Tekmar 538 User manual

Zoning

U538

08/10

User Manual

tekmarNet®4 Thermostat 538

Congratulations on the purchase of your

tekmarNet®Thermostat! This product contains

the most advanced HVAC control technology

in order to ensure that your heating system

runs more efficiently and provides you with

the highest level of comfort.

Replaces: 03/09

This brochure will provide you with the information you need to benefit the most

from your tekmarNet®thermostat. Please visit www.tekmarcontrols.com for more

detailed information on this or any other tekmar product.

This thermostat provides heating for one zone in your building. It will maintain your

air temperature with an on board ROOM sensor, but may also have an auxiliary

ROOM, FLOOR, or OUTDOOR sensor attached. A ROOM sensor will allow control

of a location other than the one in which the thermostat is installed. An outdoor

sensor will allow this and all other tekmarNet®thermostats in your building to display

the outdoor temperature on their displays. A floor sensor will allow this thermostat

to control your floor temperature. This thermostat can maintain floor temperature

only, air temperature only, or floor and air temperature together.

With the addition of one of tekmar’s energy saving accessories, this thermostat can

also lower its temperature setting at night or when you are away from the house.

Temperature Adjustment

Adjustment Buttons

Adjust the temperature

ROOM or FLOOR

displays depending

on configuration

Indicates

whether the day

or night

temperature is

being set

(if available).

You will be adjusting the temperature of the current operating mode. To adjust

temperature settings that are not shown on the screen, you must enter into the

Adjust Menu as described in the “Adjust Menu” section. There may be other symbols

on the screen that affect thermostat operation. Please see the “Display Symbols”

section for a description of each symbol.

This thermostat can operate at day or night temperatures (see “Day or

Night Temperatures” section) for ROOM or FLOOR settings. The temperature

can be adjusted as follows:

Step 1: Press the or button until the desired temperature is displayed.

Step 2: Release all buttons and wait for the display to return to normal operation.

The adjusted settings will be saved in memory.

Adjust Menu

This thermostat has an Adjust Menu that allows adjustment of all of its settings. The

following items can be adjusted or viewed:

Step 1: Press and hold the and buttons until the desired setting is shown

(a new screen will appear every 2 seconds).

Step 2: Press the or button to adjust the temperature setting.

Step 3:

Press and hold the and buttons again to advance to the next

adjustable setting. Repeat steps 1 and 2 until all adjustments have

been made.

Step 4: Release all buttons and wait for the display to return to normal operation.

The adjusted settings will be saved in memory.

Day and night temperatures (if available)

Floor temperatures

Backlight on-time

Temperature units °F or °C

Thermostat type (view only)

•

The Adjust Menu can be accessed as follows:

This thermostat has access levels. It will typically be installed and programmed

by a heating professional and then locked in a “User” access level. System critical

settings will not be available for adjustment. For more information on these settings,

please consult your installing contractor or this product’s Installation and Operation

Manual. The following pages describe the settings available to the “User”.

Indicates setting

is in the Adjust menu

Indicates the

name of the

setting being

adjusted

Press and Hold

and together

Indicates

whether the day

or night

temperature is

being set

(if available).

This thermostat is capable of running at a lower temperature setting when you are

asleep or out of the building. An energy saving accessory can be added to your

tekmarNet®system in order to activate these energy saving setback temperatures.

If one is connected, day and night temperature settings will be available. They

are adjusted as follows:

479 User Switch

With the touch of a button,

tell every thermostat in

your house to operate at

their night setback or

Away temperature.

033 Timer

Program a night

setback schedule for

all of your thermostats

with one device.

tekmarNet®Energy Saving Accessories

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

Examples of these settings are as follows:

Mode of Operation day night

ROOM example: 70°F (21°C) 65°F (18°C)

FLOOR MINIMUM example: 72°F (22°C) OFF

Note: The presence of a schedule is indicated by the clock symbol.

Step 1: Press and hold the and buttons to enter the Adjust Menu, and

wait until the desired setting is shown with the day symbol on the

screen (a new setting will appear every 2 seconds).

Step 2: Press the or button to adjust the temperature setting.

Step 3: Press and hold the and buttons until the same setting is shown

with the night symbol on the screen.

Step 4: Press the or button to adjust the temperature setting.

Step 5: Release all buttons and wait for the display to return to normal operation.

The adjusted settings will be saved in memory.

Day or Night

Setting

Press and

Hold and

together

Day and Night Temperatures

If your thermostat has a floor sensor connected to it, floor temperature can be

maintained. This allows you to have warm floors even during milder times of the year

when the air temperature is warm enough or when your air conditioning is on.

Floor temperature can be maintained in two ways. Air temperature can be ignored

and the thermostat will maintain Floor Temperature Only. Or, air temperature can be

considered and the thermostat will maintain Floor and Air Temperatures together.

