Installation and Operation Manual

© 2012 557_D - 11/12
4 of 48
A Watts Water Technologies Company
Thermostat Wiring
The thermostat operates a single heating system zone and can be wired in three
different ways.
Stand Alone - Similar to tekmarNet
®
4 wiring with tN4 wiring terminal not used. First
stage heating relay (Rh1 - W1) can be wired directly to switching relays.
tekmarNet
®
4 - Allows the thermostat to be wired using 4 wires to a tN4 Wiring Center
or Zone Manager. The tN4 communication bus can also be daisy-chained to allow
multiple thermostats to be connected together without home running wires back to the
mechanical room.
tekmarNet
®
2 - Allows the thermostat to be wired point-to-point using 2 wires to a tN2
Wiring Center, House Control, or Zone Manager. This allows easy wiring for retrofit
applications.
Application specific wiring diagrams are provided in the 557_A brochure.
If a gang box is not used:
Feed the wiring through the large
holes in 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.
Terminate wiring to the wiring strip.
Re-install the wiring cover.
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•
•
•
Mounting The Thermostat
If a single gang box is used:
Feed the wiring through the large
holes of the thermostat.
Fasten the base of the thermostat to
the gang box using two screws.
Terminate wiring to the wiring strip.
Re-install the wiring cover.
•
•
•
•
Stud
Wall
Thermostat
Wiring Cover
Stud
Thermostat
Wiring
Cover
3
1
/
4
”
(83 mm)
Switch Box