Tekmar 518 User manual

D - 06/16

518

06/16

Zoning

Replaces: 03/13

The Thermostat 518 accurately controls the room temperature for a hydronic

heating zone using Pulse Width Modulation (PWM) technology. Simple up and

down buttons and a display with large type make this thermostat easy to read and

use. The 518 automatically detects a single auxiliary sensor to measure either

outdoor, floor or remote room temperature. This easy to install thermostat is a

direct replacement for tekmar Thermostats 507 and 508.

Introduction

Energy Saving Features

• Away Input

• Auto Heating Cycle

Additional Features

• Radiant Floor Heating

• Pulse Width Modulation

• Auxiliary Sensor Input

• Outdoor & Floor Temperature

Display

• Backlight

• Freeze Protection

Thermostat 518

Installation & Operation Manual

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Table of Contents

Important Safety Information ..........2

Installation ...........................................3

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

Removing The Thermostat Base ....3

Mounting The Thermostat ...............4

Thermostat Wiring ..........................5

Testing the Thermostat Wiring ........6

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

Home Screen ..................................7

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

Sequence of Operation ........................8

Heating Operation ...........................8

Programmable Settings .......................9

Troubleshooting .................................10

Error Messages ............................10

Frequently Asked Questions .........11

Technical Data ..............................11

Limited Warranty and Product

Return Procedure .........................12

Important Safety Information

This is a safety-alert symbol. The safety alert symbol is shown alone

or used with a signal word (DANGER, WARNING, or CAUTION), a

pictorial and/or a safety message to identify hazards.

When you see this symbol alone or with a signal word on your

equipment or in this Manual, be alert to the potential for death or

serious personal injury.

This pictorial alerts you to electricity, electrocution, and shock hazards.

This symbol identifies hazards which, if not avoided, could result in

death or serious injury.

This symbol identifies hazards which, if not avoided, could result in

minor or moderate injury.

This symbol identifies practices, actions, or failure to act which could

result in property damage or damage to the equipment.

Read Manual and all product labels BEFORE using the

equipment. Do not use unless you know the safe and proper

operation of this equipment. Keep this Manual available

for easy access by all users. Replacement Manuals are

available at tekmarControls.com

Do not attempt to service the thermostat. There are no user serviceable parts inside

the thermostat. Attempting to do so voids warranty.

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Preparation

Installation

• tekmar or jeweller screwdriver

• Phillips head screwdriver

• Wire Stripper

Tools Required

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

Materials Required

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

• 18 AWG LVT Solid Wire (Low Voltage Connections)

Removing The Thermostat Base

To remove the thermostat base:

• Locate the tab on the bottom of the

thermostat.

• Push the tab with either your thumb or with

a screwdriver.

• Lift the thermostat front away from the

thermostat’s base.

•

It is the installer's responsibility to ensure that this thermostat is safely installed

according to all applicable codes and standards.

•

Improper installation and operation of this thermostat could result in damage to the

equipment and possibly even personal injury or death.

•

This thermostat 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.

Choose the placement of the thermostats early in the construction process to

enable proper wiring during rough-in.

Installation Location

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

Consider the following:

• Interior Wall.

• Keep dry. Avoid potential leakage onto the control.

• Relative Humidity less than 90%. 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 8 conductor, 18 AWG wire.

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Mounting The Thermostat

Wall

Thermostat

Front

Thermostat

Base

If mounting directly to the wall:

• Drill holes using a 3/16" drill bit and install the wall anchors.

• Feed the wiring through the large hole in the thermostat base.

• Fasten the thermostat base to the wall using the wood screws to the wall anchors.

• Terminate wiring to the wiring strip. Do not over tighten wiring screws. Hand

tighten only.

• Push the thermostat front onto the thermostat base.

3 1/4”

(83 mm)

Stud

Gang

Box

Thermostat

Front

Thermostat

Base

Adapter Plate 012

If a single gang box is used:

• Adapter Plate 012 is required (sold separately).

• Feed the wiring through the hole in the adaptor plate and the thermostat base.

• Fasten the adaptor plate to the gang box.

• Fasten the base of the thermostat to the adaptor plate.

• Terminate wiring to the wiring strip. Do not over tighten wiring screws. Hand

tighten only.

• Push the thermostat front onto the thermostat base.

To prevent the risk of personal injury and/or death, make sure power is

not applied to the thermostat until it is fully installed and ready for final

testing. All work must be done with power to the circuit being worked

on turned off.

