TCS Basys Controls SZ1009 User manual

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1
Communicating Thermostats
Communicating Thermostats
SZ1009
Conventional Heating & Cooling
Thermostats with Heat Pump Mode
Product Manual
Description
The SZ1009 is a microprocessor-based programmable
thermostats designed for conventional heating and cool-
ing applications with optional heat pump mode. The
SZ1009 features a 7-day time clock.
Features
• Stand-alone or network operation
• Adjustable delay on power-up and start-up for soft
starts
• P+I control option
• Smart Recovery
• No battery backup required
• Built-in HVAC equipment protection
• 32 character LCD display
• 6 status LEDs
• Remote room sensing capability
• User setpoint adjustment limits
• Local and remote override capability
• System and fan switching with access lockouts
• Equipment monitoring inputs and indication
• External time clock input
• Access to programming or schedule may be locked
out or limited with the use of an access code
• Fahrenheit or Celsius temperature display
• Convertible to heat pump mode in programming
Contents
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features ....................................1
Mounting....................................1
Wiring ......................................2
Setup ......................................3
Programming ................................4
Setting Clock & Schedule.......................6
Program Options & Operating Features............7
Checkout & Troubleshooting ....................10
LED Description ..............................12
User’s Guide.................................12
Mounting
The SZ1009 is designed for wall mounting using two
#6-32 machine screws sheet metal screws, either over
a horizontally installed 2” x 4” junction box, or directly to
block or drywall.
For best results, the thermostat should be mounted on
an interior wall which reflects normal room environment,
at a height of approximately five feet from the floor.
Avoid areas exposed to direct sunlight, unusual heat
or cool sources, open doors and windows, unventilated
locations and hot or cold air from diffusers.
If using a remote room sensor, it should be mounted in
the manner described above. The thermostat may then
be mounted in an area which is accessible for adjusting
its settings.
Caution: Remove power from thermostat
prior to mounting.

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POWERING THE SUPERSTAT
Superstats are powered from 24 VAC +/- 20%.
If wiring for communications, dedicated power must be
used to power the Superstat. Several “S” Series thermo-
stats may be powered from the same transformer, provid-
ed that the transformer has sufficient power. (Superstats
require 8 VA @ 24 VAC.)
Caution: Do not connect to 120 VAC. When multiple
TCS Basys Controls devices are using a single
transformer, the polarity of the power wiring
must be maintained because all TCS devices
are half-wave rectified and have common
return paths.
When the Superstat is used as a stand-alone or wireless
thermostat without communications, the unit transformer
may be used to power it. To do this, install a jumper
between the “R” and “+24” terminals. The “24-” terminal
must then be connected to the common side of the unit
transformer.
Wiring
The SZ1009 uses standard terminal designations for wir-
ing. See diagram below.
REMOTE TEMPERATURE SENSOR WIRING
Use 18 AWG shielded twisted-pair grounded at the sen-
sor mounting location. Sensor wiring runs of up to 250
feet are attainable if properly shielded wire is used and
the installation environment is free of electrical noise.
Sensor wire should be kept at least five feet away from
line voltage wiring.
The SZ1009 accepts three. Consult the TS Series
Temperature Sensor Submittal Data Sheet for a com-
plete listing of packaging and application styles. When
using TCS Basys Controls three-wire sensors, use the
black and red leads and either clip or twist off the white
lead. Make sure that the dip switches are set for the
sensors you are using.
1
For communication wiring, use twisted,
shielded 22 AWG. Must be run
separately.
2
Dry momentary contact. Must not be
powered
3
24 VAC transformer.
See powering instructions.
4
Dry contact. Must not be powered.
5
Sensor input wiring 18 AWG,
twisted, shielded pair.
6
Up to nominal 28 VAC from
equipment transformer.
Remote
Zone/Return
Air Temp
R W1 Y1 G
DI3 0VR T1 T1+24 – DI1 DI2
REF A B
T2 T2 T3 T3
6
AB
REF
In Heat Pump Mode
W1=B/O

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Setup
Note: If using remote sensor(s), the calibra-
tion may need to be adjusted. See “Checkout and
Troubleshooting” section.
TEMPERATURE SENSOR SELECTION
The dipswitches in the cover (shown above) must be
set when using remote room, discharge, and/or outdoor
sensors.
Use the following guide to determine the dipswitch set-
tings for your application.
Using built-in room sensor only.
(This is the default setting.)
Using built-in room sensor with
discharge air sensor only.
Using built-in room sensor with
outdoor air sensor only.
Using built-in room sensor with
both discharge and outdoor air
sensors.
Using remote room sensor only.
Using remote room sensor with
discharge air sensor only.
Using remote room sensor with
outdoor air sensor only.
Using remote room sensor with
both discharge and outdoor air
sensors.
