Install Instructions

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THE PECO COMMERCIAL T8168 THERMOSTAT

Thank you for choosing a PECO

Performance PRO™ thermostat. The T8168

thermostat is intended for commercial and residential enviroments. It supports

both programmable and non-programmable operation.

Key features include: auto-changeover; optional remote sensor; three levels of

keypad lockout with optional PIN access code; a heat/cool Demand Indicator;

up to four scheduled events per day, a 365-day calendar, 20 holidays, holiday

override and temporary override.

Applications

The PECO

Performance PRO™ T8168 applications include fan coil, PTAC and

conventional system with a single, multi speed or 0-10 VDC Fan.

System Mode Selections: Off-Heat-Cool-Auto

ON-OFF Heat/Cool Outputs: Up to 2 Heat, 2 Cool

Proportional Heat/Cool Outputs: Three Wire Floating or 0-10 VDC Control

Fan Control: Cycling (Auto) or Continuous (On); Up to 3 Speeds or Staged

Permanent Memory: All device settings are stored in permanent memory.

Optional Connections: Remote Sensor, Pipe Sensor, Fault Detection and Setback

RATINGS

Outputs: Y1, Y2, W1, W2, G, G1

24 VAC (20-30 VAC); 50/60 Hz

10 VA

Outputs: WD, GD, YD

0-10 VDC: Loads must be 1.2K ohms minimum

4-20 mA: Loads must be 600 ohms maximum

This thermostat uses triacs switching for accuracy and quiet operation.

INSTALLATION INSTRUCTIONS

Select an appropriate thermostat location

Locate the thermostat about four feet (1.2m) above the oor on a wall with good

ventilation, average temperature and good response to temperature changes.

The T8168 may be mounted on a:

• Horizontal or vertical 2” X 4” device box

• Horizontal 4” X 4” device box

• Flat surface

Do not locate the thermostat where it can be affected by:

• Direct sunlight

• Drafts or dead areas behind doors

• Radiating heat or cool from appliances or equipment

• Concealed pipes or chimneys

• Outside walls or unheated/uncooled areas

Required components (not included, unless otherwise specied):

• Screws and wall anchors (included)

• Screwdrivers: Phillips (for wallplate); small athead (for terminal blocks)

• Drill with 3/16” drill bit (or 7/32” for plaster)

• Wire cutter and stripper

• Level

TERMINAL BLOCK DESIGNATIONS

Terminal \Description Return To

24 VAC-1 24 VAC 1 (UNSWITCHED)

24 VAC-2 24 VAC 2

Y1 COOL 1 COOL Open (TWF) 24 VAC 1

W1 HEAT 1 HEAT Open (TWF) 24 VAC 1

Y2 COOL 2 or FAN 3 (MED) COOL Close (TWF) 24 VAC 1

W2 HEAT 2 HEAT Close (TWF) 24 VAC 1

G FAN 1 (HI) 24 VAC 1

G1 FAN LO or DAMPER Configurable 24 VAC 1

YD 0-10VDC COOL (4-20mA) 24 VAC 2

WD 0-10VDC HEAT (4-20mA) 24 VAC 2

GD 0-10VDC FAN (4-20mA) 24 VAC 2

S1 REMOTE SENSOR, FAULT DETECTION SC

S2 PIPE SENSOR SC

SC DC/SENSOR COMMON

4A Not Available

4B Not Available

4C Not Available

• WARNING: Disconnect power before beginning installation.

• CAUTION: Use copper wire only

• CAUTION: Do not connect unused wires together

TECHNICAL SPECIFICATIONS

Temperature Control Range: 50° to 90° F (10° to 32° C)

Differential: 1° F (0.5°C)

Input Power: 24 VAC (20-30 VAC) 50/60 Hz (+/- 10%)

Terminal Connections: 14-24 AWG stranded or solid wire

Operating Temperature: 0° to 120°F (-18° to 49°C)

Shipping/Storage Temperature: -20° to 130°F (-29° to 54°C)

Operating Humidity: 5% to 95% RH, non-condensing

Physical Dimensions: 4.3” H x 5.7” W x 1.3”D

Proportional Output Band Width: 2°F (1°C)

Proportional Stroke Time Default: 2 Minutes (Congurable)

T8168 INSTALLATION GUIDE

CONTROL

SYSTEMS

CAUTION!

• 24 VAC low-voltage thermostat. Do not install on voltages higher than 30 VAC.

• Use copper wire only

• Use care to avoid electrostatic discharge to the thermostat.

