Tekmar 527 User manual

1 of 28 © 2009 D527 - 06/09
D527
06/09
tekmarNet®2 Thermostats 527, 528, 530
Introduction
This Installation and Operation Manual includes detailed wiring instructions, settings and operational features of the
tekmarNet®2 Thermostats 527, 528 and 530. These 2-wire thermostats are part of a complete tekmarNet®system.
Installation & Operation Manual
Features
Thermostat 527
One Stage Heat
Cooling Group Member
Dual Temperature Display
Simple Temperature Adjustment
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Thermostat 528
One Stage Heat
Cooling Group Member
Auxiliary Sensor Input
Floor Minimum & Maximum
Dual Temperature Display
Local Override Button
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Thermostat 530
One-Stage Heat
One Stage Cool
Fan Operation
Cooling Group Master
Dual Temperature Display
Local Override Button
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OUTDOOR
F
HEAT
FLOOR
F
tekmarNet®communications compatibility
Simple 2-wire connectivity
Schedule member
Optimum start
Scenes
Outdoor temperature display
Freeze protection
Cooling groups
Exercising
Zone synchronization
Large LCD with backlight
CSA C US approved for use in USA
and Canada
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Benefits
Energy savings
Reduced temperature swings
Suitable for 2-wire retrofits
Compatible with tekmarNet Timers,
User Switches and Gateway for
additional control options
Interlock to prevent simultaneous
heating & cooling
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Note
tN2 Zone Manager, Expansion Module
Wiring Center or House Control
required for operation
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Table of Contents
Caution.................................................................................3
Definitions...........................................................................3
Electrical Drawings..........................................................3
Powering the Zone Manager.........................................3
Rough-In Wiring................................................................4
Removing the Cover ........................................................4
Mounting the Thermostat...............................................4
Thermostat Displays........................................................5
Symbols Description.......................................................5
527 Thermostat..................................................................6
Wiring......................................................................6
DIP Switch Settings ................................................6
Button Operation.....................................................7
Setting the Temperature..........................................7
User Settings .........................................................8
528 Thermostat..................................................................9
Wiring......................................................................9
DIP Switch Settings ................................................9
Button Operation...................................................10
Setting the Temperature........................................10
User Settings ....................................................... 11
Adjust Menu .........................................................12
530 Thermostat................................................................14
Wiring.................................................................... 14
DIP Switch Settings .............................................. 14
Button Operation...................................................15
Setting the Temperature........................................15
User Settings .......................................................16
Adjust Menu ......................................................... 17
Sequence of Operation for All tN2 Thermostats..19
tekmarNet®System Control ..................................19
Heating Operation.................................................19
Cooling Operation (530 Only) ...............................19
Fan Operation (530 Only) .....................................19
Schedules (Requires schedule device).................20
Optimum Start ......................................................20
Scenes..................................................................20
Cycles Per Hour / Synchronization .......................21
Indoor Temperature Feedback..............................21
Outdoor Temperature Display ...............................21
Warm Weather Shut Down....................................21
Freeze Protection..................................................21
Exercising..............................................................21
Flushing ................................................................21
Thermal Motor Zone Valves..................................22
Backlight ...............................................................22
Zone Test ..............................................................22
Max Heat...............................................................22
tekmarNet®Address..............................................22
Cool Group Master (530 Only)..............................23
Cool Group Member (527 and 528 Only)..............23
Troubleshooting Guide.................................................24
Testing the Wiring.......................................................... 25
Cleaning the Thermostat ............................................ 26
Warranty ............................................................................27

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The electrical drawing examples contained in this brochure show tN2 thermostats in common applications. Choose the
drawing that most accurately depicts the components in your system and use that drawing as a guide to aid in wiring your
system.
These are only concept drawings, not engineered drawings. They are not intended to describe a complete system nor
any particular system. It is up to the system designer to determine the necessary components for and configuration of
the particular system being designed including additional equipment isolation relays (for loads greater than the controls
specified output ratings) and any safety devices which in the judgement of the designer are appropriate in order to properly
size, configure and design that system and to ensure compliance with building and safety code requirements.
Electrical Drawings
An approved circuit breaker or power disconnect that de-energizes the high voltage wiring should be located near the Zone
Manager, and marked as the 115 V (ac) power disconnect for this device.
Powering the Zone Manager
Definitions
The following defined terms and symbols are used throughout this manual to bring attention to the presence of hazards of
various risk levels, or to important information concerning the life of the product.
– Caution: Refer to accompanying documents
– Caution: Refer to accompanying documents
INSTALLATION
CATEGORY II – Local level appliances
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 uses 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. Refer to qualified personnel for
servicing. Apart from any field replaceable fuse(s) there
are no user serviceable parts. Attempting to do so voids
warranty and could result in damage to the equipment
and possibly even personal injury or death.
Caution