KEYPAD ACCESS
The dipswitches in the thermostat cover (shown above)
must be set in order to lock the user out of the program
and/or to set the clock and schedule. Use the guide
below to set these dipswitches for your application.
User access may also be limited with an access code
set in programming. (The fan and system switches are
enabled or disabled in programming only, and require no
dipswitch placement.)
Keypad access to both
programming and clock setup.
(This is the default setting.)
No keypad access to programming
or clock setup.
Keypad access to
programming only.
Keypad access to clock
setup only.
Once the dipswitches have been set
and you have confirmed that the sen-
sors are reading correctly (and pro-
gram and clock setup are finished, if locking out access
with dipswitches), secure the cover to the base with the
two set screws located at the top right and the left side.
1 2 3 4 5
1 2 3 4 5

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SET ADDRESS:
000
Programming
The SZ1009 may be programmed through the keypad on
the face, or with a PC.
If programming with a PC, the following must be set via
the display and keypad prior to programming:
• Address (step #2)
• Baud rate (step #3)
• Temperature scale (step #4)
For more information on programming through the PC,
consult your TCS software manual.
PROGRAMMING THROUGH THE KEYPAD
To access the programming screens, press the program
setup button. To make changes, use the warmer and
cooler keys. Access may be locked out with dipswitch-
es, or an access code may be required.
fan
Occu pied
Heating
Cooling
Fan
Service
Program/
COOLER
WARMER Data
switch
system
switch
program
setup
clock
setup
override
service
status
Main Monitoring Screen. Press the pro-
gram setup button to access the following
screens.
Access Code Entry Screen. Will appear
if access code is required for program-
ming. 248 is the default code. If the
wrong code is entered, it will revert to the
previous screen.
Controller Address Screen. If using
a PC to program, set a unique address
from 0 to 255, excluding 248. All control-
lers on a network must have a separate
and unique communications address.
Communication Baud Rate Screen.
If using a PC to do programming, all
controllers on a network must be set to
the same baud rate. Choose between
2.4K, 4.8K, 9.6K and 19.2K.
Display Type Screen. Choose between
FAHRENHEIT and CELSIUS for tem-
perature indication.
Controller Type Screen. Choose
Conventional or Heat Pump mode. Unit
will reset (the screen will momentarily
go blank) immediatley after choice is
altered.
WARNING if you switch between
CONVENTIONAL and HEAT PUMP
modes, some digital output functions
change. Refer to the Mode Conversion
Table on Page 6. All the rest of the menus
will remain unaltered.
System Access Screen. Choose
whether or not to enable user’s access
to the system switch to set the system
mode.
System Mode Screen. Choose from
AUTO, HEAT, COOL, or OFF for your
system mode. In the OFF mode, no
contacts shall close.
Fan Access Screen. Choose whether
or not to enable the user’s access to the
fan switch to set the occupied fan mode.
(See page 8.)
Occupied Fan Mode Screen. Choose
between AUTO (continuous), ON (gas
heat or no heat), or COOL for your fan
run times during the occupied modes.
Unoccupied Fan Mode Screen.
Choose from ON, COOL or AUTO for
your fan run times in the unoccupied
mode.
Occupied Heat Setpoint Screen.
Set the heat setpoint for this occupied
period.
program
setup
program
setup
2.
program
setup
SET BAUD RATE:
9.6k
3.
program
setup
TEMP SHOWN IN:
FAHRENHEIT
4.
program
setup
SET UNOCCUPIED
FAN MODE: AUTO
10.
program
setup
SET OCCUPIED FAN
MODE: AUTO
9.
program
setup
USER ACCESS TO
FAN MODE? YES
8.
program
setup
SET SYSTEM
MODE: AUTO
7.
program
setup
USER ACCESS TO
SYSTEM MODE? YES
6.
program
setup
OCCUPIED HEAT
SETPOINT A: 70F
11.
ENTER ACCESS
CODE 000
program
setup
1.
program
setup
CONTROLLER TYPE:
CONVENTIONAL
5.
MON
12:00 AM 72F

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Occupied Heat Setpoint Screen.
Set the heat setpoint for this occupied
period.
Occupied Heat Setpoint Screen.
Set the heat setpoint for this occupied
period.
Occupied Heat Setpoint Screen.
Set the heat setpoint for this occupied
period.
Unoccupied Heat Setpoint Screen.
Set the unoccupied heat setpoint.
Occupied Cool Setpoint Screen.
Set the cool setpoint for this Occupied
period.
Occupied Cool Setpoint Screen.
Set the cool setpoint for this Occupied
period.
Occupied Cool Setpoint Screen.
Set the cool setpoint for this Occupied
period.
Occupied Cool Setpoint Screen.
Set the cool setpoint for this Occupied
period.
