TCS Basys Controls SZ1022N User manual

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2800 LAURA LANE • MIDDLETON, WI 53562 • [phone] • FAX [phone] • www.tcsbasys.com
1
R
SZ1022N/SZ1024N
Conventional Multistage
Heating & Cooling/Heat Pump
Thermostats
Product Manual
Description
The SZ1022N and SZ1024N are microprocessor-based
programmable thermostats designed for conventional
multistage heating-and-cooling and heat pump applications,
respectively. Both the SZ1022N and SZ1024N feature a 7-day
time clock.
Features
zStand-alone or network operation
zDischarge air sensor input with high and low limits
zThe SZ1022N offers up to three stages heating and two
stages cooling, or two stages heating and three stages
cooling, while the SZ1024N offers up to two compressor
and two auxiliary heat stages
zAdjustable delay on powerup for soft starts
zP+I control option
zSmart Recovery
zNo backup battery required
zBuilt-in HVAC equipment protection
z32 character LCD display
zSix LEDs for status monitoring
zRemote room sensing capability
zUser setpoint adjustment limits
zLocal and remote override capability
zSystem and fan switching with access lockouts
zAuxiliary time clock output (economizers)
zFan interlock safety option
zFilter service input and indication
zEquipment monitoring inputs and indication
zExternal time clock input
zEnergy management input for setpoint shift.
zAccess to programming or schedule may be locked out or
limited with the use of an access code
zFahrenheit or Celsius temperature display
Contents
Description...............................................................................1
Features....................................................................................1
Mounting..................................................................................1
Wiring.......................................................................................2
N2 Bus Connections ................................................................2
Setup.........................................................................................3
Programming............................................................................4
Setting Clock and Schedule.....................................................7
Operation..................................................................................8
Checkout and Troubleshooting................................................9
LED Description ....................................................................11
Limiting Occupant Access.....................................................12
User’s Guide ..........................................................................12
N2 Point Mapping Table (SZ1022N).....................................13
N2 Point Mapping Table (SZ1024N).....................................16
Mounting
The SZ1022N and SZ1024N are designed for wall mounting
using two #6 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 sources, open doors
and windows, or unventilated locations.
If using a remote room sensor, it should be mounted in the
manner described above. The thermostat may be mounted in
an area which is accessible for adjusting its settings.
Communicating Thermostats
Version 1.2

RW1W2Y1Y2 Time Clock
Output
Packaged Unit/Heat Pump Terminations
1For communication wiring, use
twisted, shielded 18 AWG.
Must be run separately
2Dry momentary contact.
Must not be powered.
324 VAC transformer. See
powering instructions.
4Dry contact. Must not be powered.
1
34 4
G
4
5Sensor input wiring 18 AWG,
twisted, shielded pair.
5 5
Zone/Return
Air Temp Discharge Air Temp
When multiple TCS 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.
N2 Bus
6Up to nominal 28 VAC from
equipment transformer .
6
2
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2800 LAURA LANE • MIDDLETON, WI 53562 • [phone] • FAX [phone] • www.tcsbasys.com
2
Wiring
The SZ1022N and SZ1024N use standard terminal
designations for wiring. See diagram below.
REMOTE SENSOR WIRING
Use 18 AWG shielded twisted-pair grounded at the sensor
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 SZ1022N or SZ1024N accept two remote sensors.
Consult the TS Series Temperature Sensor Submittal Data
sheet for a complete 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.
POWERING THE SZ1022N AND SZ1024N
The SZ1022N and SZ1024N are powered from 24 VAC +/-
20%.
Caution: Do not connect to 120 VAC.
If wiring for communications, dedicated power must be used
to power the SZ1022N and SZ1024N. Several “S” Series
thermostats may be powered from the same transformer,
provided that the transformer has sufficient power. (SZ1020
Series thermostats require 8 VA @ 24 VAC.)
When the SZ1022N or SZ1024N are used as stand-alone
thermostats 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.

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2800 LAURA LANE • MIDDLETON, WI 53562 • [phone] • FAX [phone] • www.tcsbasys.com
3
Setup
Note: If using remote sensor(s), the calibration may need to
be adjusted. See “Checkout & Troubleshooting” section.
SENSOR SELECTION
The dipswitches in the cover (shown above connected with
ribbon cable) as well as the program must be set when using
remote room and/or discharge. Use the following guide to
determine the dipswitch settings for your application.
Using built-in room sensor only.
(This is the default setting.)
Using built-in room sensor with
discharge air sensor.
Using remote room sensor only.
Using remote room sensor with
discharge air sensor.
1 2 3 4 5
1 2 3 4 5
KEYPAD ACCESS
The dipswitches in the cover (shown above connected with
ribbon cable) 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.
Otherwise, user access may 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 sensors are reading correctly (and program 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 to prevent tampering.

