Tekmar 521 Bedienungsanleitung

Programmable Thermostat 521

Installation & Operation Manual

521

12/20

Zoning

Replaces: 01/14

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A Watts Water Technologies Company

The Programmable Thermostat 521 is

designed for three different modes of

operation: single stage heating, two stages

of heating with a fan, or one stage of

heating and one stage of cooling with

a fan. Two auxiliary sensors may be

added to measure the floor, outdoor or

room temperature. A Slab Sensor 079 is

included to measure floor temperature to

protect the floor from overheating and

enhance comfort. The programmable

schedule supports either a 7 day or 24

hour schedule with 2 or 4 events per day.

A permanent temperature hold button

overrides the programmable schedule.

An optional Adaptor Plate 012 is available

to allow the thermostat to mount onto a

single gang electrical box.

Introduction

Energy Saving Features

• 7 Day Programmable Schedule

Additional Features

• Optimum Start

• Permanent Temperature Hold

• Radiant Floor Heating

• Two Stage Heating

• Cooling

• Fan

• Backlight

• Outdoor and Floor Temperature

Display

• Time Clock

• Four Hour Battery-free Clock

Backup

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A Watts Water Technologies Company

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.

Getting Started

Table of Contents

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

Important Safety Information ...............3

Installation ...........................................4

Preparation .....................................4

Removing The Thermostat Base ....4

Mounting The Thermostat ...............5

Slab Sensor 079 Installation ...........6

Slab Sensor 079 Wiring .................7

Slab Sensor 079 Testing .................8

Temperature vs. Resistance Table ... 8

Thermostat Wiring .....................9 -11

Testing the Thermostat Wiring ......12

Switch Settings ..................................13

User Interface ....................................14

Home Screen ................................14

Symbols Description .....................14

Programmable Settings .....................15

Fan Menu ......................................15

Set Temp Menu .............................16

Time Menu ....................................17

Schedule Menu ........................18-19

Setup Menu ............................. 20-21

Sequence of Operation ......................22

Mode Button Operation ................22

Heating Operation .........................22

Cooling Operation .........................23

Fan Operation ...............................23

Time Clock ....................................24

Programmable Schedule ..............24

Optimum Start ...............................25

Temperature Adjustment...............25

Access Levels ...............................25

Troubleshooting .................................26

Error Messages ............................26

Frequently Asked Questions .........27

Technical Data ..............................27

Limited Warranty and Product

Return Procedure .........................28

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A Watts Water Technologies Company

To avoid serious personal injury and damage to the equipment:

Important Safety Information

It is your responsibility to ensure that this control is safely installed

according to all applicable codes and standards. tekmar is not responsible

for damages resulting from improper installation and/or maintenance.

•

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

• Disconnect all power before opening the control.

•

It is the installers responsibility to ensure that this control is safely installed according

to all applicable codes and standards.

•

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

equipment and possibly even personal injury or death.

•

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.

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

the control. Attempting to do so voids warranty.

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A Watts Water Technologies Company

Preparation

Installation

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 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 5 conductor, 18 AWG wire.

Installation Location

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

• 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.

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A Watts Water Technologies Company

Mounting The Thermostat

If mounting directly to the wall:

• Drill holes 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.

• Push the thermostat front onto the thermostat base.

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.

• Push the thermostat front onto the thermostat base.

Wall

Thermostat

Front

Thermostat

Base

3 1/4"

(83 mm)

Stud

Gang

Box

Thermostat

Front

Thermostat

Base

Adapter Plate 012

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A Watts Water Technologies Company

Thick Floor Coverings (greater than 3/8" (10 mm))

If a thick floor covering is to be installed directly to the subfloor, a groove 1/8" (4 mm) wide

by 1/16" (2 mm) deep can be cut into the back of the flooring material to accommodate

the wire for the sensor. Ensure that the sensor is located in such a position that the

attached wire is able to reach to a suitable junction location.

Splices under the floor covering should be avoided

to ensure trouble free operation. A groove 3/16"

(5 mm) wide by 3/16" (5 mm) deep by 1-3/4" (45

mm) long should be cut to accommodate the

sensor. The sensor should be located mid way

between the heating elements to ensure a proper

temperature reading.

If it is not practical to cut a groove in the surface

covering, follow the installation method used for

thin floor coverings.

Slab Sensor 079 Installation

Thin-Set or Thin-Pour Applications

If the floor covering is to be installed over either a thin-set or thin-pour material of sufficient

depth, the 079 slab sensor can be placed directly into either the thin-set material or the

thin-pour material and covered over. Ensure

that the sensor is located in such a position that

the attached wire is able to reach to a suitable

junction location. Splices within the thin-set or

thin-pour should be avoided to ensure trouble

free operation. The sensor should be located

mid way between the heating elements to ensure

a proper temperature reading.

Tiles

Thin-set

Electric

Cables

Thin Floor Coverings (less than 3/8" (10 mm))

If a thin floor covering is to be installed directly to the subfloor, a groove 1/8" (4 mm)

wide by 1/16" (2 mm) deep can be cut into the surface of the subfloor to accommodate

the wire for the sensor. Ensure that the sensor is located in such a position that the

attached wire is able to reach to a suitable junction

location. Splices under the floor covering should

be avoided to ensure trouble free operation.