Unoccupied Cool Setpoint Screen.
Set the unoccupied cool setpoint.
User Setpoint Limit Screen. Enter the
number of degrees you want the user to
be allowed to change the preset occupied
setpoints up or down.
Override Time Screen. Enter the number
of minutes (0 to 255) that the Superstat will
maintain occupied setpoints when over-
ridden.
Heat Stage 1 Differential Screen. Enter a
differential value for heat stage 1.
Cool Stage 1 Differential Screen. Enter
a differential value for cool stage 1.
Control Mode Screen. Enter if you want
to control by temperature only (P) or add a
time factor (P+I).
Discharge Air Sensor Function Screen.
Choose whether or not you are using a
discharge air sensor function. To monitor
only, select NO. See setup instructions for
dipswitch settings which must also be set.
Discharge Air Low Limit Screen.
Enter a discharge air low limit value. This
screen will not appear if the discharge air
sensor function is disabled.
Discharge Air High Limit Screen. Enter
a discharge air high limit value. This
screen will not appear if the discharge air
sensor function is disabled.
program
setup
SET OVERRIDE
TIME: 180 MINUTES
22.
program
setup
UNOCCUPIED COOL
SETPOINT: 80F
20.
program
setup
HEAT STAGE 1
DIFF: 1F
23.
program
setup
COOL STAGE 1
DIFF: 1F
24.
program
setup
SET CONTROL
MODE: P
25.
program
setup
DISCHARGE AIR
LOW LIMIT: 045F
27.
program
setup
DISCHARGE AIR
HIGH LIMIT: 125F
28.
program
setup
ENABLE DISCHARGE
AIR SENSOR? NO
26.
program
setup
OCCUPIED HEAT
SETPOINT C: 70F
13.
program
setup
OCCUPIED HEAT
SETPOINT B: 70F
12.
program
setup
OCCUPIED HEAT
SETPOINT D: 70F
14.
OCCUPIED COOL
SETPOINT A: 75F
program
setup
16.
OCCUPIED COOL
SETPOINT C: 75F
program
setup
18.
OCCUPIED COOL
SETPOINT D: 75F
program
setup
19.
OCCUPIED COOL
SETPOINT B: 75F
program
setup
17.
program
setup
UNOCCUPIED HEAT
SETPOINT: 60F
15.
program
setup
LIMIT SETPOINT
ADJUST +/-: 05F
21.

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Outdoor Air Sensor Function Screen.
Choose whether or not you are using an
outdoor air sensor function. To monitor
only, select NO. See setup instructions
for dipswitch settings which must also
be set.
Cooling Lockout Screen. Enter an
outdoor air cooling lockout temperature.
This screen will not appear if the outdoor
air sensor function is disabled.
Heating Lockout Screen. Enter an
outdoor air heating lockout temperature.
This screen will not appear if the outdoor
air sensor function is disabled.
DI1 Choice Screen. Choose DI1 as
FAN PROVING or a MONITOR point.
Select MONITOR if unused.
DI2 Choice Screen. Choose DI2
as SERVICE, or MONITOR. Select
MONITOR if unused.
DI2 Shift Screen. Enter the setpoint
shift value. This screen will only appear
if DI2 is set to MONITOR.
DI3 Choice Screen. Choose FILTER
SERVICE, EXTernal OVERRIDE, or
EXTernal TIME CLOCK. Select EXTernal
OVERRIDE if unused.
Delay On Powerup Screen. Enter a
value in seconds, such that when the unit
is powered up, all outputs are delayed for
this time period before they are allowed
to close.
Smart Recovery Screen. Choose
whether or not smart recovery will be
used. Note: Smart Recovery is not
available when DI3 is used as EXTernal
TIME CLOCK.
HEAT PUMP MODE CONVERSION TABLE
• Cool 1 Becomes Compressor
• Heat 1 Becomes Reversing Value
• Power up start up screen still displays “SZ1009”
• Everything else, not mentioned here, remains same as if it
is in conventional mode
Setting Clock & Schedule
The SZ1009 clock and schedule may be set through the
keypad and display, or with a PC. For more information
on programming through the PC, consult your TCS soft-
ware manual.
SETTING CLOCK & SCHEDULE
THROUGH THE KEYPAD
To access the clock and schedule screens, press the
clock setup button. To make changes, use the warmer
and cooler keys. For screens that have more than one
field to set, use the override key to move to the next
field. Access may be locked out with dipswitches, or an
access code may be required.
MON
72F
12:00 AM
SET DATE:
11-19-01
3.
1.
clo ck
set up
ENTER ACCESS
SET TIME & DAY:
MON
12:00 AM
2.
