TCS Basys Controls SZ1031, SZ1022, SZ1035 User Manual

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1

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Communicating Thermostats

SZ1009/SZ1022/
SZ1031/SZ1035

Conventional Heating &
Cooling Thermostats

Product Manual

Description

The SZ1009, SZ1022, SZ1031 and SZ1035 are microproces­sor-based programmable thermostats designed for conventional
heating and cooling applications. The SZ1009, and SZ1022
feature a 7-day time clock, while the SZ1031 and SZ1035 fea­ture a 365-day time clock.

Features

z Stand-alone or network operation
z Adjustable delay on powerup for soft starts
z P+I control option
z Smart Recovery
z No battery backup required
z Built-in HVAC equipment protection
z 32 character LCD display
z 6 status LEDs
z Remote room sensing capability
z User setpoint adjustment limits
z Local and remote override capability
z System and fan switching with access lockouts
z Auxiliary time clock output (economizers)
z Equipment monitoring inputs and indication
z External time clock input
z Access to programming or schedule may be locked out or

limited with the use of an access code

z Fahrenheit or Celsius temperature display

Contents

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Setting Clock & Schedule . . . . . . . . . . . . . . . . . . . . . . . . .7

Program Options & Operating Features . . . . . . . . . . . . . . .8

Checkout & Troubleshooting . . . . . . . . . . . . . . . . . . . . . . .10

LED Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

User’s Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Mounting

The SZ1009, SZ1022, SZ1031 and SZ1035 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 then be mount­ed in an area which is accessible for adjusting its settings.

Caution: Remove power from thermostat prior to
mounting.

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 thermostats may be
powered from the same transformer, provided 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 half­wave rectified and have common return paths.

When the Superstat is used as a stand-alone 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.

R

2800 LAURA LANE

l MIDDLETON, WI 53562 l [phone] l FAX [phone] l www.tcs-basys.com

2

Wiring

The SZ1009, SZ1022, SZ1031 and SZ1035 use standard ter­minal designations for wiring. See diagram below.

REMOTE TEMPERATURE 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 SZ1022 accepts two 2-wire remote sensors and the
SZ1009, SZ1031 and SZ1035 accept three. 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.

1

For communication wiring, use twisted,
shielded 18 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.

*

Not available with the SZ1022.

6

Up to nominal 28 VAC from equipment
transformer.

A

B

Time Clock

Output

Remote

Zone/Return

Air Temp

R W1 W2

Y1 Y2

Y/W3

0 B/0 Y/W4 A2 A1

D13 0VR T1 T1+24 – DI1 DI2

A B

T2 T2 T3 T3

6

**

Available only on SZ1035. For 3 Heat &
3 Cool mode, B/O is W3 and Y/W4 is Y3.

R Y1 W1 G

A B

SZ1009 Output Wiring

See drawing at left for

input and power wiring.

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2800 LAURA LANE

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3

Setup

Note: If using remote sensor(s), the calibration 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 settings
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.*

* (SZ1009, SZ1031 and SZ1035 only)

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 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.

1 2 3 4 5

1 2 3 4 5

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4

Programming

The SZ1009, SZ1022, SZ1031 and SZ1035 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 dipswitches, or an access code
may be required.

fan

Occupie d

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

11-19-01

Main Monitoring Screen. Press the pro­gram setup button to access the following
screens. (Date not shown on SZ1009 or
SZ1022.)

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 program, set a unique address
from 0 to 255, excluding 248. All con-

trollers on a network must have a sepa­rate and unique communications
address.

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

11.

UNOCCUPIED HEAT

SETPOINT:

OCCUPIED HEAT

10.

SETPOINT:

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

SET BAUD RATE:

9.6K

3.

program

setup

YES

AUTO

YES

ON

AUTO

68F

60F

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 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, 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 ON (continuous), COOL (gas
heat or no heat), or AUTO for your fan
run times during the occupied modes.

Unoccupied Fan Mode Screen.

Choose from AUTO or COOL for your
fan run times in the unoccupied mode.

Occupied Heat Setpoint Screen. Set
the occupied heat setpoint.

Unoccupied Heat Setpoint Screen.

Set the unoccupied heat setpoint.

