tekmar 538 Installation

D538

tekmarNet®4 Thermostat 538

Installation & Operation Manual

Introduction

The tekmarNet®4 Thermostat 538 provides operation for:

One Stage Heat•

12/11

Zoning

Replaces:08/10

Features

Zone Synchronization

• Zone Post Purge

• Intelligent setback (Timer 033)

• Scenes (Away override)

• Auto Heating Cycle

• tekmarNet® 4 communication

• compatible

Requires 4 wires

• Pulse Width Modulation

• CSA C US Approved for use in

• USA and Canada

Outdoor temperature display

• Air Group member

• Backlight

• Freeze Protection

• Equipment Exercising

• Floor warming (Slab Sensor 079)

• 1 Auxiliary sensor input

• Room Temperature Limiting

• Supports Radiant Floor Cooling

•

D 538 - 12/11

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Table of Contents

Getting Started ..............................2

Installation .........................................2

Caution ..........................................2

Preparation ....................................2

Removing The Thermostat Base ...3

Mounting The Thermostat Base ....3

Thermostat Wiring .........................4

Testing the Thermostat Wiring ......4

Mounting the Thermostat ..............5

Cleaning the Thermostat ...............6

Switch Settings ..................................6

User Interface ....................................7

Display...........................................7

Button Operation ...........................7

Symbols Description .....................7

Settings ....................................8-14

Sequence of Operation .................... 15

Heating Operation ....................... 15

Air Group Operation .................... 16

Floor Cooling ...............................16

Schedules ................................... 17

Scenes (System Override) .......... 17

Troubleshooting ...............................18

Error Messages ......................18-21

Frequently Asked Questions .......22

Job Record ..................................23

Technical Data .............................23

Limited Warranty and Product

Return Procedure ........................24

Getting Started

Congratulations on the purchase of your new tekmar thermostat.

This manual will step through the complete installation, programming and sequence of operation for this control. At the back, there are tips for control and system troubleshooting.

Installation

Caution

Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury or death. It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. This electronic control is not intended for use as a primary limit control. Other controls that are intended and certified as safety limits must be placed into the control circuit.

Preparation

Tools Re q uired

tekmar or jeweller screwdriver

• Phillips head screwdriver

•

Materials Required

2, #6 x 1” Wood Screws

• 18 AWG LVT Solid Wire

• (Low Voltage Connections)

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Wire Stripper•

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Optional Adapter Plate 007 (for

• installation on 2” x 4” gang box)

Installation Location

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Choose the placement of the thermostats early in the construction process to enable proper wiring during rough-in.

Consider the following:

Interior Wall.

• Keep dry. Avoid potential leakage onto the control.

• Relative Humidity max 92% up to 104°F (40°C), 50% RH above 104°F (40°C).

• Non-condensing environment.

No exposure to extreme temperatures beyond 32-122°F (0-50°C).

• No draft, direct sun, or other cause for inaccurate temperature readings.

• Away from equipment, appliances, or other sources of electrical interference.

• Easy access for wiring, viewing, and adjusting the display screen.

• Approximately 5 feet (1.5 m) off the finished floor.

• The maximum length of wire is 500 feet (150 m).

• Strip wire to 3/8” (10 mm) for all terminal connections.

• Use standard 4 conductor, 18 AWG wire.

•

Removing The Thermostat Base

To remove the thermostat base:

Place a small slot screwdriver or similar

• tool into the slot located on the top of the thermostat.

While pushing down against the plastic

• tab, pull the thermostat away from the thermostat’s base.

Push tab

Remove thermostat

from base

Mounting The Thermostat Base

If a single gang switch box is used, an Adaptor Plate 007 is required to mount the thermostat to the box.

Fasten the base of the

• thermostat to the adaptor plate.

Feed the wiring through the

• openings in the back of the adaptor plate and thermostat.

Use the upper and lower screw

• holes to fasten the adaptor plate to the box.

Stud

Switch Box

/4”

Thermostat

Base

007 Adaptor

Plate

(83 mm)

Mounted on switch box

If a switch box was not used, mount the

/8”

(60 mm)

screwhole

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thermostat directly to the wall.

Feed the wiring through the openings in

•

the back of the thermostat. Use screws in the screw holes to fasten the

•

Thermostat

Base

Stud

thermostat to the wall. At least one of the screws should enter a wall stud or similar rigid material.

/8”

(60 mm)

screwhole

Wall

Mounted on wallboard

Thermostat Wiring

The thermostat operates a single heating system zone.

Connect tN4, C, R, and W terminals on the thermostat to the tN4, C, R, and W terminals on the tN4 Wiring Center or Zone Manager.

Connect the optional auxiliary sensor wires to the sensor terminals 5 and 6.

538

Slab Sensor 072, 073, 079

Indoor Sensor 076, 077, 084

Outdoor Sensor 070

Sensor

No Power

Use at least 75°C conductors For instructions see brochure

tN41C2R3W

tNt 538

One Stage Heat

Power: 24 V ±10% 50/60 Hz 1.8 VA 56 VA fully loaded Relay: 24 V (ac) 2 A

Switch Settings:

1001-0 3

Lock

Scene

Setback

Unlock

Oﬀ

1234

12 34

Not used

Mmm YYYY

Lot # 12345

Meets Class B:

Canadian ICES

FCC Part 15

tN4 Wiring Center

tN4 C W

tN4 Zone Manager

Testing the Thermostat Wiring

Testing the Power

1. Remove the front cover from the thermostat.

2. Use an electrical test meter to measure (ac) voltage between the R and C terminals. The reading should be 24 V (ac) +/– 10%.