000
CODE
fan
Occup ied
Heating
Cooling
Fan
Service
Program /
COOLER
WARMER D ata
switch
service
status
system
switch
program
setup
clock
setup
override
ove rrid e
ove rrid e
11-19-01
clo ck
set up
clo ck
set up
clo ck
set up
program
setup
DELAY ON POWERUP
010 SECONDS
36.
program
setup
ENABLE SMART
RECOVERY? NO
37.
program
setup
DI3 USED FOR:
FILTER SERVICE
35.
program
setup
REQUIRE CODE FOR
PROGRAMMING? YES
38.
program
setup
REQUIRE CODE FOR
CLOCK/SCHED? YES
39.
program
setup
SET ACCESS
CODE: 248
40.
MON.
12:00 AM 72F
program
setup
ENABLE OUTDOOR
AIR SENSOR? NO
29.
program
setup
SET DI2 SETPOINT
SHIFT: 00F
34.
program
setup
COOLING LOCKOUT
TEMP: 60F
30.
program
setup
DI1 USED FOR:
MONITOR
32.
program
setup
DI2 USED FOR:
MONITOR
33.
program
setup
HEAT LOCKOUT
TEMP: 70F
31.
Programming Access Screen. Choose
whether or not a code will be required to
enter programming setup. A dipswitch
option to lock out access altogether is
also available.
Clock and Schedule Access Screen.
Choose whether or not a code will be
required to enter clock and schedule
setup. A dipswitch option to lock out
access altogether is also available.
Access Code Screen. Enter a second-
ary access (0 to 255) code that will be
used to enter the programming and/or
clock and schedule setups if access code
has been required in the last two steps.
This code can be given to your customer
and can be changed later. The primary
code is 248, it always works and cannot
be changed.
Main Monitoring Screen.

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Main Monitoring Screen. Press the
clock setup button to access the fol-
lowing screens.
Access Code Entry Screen. May
appear if access code is required for
setting clock and schedules. 248 is
the default code. If the wrong code
is entered, it will revert to the previ-
ous screen.
Time and Day Screen. Set the
hour, minutes, AM or PM, and day of
the week.
clock
setup
SET TIME & DAY:
12:00 AM MON
2. override
Schedule Announcement Screen.
Announces the next screen.
Occupied Times Screen. Set hours
and minutes of start and end times
for up to two occupied periods.
Occupied Times Screen. Set hours
and minutes of start and end times
for up to two occupied periods.
Schedule Announcement Screen.
Announces the next screen.
Copy Schedule Screen. Indicate
whether or not to use the same
schedule that was used for the previ-
ous day. If the same schedule is
used, the following 2 screens are not
displayed.
Occupied Times Screen. Set hours
or minutes of start and end times for
up to two occupied periods.
Occupied Times Screen. Set hours
and minutes of start and end times
for up to two occupied periods.
SET OCCUPIED
TIMES MONDAY:
clock
setup
3.
SET OCCUPIED
TIMES TUESDAY:
clock
setup
6.
COPY MON FOR
TUE? NO
clock
setup
7.
A:08:00 TO 12:00
B:00:00 TO 00:00
clock
setup
8. override
Operation
UNOCCUPIED SETBACK
The SZ1009 operates in either an occupied or unoc-
cupied mode. During the occupied mode, the occupied
heating and cooling setpoints will be maintained, and
the fan will operate according to its occupied setting.
During the unoccupied mode, the unoccupied heating
and cooling setpoints will be maintained, and the fan
will operate according to its unoccupied setting. The
occupied LED will be lit when the unit is operating in the
occupied mode.
The occupied schedule may be set utilizing the internal
time clock or DI3 may be used with an external time
clock, where- as when DI3 is closed, the unit is in the
occupied mode. The Smart Recovery function is dis-
abled when DI3 is used for external time clock.
OVERRIDE
A timed override is available using the button on the
face of the thermostat or through momentary contacts
wired into the OVR terminal. The amount of time the
unit will be overridden is set from 0 to 255 minutes in
the programming screen. This override behaves differ-
ently depending on the mode the thermostat is operating
in (occupied or unoccupied) and the options that have
been enabled within the software. In standard mode, the
override only activates in unoccupied mode and takes
the thermostat into occupied mode. If "Override for
Occupied Period" is enabled, the override also activates
in occupied mode and takes the thermostat into unoccu-
pied mode. In either case, you are able to view the time
remaining in the override period both within the software
and by using the service button to scroll through the sta-
tus screens. If the occupant desires to return the ther-
mostat to unoccupied or occupied operation (depending
on how the override was used) before the time interval
is up, they may press the override again. If "Continuous
Occupied Override" or "Continuous Unoccupied
Override" is enabled, then pressing the override once
and then pressing and holding it for 5 seconds puts the
thermostat into a "hold” mode (the override LED on the
thermostat will flash quickly). In this mode, the over-
ride setpoints are used until the next occupied period is
reached, or until the thermostat is manually taken out of
the "Continuous Override" mode by pressing the over-
ride again.