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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 80% up to 88°F (31°C) decreasing
linearly to 50% RH at 104°F (40°C). Non-condensing
environment.
No exposure to extreme temperatures beyond 36-122°F
(2-50°C).
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Rough-In Wiring
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 ft. (1.5 m) off the finished floor.
The maximum length of wire is 1000 feet (300 m).
Strip wire to 3/8” (10mm) for all terminal connections.
Use standard 18 AWG wire for the tN2 connections.
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Mounting the Thermostat
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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Removing the Wiring Cover
To remove the wiring cover:
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 top
of the front cover so that it pivots around the bottom edge
of the thermostat’s base.
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OR
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
Switch
Box
Thermostat
Base
007 Adaptor
Plate
Thermostat 31/4”
(83 mm)
Stud
23/8”
(60 mm)
screwhole
23/8”
(60 mm)
screwhole
Thermostat
Thermostat
Base
Wall
Mounted on wallboardMounted on switch box
Push tab
1
Remove cover
2

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Thermostat Displays
Symbols Description
HEAT
Heat is turned on.
COOL
Cooling is turned on. (Only on 530.)
FAN
Fan is turned on. (Only on 530.)
SUN
Operating at the occupied (day)
temperature.
MOON
Operating at the unoccupied (night)
temperature.
CLOCK
Operating on a programmable
schedule.
AWAY
Operating at the Away scene
temperature.
WARM WEATHER SHUT DOWN
The heating system has been shut off
for the summer.
COOL GROUP MASTER
Thermostat operates the cooling for a
group of thermostats. (Only on 530.)
COOL GROUP
The cooling group is cooling. Heating
can only start once cooling is finished.
(Only on 527 and 528.)
tekmarNet®COMMUNICATION
Communication is present.
WARNING SYMBOL
Indicates an error is present. Refer to
Troubleshooting Guide at the back of
this manual.
SECONDARY
DISPLAY
MAIN
DISPLAY
This display shows all potential symbols that may show up on your thermostat. They will be referred to throughout this manual,
so it is a good idea to become familiar with those that are applicable to your thermostat model (527, 528 or 530).

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527 Thermostat
The Thermostat 527 operates a single hydronic heating system zone.
12 34
1234
tNt 527
527
One Stage Heat
Made in
Canada
Mmm YYYY Lot # 12345
Meets Class B: Canadian ICES FCC Part 15
1023-01
tN2
1tN2 2
Switch Settings:
For instructions see brochure
Use at least 65°C conductors
ON
Setback
Scene
None None
Thermal Motor
Cool Member 1
Off Off
527 tNt
tN2 Manager, Module
or Wiring Center
tN2 tN2
Test
Item
Menu
Heating System
Reset
Module
tN2
Zone
Manager
527
12 34
For instructions see brochure
Use at least 65°C conductors
12 34
Switch Position Action
1
ON
Setback
Thermostat will follow a schedule
device if one is present on the
system. (Schedule #1 only).
OFF OFF Thermostat does not follow a
schedule.
2
ON Scene The thermostat responds to Scene
changes (see “Scenes”, Page 20).
OFF OFF
Thermostat will not respond to
Scenes.
DIP Switch Settings
Thermostat 527 DIP Switches
These DIP switches are located on the inside of the thermostat cover. They are shipped “On” from the factory, and will not
have to be adjusted for most applications.
Wiring
Switch Position Action
3
ON None Thermostat is not part of a cooling
group.
OFF Cool Member 1 Thermostat joins as a member of
cooling group number 1.
4
ON None Thermostat operates a motorized
zone valve or zone pump.
OFF Thermal Motor
Thermostat operates a thermal motor
(wax actuator) zone valve.

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Button Operation
Button
The button raises the Set Room temperature.
and Buttons
Press the and buttons at the same time to view
additional settings.
Room Temperature
Press the or the button to select the desired
temperature for the current operating temperature.
The temperature range is from 40°F (4.5°C) to 85°F (29.5°C).
Use the or
button to adjust
temperature.
Setting the Temperature
527 Thermostat
Programmable Schedule
When operating on a programmable schedule, a
symbol is shown, as well as a or a . The or
indicates the current operating temperature.
If a symbol does not appear, there is no schedule
available. Schedules are provided by tekmarNet®Timers
or Thermostats that are connected to the Zone Manager,
Expansion Module or Wiring Center.
The Away temperature cannot be changed
Button
The button lowers the Set Room temperature.