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Programming
The SZ1022N and SZ1024N may be programmed through the
display and keypad, or with a PC.
If programming with a PC, the following must be set through
the keypad prior to programming:
zAddress (step #3)
zTemperature scale (step #4)
For more information on programming through the PC,
consult your 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 dipswitches, or an access code
may be required.
fan
Occupied
Heating
Cooling
Fan
Service
Program/
COOLER
WARMER Data
switch
system
switch
program
setup
clock
setup override
service
status
program
setup
program
setup
SET ADDRESS:
000
2. ENTER ACCESS
000
1.
CODE
MON
72F
12:00 AM
program
setup
3.
program
setup
program
setup
program
setup
program
setup
program
setup
SET UNOCCUPIED
FAN MODE:
9.
8. SET OCCUPIED FAN
MODE:
USER ACCESS TO
FAN MODE?
7.
SET SYSTEM
6.
MODE:
USER ACCESS TO
5.
SYSTEM MODE?
TEMPS SHOWN IN:
4.
FAHRENHEIT
program
setup
YES
AUTO
YES
ON
AUTO
program
setup
program
setup
12. UNOCCUPIED HEAT
SETPOINT:
11.
60F
program
setup
10. DISABLE AUTO FAN
DELAYS: NO
OCCUPIED HEAT
SETPOINT: 68F
Main Monitoring Screen. Press the
program setup button to access the
following screens.
Access Code Entry Screen. Will
appear if access code is required for
programming. Use 248 as the default. If
the wrong code is entered, it will revert to
the previous screen.
Controller Address Screen. If using a
PC to access the SZ1022N or SZ1024N,
set a unique address from 1 to 255. All
controllers on a network must have a
unique communications address.
Display Type Screen. Choose between
FAHRENHEIT and CELSIUS for
temperature indication.
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, all
outputs are off. (A fifth mode,
EMERGENCY HEAT, is used on the
SZ1024N.)
Fan Access Screen. Choose whether or
not to enable the user’s access to the
fan switch to set the occupied fan mode.
Occupied Fan Mode Screen. Choose
between ON (continuous), COOL (gas
heat or no heat), or AUTO for your fan
run times during the occupied modes.
(COOL mode not available on the
SZ1024N.)
Unoccupied Fan Mode Screen. Choose
from AUTO or COOL for your fan run
times in the unoccupied mode. (COOL
mode not available on the SZ1024N.)
Auto Fan Delay Screen. Choose NO
for normal operation. Choose YES to
have the fan and heating or cooling go
on and off at the same time.
Occupied Heat Setpoint Screen. Set
the occupied heat setpoint.
Unoccupied Heat Setpoint Screen. Set
the unoccupied heat setpoint.

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setup
COOL STAGE 2
2F
DIFF:
27a. COOL STAGE 2
1F
DIFF:
COOL STAGE 2
OFFSET: 2F
26a. COOL STAGE 2
OFFSET: 1F
COOL STAGE 1
2F
DIFF:
COOL STAGE 1
1F
DIFF:
25a.
COOL STAGE 1
OFFSET: 0F
24a. COOL STAGE 1
OFFSET: 0F
23a. HEAT STAGE 2
2F
DIFF:
HEAT STAGE 2
1F
DIFF:
HEAT STAGE 2
OFFSET: 2F
HEAT STAGE 2
OFFSET: 1F
22a.
Go to
# 30
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ENABLE SECOND
STAGE COMP?
17b.
YES
COOL STAGE 3
29a.
DIFF: 2F
COOL STAGE 3
OFFSET:
28a.
2F
Occupied Cool Setpoint Screen. Set
the occupied cool setpoint.
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
SZ1022N or SZ1024N will maintain
occupied setpoints when overridden.
Second Stage Heat Screen. Choose
whether the thermostat will control a
second stage of heat. (Select NO if not
using a second stage of heat.)
Second Stage Cool Screen. Choose
whether the thermostat will control a
second stage of cooling. (Select NO if not
using a second stage of cooling.)
Third Stage Choice Screen. Choose
from HEAT or COOL for your third stage
or DISABLE. (Select DISABLE if not
using a third stage of heat or cool.)
Heat Stage 1 Offset Screen. Enter an
offset value for heat stage 1. First stage
is normally 0 offset.
Heat Stage 1 Differential Screen. Enter
a differential value for heat stage 1.
Heat Stage 2 Offset Screen. Enter an
offset value for heat stage 2. This
screen only appears if stage 2 is
enabled.
Heat Stage 2 Differential Screen.
Enter a differential value for heat stage
2. This screen only appears if stage 2 is
enabled.
Cool Stage 1 Offset Screen. Enter an
offset value for cool stage 1. First stage
is normally 0 offset.
Cool Stage 1 Differential Screen.
Enter a differential value for cool
stage 1.
Cool Stage 2 Offset Screen. Enter an
offset value for cool stage 2. This screen
only appears if stage 2 is enabled.
Cool Stage 2 Differential Screen.
Enter a differential value for cool stage
2. This screen only appears if stage 2 is
enabled.
Stage 3 Offset Screen. Enter an offset
value for stage 3. This screen only
appears if stage 3 is enabled.
Stage 3 Differential Screen. Enter a
differential value for stage 3. This screen
only appears if stage 3 is enabled.
Second Stage Compressor Screen.
Choose whether the thermostat will
control a second stage compressor.
(Select NO if not using a second stage
compressor.)
program
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21a. HEAT STAGE 1
2F
DIFF:
HEAT STAGE 1
1F
DIFF:
20a. HEAT STAGE 1
OFFSET: 0F
HEAT STAGE 1
OFFSET: 0F
19a. ENABLE THIRD
COOL
STAGE AS:
ENABLE THIRD
COOL
STAGE AS:
18a. ENABLE SECOND
STAGE COOL?
ENABLE SECOND
STAGE HEAT?
17a.
SET OVERRIDE
16.
TIME: 180 MINUTES
LIMIT SETPOINT
5F
ADJUST +/-:
15.
SETPOINT:
UNOCCUPIED COOL
14.
13. OCCUPIED COOL
SETPOINT:
program
setup
Conventional
H/C
HeatPump
Go to 17b.
72F
80F
YES
YES