Continuous override is available through the DI3 contact
or the software. If DI3 is set to external override, the unit
will be in the occupied mode whenever the DI3 contact
is closed. When using this option, the timed override
may still be activated.
The software allows you to override the thermostat by
putting the override parameter into the remote mode,
and thus disabling the timed override.
clock
setup
MON
12:00AM 72F
clock
setup
ENTER ACCESS
CODE 000
1.
A:08:00 TO 12:00
B:00:00 TO 00:00F
4. override
clock
setup
C:00:00 TO 00:00
D:00:00 TO 00:00
clock
setup
5. override
The following screens are repeated for
Wednesday,ThursdayFridaySaturday,Sunday.
MON
12:00 AM 72F
Main Monitoring Screen.
C:00:00 TO 00:00
D:00:00 TO 00:00
9. override
clock
setup

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SETBACK AND OVERRIDE APPLICATIONS
In most applications, it is desired to maintain a regular
schedule, and allow timed override with the button on
the face or with a remote momentary contact.
To allow a regular schedule, and also automatically
override with the use of an occupancy or light sensor,
set DI3 to external override and set it up so that the con-
tact is closed when you want the override.
For applications where a room might not be used on a
regular schedule, such as conference rooms, set DI3
to external time clock and close the contact when you
want the room occupied, such as with a switch or wind-
up timer. If each occupancy period is about the same,
(theaters, meetings) another option is to set the DI3 to
external override, and use the timed override button to
put the unit in occupied mode.
To make the unit always occupied, set DI3 to external
time clock and short the DI3 terminal to ground.
DISCHARGE AIR TEMPERATURE SENSING
The SZ1009 accepts a remote discharge air sensor for
monitoring purposes. (See setup instructions for dip-
switch placement for this option.)
Choose YES in programming screen #26 only if you are
using a discharge air sensor and you want to enable the
discharge air temperature high and low limit functions. If
NO is chosen, the discharge air will still be monitored.
When the function is enabled, a HIGH LIMIT and LOW
LIMIT are entered in steps #28 and #27. If the HIGH
LIMIT is reached, the fan and heating stages will be
turned off and will remain off until the discharge air
temperature falls 3° below that limit. If the LOW LIMIT
is reached, the fan and cooling stages will be turned off
and will remain off until the discharge air rises 3° above
that limit. When either limit is reached, the service LED
will be on until normal operation resumes.
The discharge air span is 0°F to 150°F (-17.8°C to
65.6°C).
OUTDOOR AIR TEMPERATURE SENSING
The SZ1009 accepts a remote 1000 Ω outdoor tempera-
ture sensor for monitoring purposes. (See setup instruc-
tions for dipswitch placement for this option.)
Choose YES in programming screen #29 only if you are
using an outdoor air sensor and you want to enable the
outdoor air heating and cooling lockout functions. If NO
is chosen, the outdoor air will still be monitored.
When the function is enabled, a COOLING LOCKOUT
TEMP and HEATING LOCKOUT TEMP are entered
in steps #30 and #31. If the outdoor temperature falls
below the COOLING LOCKOUT TEMP, all cooling
stages will be locked out and will remain locked out until
the outdoor air temperature rises 2° above the lockout
temperature. If the outdoor temperature rises above the
HEATING LOCKOUT TEMP, all heating stages will be
locked out and will remain locked out until the outdoor
air temperature falls 2° below the lockout temperature.
The outdoor air span is -40°F to 160°F (-40.0°C to
71.1°C).
FAN PROVING
The SZ1009 allows DI1 to be set for fan proving to pro-
tect equipment on fan failure. To utilize this function,
input a pressure or current switch which tells when the
fan is running. If the thermostat closes its fan contact,
and the DI1 is not closed after thirty seconds, the sys-
tem will go to OFF, disabling all outputs, the fan LED will
turn off, and the service LED will be lit until the system is
manually reset by switching the system to a mode other
than OFF.
DI2 SETPOINT SHIFT
The SZ1009 allows DI2 to be set for setpoint shift for
energy demand setback. This is enabled by setting DI2
to the MONITOR mode. A digital contact that closes
when setback is needed should be wired into DI2. You
may specify a number of degrees such that, when the
thermostat is operating in the occupied mode, and DI2
is closed, the heating setpoint will be lowered this num-
ber of degrees, and the cooling setpoint will be raised
this number of degrees. The fan will continue to operate
according to its occupied setting. If you are using DI2 as
monitor for another purpose, make sure to set this value
to zero.
