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TCS Basys Controls SZ1017a Product Manual

Modulating thermostat
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Product Manual
Description
The SZ1017a, SZ1041, SZ1051 and SZ1053 are microproces-
sor-based programmable thermostats designed to control air
handling units with modulating economizers and/or modulat-
ing heating or cooling. The SZ1041, SZ1051 and SZ1053
have a 365-day time clock, while the SZ1017a has a 7-day
time clock.
Features
Stand-alone or network operation
!
Outdoor air sensor input with heating & cooling lockout
!
Adjustable delay on powerup for soft starts
!
P+I control option
!
Smart Recovery
!
No battery backup required
!
Built-in HVAC equipment protection
!
32 character LCD display
!
Six status LEDs for monitoring
!
Remote room sensing capability
!
User setpoint adjustment limits
!
Local and remote override capability
!
System and fan switching with access lockouts
!
Equipment monitoring inputs and indication
!
External time clock input
!
Access to programming or schedule may be locked out or
!
limited with the use of an access code
Fahrenheit or Celsius temperature display
!
2800 LAURA LANE
MIDDLETON, WI 53562
SZ1017a/SZ1041
SZ1051/SZ1053
Modulating Thermostats
Contents
Description
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Features
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Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Limiting Occupant Access . . . . . . . . . . . . . . . . . . . . . . . . .16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting
The SZ1017a, SZ1041, SZ1051 and SZ1053 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 inte-
rior 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 win-
dows, 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.
(800) 288-9383
FAX (608) 836-9044
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www.tcs-basys.com
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Summary of Contents for TCS Basys Controls SZ1017a

  • Page 1: Table Of Contents

    ........have a 365-day time clock, while the SZ1017a has a 7-day Setup .

  • Page 2: Wiring

    POWERING THE SZ1017a, SZ1041, SZ1051 and SZ1053 Superstats are powered from 24 VAC +/- 20%. The SZ1017a, SZ1041, SZ1051 and SZ1053 use standard ter- minal designations for wiring. See diagram below. If wiring for communications, dedicated power must be used to power the Superstat.
  • Page 3 Output Wiring for the SZ1017a Time Clock Output Output Wiring for the SZ1041 Output Wiring for the SZ1051 Time Clock Output Output Wiring for the SZ1053 Time Clock Output 2800 LAURA LANE MIDDLETON, WI 53562 (800) 288-9383 FAX (608) 836-9044...

  • Page 4: Setup

    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 KEYPAD ACCESS using remote room, discharge, and/or outdoor sensors. The dipswitches in the cover (shown above connected with ribbon cable) must be set in order to lock the user out of pro- Use the following guide to determine the dipswitch settings...

  • Page 5: Programming

    Programming Display Type Screen. Choose between TEMPS SHOWN IN: FAHRENHEIT and CELSIUS for tempera- The SZ1017a, SZ1041, SZ1051 and SZ1053 may be pro- ture indication. FAHRENHEIT grammed through the keypad on the face, or with a PC. If programming with a PC, the following must be set through...
  • Page 6 SZ1017a Go to #23d. p. 10 Main Monitoring Screen. (Date not shown 11-19-01 on SZ1017a.) 12:00AM SZ1051 Go to #23a. p. 8 (Instructions continued on page 11.) SZ1053 Go to #23c. p. 9 2800 LAURA LANE...
  • Page 7 SZ1041 Programming Sequences Outdoor Air Sensor Function Screen. Choose whether or not you are using an out- ENABLE OUTDOOR 27b. door air sensor function. To monitor only, Second Stage Heat Screen. Indicate AIR SENSOR? 16b. select NO. See setup instructions for dip- whether the thermostat will control a ENABLE SECOND switch settings which must also be set.
  • Page 8 Modulating Output 1 Define Screen. Discharge Air Low Limit Screen. Choose whether the modulating output COO L S TAG E 2 32a. MOD OUT 1 23a. DSCHRGE AIR ECON will be used for COOL, HEAT or AQUAS- Enter a discharge air low limit value. DIFF: TAT.
  • Page 9 Discharge Air Low Limit Screen. Enter Modulating Output 1 Proportional Band a discharge air low limit value. This 34c. COO L S TAG E 1 COOL STAGE 2 MO 1 PROPORTIONAL DISCHARGE AIR 23c. screen will not appear if the discharge air Screen.
  • Page 10 Modulating Output Define Screen. Choose whether the modulating output 23d. Discharge Air High Limit Screen. MODULATING OUT will be used for COOL, HEAT or AQUA- 31d. DISCHARGE AIR Enter a discharge air high limit value. STAT. With DI2 set to AQUASTAT, the COOL This screen will not appear if the dis- analog output will be used for cooling...

  • Page 11: Setting Clock & Schedule

    Holiday Announcement Screen. ENTER DATES FOR Announces the next screen. (This screen The SZ1017a, SZ1041, SZ1051 and SZ1053 clock and sched- not shown on SZ1017a.) HOLIDAY #1: ule may be set through the keypad and display, or with a PC.
  • Page 12 (SZ1017a, SZ1053) abling the timed override. The analog output on the SZ1017a is used to control the heat- ing or cooling in a space. The analog outputs on the SZ1053 SETBACK AND OVERRIDE APPLICATIONS are used to control the heating and cooling in a space.
  • Page 13 DI2 SETPOINT SHIFT REVERSE ACTING DIRECT ACTING The SZ1017a, SZ1041, SZ1051 and SZ1053 allow DI2 to be set for setpoint shift for energy demand setback. This is enabled by setting DI2 to the MONITOR mode. A digital con- tact that closes when setback is needed should be wired into DI2.
  • Page 14 BUILT-IN DELAYS When DI2 is selected to have an aquastat function, and analog The SZ1017a, SZ1041, SZ1051 and SZ1053 have delays built output one is selected to have an aquastat function, operation into the programming sequences to protect equipment. The fan is as follows.

  • Page 15: Checkout & Troubleshooting

    7. Press the cooler (down) button until the heating setpoint is DELAY ON POWERUP one degree less than the current temperature. The heating The SZ1017a, SZ1041, SZ1051 and SZ1053 have an stage(s) will sequence off. The fan will turn off 2 minutes adjustable delay on powerup. When several thermostats are after the last heating stage.
  • Page 16 DI1 Status Screen. Shows the status of Check wiring. A separate transformer should be used for the the fan interlock or DI1. SZ1017a, SZ1041, SZ1051 or SZ1053, and a separate trans- former should be used for the motor(s). Check to make sure service status that the analog output is programmed correctly.

  • Page 17: Led Description

    #15. Main Monitoring Screen. (Date not shown 11-19-01 on SZ1017a.) FAN SWITCHING 12:00 AM The option to allow the occupant to change the occupied fan LED Description mode is allowed by factory default. To lock out access to fan switching, see programming step #7.

  • Page 18: Laura Lane Middleton, Wi 53562 (800)

    User’s Guide Inside the hinged door of the thermostat is the Superstat User’s Guide. This guide is designed to assist the installer in explaining to the end user how to operate their new thermo- stat, as well as serve as a handy future reference for the end user.

This manual is also suitable for:

Sz1051Sz1041Sz1053

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