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PECO T8168B-2 BACnet Proportional Thermostat Installation Guide

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T8168B-2 BACnet^®INSTALLATION GUIDE

The PECO BACnet^®T8168B-2 thermostat

WARNING

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Thank you for choosing a PECO^®Performance PRO™ thermostat. The

T8168B-2 thermostat is intended for commercial and residential enviroments. It

supports both programmable and non-programmable operation.

Key features include: Either BACnet^®IP or MS/TP Connectivity, 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.

• 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.

Applications

• Use care to avoid electrostatic discharge.

• To avoid potential ﬁre and/or explosion do not use in potentially ﬂammable

or explosive atmospheres.

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

• Retain these instructions for future reference.

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

speciﬁcations 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.

CAUTION!

TERMINAL BLOCK DESIGNATIONS

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

Terminal

\Description

Return To

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• Use copper wire only

• Use care to avoid electrostatic discharge to the thermostat.

24 VAC-1 24 VAC 1 (UNSWITCHED)

24 VAC-2 24 VAC 2

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.

24 VAC-2 24 VAC 2

Note: A load must be

connected to outputs

for testing

COOL 1

HEAT 1

COOL Open (TWF)

HEAT Open (TWF)

24 VAC 1

24 VAC 2

COOL 2 or FAN 3 (MED) COOL Close (TWF)

HEAT 2

HEAT Close (TWF)

FAN 1 (HI)

FAN LO or DAMPER Configurable

0-10VDC COOL (4-20mA)

0-10VDC HEAT (4-20mA)

0-10VDC FAN (4-20mA)

REMOTE SENSOR, FAULT DETECTION

PIPE SENSOR

INSTALLATION INSTRUCTIONS

Select an appropriate thermostat location

Locate the thermostat about four feet (1.2m) above the ﬂoor 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

DC/SENSOR COMMON

RS485A (-)

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

RS485B (+)

RS485 COMMON

• Outside walls or unheated/uncooled areas

Required components (not included, unless otherwise speciﬁed):

• Screws and wall anchors (included)

• WARNING: Disconnect power before beginning installation.

• CAUTION: Use copper wire only

• CAUTION: Do not connect unused wires together

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

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

• Wire cutter and stripper

TECHNICAL SPECIFICATIONS

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

Differential: 1° F (0.5°C)

• Level

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)

Mounting holes

Wiring passage

Proportional Stroke Time Default: 2 Minutes (Conﬁgurable)

P/N 74599 3220-2406 REV 00

VIEW FULL SCREEN PDF MANUAL

General	Details
Name	PECO T8168B-2 BACnet Proportional Thermostat Installation Guide
Make	PECO
Language	English
Filetype	PDF (Download)
File size	0.42 MB

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Get the free PDF manual for the PECO T8168B-2 BACnet Proportional Thermostat Installation Guide and access setup steps, usage instructions, and troubleshooting tips. 👉 View online or download now to keep your thermostat running smoothly!

PECO T8168B-2 BACnet Proportional Manual: Questions and Answers

PECO T8168B-2 BACnet Proportional specifications

Setpoint range	50° to 90° F (10° to 32° C)
Differential	1° F (0.5°C)
Operating temperature	0° to 120°F (-18° to 49°C)
Humidity	5% to 95% RH, non-condensing

Full specifications, page 1

Can I use the PECO T8168B-2 BACnet Proportional thermostat on voltages higher than 30 VAC?

No. It is a 24 VAC low-voltage thermostat rated for 20-30 VAC input only. Installation Guide, p. 1

What does the PECO T8168B-2 BACnet Proportional proportional output band width of 2°F mean?

This is the temperature differential range over which the proportional outputs modulate for heating and cooling control. Installation Guide, p. 1

What does the Proportional Stroke Time setting on PECO T8168B-2 control?

It sets how long the proportional output takes to fully cycle. Default is 2 minutes and is configurable. Installation Guide, p. 1

What do the indicator lights mean on my thermostat display?

Red LED blinks when fault detection is active on open or closed conditions, or when a remote sensor has an open or short circuit fault. Installation Guide, p. 5

PECO T8168B-2 BACnet Proportional compared with other PECO thermostats

Specification	PECO T8168B-2 BACnet Proportional	PECO TW180
Setpoint range	50° to 90° F (10° to 32° C)	50 to 90°F
Differential	1° F (0.5°C)	1°F
Operating temperature	0° to 120°F (-18° to 49°C)	0°F to 120°F (-18° to 49°C)
Humidity	5% to 95% RH, non-condensing	5%-95% RH, non-condensing