Secure SRT322 User And Installation Instructions Manual page 9

DIL switch settings – TPI temperature control software
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
Ÿ
opposite.
For Gas boilers set the TPI setting to 6 cycles per hour.
Ÿ
(Default setting)
For Oil boilers set the TPI setting to 3 cycles per hour.
Ÿ
For Electric heating set the TPI setting to 12 cycles per
Ÿ
hour.
SWITCH CONFIGURATION SRT322
Switch positions for
different TPI settings.
ON
OFF
TPI
3
TPI
6
TPI
12
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