Tekmar tekmarNet 4 537 User manual

tekmarNet®4 Thermostat 537
Installation & Operation Manual
D537
08/10
Zoning Replaces:01/09
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The tekmarNet®4 Thermostat 537
provides operation for:
One Stage Heat•
Introduction Features
Requires 4 wires (tN4, C, R, W)
Outdoor temperature display
Bright backlight
2 button temperature adjustment
Communication with other
tekmarNet®devices improves
system efficiency and comfort
Schedule member status enables
setback operation
Optimum start
Responds to tekmarNet®Scenes
Cooling Group Member
Freeze protection
Exercising
Zone synchronization
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Benefits
Energy savings
Reduced temperature swings
Compatible with tekmarNet®
Timers, User Switches and
Gateway for additional control
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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
Preparation
tekmar or jeweller screwdriver
Phillips head screwdriver
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Wire Stripper•
Tools Required
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Materials Required
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2, #6 x 1” Wood Screws
18 AWG LVT Solid Wire
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Optional Adapter Plate 007 (for
installation on 2” x 4” gang box)
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Installation
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 ....................................8-11
Sequence of Operation....................12
Heating Operation.......................12
Cooling Group Operation ............13
Schedules ...................................14
Scenes (System Override) ..........14
Troubleshooting ...............................15
Error Messages......................15-16
Frequently Asked Questions .......17
Job Record..................................18
Technical Data.............................19
Limited Warranty and Product
Return Procedure........................20
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.

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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 36-122°F (2-50°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.
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Installation Location
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Removing The Thermostat Base
Push
tab
1Remove thermostat
from base
2
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.
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Mounting The Thermostat Base
Stud
Switch
Box
Thermostat
Base
007 Adaptor
Plate
31/4”
(83 mm)
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.
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Mounted on switch box

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If a switch box was not used, mount the
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 to the wall. At least one of the
screws should enter a wall stud or similar
rigid material.
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Stud
23/8”
(60 mm)
screwhole
23/8”
(60 mm)
screwhole
Thermostat
Base
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.
12 34
tN4 Wiring Center
or
tN4 Zone Mana
g
er tN4 C W
R
1234
tNt 537
537
One Stage Heat
Made in
Canada
Mmm YYYY Lot 12345
Meets Class B: Canadian ICES FCC Part 15
Power: 24 V ±10% 50/60 Hz 1.8 VA
56 VA fully loaded
Relay: 24 V (ac) 2 A
1001-02
tN4
1C 2R 3W 4
Switch Settings:
For instructions see brochure
Use at least 75°C conductors
Setback Scene
None
ON
Cool Member 1
Off
Off
LockUnlock
Testing the Thermostat Wiring
Testing the Power
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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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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.
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Pivot
Tab
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 tekmarNet®4 Bus
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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.
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Switch Settings
Switches are set to “On”
position from the factory, and
do not require changing for
most applications.
12 34
1234
tNt 537
537
One Stage Heat
Made in
Canada
Mmm YYYY Lot 12345
Meets Class B: Canadian ICES FCC Part 15
Power: 24 V ±10% 50/60 Hz 1.8 VA
56 VA fully loaded
Relay: 24 V (ac) 2 A
1001-02
tN4
1C 2R 3W 4
Switch Settings:
For instructions see brochure
Use at least 75°C conductors
Setback Scene
None
ON
Cool Member 1
Off
Off
LockUnlock
12 34
1234
M
Meets Class B:
Switch Settings:
Setback Scene
None
ON
Cool Member 1
Off
Off
LockUnlock
Switch Position Action
1
ON
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 OFF
The thermostat does not follow a programmable setback
schedule.
2
ON
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 OFF
The thermostat does not respond to scenes.
3
ON NONE
The thermostat is not part of a cooling group.
OFF COOL MEMBER 1
The thermostat joins as a member to cooling group 1.
4
ON LOCK ACCESS LEVEL
Locked to ‘User’ access level. Set to Lock when installation
completed.
OFF
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).
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.
Cleaning the Thermostat

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SECONDARY DISPLAYMAIN DISPLAY
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.
COOL GROUP
The cooling 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.
Display
Symbols Description
User Interface
Button Operation
Press the or the button to select the room temperature.

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Settings (1 of 4)
Display Range Access Description Set to
40 to 95°F
(4.5 to 35.0°C)
Default = 70°F
(21.0°C)
Installer User
SET ROOM HEAT Set the room heating temperature while in the event.
40 to 95°F
(4.5 to 35.0°C)
Default = 65°F
(18.5°C)
Installer User
SET ROOM HEAT Set the room heating temperature while in the event.
40 to 95°F
(4.5 to 35.0°C)
Default = 62°F
(16.5°C)
Installer SET ROOM HEAT AWAY
Set the room heating temperature while in the Away scene.
Continued on next page.
• 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. • Press and hold down both the and buttons for 2 seconds to go to the next step, OR • After 10 seconds of no button activity, the display goes back to normal operation. • Note: Set switch setting #4 and tekmarNet®system control to Unlock to change Access level to Installer.
Press
+
Together

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Settings (2 of 4)
Display Range Access Description Set to
Off, 30 sec, On,
On +
Default = 30 sec
Installer User
BACKLIGHT Select the backlight operation. Off = Permanently Off 30 = Temporary on for 30 seconds On = Permanently On On + = On during and off during
°F or °C
Default = °F
Installer User
TEMPERATURE UNITS Press the or the button to change from °F to °C and vice versa.
Device Type with
Software Version,
Address
Installer User
DEVICE TYPE Display alternates between the Device Type (large number) with Software Version (upper right corner) and the thermostat address.
40 to 95°F
(4.5 to 35.0°C)
Default = 85°F
(29.5°C)
Installer MAXIMUM SET ROOM HEAT
Set the maximum room heating limit while in the event.
Continued on next page.

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Display Range Access Description Set to
40 to 95°F
(4.5 to 35.0°C)
Default = 85°F
(29.5°C)
Installer MAXIMUM SET ROOM HEAT
Set the maximum room heating limit while in the event.
40 to 95°F
(4.5 to 35.0°C)
Default = 45°F
(7.0°C)
Installer MINIMUM SET ROOM HEAT
Set the minimum room heating limit.
1, 2, 3, 4
Default = 1 Installer
SCHEDULE Thermostat can follow schedule master 1, 2, 3, or 4. Available when:
Switch setting 1 is set to Setback (On Position).•
Auto,
SYn(Synchronize)
Default =
Synchronize
Installer
HEAT CYCLES PER HOUR Select either Auto cycle or Synchronize with other thermostats on the tekmarNet®system. Choose Synchronize when zone heated using a boiler. Choose Auto when zone is non-hydronic heating. Available when:
No reset control on the tekmarNet®system.•
Settings (3 of 4)
Continued on next page.