A groove 3/16" (5 mm) wide by 3/16" (5 mm)

deep by 1-3/4" (45 mm) long should be cut to

accommodate the sensor. The sensor should be

located mid way between the heating elements to

ensure a proper temperature reading.

Hardwood

Subfloor

Hardwood

Subfloor

New Installations

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

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A Watts Water Technologies Company

Tile Floor Coverings

If a Slab Sensor 079 is to be installed into an existing tile floor with sufficiently large

grout lines, the sensor and wire can be installed in one of the grout lines between the

tiles. Select a low traffic area of the floor that is mid way between the heating elements

for the sensor location. Ensure that the sensor is located in such a position that the

attached wire is able to reach to a suitable junction location. Splices within the grout

should be avoided to ensure trouble free operation. Remove the appropriate grout line

and place the sensor and wire in the floor. Re-grout the area.

Installing the Sensor to the Bottom of a Subfloor

If the sensor is to be installed to the bottom of a subfloor, cut a piece of 1" (25 mm)

thick rigid insulation into a 6" (150 mm) by 6" (150 mm) square. A groove 3/16" (5 mm)

wide by 3/16" (5 mm) deep by 1-3/4" (45 mm) long should be cut into the insulation to

accommodate the sensor. Place the sensor in the groove and sandwich the sensor

between the insulation and the subfloor. Use a suitable fastening method to affix the

insulation to the subfloor.

Retrofit Installations

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

The Slab Sensor 079 is supplied with 10' (3 m) of cable. If a longer length is

required, 24 AWG or larger wire can be spliced onto the two wires from the sensor.

The splices should be properly soldered and protected in an accessible junction

box. Follow the sensor testing instructions given in this brochure and then connect

the wires to the control.

Slab Sensor 079 Wiring

Do not run sensor wires parallel to telephone or power cables. If the sensor

wires are located in an area with strong sources of electromagnetic interference,

shielded cable or twisted pair should be used or the wires can be run in a grounded

metal conduit.

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A Watts Water Technologies Company

Slab Sensor 079 Testing

A good quality test meter capable of measuring up to 5,000 kΩ (1 kΩ = 1000Ω) is

required to measure the sensor resistance. In addition to this, the actual temperature

must be measured with either a good quality digital thermometer, or if a thermometer

is not available, a second sensor can be placed alongside the one to be tested and

the readings compared.

First measure the room temperature using the thermometer. Disconnect the S1 or S2

and Com wires from the thermostat. Using an electrical meter, measure the resistance

of the S1 or S2 and Com wires at the thermostat location. Using the temperature

versus resistance table, estimate the temperature measured by the sensor. The sensor

measurement and thermometer readings should be close. If the test meter reads a very

high resistance, there may be a broken wire, a poor wiring connection or a defective

sensor. If the resistance is very low, the wiring may be shorted, there may be moisture

in the sensor or the sensor may be defective. To test for a defective sensor, measure

the resistance directly at the sensor location. Once the test has been completed,

reconnect the S1 or S2 and Com wires to the thermostat.

Do not apply voltage to the temperature sensor terminals at any time as damage to

the sensor may result.

Temperature vs. Resistance Table

Temperature Resistance

°F °C

-50 -46 490,813

-45 -43 405,710

-40 -40 336,606

-35 -37 280,279

-30 -34 234,196

-25 -32 196,358

-20 -29 165,180

-15 -26 139,402

-10 -23 118,018

-5 -21 100,221

0-18 85,362

5-15 72,918

10 -12 62,465

15 -9 53,658

20 -7 46,218

Temperature Resistance

°F °C

25 -4 39,913

30 -1 34,558

35 2 29,996

40 4 26,099

45 7 22,763

50 10 19,900

55 13 17,436

60 16 15,311

65 18 13,474

70 21 11,883

75 24 10,501

80 27 9,299

85 29 8,250

90 32 7,334

95 35 6,532

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A Watts Water Technologies Company

Temperature vs. Resistance Table - Continued

Temperature Resistance

°F °C

100 38 5,828

105 41 5,210

110 43 4,665

115 46 4,184

120 49 3,760

125 52 3,383

130 54 3,050

135 57 2,754

140 60 2,490

145 63 2,255

150 66 2,045

155 68 1,857

160 71 1,689

Temperature Resistance

°F °C

165 74 1,538

170 77 1,403

175 79 1,281

180 82 1,172

185 85 1,073

190 88 983

195 91 903

200 93 829

205 96 763

210 99 703

215 102 648

220 104 598

225 107 553

Thermostat Wiring

Zone Valve

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

Y/W2

Rc GGRh W1 S1 S2Com

No Power

Zone

Valve

Boiler

Transformer

Field Jumper Required:

R to Rh

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A Watts Water Technologies Company

Wiring Center 315 or 316

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

Relay 003

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

Switching Relay

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

T T

Y/W2

Rc GGRh W1 S1 S2Com

No Power

Thermostat Wiring

Boiler

Relay

003

Pump

Transformer

tN4 CW

Y/W2

Rc GGRh W1 S1 S2Com

No Power

Wiring Center

Y/W2

Rc GGRh W1 S1 S2Com

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

Pump

N L

Field Jumper Required:

R to Rh

Field Jumper Required:

R to Rh

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