Heat Pump Configuration - Hitachi YUTAKI RWM-2R1E Installation & Operation Manual

YUTAKI CASCADE CONTROLLER ATW-YCC-03

11.13.3.8 Heat Pump configuration

Water pump configuration:
Configure the water pump of the heat
pump.
See detailed information in the next page.
Minimum OFF time:
In order to reduce a possible compressor
damage, demand OFF cycles can
be reduced by determining the time
that must pass before accepting new
Demand ON.
Seizure protection:
The pump seizure protection function
prevents sticking of components due to
long periods of inactivity, by running the
components during a short period every
week. Mixing valves and pumps are fully
opened and then fully closed (time depends
on Mixing valve Run Time Factor).
301 PMML0575 rev.2 - 03/2022
Outdoor average temperature:
OTC average is used to neutralise the effect of
occasional temperature variations.
The average value of outdoor temperature
sampled over a selected period (between 1 and
24 hours) is used for the calculation of weather-
dependent set point temperature.
Minimum ON time:
In order to reduce a possible compressor
damage, demand ON cycles can be reduced
by determining the time that must pass before
accepting new Demand OFF.