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5

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

HEAT STAGE 1

21.

OFFSET:

0F

ENABLE THIRD

COOL

STAGE AS:

20.

18.

ENABLE SECON D

STAGE COOL?

ENABLE SECON D

STAGE HEAT?

17.

SET OVERRIDE

15.

TIME: 180 MINUTES

LIMIT SETPOINT

5F

ADJUST +/-:

14.

SETPOINT:

UNOCCUPIED COOL

13.

12.

OCCUPIED COOL

SETPOINT:

program

setup

program

setup

ENABLE 3 HEAT &

3 COOL

16.

SZ1022,
SZ1031

program

setup

19.

ENABLE 3RD & 4TH

STAGE AS:

SZ1035

program

setup

If yes,
to 21.

72F

80F

NO

YES

YES

COOL

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
Superstat will maintain occupied set­points when overridden.

Enable Third Heat & Cool Screen.

Choose whether the SZ1035 will control
a third stage of heating AND cooling.
(Select NO if not using a third stage of
heating and cooling.) (Only shown on
SZ1035.)

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.) (Not
shown on SZ1009.)

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.) (Not
shown on SZ1009.)

Enable Third & Fourth Stage Screen.
If NO selected in screen 16, choose

run system in two stages of heat and 2
stages of cool only. (only shown on
SZ1035.)

Third Stage Choice Screen. Choose
from HE(Select DISABLE if not using a
third stage of heat or cool.) (Not shown
on SZ1009 or SZ1035.)

Heat Stage 1 Offset Screen. Enter an
offset value for heat stage 1. First stage
is normally 0 offset. (Not shown on
SZ1009.)

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

31.

COOL STAGE 3

OFFSET:

HEAT STAGE 3

30.

DIFF:

HEAT STAGE 3

OFFSET:

29.

28.

COOL STAGE 2

1F

DIFF:

27.

COOL STAGE 2

OFFSET:

1F

26.

COOL STAGE 1

1F

DIFF:

25.

COOL STAGE 1

OFFSET:

0F

.

24.

1FDIFF:

23.

HEAT STAGE 2

OFFSET:

1F

program

setup

HEAT STAGE 1

1F

22.

DIFF:

2F

1F

2F

HEAT STAGE 2

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. (Not
shown on SZ1009.)

Heat Stage 2 Differential Screen. Enter a
differential value for heat stage 2. This
screen only appears if stage 2 is enabled.
(Not shown on SZ1009.)

Cool Stage 1 Offset Screen. Enter an
offset value for cool stage 1. First stage is
normally 0 offset. (Not shown on SZ1009.)

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. (Not
shown on SZ1009.)

Cool Stage 2 Differential Screen. Enter
a differential value for cool stage 2. This
screen only appears if stage 2 is enabled.
(Not shown on SZ1009.)

Heat or Cool Stage 3 Offset Screen.

Enter an offset value for heat or cool stage

3. This screen only appears if stage 3 is
enabled. (Not shown on SZ1009.)

Heat or Cool Stage 3 Differential Screen.

Enter a differential value for heat or cool
stage 3. This screen only appears if stage
3 is enabled. (Not shown on SZ1009.)

Cool Stage 3 or Stage 4 Offset Screen.

Enter an offset value for cool stage 3 or
stage 4. This screen only appears if this
stage is enabled. (Only shown on
SZ1035).

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6

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

40.

39.

38.

37.

36.

35.

34.

33.

32.

COOL STAGE 3
DIFF:

program

setup

ENABLE DISCHARGE

AIR SENSOR?

SET CONTROL

MODE:

DISCHARGE AIR

LOW LIMIT:

TIMECLOCK OUTPUT

OCCUPIED=CLOSED

DISCHARGE AIR

HIGH LIMIT:

ENABLE OUTDOOR

AIR SENSOR?

COOLING LOCKOUT

TEMP:

HEATING LOCKOUT

TEMP:

1F

P+I

YES

45F

120F

YES

65F

70F

Cool Stage 3 or Stage 4 Differential
Screen. Enter a differential value for

cool stage 3 or stage 4. This screen only
appears if this stage is activated. (Only
shown on SZ1035.)

Control Mode Screen. Enter if 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). (Not
shown on SZ1009.)