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Display Description
STEP 1
Change the Non-current
Temperature
After pressing the and buttons simultaneously, the non-current
temperature setting will show on the display.
Press the or button to change the non-current temperature.
Current Temperature Non-current Temperature
The Away temperature is fixed at 62°F and is not adjustable.
Note: If switch setting 1 (setback) and switch setting 2 (scenes) are both
off, then the non-current temperature adjustment is not available.
STEP 2
°F or °C Press the or the button to change from °F to°C and vice versa.
STEP 3
Backlight
Off, 30 sec, On
Press the or the button to select the backlight to permanent Off,
30 second temporary on, or permanent On.
STEP 4
Auto cycle or
Synchronization
Press the or the button to select between Auto cycles or
Synchronization.
Available when:
• There is no tekmarNet®System Control on the system.
STEP 5
View Type and Software
Version
The large number shows the type number as 527.
The software version is shown in the upper right hand corner.
STEP 6
View tekmarNet®
Address
The thermostat’s tekmarNet®address is shown.
The address toggles between a number and “Au” when using automatic
addressing.
STEP 7
Manually Change
tekmarNet®Address
Press the or the button to manually select an address.
The address can be returned to automatic “Au” between addresses
24 and 1.
Ensure to document the address number when manually addressing
thermostats.
User Settings (1 of 1)
Press and hold down both the and buttons to change from one step to the next. While
holding both buttons down, a new setting will display every 5 seconds.
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 5 seconds to go to the next step, OR
After 10 seconds of no button activity, the display goes back to normal operation.
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Press
+
Together
To change settings other than the current temperature, use the following steps:
527 Thermostat

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528 Thermostat
12 34
1234
tNt 528
528
One Stage Heat
Made in
Canada
Mmm YYYY Lot # 12345
Meets Class B: Canadian ICES FCC Part 15
1023-02
tN2
1tN2 2
Switch Settings:
For instructions see brochure
Use at least 65°C conductors
ON
S1
3S1 4
Setback
Scene
None
Floor Sensor
Outdoor Sensor
Cool Member 1
Off
Off
12 34
1234
M YYY
Meets Class B:
Switch Settings:
ON
Setback
Scene
None
Floor Sensor
Outdoor Sensor
Cool Member 1
Off
Off
DIP Switch Settings
Thermostat 528 DIP Switches
These DIP switches are located on the inside of the thermostat cover. They are shipped “On” from the factory, and will not
have to be adjusted for most applications.
Test
Item
Menu
Heating System
Reset
Module
tN2
Zone
Manager
528
Floor or
Outdoor
Sensor
The thermostat 528 operates a single hydronic heating zone. It can be equipped with an optional outdoor sensor or floor
sensor using the sensor input.
12 34
1234
tNt 528
528
One Stage Heat
Made in
Canada
Mmm YYYY Lot # 12345
Meets Class B: Canadian ICES FCC Part 15
1023-02
tN2
1tN2 2
Switch Settings:
For instructions see brochure
Use at least 65°C conductors
ON
S1
3S1 4
Setback
Scene
None
Floor Sensor
Outdoor Sensor
Cool Member 1
Off
Off
tN2 Manager, Module
or Wiring Center
528 tNt
tN2 tN2 Slab Sensor 079
OR
Outdoor Sensor 070
Description
Switch Position Action
1
ON
Setback
Thermostat will follow a schedule
device if one is present on the system.
(Can follow Schedules 1 through 4.)
OFF OFF Thermostat does not follow a
schedule.
2
ON Scene The thermostat responds to Scene
changes (see “Scenes”, Page 20).
OFF OFF
Thermostat will not respond to
Scenes.
Switch Position Action
3
ON None Thermostat is not part of a cooling
group.
OFF Cool Member 1 Thermostat joins as a member of
cooling group number 1.
4
ON Floor Sensor Auxiliary sensor input configured for
floor sensing.
OFF Outdoor Sensor
Auxiliary sensor input configured for
outdoor air sensing.

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Room Temperature
Press the or the button to select the room temperature.
The display indicates whether the “HEAT” or the “COOL”
temperature is being changed.
If in Auto mode, press the Mode button to toggle between
Heat or Cool temperature adjustment.
Programmable Schedule
When operating on a programmable schedule, a symbol
is shown, as well as a or a . The or indicates the
current operating temperature.
Press the Local Override ( ) button to select the to
operate on a programmable schedule.
If a symbol does not appear, there is no schedule
available. Schedules are provided by tekmarNet®Timers
or Thermostats that are connected to the Zone Manager,
Expansion Module or Wiring Center.
FUse the or
button to adjust
temperature.
Setting the Temperature
Scenes (System Override)
When using scenes, there are three temperature settings:
, , Away. The scene takes precedence over any local
overrides or any programmable schedules.
While in the Away scene, the room temperature cannot be
changed using the or buttons. Change the scene
from Away to or to change the temperature.
While in the or Away scene and the button is
pressed, the or Away icon will flash. Scene 1 ( or
or ) must be activated before the thermostat responds
to the button.
Scene Display
1or or
2Away
3
528 Thermostat
Button Operation
Mode Button
The Mode button selects between Heat and Off.
When in Heat Mode the heating system operates to maintain
the Set Room or Floor temperature.
When in Off Mode the heating is shut off except for freeze
protection.
Button
The button raises the Set Room or Floor temperature.
Button
The button lowers the Set Room or Floor temperature.
Button - Local Override
The Local Override ( ) button changes between the
local override temperatures.
The option is Occupied ( ), Unoccupied ( ),
or follow the programmable schedule .