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CP4B Room Thermostat
PO 1 Operating Mode
(Normal / Optimum Start / TPI)
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
affect the thermostats operation. The thermostat will turn on and off 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 affect 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 off 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.