tekmar 552 Thermostat Installation - Manual (Page 6)

© 2014 552_D - 09/14
6 of 44 A Watts Water Technologies Company
Thermostat Wiring
The thermostat operates a single heating system zone and can be wired in four
different ways.
tekmarNet ® 2 - Allows the thermostat to be wired point-to-point using 2 wires to a
tekmarNet ® 2 Wiring Center, House Control, or Zone Manager. This allows easy
wiring for retrofit applications.
tekmarNet ® 4 - Allows the thermostat to be wired using 4 wires to a tekmarNet Wiring
Center or Zone Manager point-to-point. Alternatively, the thermostat can operate
heating equipment locally and the tN4 communication bus can be daisy-chained
from one thermostat to another.
Stand Alone - Simple 3 wire connection to a 24 V (ac) transformer and zone valve.
Stand Alone - Simple 3 wire connection to a switching relay or zone valve control.
Wiring - tekmarNet ® 2 ------------------------------------------------- -------------------------------------------------
Wiring - tekmarNet ® 4 ------------------------------------------------- -------------------------------------------------
tN2 tN2
C
tN2
tN4
tN2
R
Rh W1
No Power
S1 S2 Com
tN2 Wiring Center
tN2 House Control
tN2 Zone Manager
Optional Sensor 1
Optional Sensor 2
C
tN2
tN4
tN2
R
Rh W1
No Power
S1 S2 Com
tN4 C W R
Optional Sensor 1
Optional Sensor 2
Install field jumper
wire R to Rh
tN4 Wiring Center
tN4 Zone Manager