Tekmar tN4 538, tekmarNet 4 538 Wiring Brochure
- Wiring Brochure
tekmarNet®4 Thermostat 538
W 538
12/08
1
Information
Brochure
Choose controls
to match
application
2
Application
Brochure
Design your
mechanical
applications
3
Brochure
Rough-in
instructions
Layout
wiring
4
Wiring
Brochure
Wiring and
installation of
specific control
5
Data
Brochure
Control settings
and sequence of
operation
6
Job
Record
Record settings &
wiring details for
future reference
Overview
The following brochure describes how to wire the tekmarNet®4 (tN4) thermostat 538. The 538 has an output for one stage
of heat, and an auxiliary sensor input for an optional floor or outdoor sensor.
Auxiliary Sensor Input
Table of Contents:
Definitions ....................................................................... 2
Rough-In Wiring .............................................................2
Remove the Wiring Cover ..............................................3
Mounting the Thermostat ...............................................3
Wiring Symbols ...............................................................3
12 34
tN4
Network
24 V (ac)
Power
Heating
DIP
Switch
Settings
Electrical Drawings ......................................................3-5
Wiring the Thermostat .................................................... 6
Troubleshooting the Wiring ............................................. 7
Testing the Wiring ....................................................... 7, 8
Technical Data ................................................................ 8
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Defi nitions
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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.
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
uses as a primary limit control. Other controls that are
Rough-In Wiring
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 92% to 104°F (40°C), and 50%
above 104°F (40°C). Non-condensing environment.
No exposure to extreme temperatures beyond 36-122°F
(2-50°C).
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. 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.
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.
Use standard 18 AWG wire for the thermostat power, stages,
tN4 and sensor connections.
Refer to the diagram below to determine the number of
conductors to run from each piece of equipment to the
thermostat location.
2 Cond. / 18 AWG
4 Cond. / 18 AWG
© 2008 W 538 - 12/08 2 of 8
Sensor 1
1st Stage Heat
24 V (ac) Power
tN4 Network
Note: When multiple wires
run to the same equipment
location, wiring conductors
can share one wire jacket.
Zone Manager
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Remove the Wiring Cover
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2
3
/8”
(60 mm)
screwhole
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 against the plastic tab, pull the top of the
front cover so that it pivots around the bottom edge of
the thermostat’s base.
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.
Stud
Switch
Box
1
/4”
Thermostat
Thermostat
Base
007 Adaptor
Plate
3
(83 mm)
1
2
Remove cover
Push tab
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.
Stud
Thermostat
Base
OR
Thermostat
3
2
/8”
(60 mm)
screwhole
Wall
Mounted on wallboardMounted on switch box
Wiring Symbols
Dry contact switch. Operates a device.
Powered switch. 24 V (ac), switched
output to valve, pump relay etc.
Do not apply power to these terminals.
Serious control damage will result.
tekmarNet®4
Electrical Drawings
The electrical drawing examples on the following pages show
the 538 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
3 of 8 © 2008 W 538 - 12/08
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.
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