Please be aware local codes may require this thermostat to be installed

or connected by an electrician.

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Thermostat Wiring

Zone Valve

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

Wiring Center 315 or 316

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

Relay 003

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

518RRh W1 S1 Com

No Power

518RRh W1 S1 Com

No Power

518RRh W1 S1 Com Away

No Power

Zone

Valve

24 V (ac)

Transformer

009

L N

R C

Optional

Slab Sensor 079

518RRh W1 S1 Com

No Power

518RRh W1 S1 Com

No Power

tN4 CW

518RRh W1 S1 Com

No Power

518RRh W1 S1 Com Away

No Power

Optional

Slab Sensor 079

Wiring Center

315 or 316

Install field

jumper wire

R to Rh

518RRh W1 S1 Com

No Power

518RRh W1 S1 Com

No Power

518RRh W1 S1 Com Away

No Power

115 V (ac)

Optional

Slab Sensor 079

Relay 003

Transformer

009

Install field

jumper wire

R to Rh

Install field

jumper wire

R to Rh

Do not over

tighten wiring

screws. Hand

tighten only.

Do not over

tighten wiring

screws. Hand

tighten only.

Do not over

tighten wiring

screws. Hand

tighten only.

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Switching Relay

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

Testing the Thermostat Wiring

Testing the Power

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

If the thermostat display turns on, this indicates that the thermostat is operating correctly

and there are no electrical issues. In the event that the display is permanently off:

1. Remove the thermostat front.

2. Use an electrical meter to measure voltage between the R and C wiring terminals.

For AC power supplies the voltage should measure between 10 to 30 V (ac). For

DC power supplies the voltage should measure between 10 to 30 V (dc).

3. If the voltage on the R and C wire terminations is continuous and the thermostat

display is not on, the thermostat may have a fault. Contact your tekmar sales

representative for assistance.

If the thermostat display intially powers on but later shuts off intermittantly, there

may be a short circuit from the W wire to ground, or the power supply is too small to

power the load.

Testing the Heat Zone Output Wiring

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

1. Touch the

button and set the heating temperature above the current room

temperature. Make sure the display does not flash “Max” if using a floor sensor.

2. When the “Heat On” symbol appears on the display, use an electrical meter to check

for voltage on the W and C wires connected to the zone valve, wiring center, relay

or switching relay. The electrical meter should read 10 to 30 V (ac) or (dc).

3. If the W and C wire have voltage, check the zone valve, wiring center, relay or pump

to determine if the heat device is operating correctly.

Thermostat Wiring

518RRh W1 S1 Com

No Power

24 V

HNXX HNHN NH

Com Switching Relay

Zone 1 Zone 2 Zone 3

Class 2

Transformer

Zone 1 Zone 2 Zone 3

518RRh W1 S1 Com

No Power

518RRh W1 S1 Com Away

No Power

Optional

Slab Sensor 079

Pump

Do not over

tighten wiring

screws. Hand

tighten only.

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HEAT ON

Heat is turned on.

MODE OFF

The heating system is off.

WARNING SYMBOL

Indicates an error is present.

MIN

The floor is at or below the

floor minimum temperature.

MAX

The floor has reached the

floor maximum temperature.

AWAY

Operating at the away

temperature.

Home Screen

Symbols Description

User Interface

Away

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Heating Operation

Sequence of Operation

Push the

button to select a preferred temperature setting. The Heat On symbol

is shown on the display when the thermostat is heating. The heat can cycle on and off

within +/- 1.5°F (1°C) of the temperature setting.

The floor and air heating can be shut off by holding the

button until Set Room is Off.

To resume heating when the Mode is Off, press the

button to navigate to the Mode

setting, then press the

button to select Mode Heat. The thermostat will resume

heating at the last previously set temperature.

The away feature saves energy by heating to a lower temperature while you are away.

To activate Away, short the Away and Com wiring terminals together.

Air Temperature Only

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

If there is only an air temperature sensor (no floor sensor), the thermostat operates to

control your desired air temperature.

Floor Temperature Only

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

If the air sensor has been disabled, the thermostat will only maintain floor temperature

and ignore air temperature. This operation is recommended for areas such as bathrooms

to ensure that tile floors are warm to the touch.

Floor and Air Temperature

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

If the air sensor is turned on and a floor sensor is connected, the thermostat will maintain

the desired air temperature as well as a minimum floor temperature.