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DI2 USED FOR:
SERVICE
DI1 USED FOR:
FAN PROVING
DISCHARGE AIR
HIGH LIMIT:
36.
35.
34.
DISCHARGE AIR
33.
LOW LIMIT:
32. ENABLE DISCHARGE
AIR SENSOR?
31. TIMECLOCK OUTPUT
OCCUPIED=CLOSED
program
setup
30. SET CONTROL
MODE:
REVERSING VALVE
OUTPUT
28b.
program
setup
27b. COOL STAGE 2
2F
DIFF:
AUX HEAT STAGE 2
2F
DIFF:
120F
45F
YES
P+I
NO
program
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HEAT STAGE 1
2F
DIFF:
COMP STAGE 1
1F
21b.
DIFF:
HEAT STAGE 1
OFFSET: 0F
COMP STAGE 1
20b.
OFFSET: 0F
ENABLE THIRD
COOL
STAGE AS:
ENABLE STAGE 2
YES
AUX HEAT?
19b.
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COOL STAGE 2
OFFSET: 2F
26b. AUX HEAT STAGE 2
OFFSET: 4F
COOL STAGE 1
2F
DIFF:
25b. AUX HEAT STAGE 1
1F
DIFF:
COOL STAGE 1
OFFSET: 0F
24b. AUX HEAT STAGE 1
OFFSET: 3F
23b. HEAT STAGE 2
2F
DIFF:
COMP STAGE 2
1F
DIFF:
HEAT STAGE 2
OFFSET: 2F
22b. COMP STAGE 2
OFFSET: 1F
program
setup
18b. ENABLE STAGE 1
AUX HEAT? YES
First Stage Auxiliary Heat Screen.
Choose whether the thermostat will
control a first stage of auxiliary heat.
(Select NO if not using a first stage of
auxiliary heat.)
Second Stage Auxiliary Heat Screen.
Choose whether the thermostat will
control a second stage of auxiliary heat.
(Select NO if not using a second stage of
auxiliary heat.)
Compressor Stage 1 Offset Screen.
Enter an offset value for compressor
stage 1. First stage is normally 0 offset.
Compressor Stage 1 Differential
Screen. Enter a differential value for
compressor stage 1.
Compressor Stage 2 Offset Screen.
Enter an offset value for compressor
stage 2. This screen only appears if
compressor 2 is enabled.
Compressor Stage 2 Differential
Screen. Enter a differential value for
compressor stage 2. This screen only
appears if compressor stage 2 is
enabled.
Auxiliary Heat Stage 1 Offset Screen.
Enter an offset value for cool stage 1.
This screen only appears if auxiliary heat
stage 1 is enabled.
Auxiliary Heat Stage 1 Differential
Screen. Enter a differential value for
auxiliary heat stage 1. This screen only
appears if auxiliary heat stage 1 is
enabled.
Auxiliary Heat Stage 2 Offset Screen.
Enter an offset value for auxiliary heat
stage 2. This screen only appears if
auxiliary heat stage 2 is enabled.
Auxiliary Heat Stage 2 Differential
Screen. Enter a differential value for
auxiliary heat stage 2. This screen only
appears if auxiliary heat stage 2 is
enabled.
Reversing Valve Output Screen. Enter
whether the reversing valve output will be
open (NO) or closed (NC) for cooling.
Control Mode Screen. Enter whether
you want to control by temperature only
(P) or add a time factor (P+I).
Time Clock Output Screen. Choose
whether the auxiliary output will be OPEN
during occupied periods (and closed
during unoccupied periods) or CLOSED
during occupied periods (and open during
unoccupied periods).
Discharge Air Sensor 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.
DI1 Choice Screen. Choose DI1 as FAN
PROVING or a MONITOR point. Select
MONITOR if unused.
DI2 Choice Screen. Choose DI2 as
SERVICE, COOL LOCKOUT, or
MONITOR. Select MONITOR if unused.

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MON
72F
12:00 AM
SET ACCESS
CODE: 000
43.
REQUIRE CODE FOR
YES
CLOCK/SCHED?
42.
REQUIRE CODE FOR
PROGRAMMING? YES
41.
ENABLE SMART
YES
RECOVERY?
ENABLE SMART
YES
RECOVERY?
40.
DELAY ON POWERUP
60 SECONDS
DELAY ON POWERUP
60 SECONDS
39.
DI3 USED FOR:
FILTER SERVICE
DI3 USED FOR:
FILTER SERVICE
38.
DI3 USED FOR:
FILTER SERVICE
SET DI2 SETPOINT
SHIFT:
37.
0F
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.
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 an 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. The default is 248.
Main Monitoring Screen.
Setting Clock and Schedule
The SZ1022N and SZ1024N clock and schedule may be set
through the display and keypad, or with a PC. For more
information on programming through the PC, consult the
software documentation.
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
clock
setup
1. ENTER ACCESS
000
CODE
SET TIME & DAY:
MON
12:00 AM
2. override
clock
setup
clock
setup
3. SET OCCUPIED
TIMES MONDAY:
5. SET OCCUPIED
TIMES TUESDAY:
The following screens are repeated for
Wednesday, Thursday, Friday, Saturday
and Sunday
MON
72F
12:00 AM
clock
setup
A:08:00 TO 12:00
4.
B:13:00 TO 17:00
override
clock
setup
clock
setup
clock
setup
7. A:08:00 TO 12:00
B:13:00 TO 17:00
override
6. COPY MON FOR
TUE? YES
Main Monitoring Screen. Press the
clock setup button to access the
following screens.
Access Code Entry Screen. May
appear if access code is required for
setting clock and schedules. Use 248
as the default. If the wrong code is
entered, it will revert to the previous
screen.
Time and Day Screen. Set the hour,
minutes, AM or PM, and day of the
week.
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.
Schedule Announcement Screen.
Announces the next screen.
Copy Schedule Screen. Indicate
whether or not to use the same
schedule that was used for the
previous day. If the same schedule is
used, the following screen is not
displayed.
Occupied Times Screen. Set hours
or minutes of start and end times for
up to two occupied periods.
Main Monitoring Screen.