▲

Note: A load must be

connected to outputs

for testing

Mounting holesMounting holes

Wiring passage

WARNING

• READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO

INSTALL, OPERATE OR SERVICE THIS THERMOSTAT.

• Failure to observe safety information and comply with instructions could

result in PERSONAL INJURY, DEATH AND/OR PROPERTY DAMAGE.

• To avoid electrical shock or damage to equipment, disconnect power

before installing or servicing and use only wiring with insulation rated for full

thermostat operating voltage.

• Use care to avoid electrostatic discharge.

• To avoid potential re and/or explosion do not use in potentially ammable

or explosive atmospheres.

• Retain these instructions for future reference.

• This product, when installed, will be part of an engineered system whose

specications and performance characteristics are not designed or

controlled by PECO

. Review applications and national and local codes to

assure that the installation will be functional and safe.

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Summary of content (8 pages)

PAGE 1
CONTROL SYSTEMS T8168 INSTALLATION GUIDE ! WARNING ▲ THE PECO COMMERCIAL T8168 THERMOSTAT Thank you for choosing a PECO® Performance PRO™ thermostat. The T8168 thermostat is intended for commercial and residential enviroments. It supports both programmable and non-programmable operation.
PAGE 2
PART I: INSTALL WALL PLATE 1. Position the wall plate on the wall with the directional arrow pointing up and terminal blocks facing outward. 2. Pull equipment wires through the wall plate wiring passage. 3. Use a level to determine the best horizontal wall plate mounting position. 4. Mark positions of screw holes (two) with a pencil and remove wall plate. 5. Drill holes at pencil-marked locations (3/16” for drywall, 7/32” for plaster). 6. Insert the wall anchors in the holes, tapping them into place. 7.
PAGE 3
THERMOSTAT PROGRAMMING FAN COIL 2-PIPE/ 4-PIPE OPERATION This thermostat is easily changed from non-programmable to programmable operation in Service Menu 100. See the Operating Maunal for detailed instructions on setting up schedules. In non-programmable mode the thermostat controls to a single setpoint with the dead band used for auto changeover from Heat to Cool. Service Menu 171 sets 2-pipe or 4-pipe fan coil operation.
PAGE 4
ADVANCED CONFIGURATION SERVICE MENUS CONFIGURE SERVICE MENUS The following Service Menus (SM) commonly require configuration. Please verify that these are set for your specific application. Additional configuration may be required.
PAGE 5
112 System Fan Type 0 = On/Off Fan (Default) 1 = 0–10VDC FAN Hi-MED-LO Fan 2 = Proportional 0-10VDC Fan 0: Uses available fan speeds per Service Menu 110 1: Uses GD output for 0-10 VDC fan. User selection of speed. HI Speed is set at SM 125-126,LO speed is set at SM 127, MED is set between HI-LO*. 2: Uses GD output for 0-10 VDC fan. Modulates between Min and Max selections in SM 125-127*.
PAGE 6
300 Range High 50-90 F (90F Default) The highest selectable temperature setpoint value 310 Setback Low Off, 50-90 F (67F Default) Accessed from Wi-Fi or by occupancy sensor detection. “Off” turns heating setpoint off. 320 Setback High Off, 50-90 F (78F Default) Accessed from Wi-Fi or by occupancy sensor detection. “Off” turns cooling setpoint off.
PAGE 7
520 Default Display Icons 0- Time, Temp, SP (Default) Icons that will be displayed in the default state. 1- Time, Temp NOTE: Setpoint will not be displayed if T8168 System Mode is OFF. 2- Time 3- Temp 4- None 5 - Set Point Only 530 Revision Displays Current Revision Information 540 Factory Default Reset 0- Disable (Default) 600 Cooling System Output Test When enable is selected he device will return to factory default settings.
PAGE 8
Wiring Diagram: ON-OFF Operation 24 24 24 Wiring Diagram: Three-Wire Floating Operation 24 VAC 1 (UNSWITCHED) 24 VAC XFMR 24 VAC 2 24 VAC 2 24 24 24 24 VAC 1 (UNSWITCHED) 24 VAC XFMR 24 VAC 2 24 VAC 2 Y1 COOL STAGE 1 Y1 COOL OPEN W1 HEAT STAGE 1 W1 HEAT OPEN Y2 COOL STAGE 2 OR FAN MED Y2 COOL CLOSE OR FAN MED W2 HEAT STAGE 2 W2 HEAT CLOSE G FAN HI G FAN HI G1 FAN LO OR DAMPER G1 FAN LO OR DAMPER YD 0-10V OR 4-20mA COOL YD 0-10V OR 4-20mA COOL WD 0-10V OR 4-20mA HEAT WD