PDF User Manual

  1. Home
  2. Manuals
  3. Tekmar 518 Installation And Operation Manual

Tekmar 518 Installation And Operation Manual

Made by: Tekmar
Type: Installation And Operation Manual
Category: Thermostat
Pages: 12
Size: 0.80 MB

 

Download PDF User Manual



Full Text Searchable PDF User Manual



background image

© 2016 tekmar  518_D - 06/16

518_D

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


background image

2 of 12

© 2016 tekmar  518_D - 06/16

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.


background image

© 2016 tekmar  518_D - 06/16

3 of 12

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.


background image

4 of 12

© 2016 tekmar  518_D - 06/16

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.

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.


background image

© 2016 tekmar  518_D - 06/16

5 of 12

Thermostat Wiring

Zone Valve

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

Wiring Center 315 or 316

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

Relay 003

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

C

518

R

Rh W1 S1

Com

No Power

C

518

R

Rh W1 S1

Com

No Power

C

518

R

Rh W1 S1

Com Away

No Power

Zone 

Valve

24 V (ac)

Transformer

009

L N

R

C

Optional

Slab Sensor 079

C

518

R

Rh W1 S1

Com

No Power

C

518

R

Rh W1 S1

Com

No Power

tN4 C

W

R

C

518

R

Rh W1 S1

Com

No Power

C

518

R

Rh W1 S1

Com Away

No Power

Optional

Slab Sensor 079

Wiring Center

315 or 316

Install field

jumper wire

R to Rh

C

518

R

Rh W1 S1

Com

No Power

R C

2

1

8
7

3

4
5

6

C

518

R

Rh W1 S1

Com

No Power

C

518

R

Rh W1 S1

Com Away

No Power

L

N G

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.


background image

6 of 12

© 2016 tekmar  518_D - 06/16

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

C

518

R

Rh W1 S1

Com

No Power

R

W

24 V

R

W

H

N

X

X

H

N

H

N

N

H

Com

Switching Relay

Zone 1

Zone 2

Zone 3

Class 2

Transformer

R

W

Zone 1 Zone 2

Zone 3

C

518

R

Rh W1 S1

Com

No Power

C

518

R

Rh W1 S1

Com Away

No Power

Optional

Slab Sensor 079

L

N

Pump

Do not over 

tighten wiring 

screws. Hand 

tighten only.


background image

© 2016 tekmar  518_D - 06/16

7 of 12

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


background image

8 of 12

© 2016 tekmar  518_D - 06/16

Heating Operation

Sequence of Operation

Push the   or   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.


background image

© 2016 tekmar  518_D - 06/16

9 of 12

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.

F

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)

F

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.


background image

10 of 12

© 2016 tekmar  518_D - 06/16

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


background image

© 2016 tekmar  518_D - 06/16

11 of 12

Technical Data

Thermostat 518 

One Stage Heat

Literature

518_C, 518_D, 518_Q, 518_U

Control

Microprocessor control. This is not a safety (limit) control

Packaged weight

0.53 lb. (240 g)

Dimensions

3-11/16” H x 3” W x 15/16” D (94 x 76 x 24 mm)

Enclosure

White PVC plastic, NEMA Type 1

Approvals

Meets Class B: ICES & FCC Part 15

Ambient conditions Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% non-condensing

Power supply

10 to 30 V (ac/dc), 50/60 Hz, 1.8 VA standby,

56 VA max fully loaded, Class 2

Relay

30 V  (ac/dc) 2 A, Class 2 circuits

Sensor

NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892

– Included

None

– Optional

tekmar type # 070, 072, 073, 076, 077, 079, 084

Frequently Asked Questions

Symptom

Look for...

Corrective Action

Display powering 

on and off.

Measure voltage at 

wiring terminals R 

and C.

The power supply transformer 

may have limited VA capacity. A 

transformer with a larger VA rating is 

recommended.

Thermostat does 

not heat.

Mode Off

Thermostat must be in Mode Heat in 

order to provide heating.


background image

WARNING:

 This product contains chemicals 

known to the State of California to cause cancer 
and birth defects or other reproductive harm.  