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Operation
UNOCCUPIED SETBACK
The SZ1022N and SZ1024N operate in either an occupied or
unoccupied 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,
whereas when DI3 is closed, the unit is in the occupied mode.
The Smart Recovery function is disabled when DI3 is used
for external time clock.
OVERRIDE
A timed override is available on the face or through
momentary contacts. The amount of time the unit will be
overridden is set from 0 to 255 minutes in the programming.
This override only activates when the thermostat is operating
in the unoccupied mode. Both the software and the service
button allows you to view the time remaining in the override
mode. If the occupant desires to return the thermostat to
unoccupied operation before that time interval is up, they may
press the button on the face or the momentary contact 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.
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 occupancy or light sensor, set DI3 to override
and set it up so that the contact 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 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 time clock, and use the timed override button to
put the unit in occupied mode.
To make the unit always occupied, set DI3 to time clock and
short the DI3 terminal to ground.
DISCHARGE AIR TEMPERATURE SENSING
The SZ1022N and SZ1024N accept a remote discharge air
sensor (TS1002) for monitoring purposes. (See setup
instructions for dipswitch placement for this option.)
Choose YES in programming screen #32 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 is still monitored.
When the function is enabled, a HIGH LIMIT and LOW
LIMIT are entered in steps #33 and #34. 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 to 150 °F (-17.8 to 65.6 °C).
FAN PROVING
The SZ1022N and SZ1024N allow DI1 to be set for fan
proving to protect equipment on fan failure. To utilize this,
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 system 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 SZ1022N and SZ1024N allow 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 number 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.

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9
STAGE OUTPUT PARAMETERS
The SZ1022N will control up to two stages each of heating
and cooling, with a fifth stage that may be assigned as a third
stage for either. The SZ1024N will control up to two
compressor stages, and up to two stages of auxiliary heat. It is
recommended that all unused stages be disabled.
For each stage, you may specify an offset and a differential
value. This allows you to adjust the operation of the
thermostat to fit your equipment to the building load. The
offset value is the amount away from the setpoint a stage will
turn off. By assigning 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.
The SZ1022N and SZ1024N also have 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 useful 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.
DI2 COOL LOCKOUT
DI2 may be set as cool lockout for operation with
economizers. An outdoor temperature switch may be wired in
such that when DI2 is closed, the second and third stages of
cooling are disabled.
SMART RECOVERY
“Smart Recovery” may be enabled to insure occupant comfort
while saving money. It takes the building load into
Heat
Setpoint
Cool
Setpoint
ON
ON
ON
OFF
OFF
OFF
OFF
Differential
Differential
Offset
Offset
Differential
Differential
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.
AUXILIARY OUTPUT
An auxiliary relay output is available to output a signal based
on the occupancy status. It is commonly used with an
economizer minimum position control, or to signal an outdoor
air damper to open in occupied times in lieu of an economizer.
It may also be used for lighting or hot water heaters. Keep in
mind that although it is an isolated relay (separate common
terminal), it is rated at 2A@24 VAC. For loads that exceed this,
use an external relay. It may be set to be open (N.O.) or closed
(N.C.) when the thermostat is operating in the occupied mode,
and will be the opposite during the unoccupied mode.
BUILT-IN DELAYS
The SZ1022N and SZ1024N have delays built into the
programming sequences to protect equipment. The fan has a
minimum on and off time of 30 seconds. When the fan is in
AUTO or COOL mode, it will come on 30 seconds before the
heating or cooling stages are allowed to sequence on, and
remain on for 30 seconds after the heating or cooling 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 POWERUP
The SZ1022N and SZ1024N have an adjustable delay on
powerup. 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 seconds, where
no outputs are allowed to turn on for that length of time on
powerup. Setting each unit to a different delay allows you to
soft start your system, and thus prevent this peak.
Checkout & Troubleshooting
CHECKOUT
Note: The fan has a minimum on and off time of 30 seconds.
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 momentary
screen with the model number , and then the main
monitoring screen with the time, day, and current
temperature.

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3.Press the PROGRAM SETUP button until you reach the
screen # 15 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 setpoint is
one degree less than the current temperature. The heating
stage(s) will sequence off. The fan will turn off 30 seconds
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 30 seconds
after the last cooling stage.
10. Go back to programming step #15 and set the setpoint
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 settings.
11. IF using remote sensors, verify that the reading is correct.
If not, see Wrong Temperature Display in
“Troubleshooting” section.
TROUBLESHOOTING
No Display
Check for 24 VAC on terminals “+24” and “-24”. Check the
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 and system
switch modes, 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 whenever the
cooling LED is on. If heating or cooling should be on but the
heating or cooling LED is off, check the fan and system
switch modes. Also, check the heating and cooling setpoints,
offsets and differentials, and the room temperature to be sure
heating or cooling should be on. If using outdoor air heating
and cooling lockouts, or discharge air high and low limits,
check their values to be sure heating or cooling is allowed. If
heating or cooling is off, but the corresponding LED is on,
check the wiring. Short terminals “R” to “W1”, “W2”, “Y1”,
“Y2”, or “B/O” and see if the heating or cooling comes on.
This is a check for a mechanical relay failure.
Wrong Temperature Display
If any of the temperatures is reading slightly high or low,
there are two adjustment pots located in the cover to adjust
them. “T1” is for the room temperature and “T2” is for the
discharge air temperature. If the temperature is at a minimum
or maximum reading, check the sensor dipswitch positions.
(See setup instructions.) Check for wiring problems (opens or
shorts). A remote 1000 :sensor should read 1080 to 1090 :
at room temperature. The built-in sensor should read 108 to
109 :at room temperature.
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 accessed by pressing the service status button will
display why the light is on.
Outputs Will Not Shut Off
First check the room temperature and the setpoints and
determine whether the output should be on. There are delays
and minimum on and off times for the fan and heating and
cooling 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 SCREENS
Continually pressing the service status button allows more
extensive monitoring. The screens are shown at right.
*SZ1022N*
V 1.2

