ESI ESRTERFW User Instructions - Page 5

Browse online or download pdf User Instructions for Thermostat ESI ESRTERFW. ESI ESRTERFW 8 pages. Wireless digital room thermostat
Also for ESI ESRTERFW: Installation Instructions Manual (16 pages)

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certain size to have more than 1 heating zone).

Room thermostats need a free flow of air to sense the

temperature, so they must not be covered by curtains or

blocked by furniture. Nearby electric fires, televisions, wall

or table lamps may prevent the thermostat from working

properly. Also keep out of direct sunlight.

A Wireless Room Thermostat operates using radio signals

between the unwired battery operated thermostat and

a wired receiver. Put simply the time and sensor part

are separated from the hard wired part. Wireless Room

Thermostats are ideal for use in situations where it is not

possible to hardwire the programmable thermostat back to

the boiler. E.g. retrofit where walls are already decorated or

not suitable for chasing cable through.

N.B. This thermostat has the option of standard setting or TPI.

Thermostat Display

This product has a built in auto-rechargeable battery to power

the display when the system is between heating cycles. To

conserve power this will run for eight hours and if the heating

intervals are more than eight hours apart, the display will

"go to sleep" – although the thermostat is still active. When

mains power is restored, the battery auto-recharges. This is a

design feature to ensure the delayed start thermostat clears

its memory at the end of every heating cycle.

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 compensator as it

ensures that the boiler 'ON' time is reduced to a minimum

and matches the boiler heat output with the heat loss. This