — Thermostat Mounting
W2 — Second-Stage
Y2 — Second-Stage
RS2 — Not Used
RS+5 — Not Used
RS1 — Not Used
RS
GND
Heat
Compressor
— Not Used
Fig. 2 — Thermostat Wiring
LEGEND
W1/O/B — First-Stage Heat or
Y1 — First-Stage Compressor
G—Fan
W3/ECO — Third-Stage Heat or
CK1 — Not Used
CK2 — Not Used
R—24 vac Transformer
C—24 vac Transformer
Reversing Valve
Economizer (Not Used)
Common
—2—
THERMOSTAT
W2Y2R
O
W1
B
G
C
Y1
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
24 VAC RETURN
2nd STAGE HEAT CIRCUIT
TYPICAL
UNIT
L
E
C
G
Y1
O
W1
R
Y2
W2
Fig.3—Typical Wiring (Single-Stage Cooling Units)
THERMOSTAT
W2Y2R
B
O
W1
Y1
G
C
24 VAC COMMON
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
24 VAC RETURN
2nd STAGE COMPRESSOR RELAY
2nd STAGE HEAT CIRCUIT
FAN RELAY
TYPICAL
UNIT
L
E
C
G
Y1
O
W1
R
Y2
W2
Fig.4—Typical Wiring (Two-Stage Cooling Units)
Table 1 — Thermostat Wiring Terminations
EXISTING
WIRE
DESIGNATION
GorF Fan G
Y1, Y, or C Cooling Y1
W1, W, or H Heating W1/O/B
Rh, R, M, Vr, or A Power (24 v) R
C Common C*
O/B Reversing Valve W1/O/B†
Y2 Second Stage Cooling Y2*
W2 Second Stage Heating W2*
*Terminals C, W2, and Y2 may not be used in all applications.
†Used on Heat Pump applications only.
FUNCTION
TERMINAL
CONNECTION
III. SET CLOCK
The Set Clock button allows the user to change the time and
day displayed on the thermostat. Press the Set Clock button.
The current time will blink on and off. Press the UPARROW
and DOWN ARROW buttons until the correct time is shown.
Hold down the buttons to quickly move through the time display. The AM and PM annunciators will automatically change.
Hold down the Fan button while pressing UP ARROW or
DOWN ARROW to change the time by hours instead of minutes. To ensure the schedules are properly followed, make sure
that AM or PM is correct for the time chosen. When the correct time is shown, press the Mode button to modify the day
of the week. The current day will blink on and off. Press the
UP ARROW and DOWN ARROW buttons until the correct
day is shown. Press the Set Clock button again to exit the
Set Time mode.
IV. HEAT PUMP CONFIGURATION
To configure the thermostat for heat pump operation, Advanced Setup Steps 3 (Heat Pump Operation) and 4 (Reversing Valve Polarity) must be configured correctly. See the
Configure Advanced Setup section for information on configuring these options.
NOTE: Some large commercial rooftop heat pump units (542J)
must be configured with Advanced Setup Step 3 (Heat Pump
Operation) set to OFF. Refer to the base unit instructions for
more information.
V. CONFIGURE ADVANCED SETUP
To enter into the advanced setup screens of the thermostat,
press the Mode and Program buttons at the same time. 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. There are 15Advanced Setup Steps.
See Table2. Press the Program button at any time to exit the
Advanced Setup mode.
NOTE: Advanced Setup Steps 1 and 2 are configured with
the Set Clock button, and are not accessed through the
advanced setup screens.
A. Heat Pump Configuration (Steps 3 and 4)
T oset the thermostat for heat pump operation,Advanced Setup
Step 3 must be configured to ON. Use the UP and DOWN
ARROW buttons to configure the step. The default is OFF.
Press the Mode button to continue to Step 4. Step 4 is used to
set the reversing valve polarity for the heat pump. The variable can be set to either ‘‘B’’ or ‘‘O.’’ Set the reversing valve
polarity to the correct value depending on the application. The
default is ‘‘O.’’
NOTE: Step 4 will appear only if Step 3 is set to ON. Step 5
will appear only if Step 3 is set to OFF.
Table 2 — Advanced Setup Configuration
STEP DESCRIPTION RANGE DEFAULT
1* Time of Day
2* Day of the Week
3 Heat Pump Off/On Off
4
5 Electric Heat Off/On Off
6 Deadband 1 - 6 degrees 2
7
8 Cycles per Hour d, d1,2-6 6
9 Thermoglow™ Backlight Off/On On
10
11
12 Temperature Units F/C F
13 Security Level 0 - 3 0
14
15
*Accessed and configured through the Set Clock button.
Reversing Valve
Polarity
Forced Minimum
Temperature Difference
Reset Service
Filter Icon
Service Filter
Run Time
Maximum Allowable
Heat Set Point
Minimum Allowable
Cooling Set Point
12:00 AM -
11:59 PM
Sunday through
Saturday
O/B O
0 - 6 degrees 2
——
0-1950 hrs 500 hrs
35 - 99 F (1-37 C) 80 F (27 C)
35 - 99 F (1-37 C) 65 F (18 C)
12:00 AM
Monday
—3—
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