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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 indicated
failure, or when the filter service or service input are closed.
PROGRAM/DATA
This LED will be lit when the thermostat is within the
programming 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.
MON
72F12:00 AM
DISCHARGE AIR
55F
SERVICE STATUS
OK
TEMP
1.
2.
3.
service
status
service
status
service
status
service
status
fan
Occupied
Heating
Cooling
Fan
Service
Program/
COOLER
WARMER Data
switch service status
system
switch
program
setup
clock
setup override
OVERRIDE
178 MINUTES
Conventional H/C
continue
Heat Pump
Go to 4b.
ON
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 following:
CHECK FILTER, CHECK FAN, DISCHARGE
HIGH, DISCHARGE LOW, or CHECK DI2.
Discharge Air Temperature Screen. Shows
discharge air temperature if sensor is used.
Override Status Screen. Shows whether
the override is active and if so, how many
minutes remaining.
HEAT STAGE 1 OFF
COOL STAGE 1 ON
COOL STAGE 3 OFF
4a.
5a.
6a.
HEAT STAGE 2 OFF
COOL STAGE 2 OFF
FAN STATUS OK
service
status
service
status
7. DI2 SERVICE OFF
FILTER OK
MON
72F12:00 AM
service
status
service
status
service
status
COMP STAGE 1 ON
AUX HEAT 1 ON
REV VALVE OPEN
4b.
5b.
6b.
COMP STAGE 2 OFF
AUX HEAT 2 OFF
FAN STATUS OK
service
status
service
status
Heat Stages Status Screen. Shows
the status of the first and second
stages of heating.
Cool Stages Status Screen. Shows
the status of the first and second
stages of cooling.
Third Stage and DI1 Status Screen.
Shows the status of the third stage
and the status of the fan interlock if
DI1 is set for fan interlock.
Compressor Stages Status Screen.
Shows the status of the first and
second stage compressors.
Auxiliary Heat Stages Status
Screen. Shows the status of the first
and second stages auxiliary heat.
Reversing Valve and DI1 Status
Screen. Shows the position of the
reversing valve as either heat or cool
and the status of the fan interlock or
DI1.
DI2 and DI3 Status Screen. Shows
the cool lockout into DI2 or DI2 status
and filter status or DI3 status.
Main Monitoring Screen.

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12
Limiting Occupant Access
SETPOINT ADJUSTMENT
The occupant may temporarily change the occupied heating
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 #15.
OVERRIDE
The occupant has the ability to put the unit into occupied
mode by pressing the override button on the front. By factory
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 #16.
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 #7.
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 #5.
SETTING CLOCK & SCHEDULE
The ability to set the clock and schedule is allowed by factory
default. An access code may be required as set in
programming step #42, or access may be denied altogether
using dipswitches described in the setup section.
PROGRAMMING
The ability to program control parameters is allowed by
factory default. An access code may be required as set in
programming step # 41, or access may be denied altogether
using dipswitches described in the setup section.
POINT MAPPING TABLES
SZ1022N.............................Pages 13 -15
SZ1024N.............................Pages 16 -18
TCS/Basys Controls
Technical Support
800-288-9383
User’s Guide
Inside the hinged door of the thermostat is the SuperstatTM
User’s Guide. This guide is designed to assist the installer in
explaining to the end user how to operate their new
thermostat, as well as serve as a handy future reference for
the end user.
We recommend that the
installer fill out pages 1,
5, 7 and 8 (where
applicable) and explain to
the user how the
thermostat operates, what
settings may be changed,
and how the time clock
schedules are used.
SUPERSTAT
TM

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13
Pointmap Table for SZ1022N (See page 16 for Pointmap Table for SZ1024N)
NPT NPA UNITS POINT DESCRIPTION RANGE/VALUE ADDITIONAL NOTES
ADI 1 # DI2 control mode 0=cool lockout See Setup (page 8).
1=monitor
2=service
ADI 2 # DI3 control mode 0=filter service See Setup (page 7).
1=external override
2=external time clock
ADI 3 # Occupied Fan mode 0=on, 1=cool, 2=auto Fan Switch button on keypad.
ADI 4 # System mode 0=off,1=auto,2=heat System Switch button on keypad.
3=cool
ADI 5 Day Internal time clock day 0-6, mon to sunday Day of Week.
ADI 6 Hours Internal time clock hours 0-23 0-11 (AM), 12-23 (PM).
ADI 7 DegF (C) Setpoint adjust limit from keypad 0-50 (0-28) Limits keypad adjustment of occupied
heating and cooling setpoints. See note 5.
ADI 8 DegF Differential for cool stage 1 0-50
ADI 9 DegF Offset for cool stage 1 0-50
ADI 10 DegF Differential for cool stage 2 0-50
ADI 11 DegF Offset for cool stage 2 0-50
ADI 12 DegF Differential for heat stage 1 0-50
ADI 13 DegF Offset for heat stage 1 0-50
ADI 14 DegF Differential for heat stage 2 0-50
ADI 15 DegF Offset for heat stage 2 0-50
ADI 16 DegF Differential for stage 3 0-50 Stage 3 can do either Heating or Cooling.
ADI 17 DegF Offset for stage 3 0-50
ADI 18 DegF Setpoint shift value 0-50 When DI2 is selected Monitor, this is
number of degrees that the occupied
cooling setpoint is shifted up and the
heating setpoint is shifted down.
ADI 19 Seconds Internal time clock second 0-59
ADI 20 Minutes Internal time clock minute 0-59
ADI 21 DegF (C) Occupied heating setpoint 40-90 (4-32) Occupied heating setpoint must be less
than occupied cooling setpoint.
ADI 22 DegF (C) Unoccupied heating setpoint 40-90 (4-32) Unoccupied heating setpoint must be
less than unoccupied cooling setpoint.
ADI 23 DegF (C) Occupied cooling setpoint 40-90 (4-32)
ADI 24 DegF (C) Unoccupied cooling setpoint 40-90 (4-32)
ADI 25 DegF (C) Room temperature 40-90 (4-32) Read only. See Note 5.
ADI 26 DegF (C) Discharge air low limit 0-150 (-18-65) Discharge air high limit must be greater
than discharge air low limit.
ADI 27 DegF (C) Discharge air high limit 0-150 (-18-65)
ADI 28 DegF (C) Discharge air temperature 0-150 (-18-65) Read only.
ADI 29 Minutes Override period 0-255 Unoccupied override time allowed.
ADI 30 Seconds Power on delay time 0-255 Time before control begins on powerup.
ADI 31 Minutes Remaining override time 0-255 Read Only. Time remaining before the
override period expires.
ADI 32 DegF (C) Current user setpoint adjust -50-50, (28-28) Read Only. + or - amount the occupied
setpoint has been adjusted from actual
settings. (See Note 5.)
ADI 33 Minutes Monday Occupied start time 0-1440 There are two occupied and two un-
for schedule A occupied time periods allowed per day.
ADI 34 Minutes Monday Occupied end time 0-1440
for schedule A All times are measured in minutes from
ADI 35 Minutes Monday Occupied start time 0-1440 midnight.
for schedule B
ADI 36 Minutes Monday Occupied end time 0-1440
for schedule B
ADI 37 Tuesday 0-1440
ADI 38 Tuesday 0-1440
ADI 39 Tuesday 0-1440