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.

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. (Not shown on SZ1022.)

Cooling Lockout Screen. Enter an out­door air cooling lockout temperature.
This screen will not appear if the outdoor
air sensor function is disabled. (Not
shown on SZ1022.)

Heating Lockout Screen. Enter an out­door air heating lockout temperature.
This screen will not appear if the outdoor
air sensor function is disabled. (Not
shown on SZ1022.)

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

program

setup

MON

72F

12:00 AM

11-19-01

47.

46.

45.

44.

43.

42.

41.

SET DI2 SETPOINT

SHIFT:

program

setup

48.

program

setup

49.

SET ACCESS

CODE:

000

REQUIRE CODE FOR

CLOCK/SCHED?

YES

REQUIRE CODE FOR

PROGRAMMING?

YES

ENABLE SMART

YES

RECOVERY?

DELAY ON POWERUP

10 SECONDS

DI3 USED FOR:

FILTER SERVICE

DI2 USED FOR:

SERVICE

DI1 USED FOR:

MONITOR

00F

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.

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. (Date not
shown on SZ1009 or SZ1022.)

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7

Setting Clock & Schedule

The SZ1009, SZ1022, SZ1031 and SZ1035 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 software 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.

clock
setup

ENTER ACCESS

SET TIME & DAY:

MON

12:00 AM

2.

000

CODE

fan

Occupi ed

Heating

Cooling

Fan

Service

Program/

COOLER

WARMER

Data

switch

service

status

system

switch

program

setup

clock
setup

override

override

override

11-19-01

clock
setup

clock
setup

clock
setup

Main Monitoring Screen. Press the
clock setup button to access the follow­ing screens. (Date not shown on
SZ1009 or SZ1022.)

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.

Date Screen. Set the month, date, and
year. (Not available on SZ1009 or
SZ1022.)

SET OCCUPIED

A:08:00 TO 12:00

4.

5.

TIMES MONDAY:

B:13:00 TO 17:00

SET OCCUPIED

6.

TIMES TUESDAY:

The following screens are repeated
for Wednesday, Thursday, Friday,
Saturday, Sunday, Holiday #1 & #2.

COPY MON FOR

TUE?

7.

ENTER DATES FOR

HOLIDAY #1:

DAYLIGHT

HOL1 01=01-01

10.

11.

12.

13.

DURATION=00 DAYS

SAVINGS?

9.

ENTER DATES FOR

HOLIDAY #2:

HOL2 01=01-01

DURATION=00 DAYS

MON

72F

12:00 AM

8.

A:08:00 TO 12:00

B:13:00 TO 17:00

clock
setup

override

clock
setup

clock
setup

clock
setup

clock
setup

clock
setup

clock
setup

clock
setup

clock
setup

override

override

override

11-19-01

YES

YES

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.

Note: No holidays on SZ1009
or SZ1022.

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.

Holiday Announcement Screen.

Announces the next screen. (Not
available on SZ1009 or SZ1022.)

Holidays #1 Screen. Set holiday
periods 1 through 12, month, date,
and duration for the periods that will
follow the holiday #1 schedule. (Not
available on SZ1009 or SZ1022.)

Holiday Announcement Screen.

Announces the next screen. (Not
available on SZ1009 or SZ1022.)

Holidays #2 Screen. Set holiday
periods 1 through 12, month, date,
and duration for the periods that will
follow the holiday #2 schedule. (Not
available on SZ1009 or SZ1022.)

Daylight Savings Screen. Choose
to have automatic daylight savings
adjustments to your time. (Not avail­able on SZ1009 or SZ1022.)

Main Monitoring Screen. (Date not
shown on SZ1009 or SZ1022.)

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8

Operation

UNOCCUPIED SETBACK

The SZ1009, SZ1022, SZ1031 and SZ1035 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 an occupancy or light sensor, set DI3 to exter­nal 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 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 SZ1024 and SZ1033 accept a remote discharge air sensor
for monitoring purposes. (See setup instructions for dipswitch
placement for this option.)

Choose YES in programming screen #30 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 #31 and #32. 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, SZ1031 and SZ1035 accepts a remote 1000 Ω
outdoor temperature sensor for monitoring purposes. (See
setup instructions for dipswitch placement for this option.)