Floor Temperature Only

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

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

and ignore air temperature. In this mode, the desired floor temperature can be

adjusted as described in the “Temperature Adjustment” section.

Floor and Air Temperature

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

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

will maintain your desired air temperature as well as a minimum floor temperature.

However, the floor minimum temperature will override the air temperature, and if set

too high, may overheat the room. The FLOOR MINIMUM temperature is adjusted

through the Adjust Menu as follows:

Floor Temperatures

Step 1: Press and hold the and buttons to enter the Adjust Menu, and

wait until the FLOOR MIN setting is shown as well as the desired day

or night symbol (a new screen will appear every 2 seconds).

Step 2: Press the or button to adjust the temperature setting.

Step 3: Release all buttons and wait for the display to return to normal operation.

The adjusted settings will be saved in memory.

Day or Night

Setting

Press and

Hold and

together

Floor Temperature Settings

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

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

underheating in the evening.

Freeze protection for garages.

Wood Floors

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

Rapidly changing or excessively high temperatures can cause damage to wood

flooring. Ask your heating professional about setting the floor maximum if your

flooring is a type that can be damaged by heat.

Setting a floor temperature is a way of enhancing the comfort of your living space.

Radiant floors heat the air by raising the floor temperature. During milder times of

the year when the air temperature is warm enough without the need for heating,

floors can cool off. A floor minimum setting can ensure that the floors stay warm

during these periods, or even in the summer when the air conditioning is on.

Sun shining into a room can keep it warm without the need for heat. This can allow

the floors to cool off. And when the sun goes down, it can sometimes 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.

The following are some typical floor temperature settings that have been used with

tekmar thermostats.

NOTE: Setting a floor temperature that is too high can damage floors or make the

room uncomfortably warm. If a FLOOR MIN is set, the thermostat will maintain the

floor at this temperature regardless of the air temperature. And the air temperature

may exceed that to which it is set.

Changing the Backlight

Press and

Hold and

together.

Step 1:

Press and hold the and buttons to enter the Adjust Menu, and

wait until this screen appears (a new screen will appear every 2

seconds).

Step 2: Press the or button to adjust the backlight operation.

Step 3: Release all buttons and wait for the display to return to normal operation.

The adjusted setting will be saved in memory.

This thermostat has an LED backlight that can be configured as follows:

Off Permanently Off.

30 Temporary on for 30 seconds (when a button is pressed)

On Permanently On

On + On during and off during

Changing the Units (°F or °C)

This thermostat can display temperatures in °F or °C.

Press and

Hold and

together.

Step 1:

Press and hold the and buttons to enter the Adjust Menu, and

wait until this screen appears (a new screen will appear every 2

seconds).

Step 2: Press the or button to adjust the units.

Step 3: Release all buttons and wait for the display to return to normal operation.

The adjusted setting will be saved in memory.

Schedule Symbols

These symbols appear when a Schedule Master or User Switch is connected to the

system. Those devices will tell this thermostat what temperature setting to operate

at (day , night , or ). Refer to the “Day and Night Temperatures”

section for more information.

A Schedule Master is present in the system and this thermostat is

following that Master’s programmable schedule.

Operating at the Day temperature. If there is no Schedule Master or User

Switch in the system, the thermostat will always be in this mode.

Operating at the Night temperature. A setback enabling accessory or

Schedule Master thermostat has enabled setback.

Operating at the Away temperature. If flashing, the temperature

cannot be adjusted by pressing the up or down arrows. Consult the

Installation and Operation Manual for this product for more information

on this feature.

If flashing, the system is in Warm Weather Shut Down. The outdoor

temperature is above the WWSD setting. No heating will take place

while in WWSD. However, if a floor sensor is attached and a minimum

floor temperature is set, it will be maintained.

Display Symbols

In addition to the features described in this manual, there may be others operating

in the background. Among others, this thermostat will display symbols on its screen

in order to indicate what mode it is in, what temperature it is operating at, or what

equipment it is trying to turn on. This section describes each of those symbols.

Communication Symbols

These symbols appear when this thermostat is part of a network and/or when

there is something wrong in the system.

The thermostat is part of a network and is communicating with other

devices in the network.

There is something wrong with the thermostat or the tekmarNet®system.

This usually occurs if a control component has failed or is set up incorrectly.

Contact your installing contractor for more information or consult the

Installation and Operation Manual for this product.

Equipment Operating Symbols

These symbols indicate the current status of the system.

Heating is turned on.

The thermostat is part of a Cooling Group (a group of heating zones

within a commonly ducted air-conditioning system) and the air-conditioning

within that group is on. This thermostat will be locked out of heating when

this symbol is displayed, which will save energy.

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