STAGE OUTPUT PARAMETERS
For each stage of heating and cooling, you may specify
an offset and a differential value. This allows you to
adjust the operation of the thermostat to fit your equip-
ment to the building load. The offset value is the amount
away from the setpoint a stage will turn off. By assign-
ing a stage a value other than zero, you “anticipate”
that the residual heat or cooling in the duct or the other
stages will bring the temperature back to setpoint. In
most cases, the first stage is set to zero. The differential
value is the difference between the on and off points.
This value depends on the load and on the equipment
size. If the equipment is large for the load, you may want
to make this value as high as 5 to prevent equipment
cycling. If the equipment is small compared to the load,
or if tight control is desired, you may want to make this
value as low as 1.
The fact that the stages are configurable allows unused
stages to be set to activate physical alarms if desired.
In summary, unlike most other multi-stage program-
Heat Setpoint
Cool Setpoint
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Differential
Differential
Offset
Offset
Differential
Differential

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mable thermostats, the Superstat allows independent
adjustments of “offsets” and “differentials” for stages of
heating and cooling. The offset settings can be viewed
as setpoints for the second and third stages and are
programmed in the Superstat in the number of degrees
(i.e. 1,2,3 ... ) beyond the heating and cooling setpoints
(temperatures to be maintained).
The differential for each stage can be viewed as the
“anticipator” function used in mechanical thermostats.
P + I OPTION
The SZ1009 also has a P+I option. Without enabling
this option, stages turn on and off based on temperature
vs. setpoint alone, as described above. By enabling this
option, you allow a time factor to be added. This is use-
ful when you are forced to have a large differential due
to equipment size. At times when the building load is
low, the temperature could potentially sit a few degrees
off setpoint for some time. With the time factor added,
the thermostat would compensate for this, turning on
the equipment even though the temperature had not
reached the limits described above.
SMART RECOVERY
“Smart Recovery” may be enabled to insure occupant
comfort while saving money. It takes the building load
into consideration and ramps the setpoint when going
from the unoccupied mode to the occupied mode. At the
beginning of the occupied mode, the occupied setpoint
will be reached, many times without the need for the
second stage to come on. This feature is automatically
disabled when DI3 is set to external time clock.
DIGITAL APPLICATION LED SERVICE SCREEN CONTROL SENSOR OR
INPUT INDICATION? (DI STATUS SCREEN) PROVIDED DEVICE NEEDED
DI1 Fan Proving YES CHECK FAN, YES - turns system mode to "off" Differential
FAN OK — requires manual re-start pressure or
or FAIL (set system to auto) current switch
DI1 Equipment NO OK NO Dry contact, switch. Any type
Monitoring (DI1 OPEN or CLOSED) for monitoring and indication
DI2 Service Alert YES OK or CHECK DI2 NO Dry contact, switch. Any type
(DI2 SERVICE OFF or ON) for monitoring and indication
DI2 Monitor with NO OK YES - shifts setpoint by Dry contact, switch.
setpoint shift (DI2 OPEN or CLOSED) programmed amount
DI3 Filter Service YES OK or CHECK FILTER NO Differential pressure switch
(FILTER OK or CHECK)
DI3 External Occupancy Override NO OK YES - switches to occupied mode Dry contact such as twist
(EXT OVER ON or OFF) as long as contact is made timer, light switch, etc.
DI3 External Time Clock Input* NO OK YES -input overrides thermostat* Dry contact;
(EXT TIMECLOCK ON or OFF) occupancy program external time clock
(TCS part SL1001a)
Digital Input Summary Table
*See delay on Power-up.
BUILT-IN DELAYS
The SZ1009 has delays built into the programming
sequences to protect equipment. The fan has a mini-
mum on and off time of 30 seconds. When the fan is
in AUTO mode, it will come on 30 seconds before the
heating or cooling stages are allowed to sequence on,
and remain on for 2 minutes after the heating or cool-
ing stages sequence off. Each stage has a minimum on
and off time of two minutes. There is a minimum of two
minutes between when one stage turns on until the next
stage is allowed to turn on, as well as when one stage
turns off until the next stage is allowed to turn off.
DELAY ON POWER UP
The SZ1009 h as an adjustable delay on power up. When
several thermostats are used at one location, and the
power goes out, most thermostats turn all of the units
back on at the same time on regain of power, creating a
peak. The thermostat allows you to set a value, in sec-
onds, where no outputs are allowed to turn on for that
length of time on power up. Setting each unit to a differ-
ent delay allows you to soft start your system, and thus
prevent this peak. Note, this delay is also applied to the
start of occupied time.
HEAT PUMP MODE
If HEAT PUMP mode is selected in programming step 5,
then the SZ1009 will operate in heat pump mode. In
heat pump mode the Y terminal is is used for both heat-
ing and cooling, and the W terminal is used for control
of the reversing valve. The reversing valve is set to be
Open (Unpowered) for cooling by default and can only
be changed through communications.

