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2800 LAURA LANE •  MIDDLETON, WI 53562 •  (800) 288-9383 •  FAX (608) 836-9044 •  www.tcsbasys.com

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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.

TIM ECLOCK OUTPUT

OCCUPIED=CLOSED

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30.

SET CONTROL

MODE:

REVERSING  VALVE 

OUTPUT

28b.

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27b.

COOL STAGE 2

2F

DIFF:

AUX HEAT STAGE 2

2F

DIFF:

120F

45F

YES

P+I

NO

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HEAT STAGE 1

2F

DIFF:

COM P STAGE 1

1F

21b.

DIFF:

HEAT STAGE 1

OFFSET:

0F

COM P 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:

COM P STAGE 2

1F

DIFF:

HEAT STAGE 2

OFFSET:

2F

22b.

COM P STAGE 2

OFFSET:

1F

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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.

Summary of Contents for SZ1022N

Page 1: ...ut economizers z Fan interlock safety option z Filter service input and indication z Equipment monitoring inputs and indication z External time clock input z Energy management input for setpoint shift...

Page 2: ...hielded 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 s...

Page 3: ...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 you...

Page 4: ...g 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 ente...

Page 5: ...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 sc...

Page 6: ...his 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 Au...

Page 7: ...creen 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 softwa...

Page 8: ...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 se...

Page 9: ...rential 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...

Page 10: ...e 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...

Page 11: ...e 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 d...

Page 12: ...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 acces...

Page 13: ...e 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 set...

Page 14: ...s 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...

Page 15: ...eck 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...

Page 16: ...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...

Page 17: ...e 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 en...

Page 18: ...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 funct...

Page 19: ...R 2800 LAURA LANE MIDDLETON WI 53562 800 288 9383 FAX 608 836 9044 www tcsbasys com 19...

Page 20: ...R 2800 LAURA LANE MIDDLETON WI 53562 800 288 9383 FAX 608 836 9044 www tcsbasys com 20 Rev 0305...

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