3. Install the front cover.

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Testing the Heat Relay

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1. Remove the front cover from the thermostat.

2. Press the button and set the heating temperature below the current room temperature. There should be no H1 symbol on the display.

3. Set the electrical test meter to continuity.

4. Place probes between R (3) and W (4). There should be no continuity. If there is continuity then there may be a wiring fault or the relay may be faulty.

5. Press the button and set the heating temperature above the current room temperature. Make sure the display does not show “WWSD”. The “H1” symbol should appear on the display.

6. There should be continuity between the R (3) and W (4) terminals.

Testing the tekm a r N et®4 Bus

-----------------------------------------

The symbol is shown on the display when communication is present. If the thermostat is connected in a network and the communication is missing, there may be an open or short circuit on the tN4 and C bus wires.

1. Remove the front cover from the thermostat.

2. To test for short circuits:

Disconnect the tN4 bus wires on one end.

•

Install wire nuts on each wire to ensure the wire ends are not touching.

•

Disconnect the tN4 bus wires on the other end.

•

Measure for continuity using an electrical meter.

•

If continuity is present, there is a short circuit fault along the wires. It is

•

recommended to replace the tN4 bus wires.

3. To test for open circuits:

Disconnect the tN4 bus wires on one end and connect them together.

•

Disconnect the tN4 bus wires on the other end.

•

Use an electrical meter to measure for continuity.

•

If there is no continuity, there is an open circuit fault along the wires. It is

•

recommended to replace the tN4 bus wires.

Mounting the Thermostat

To place the thermostat back on the mounting base:

Place thermostat bottom tabs on

•

matching mounting base notches. Pivot top of the thermostat

•

towards wall, ensuring wires clear obstructions.

The top clasp makes a clicking

•

sound when properly closed.

Pivot Tab

12 34

1234

Mmm YYY

L t # 1234

Meets Class B:

Canadian ICES

Switch Settings:

Setback

Scene

Lock

Not used

Unlock

Oﬀ

Cleaning the Thermostat

The thermostats’s exterior can be cleaned using a damp cloth. Moisten the cloth with water and wring out prior to wiping the control. Do not use solvents or cleaning solutions.

Switch Settings

538

Setback

Oﬀ

Switch Settings:

1234

12 34

Scene

Oﬀ

1001-03

Mmm YYYY

Lot # 12345

Lock

Not used

Meets Class B:

Canadian ICES

FCC Part 15

Not used

Unlock

Switches are set to “On” position from the factory, and do not require changing for most applications.

Sensor

No Power

Use at least 75°C conductors For instructions see brochure

tN41C2R3W

tNt 538

One Stage Heat

Power: 24 V ±10% 50/60 Hz 1.8 VA 56 VA fully loaded Relay: 24 V (ac) 2 A

Switch

Position

OFF

Action

SETBACK

The thermostat follows a programmable setback schedule as a schedule member if available. Requires the installation of a Timer 033 to use this feature.

OFF

The thermostat does not follow a programmable setback schedule.

SCENE

The thermostat responds to changes in the scene (system wide manual overrides). Requires the installation of a User Switch 479 to use this feature.

OFF

The thermostat does not respond to scenes.

LOCK ACCESS LEVEL

Locked to ‘User’ access level. Set to Lock when installation completed.

UNLOCK ACCESS LEVEL

Unlock to allow ‘User’ and “Installer’ access level. Set to Unlock during installation process.

tekmarNet® reset control must also be set to Unlocked (Installer access level).

Not used

User Interface

Display

SECONDARY DISPLAYMAIN DISPLAY

Button Operation

Press the or the button to select the room temperature.

Symbols Description

HEAT

Heat is turned on.

SUN

Operating at the occupied (day) temperature.

MOON

Operating at the unoccupied (night) temperature.

AWAY

Operating at the Away scene temperature.

AIR GROUP

The air group is cooling. Heating can start once the cooling is finished.

LOCK

Locked to ‘User’ access level.

CLOCK

Operating on a programmable schedule.

tekmarNet

Communication is present.

WARNING SYMBOL

Indicates an error is present.

WARM WEATHER SHUT DOWN

The heating system has been shut off for the summer.

and buttons for 2 seconds to go to the next step, OR

system control to Unlock to change Access level to Installer.

SET ROOM HEAT

Set the room heating temperature while in the

event.

Installer

User

SET ROOM HEAT

Set the room heating temperature while in the

Installer

User

event.

SET ROOM HEAT AWAY

Set the room heating temperature while in the Away

Installer

scene.

(21.0°C)

Default = 70°F

(4.5 to 35.0°C)

40 to 95°F

Press

• Press and hold down both the and buttons for 2 seconds to change from one step to the next.

• Release both buttons once the step has been reached.

• Press the or the button to change the setting, if available.

Together

• Press and hold down both the

• After 10 seconds of no button activity, the display goes back to normal operation.

• Note: Set switch setting #3 and tekmarNet

40 to 95°F

Display Range Access Description Set to

Settings (1 of 7)

(18.5°C)

Default = 65°F

(4.5 to 35.0°C)

40 to 95°F

(4.5 to 35.0°C)

(16.5°C)

Default = 62°F

Continued on next page.

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