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Pointmap Table for SZ1022N (continued)
NPT NPA UNITS POINT DESCRIPTION RANGE/VALUE ADDITIONAL NOTES
ADI 40 Tuesday 0-1440
ADI 41 Wednesday 0-1440
ADI 42 Wednesday 0-1440
ADI 43 Wednesday 0-1440
ADI 44 Wednesday 0-1440
ADI 45 Thursday 0-1440
ADI 46 Thursday 0-1440
ADI 47 Thursday 0-1440
ADI 48 Thursday 0-1440
ADI 49 Friday 0-1440
ADI 50 Friday 0-1440
ADI 51 Friday 0-1440
ADI 52 Friday 0-1440
ADI 53 Saturday 0-1440
ADI 54 Saturday 0-1440
ADI 55 Saturday 0-1440
ADI 56 Saturday 0-1440
ADI 57 Sunday 0-1440
ADI 58 Sunday 0-1440
ADI 59 Sunday 0-1440
ADI 60 Sunday 0-1440
BD 1 DI1 control mode 0=fan proving, See “Operation” (page 8).
1=Monitor
BD 2 Unocc fan mode 0=cool, 1= auto Not accessible with Fan Switch button.
BD 3 Enable occupied fan switch 0 = No, 1=Yes Enables Fan Switch button.
BD 4 Enable system switch 0 = No, 1=Yes Enables System Switch button.
BD 5 Use of discharge air sensor 0 = No, 1=Yes Always monitored, enables discharge
air function.
BD 6 Enable smart recovery routine 0 = No, 1=Yes 4° per hour setpoint ramp prior to oc-
cupancy for both heating and cooling.
BD 7 Require access code 0 = No, 1=Yes Programming access from keypad.
for programming?
BD 8 Require access code 0 = No, 1=Yes Clock/Schedule access from keypad.
for clock/schedule?
BD 9 Enable cool stage 2 0=disable, 1=enable Disable unused stages (recommended).
BD 10 Enable heat stage 2 0=disable, 1=enable
BD 11 Enable stage 3 0=disable, 1=enable
BD 12 Stage 3 action 0=cool, 1=heat Stage 3 can be either heating or cooling.
BD 13 Time clock relay output 0=Normally Open State of relay output during occupied
1=Normally Closed period.
BD 14 Control mode 0=Proportional Stages turned on and off using offsets
and differentials only.
1=Prop. + Integral Stages turned on and off using offsets
and differentials + a time factor.
BD 15 DI1 source 0=local contact Local means read by or controlled by
Thermostat.
1=remote request Remote means the state of the input or
output is controlled only by computer.
BD 16 DI2 source 0=local contact
1=remote request
BD 17 DI3 source 0=local contact
1=remote request
BD 18 Override function source 0=local keypad
1=remote request
BD 19 Fan relay source 0=local mode
1=remote request
BD 20 Remote DI1 request 0=off, 1=on When selected to be Remote, turns
input or output on and off.