For more information: Watts.com/prop65

518_D - 06/16

 

12 of 12 

© 2016 tekmar

Tel: (250) 545-7749 • Fax: (250) 984-0815

 tekmarControls.com

All specifications are subject to change without notice

Limited Warranty 

The liability of tekmar under this warranty is limited. The Purchaser, by taking receipt 

of any tekmar product (“Product”), acknowledges the terms of the Limited Warranty in effect at the time 

of such Product sale and acknowledges that it has read and understands same.

The tekmar Limited Warranty to the Purchaser on the Products sold hereunder is a manufacturer’s pass-

through warranty which the Purchaser is authorized to pass through to its customers. Under the Limited 

Warranty, each tekmar Product is warranted against defects in workmanship and materials if the Product 

is installed and used in compliance with tekmar’s instructions, ordinary wear and tear excepted. The pass-

through warranty period is for a period of twenty-four (24) months from the production date if the Product is 

not installed during that period, or twelve (12) months from the documented date of installation if installed 

within twenty-four (24) months from the production date.

The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s sole discretion: the cost of parts 

and labor provided by tekmar to repair defects in materials and / or workmanship of the defective product; or to 

the exchange of the defective product for a warranty replacement product; or to the granting of credit limited to 

the original cost of the defective product, and such repair, exchange or credit shall be the sole remedy available 

from tekmar, and, without limiting the foregoing in any way, tekmar is not responsible, in contract, tort or strict 

product liability, for any other losses, costs, expenses, inconveniences, or damages, whether direct, indirect, 

special, secondary, incidental or consequential, arising from ownership or use of the product, or from defects in 

workmanship or materials, including any liability for fundamental breach of contract.

The pass-through Limited Warranty applies only to those defective Products returned to tekmar during the war-

ranty  period.  This  Limited  Warranty  does  not  cover  the  cost  of  the  parts  or  labor  to  remove  or  transport  the 

defective Product, or to reinstall the repaired or replacement Product, all such costs and expenses being subject 

to Purchaser’s agreement and warranty with its customers.

Any representations or warranties about the Products made by Purchaser to its customers which are different from 

or in excess of the tekmar Limited Warranty are the Purchaser’s sole responsibility and obligation. Purchaser shall 

indemnify and hold tekmar harmless from and against any and all claims, liabilities and damages of any kind or 

nature which arise out of or are related to any such representations or warranties by Purchaser to its customers.

The pass-through Limited Warranty does not apply if the returned Product has been damaged by negligence by 

persons other than tekmar, accident, fire, Act of God, abuse or misuse; or has been damaged by modifications, 

alterations  or  attachments  made  subsequent  to  purchase  which  have  not  been  authorized  by  tekmar;  or  if  the 

Product was not installed in compliance with tekmar’s instructions and / or the local codes and ordinances; or if 

due to defective installation of the Product; or if the Product was not used in compliance with tekmar’s instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING 

LAW ALLOWS PARTIES TO CONTRACTUALLY EXCLUDE, INCLUDING, WITHOUT LIMITATION, IMPLIED WAR-

RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURABILITY OR DESCRIP-

TION OF THE PRODUCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS, AND 

ITS COMPLIANCE WITH OR NON-VIOLATION OF ANY APPLICABLE ENVIRONMENTAL, HEALTH OR SAFETY 

LEGISLATION; THE TERM OF ANY OTHER WARRANTY NOT HEREBY CONTRACTUALLY EXCLUDED IS LIM-

ITED SUCH THAT IT SHALL NOT EXTEND BEYOND TWENTY-FOUR (24) MONTHS FROM THE PRODUCTION 

DATE, TO THE EXTENT THAT SUCH LIMITATION IS ALLOWED BY THE GOVERNING LAW. 

Product Warranty Return Procedure

 All Products that are believed to have defects in workmanship or mate-

rials must be returned, together with a written description of the defect, to the tekmar Representative assigned 

to the territory in which such Product is located. If tekmar receives an inquiry from someone other than a tekmar 

Representative, including an inquiry from Purchaser (if not a tekmar Representative) or Purchaser’s customers, 

regarding a potential warranty claim, tekmar’s sole obligation shall be to provide the address and other contact 

information regarding the appropriate Representative.

Limited Warranty and Product Return Procedure