Choose YES in programming screen #33 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
#34 and #35. 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, SZ1022, SZ1031 and SZ1035 allow DI1 to be
set for fan proving to protect 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 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.

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9

D12 SETPOINT SHIFT

The SZ1009, SZ1022, SZ1031 and SZ1035 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.

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 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.

In summary, unlike most other multi-stage programmable
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.

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

DI2 Cooling Lockout NO OK YES - locks out 2nd Dry contact, switch.

(COOL LOCKOUT ON or OFF) and 3rd stage cooling

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

Heat Setpoint

Cool Setpoi nt

ON

ON

ON

ON

OFF

OFF

OFF

OFF

Differential

Differential

Offset

Offset

Differential

Differential

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10

P + I OPTION

The SZ1009, SZ1022, SZ1031 and SZ1035 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 stage of cooling is disabled.

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.

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 24 VAC. For loads that exceed this, use
an external relay. It may be set to be open (NO) or closed
(NC) when the thermostat is operating in the occupied mode,
and will be the opposite during the unoccupied mode.

BUILT-IN DELAYS

The SZ1009, SZ1022, SZ1031 and SZ1035 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 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 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 POWER UP

The SZ1009, SZ1022, SZ1031 and SZ1035 have 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 seconds,
where no outputs are allowed to turn on for that length of time
on power up. Setting each unit to a different delay allows you
to soft start your system, and thus prevent this peak.

Checkout & T

roubleshooting

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, date (SZ1031 and SZ1035
only), and current temperature.

3. Press the PROGRAM SETUP button until you reach the
screen #14 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 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.

MON

TCS V1.0

11-19-01

12:00AM 72F

OVERRIDE

178 MINUTES

HEAT STAGE 1 OFF

4.

5.

HEAT STAGE 2 OFF

service

status

service

status

ON

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11

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 #14 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 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 whenever 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 limits,
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”, “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 three adjustment pots located in the cover to adjust them.
“T1” is for the room temperature, “T2” is for the discharge air
temperature, and “T3” is for the outdoor 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
Ω sensor should read 1080 to 1090 Ω at room temperature.
The built-in sensor should read 108 to 109 Ω at room temper­ature.

Override Status Screen. Shows whether
the override is active and if so, how many
minutes remaining.

Heat Stages Status Screen. Shows the
status of the first and second stages of
heating.

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.

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 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

Through repeated pressing of the SERVICE
STATUS button, the service screens (shown
below) are displayed, which enables you to moni­tor various functions of the Superstat.

MON

72F12:00 AM

DISCHARGE AIR

55F

OUTDOOR AIR

75F

SERVICE STATUS

OK

TEMP

1.

2.

3.

TEMP

service

status

service

status

service

status

service

status

11-19-01

service

status

Main Monitoring Screen. Press the ser­vice button to access the following screens.
(Date not shown on SZ1009 or SZ1022.)

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.

Outdoor Air Temperature Screen. Shows
outdoor air temperature if sensor is used.
(Not available on SZ1022.)

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 # 14.

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 #15.

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 #43, 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 #42, 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

TM

User’s Guide. This guide is designed to assist the installer in
explaining to the user how to operate their new thermostat, 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 thermostat
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 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.

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12

Rev. 0900

SUPERSTAT

TM

COOL STAGE 1

COOL STAGE 3

6.

7.

COOL STAGE 2

FAN STATUS

DI2 SERVICE

FILTER

10.

MON

72F

12:00 AM

service
status

service
status

COOL STAGE 3

8.

service
status

9.

service
status

DI1 STATUS

COOL STAGE 4

SZ1035

SZ1009,
SZ1022,
SZ1031

OK

ON

OFF

OK

OK

OK

OK

OFF

11-19-01

OFF

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.

Third and Fourth Stage
Status Screen. Shows the

status of the third and fourth
stages.

DI1 Status Screen. Shows
the status of DI1.

DI2 and DI3 Status Screen.

Shows the cool lockout into
DI2 or DI2 status and filter
status or DI3 status.

Main Monitoring Screen.

(Date not shown on SZ1009
or SZ1022.)