This operation is recommended for areas with large windows that allow the sun to

shine into a room and keep it warm without the need for heat. This can allow the floors

to cool off during the afternoon. When the sun goes down, it can take a long time for

the floors to get warm again. This may cause the room to cool off too much in the early

evening. A floor minimum setting can help with this condition by maintaining a floor

minimum temperature. Keep in mind the floor minimum temperature will override the

air temperature, and if set too high, may overheat the room.

This operation is also recommended for rooms with hardwood floors. Setting floor

minimum and maximum temperatures is a way of enhancing the comfort of the living

space while protecting floor coverings.

90°F (32°C)

Feels hot to the touch

80 to 85°F (26 to 30°C)

Feels warm to the touch

70°F (21°C)

Feels cool to the touch

40 to 45°F (5 to 7°C)

Feels cold to the touch

Suggested maximum for all floor

types other than wood.

Bathrooms and kitchens. Suggested

maximum for wood floors.

Rooms with large windows preventing

under heating in the evening.

Freeze protection for garages.

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Programmable Settings

Setting Display

User settings. Press the

and

buttons together for 3 seconds to enter and

advance to the next setting.

MODE Select heat or off.

Range: HEAT, OFF

Default: HEAT

UNITS Select the temperature units.

Range: °F or °C

Default: °F

LIGHT Select when the display back light should operate. Auto

operates the backlight for 30 seconds after a keystroke.

Range: OFF, AUTO, ON

Default: AUTO

SET FLOOR Set the floor minimum temperature. Available

when an auxiliary floor sensor is connected and the built-in

room sensor is on.

Range: OFF, 40 to 122°F (4.5 to 50.0°C)

Default: 72°F (22.0°C)

TYPE Device Type number. Hold the

button to view the

software version.

ESCAPE Release the

and buttons to return to the

home screen.

Installer settings. Press the

and

buttons together for 5 more seconds.

AUXILIARY SENSOR Select the type of auxiliary sensor.

Available when an auxiliary sensor is automatically

detected.

Range: NONE = no auxiliary sensor, ROOM = Indoor

Sensor, FLOR = Slab Sensor, OUT = Outdoor Sensor

Default: OFF

ROOM SENSOR Select if the built-in room temperature sensor

is on or off. The built-in room sensor can only be disabled

when an auxiliary room or slab sensor is connected.

Room

Range: ON or OFF

Default: ON

SET FLOOR MAXIMUM Set the floor maximum temperature

in order to protect the floor covering. Suggested settings:

Tile = 90°F (32°C), Wood Floor = 85°F (29°C)

MAX

Range: 40 to 122°F (4.5 to 50.0°C), OFF

Default: 85°F (29.5°C)

SET AWAY Set the away temperature. F

Range: OFF, 40 to 122°F (4.5 to 35.0°C)

Default: 50°F (10.0°C)

ESCAPE Release the

and buttons to return to the

home screen.

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Error Message Description

SETUP MENU SAVE ERROR

The thermostat failed to read the Programmable Settings from memory

and has reloaded the factory default settings. The thermostat stops

normal operation until all Programmable Settings are checked except

to provide freeze protection.

Room

ROOM SENSOR OPEN CIRCUIT ERROR

The built-in air temperature sensor has an open circuit fault. Do not

confuse this error with the auxiliary room sensor short circuit error.

This error cannot be field repaired. Contact your wholesaler or tekmar

sales representative for details on repair procedures.

Room

ROOM SENSOR SHORT CIRCUIT ERROR

The built-in air temperature sensor has a short circuit fault. Do not

confuse this error with the auxiliary room sensor short circuit error.

This error cannot be field repaired. Contact your wholesaler or tekmar

sales representative for details on repair procedures.

AUXILIARY SENSOR OPEN CIRCUIT ERROR

The auxiliary sensor has an open circuit. Check for loose or damaged

wires. Locate and repair the problem as described in the sensor

Installation & Operation Manual (070_D, 079_D). The error clears

once the auxiliary sensor fault is corrected. If the auxiliary sensor

was intentionally removed, power the thermostat down and up to

clear the error.

AUXILIARY SENSOR SHORT CIRCUIT ERROR

The auxiliary sensor has a short circuit. Check for damaged wires.

Locate and repair the problem as described in the sensor Installation

& Operation Manual (070_D, 079_D). The error clears after the

auxiliary sensor fault is corrected.

Troubleshooting

Error Messages

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