Product Usage - Secure SRT321 Manual

Product Usage

Thermostats using TPI (Time Proportional Integral) control algorithms will reduce the
temperature swing that normally occurs when using traditional bellows or thermally operated
thermostats. As a consequence, a TPI regulating thermostat will maintain the comfort level far
more efficiently than any traditional thermostat.
When used with a condensing boiler, the TPI thermostat will help to save energy as the
control algorithm allows the boiler to operate in condensing mode more consistently
compared to older types of thermostat.
DIL switch numbers 7 and 8 should be set as diagram opposite.

For Gas boilers set the TPI setting to 6 cycles per hour. (Default setting)

For Oil boilers set the TPI setting to 3 cycles per hour.

For Electric heating set the TPI setting to 12 cycles per hour.

The DIL switch 1 has to be set to position "ON" for configuration mode. To go bacj to
normal mode switch the DIL switch 1 to the "OFF" position.
Turn the rotating dial on the front within configuration mode and select the desired function
by pushing the dial once:
I Include Node onto network

E Exclude Node from network

N Transmit Node Information Frame (NIF)

L Learn Mode - use this command for Include or Exclude with another controller

(does not support control group replication) Inclusion and reception of a primary role
(Controller Shift)
Li Receive Period Enabled (Listening). This function will keep the unit awake for

60sec, no Pass or Fail response will be provided
P Protocol Reset - Press twice to activate Will restore all parameters back to factory

default settings
A Associate Control Unit

D Disassociate Control Unit