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15
Pointmap Table for SZ1022N (continued)
NPT NPA UNITS POINT DESCRIPTION RANGE/VALUE ADDITIONAL NOTES
BD 21 Remote DI2 request 0=off, 1=on
BD 22 Remote DI3 request 0=off, 1=on
BD 23 Remote override request 0=off, 1=on This is a permanent override.
BD 24 Remote Fan request 0=off, 1=on
BD 25 Heat stage 1 relay status 0=off, 1=on Read only.
BD 26 Heat stage 2 relay status 0=off, 1=on Read Only
BD 27 Cool stage 1 relay status 0=off, 1=on Read only.
BD 28 Cool stage 2 relay status 0=off, 1=on Read only.
BD 29 Fan relay status 0=off, 1=on Read only.
BD 30 Stage 3 relay status 0=off, 1=on Read only.
BD 31 Time clock relay status 0=off, 1=on Read only.
BD 32 DI1 status 0=off, 1=on Read only.
BD 33 DI2 status 0=off, 1=on Read only.
BD 34 DI3 status 0=off, 1=on Read only.
BD 35 Override status 0=off, 1=on Read only.
BD 36 Device’s occupied status 0=Occupied Read only.
1=Unoccupied
BD 37 Service status 0=OK, 1= fail Read only. See Note 1.
BD 38 Fan interlock status 0= OK, Read only. DI1 Fan Proving.
1= Fan interlock fail
BD 39 Filter service status 0=OK, Read only. DI3 Filter Status.
1=Check filter
BD 40 Discharge air high limit 0=OK, Read only. Discharge air function.
1= Above high limit
BD 41 Discharge air low limit 0=OK, Read only. Discharge air function.
1= Below low limit
BD 42 DI2 service status 0=OK, Read only. DI2 Service.
1= Check DI2
NOTE 1: The Service status point represents general Check status. If this is point is 1, the user can find out the actual failing
condition by polling point 38 to 42. If this point is 0, points 38 to 42 will also be 0.
NOTE 2: All of the ADI and BD points support the override function. The value overridden will be stored permanently, so the
status attribute will never have any override active status. Because none of these points support the override release
function, the controller will acknowledge the override release function but never release the value. The controller will
respond with NAK error N10 if the value for the override command is outside the limits for that point. Points that are
Read Only can not be overridden. The controller will acknowledge the override command, but the actual change will
never happen.
NOTE 3: All of the points in this map can be adjusted through the keypad except Read Only points and BD points 15 through 24.
In the case of loss of communications for 15 minutes (i.e., if the controller is not addressed for 15 minutes), the
controller will revert BD points 15 through 24 to zero value (make them all local requests).
NOTE 4: Communications are disabled when programming mode or clock/schedule mode is entered via the keypad. Entering
programming mode via the keypad can be disabled.
NOTE 5: If the temperature in programming step #4 is set to be displayed in degrees Fahrenheit, the values of ADI 7, ADI 21
through ADI 28 and ADI 32 will be Fahrenheit values. If the temperature is set to be displayed in degrees Celsius,
these ADI values will be in Celsius.

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16
Pointmap Table for SZ1024N (See page 13 for Pointmap Table for SZ1022N)
NPT NPA UNITS POINT DESCRIPTION RANGE/VALUE ADDITIONAL NOTES
ADI 1 # DI2 control mode 0=cool lockout See "Setup" (page 8).
1=monitor
2=service
ADI 2 # DI3 control mode 0=filter service See "Setup" (page 7).
1=external override
2=external timeclock
ADI 3 # System mode 0=off,1=auto, "System Switch" button on keypad.
3=cool, 2=heat
4=emergency heat
ADI 4 Day Internal time clock "day" 0-6, mon to sunday Day of Week.
ADI 5 Hours Internal time clock "hours" 0-23 0-11 (AM), 12-23 (PM).
ADI 6 DegF (C) Setpoint adjust limit from keypad 0-50 (0-28) Limits keypad adjustment of occupied
heating and cooling setpoints. (See Note 5.)
ADI 7 DegF Differential for compressor 1 0-50
ADI 8 DegF Offset for compressor 1 0-50
ADI 9 DegF Differential for compressor 2 0-50
ADI 10 DegF Offset for compressor 2 0-50
ADI 11 DegF Diff. for auxiliary heat 1 0-50
ADI 12 DegF Offset for auxiliary heat 1 0-50
ADI 13 DegF Diff. for auxiliary heat 2 0-50
ADI 14 DegF Offset for auxiliary heat 2 0-50
ADI 15 DegF Setpoint shift value 0-50 When DI2 is selected "Monitor", this is
number of degrees that the occupied
cooling setpoint is shifted up and the
heating setpoint is shifted down.
ADI 16 Seconds Internal time clock "second" 0-59
ADI 17 Minutes Internal time clock "minute" 0-59
ADI 18 DegF (C) Occupied heating setpoint 40-90 (4-32) Occupied heating setpoint must be less
than occupied cooling setpoint.
ADI 19 DegF (C) Unoccupied heating setpoint 40-90 (4-32) Unoccupied heating setpoint must be
less than unoccupied cooling setpoint.
ADI 20 DegF (C) Occupied cooling setpoint 40-90 (4-32)
ADI 21 DegF (C) Unoccupied cooling setpoint 40-90 (4-32)
ADI 22 DegF (C) Room temperature 40-90 (4-32) Read only. See Note 5.
ADI 23 DegF (C) Discharge air low limit 0-150 (-18-65) Discharge air high limit must be greater
than discharge air low limit.
ADI 24 DegF (C) Discharge air high limit 0-150 (-18-65)
ADI 25 DegF (C) Discharge air temperature 0-150 (-18-65) Read only.
ADI 26 Minutes Override period 0-255 Unoccupied override time allowed.
ADI 27 Seconds Power on delay time 0-255 Time before control begins on powerup.
ADI 28 Minutes Remaining override time 0-255 Read Only. Time remaining before the
override period expires.
ADI 29 DegF (C) Current user setpoint adjust -50-50 (-28-28) Read Only. + or - amount the occupied
setpoint has been adjusted from actual
settings. (See Note 5.)
ADI 30 Minutes Monday Occupied start time 0-1440 There are two occupied and two un-
for schedule A occupied time periods allowed per day.
ADI 31 Minutes Monday Occupied end time 0-1440
for schedule A All times are measured in minutes from
ADI 32 Minutes Monday Occupied start time 0-1440 midnight.
for schedule B
ADI 33 Minutes Monday Occupied end time 0-1440
for schedule B
ADI 34 Tuesday 0-1440
ADI 35 Tuesday 0-1440
ADI 36 Tuesday 0-1440
ADI 37 Tuesday 0-1440
ADI 38 Wednesday 0-1440
ADI 39 Wednesday 0-1440
ADI 40 Wednesday 0-1440

