Introduction To The Esrtp4Rf; What Is Chronoproportional Controls (Tpi) - ESI ESRTP4RF User And Installation Instructions Manual

thermostat and a wired receiver. Put simply the time and
sensor part are separated from the hard wired part.

Introduction to the ESRTP4RF

The ESRTP4RF is an easy to install and use Wireless 7 Day,
5/2 Day or 24 Hr Programmable Room Thermostat which
offers four to six time and temperature changes each day,
with different programmes available for weekdays and for
weekends. It is designed to provide automatic time and
temperature control of heating systems in domestic or
light commercial premises. A large backlit LCD screen and
easy-to-use function buttons ensures simplified program-
ming and operation for all users.
Your ESi Controls Programmable Room Thermostat
includes special features designed to save you energy.
These features are factory set to be OFF to enable the
homeowner to choose whichever features are preferred.
Also, please note these features only apply to your home
heating and not the hot water system.
What is Chronoproportional Control (TPI)?
A chronoproportional (or TPI) room thermostat makes
boilers operate more efficiently and provide close accurate
control. Chronoproportional control is a load compensa-
tor as it ensures that the boiler 'ON' time is reduced to a
minimum and matches the boiler heat output with the
heat loss. This reduces the net temperature of the return
water to the boiler. This is due to the TPI (Time Proportion-
al and Integral) advanced energy saving feature.
Rather than just a simple ON/OFF control, like other
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