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10
Checkout & Troubleshooting
CHECKOUT
Note: The fan has a minimum on and off time of 30 sec-
onds. The heating and cooling stages have a minimum
on and off time of 2 minutes.
You may verify the status of heating and cooling stages
and fan in monitoring screens #5, #6, and #7, which are
accessed by pressing the SERVICE STATUS button.
1. Verify all wiring prior to powering the thermostat.
2. Turn power on. The thermostat will display a momen-
tary screen with the model number , and then the
main monitoring screen with the time, day, and current
temperature.
3. Press the PROGRAM SETUP button until you reach
the screen #21 which allows you to set the occupant
setpoint adjustment limits. Change this to +/-20 °F
(11.1 °C). Press the PROGRAM SETUP button once
more to store the change. Then press the SERVICE
STATUS button once to exit the programming.
4. Press the FAN SWITCH button to access the fan
mode and change the mode to AUTO. Press the
FAN SWITCH button once more to store the change.
Press the SYSTEM SWITCH button to access the
system mode and change the mode to AUTO. Press
the SYSTEM SWITCH button once more to store the
change.
5. Verify that the thermostat is operating in the occupied
mode by making sure that the top LED is lit. If not,
press the OVERRIDE button. The LED should light
up.
6. Take note of the current temperature reading. Press
the WARMER (up) button. The setpoint adjustment
screen should now be showing. Press the WARMER
button until the heating setpoint is greater than the
current temperature by at least five degrees. The fan
will come on. The heating stage(s) will sequence on
after 30 seconds.
7. Press the cooler (down) button until the heating set-
point is one degree less than the current temperature.
The heating stage(s) will sequence off. The fan will
turn off 2 minutes after the last heating stage.
8. Press the cooler button until the cooling setpoint is
less than the current temperature by at least five
degrees. The fan will come on. The cooling stage(s)
will sequence on after 30 seconds.
9. Press the warmer button until the cooling setpoint is
greater than the current temperature by one degree.
The cooling stage(s) will sequence off. The fan will
turn off 2 minutes after the last cooling stage.
10. Go back to programming step #21 and set the set-
point adjust limit back to the desired value. Make any
other changes in programming, clock, and schedule.
Set the fan and system modes to their desired set-
tings.
11. If using remote sensors, verify that the reading is
correct. If not, see Wrong Temperature Display in the
Troubleshooting section.
TROUBLESHOOTING
No Display
Check for 24 VAC on terminals “+24” and “-24”. Check
ribbon cable connecting the cover to the base for a good
connection.
Fan Does Not Come On
The fan is on whenever the fan LED is on. If the
fan should be on, but the fan LED is off, check
the fan (FAN SWITCH button) and system modes
(SYSTEM SWITCH button), and the unoccupied fan
mode in programming. If the fan is off but the fan LED
is on, check wiring. Short terminals “R” to “G” and see
if the fan comes on. This is a check for a mechanical
relay failure.
Heating or Cooling Does Not Come On
At least one stage of heating is on whenever the heating
LED is on, and at least one stage of cooling is on when-
ever the cooling LED is on. If heating or cooling should
be on but the heating or cooling LED is off:
1. Check the fan and system switch modes.
2. Check the heating and cooling setpoints.
3. Check the room temperature to be sure heating or
cooling should be on.
4. Check the offsets and differentials.
5. If using outdoor air or discharge air high and low lim-
its, check their values to be sure heating or cooling is
allowed.
If heating or cooling is off, but the corresponding SED is
on, check the wiring. Short terminals “R” to “W1”, “Y1”,
or “G” and see if the heating, cooling, or fan comes on.
This is a check for a mechanical relay failure.
Wrong Temperature Display
Initially, verify the wiring connections to check for prob-
lems (poor connections, opens, or shorts). If the tem-
perature is at a minimum or maximum reading, check
that the sensor dipswitch positions are correct as shown
in the Setup section of this document. Also, verify the
resistance reading for the sensor in question. A remote
sensor should read 1080 to 1090 ohms at room temper-
MON
12:00AM 72F
* SZ1009 *
TCS V2.0 (c)
LIMIT SETPOINT
ADJUST +/-: 05F

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11
ature. The built-in sensor should read 108 to 109 ohms
at room temperature. If any of the temperatures are still
reading slightly high or low, you can add in a tempera-
ture offset (calibration) using Ubiquity or TCS Insight.
In Ubiquity, you can edit the calibration offset for each
temperature input (room, discharge, outdoor air, etc.) on
the controller's programming page. For example, if the
room temperature is reading 2 degrees high, you would
subtract 2 from the existing offset in the room tempera-
ture calibration offset field and submit the page. In TCS
Insight, the process is similar. Refer to the Calibrate
Using TCS Insight Tech Bulletin # 1019 for details. As
a last resort and only when directed to do so by TCS
technical support, you may be able to use the on-
board adjustment pots. Refer to the Thermostat Sensor
Calibration Tech Bulletin # 1005 for details.
