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EPH Controls Ltd.
TPI (Time Proportional & Integral Mode)
When the thermostat is in TPI mode and the temperature is rising in the
zone and falls into the Proportional Bandwidth section, TPI will start to
aect the thermostats operation. The thermostat will turn on and o as
it gains heat so that it doesn’t overshoot the setpoint by too much. It
will also turn on if the temperature is falling so it doesn’t undershoot the
setpoint which will leave the user with a more comfortable level of heat.
There are 2 settings that will aect the thermostats operation:
1. CYC - No. of Heating Cycles per
Hour:
6 Cycles
This value will decide how often
the thermostat will cycle the
heating on and o when trying to
achieve the setpoint temperature.
You can select 2/3/6 or 12.
2. Pb - Proportional Bandwidth:
2˚C
This value refers to the
temperature below the setpoint
at which the thermostat will start
to operate in TPI Control. You can
set this temperature from 1.5˚C to
3.0˚C in 0.1˚C increments.
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