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17
Pointmap Table for SZ1024N (continued)
NPT NPA UNITS POINT DESCRIPTION RANGE/VALUE ADDITIONAL NOTES
ADI 41 Wednesday 0-1440
ADI 42 Thursday 0-1440
ADI 43 Thursday 0-1440
ADI 44 Thursday 0-1440
ADI 45 Thursday 0-1440
ADI 46 Friday 0-1440
ADI 47 Friday 0-1440
ADI 48 Friday 0-1440
ADI 49 Friday 0-1440
ADI 50 Saturday 0-1440
ADI 51 Saturday 0-1440
ADI 52 Saturday 0-1440
ADI 53 Saturday 0-1440
ADI 54 Sunday 0-1440
ADI 55 Sunday 0-1440
ADI 56 Sunday 0-1440
ADI 57 Sunday 0-1440
BD 1 DI1 control mode 0=fan proving, See "Operation" (page 8).
1=Monitor
BD 2 Occ fan mode 0=On, 1= Auto "Fan Switch" button on key pad
BD 3 Enable occupied fan switch 0 = No, 1=Yes Enables "Fan Switch" button.
BD 4 Enable system switch 0 = No, 1=Yes Enables "System Switch" button.
BD 5 Use of discharge air sensor 0 = No, 1=Yes Always monitored, enables discharge
air function.
BD 6 Enable smart recovery routine 0 = No, 1=Yes 4° per hour setpoint ramp prior to oc-
cupancy for both heating and cooling.
BD 7 Require access code 0 = No, 1=Yes Programming access from keypad.
for programming?
BD 8 Require access code 0 = No, 1=Yes Clock/Schedule access from keypad.
for clock/schedule?
BD 9 Enable compressor 2 0=disable, 1=enable Disable unused stages (recommended).
BD 10 Enable auxiliary heat 1 0=disable, 1=enable
BD 11 Enable auxiliary heat 2 0=disable, 1=enable
BD 12 Reverse valve action for cooling 0=Normally Open State of relay output during occupied
1=Normally Closed period.
BD 13 Time clock relay output 0=Normally Open State of relay output during occupied
1=Normally Closed period.
BD 14 Control mode 0=Proportional Stages turned on and off using offsets
and differentials only.
1=Prop. + Integral Stages turned on and off using offsets
and differentials + a time factor.
BD 15 DI1 source 0=local contact "Local" means read by or controlled by
Thermostat.
1=remote request "Remote" means the state of the input or
output is controlled only by computer.
BD 16 DI2 source 0=local contact
1=remote request
BD 17 DI3 source 0=local contact
1=remote request
BD 18 Override function source 0=local keypad
1=remote request
BD 19 Fan relay source 0=local mode
1=remote request
BD 20 Remote DI1 request 0=off, 1=on When selected to be "Remote", turns
input or output on and off.
BD 21 Remote DI2 request 0=off, 1=on
BD 22 Remote DI3 request 0=off, 1=on
BD 23 Remote override request 0=off, 1=on This is a permanent override.
BD 24 Remote Fan request 0=off, 1=on

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Pointmap Table for SZ1024N (continued)
NPT NPA UNITS POINT DESCRIPTION RANGE/VALUE ADDITIONAL NOTES
BD 25 Aux heat 1 relay status 0=off, 1=on Read only.
BD 26 Aux heat 2 relay status 0=off, 1=on Read Only
BD 27 Compressor 1 relay status 0=off, 1=on Read only.
BD 28 Compressor 2 relay status 0=off, 1=on Read only.
BD 29 Fan relay status 0=off, 1=on Read only.
BD 30 Reverse valve relay status 0=off, 1=on Read only.
BD 31 Timeclock relay status 0=off, 1=on Read only.
BD 32 DI1 status 0=off, 1=on Read only.
BD 33 DI2 status 0=off, 1=on Read only.
BD 34 DI3 status 0=off, 1=on Read only.
BD 35 Override status 0=off, 1=on Read only.
BD 36 Device's occupied status 0=Occupied Read only.
1=Unoccupied
BD 37 Service status 0=OK, 1= fail Read only. See Note 1.
BD 38 Fan interlock status 0= OK, 1= Fan Read only. DI1 Fan Proving.
interlock fail
BD 39 Filter service status 0=OK, 1=check Read only. DI3 Filter Status.
Filter
BD 40 Discharge air high limit 0=OK, 1= Above Read only. Discharge air function.
high limit
BD 41 Discharge air low limit 0=OK, 1= Below Read only. Discharge air function.
low limit
BD 42 DI2 service status 0=OK, 1= Check DI2 Read only. DI2 Service.
NOTE 1: The Service status point represents general Check status, if this is point is 1, then by polling point 38 to 42, the user
can find out actual failing condition. If this point is 0 then points 38 to 42 will be also 0.
NOTE 2: All of the ADI and BD points support the override function. The value overridden will be stored permanently, so the
status attribute will never have any override active status. Because none of these points support the override
release function, the controller will acknowledge the override release function but never release the value. The
controller will respond with NAK error N10 if the value for the override command is outside the limits for that point.
Points that are "Read Only" can not be overridden. The controller will acknowledge the override command, but the
actual change will never happen.
NOTE 3: All of the points in this map can be adjusted through the keypad except: “Read Only” points and BD points 15 through
24. In the case of loss of communications for 15 minutes (i.e., if the controller is not addressed for 15 minutes), the
controller will revert BD points 15 to 24 to zero value (make them all local requests).
NOTE 4: Communications are disabled when programming mode or clock/schedule mode is entered via the key pad. Entering
programming mode via the keypad can be disabled.
NOTE 5: If the temperature in programming step #4 is set to be displayed in degrees Fahrenheit, the values of ADI 6, ADI 18
through ADI 25 and ADI 29 will be Fahrenheit values. If the temperature is set to be displayed in degrees Celsius,
these ADI values will be in Celsius.

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2800 LAURA LANE • MIDDLETON, WI 53562 • [phone] • FAX [phone] • www.tcsbasys.com
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Rev. 0305