Outputs Will Not Shut Off
First check room temperature and setpoints to determine
whether the output should be on. There are delays and
minimum on and off times for the fan and heating and cool-
ing stages. Also, check the service status menus to verify
that the outputs are on. Turning the system to “off” will
instantly turn all outputs off. The thermostat can be reset
by pressing the system switch button and the service status
button simultaneously.
Service LED is On
If the service LED is on, it may be for
monitoring purposes or it may indicate a
critical problem. The first monitoring screen,
which is used to indicate why the light is on,
can be accessed by pressing the SERVICE
STATUS button.
SERVICE SCREENS
Through repeated pressing of the SERVICE
STATUS button, the service screens (shown below) are dis-
played, which enables you to monitor various functions of
the Superstat.
Override Status Screen. Shows
whether the override is active and if so,
how many minutes remaining.
Stages Status Screen. Shows the
status of the first stage of heating and
cooling.
DI1 Status Screen. Shows the status
of DI1.
DI2 and DI3 Status Screen. Shows
DI2 status and filter status or DI3 status.
Main Monitoring Screen.
service
status
OVERRIDE ON
178 MINUTES
4.
service
status
HEAT STAGE 1 OFF
COOL STAGE 1 OFF
5.
service
status
DI2 OFF
FILTER OK
7.
service
status
DI1 OK
6.
MON
12:00AM 72F
service
status
T1
T2
T3
1 2
1 2 3 4 5
adjust display contrast
service
status
Main Monitoring Screen. Press the
service button to access the following
screens.
Service Screen. This message may
be followed by any or all of the follow-
ing: CHECK FILTER, CHECK FAN,
DISCHARGE HIGH, DISCHARGE LOW,
or CHECK DI2.
Discharge Air Temperature Screen.
Shows discharge air temperature if sen-
sor is used.
Outdoor Air Temperature Screen.
Shows outdoor air temperature if sensor
is used.
service
status
DISCHARGE AIR
TEMP 55F
2.
service
status
OUTDOOR AIR
TEMP 75F
3.
service
status
SERVICE STATUS
OK
1.
MON
12:00AM 72F

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12
PROGRAMMING
The ability to program control parameters is allowed by
factory default. An access code may be required as set in
programming step #38, or access may be denied altogether
using dipswitches described in the setup section.
User’s Guide
Inside the hinged door of the thermostat is the Superstat™
User’s Guide. This guide is designed to assist the installer
in explaining to the user how to operate their new thermo-
stat, as well as serve as a handy future reference for the
user.
We recommend the installer fill out the appropriate pages in
the User’s Guide and explain to the user how the thermo-
stat operates, what settings may be changed, and how the
time clock schedules are used.
LED Description
Six LEDs on the face allow the occupant to view the current
operating status of the thermostat.
OCCUPIED
This LED will be lit whenever the unit is operating in the
occupied mode.
HEATING
This LED will be lit when any heat output is closed.
COOLING
This LED will be lit when any cooling output is closed.
FAN
This LED will be lit when the fan output is closed.
SERVICE
This LED will be lit when the high or low discharge air
limit has been reached, when the fan interlock has indi-
cated failure, or when the filter service or service input are
closed.
PROGRAM/DATA
This LED will be lit when the thermostat is within the pro-
gramming or clock setup menus. It will blink when the unit
is being accessed by a PC.
Additional monitoring is available by continually pressing
the service key.
Limiting Occupant Access
SETPOINT ADJUSTMENT
The occupant may temporarily change the occupied heat-
ing and cooling setpoints +/- 5’F by factory default. This
setpoint change will remain until the end of the current
occupied period, at which time the program reverts to the
setpoints defined in programming. To change the range of
adjustment allowed, see programming step # 21.
OVERRIDE
The occupant has the ability to put the unit into occupied
mode by pressing the override button on the front. By facto-
ry default, the unit will remain in the occupied mode for 180
minutes. This value may be changed from 0 to 255 minutes
in programming step #22.
FAN SWITCHING
The option to allow the occupant to change the occupied
fan mode is allowed by factory default. To lock out access
to fan switching, see programming step #8.
SYSTEM SWITCHING
The option to allow the occupant to change the system
mode is allowed by factory default. To lock out access to
system switching, see programming step #6.
SETTING CLOCK & SCHEDULE
The ability to set the clock and schedule is allowed by fac-
tory default. An access code may be required as set in
programming step #39, or access may be denied altogether
using dipswitches described in the setup section.
Rev. 0313
SU P E R S T AT
TM
www.tcsbasys.com
C3656_REV5