Inst253 Astral Heat Pumps V07.13
12
sensor is under “setting temperature
－
Auto mode temperature difference”, and it stops heating when
the temperature is over “setting temperature”.(Attention:when set F17<F12, F17=F12 admited)
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Compressor delay time
The compressor delay time is set by F21, for example, 3 minutes. The controller contains
a“compressor halt calculagraph”, and it begins to time when compressor stops, the program first check
the calculagraph before booting the compressor next time, the program will immediately boot the
compressor if the calculagraph reach 3 minutes ,if the calculagraph doesn’t reach 3 minutes ,it will boot
again when the calculagraph reaches 3 minutes. Thus you can ensure that the boot alternation is over 3
minutes after halt, so it can prevent to breaking the compressor as a result of frequent boot. In addition,
the controller doesn’t boot the compressor within 3 minutes after turning on the power supply, thus the
compressor can also be protected in the state of power cut and then power on.
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Auto defrosting principle
The controller will supervise the temperature of outdoor machine when heating normally, and
decide whether need to defrost according to the time of the outdoor machine in the continuous low
temperature state. In other words, the defrosting calculagraph begins to time when the outdoor machine
temperature is lower than “defrost start temperature”, and turns on the defrosting when the value of time
reaches “defrost start time”. The calculagraph will be cleared if the outdoor machine temperature is
higher than “defrost start temperature” when timing, and it begins to time again when the outdoor
machine temperature is lower than “defrost start temperature” next time. In other words, the value of
defrosting calculagraph shows the continuous low temperature time of the outdoor machine.
The controller can check the defrosting effect with the temperature of outdoor machine, if the
temperature of outdoor machine goes up to the “defrost end temperature”, the controller will turn off the
function of defrosting. If the defrosting time is above “max defrost time”, the controller will turn off
defrosting forcibly.
The process above can only run in heating state, in other words, the controller will not turn on
defrosting in non-heating state.
Air defrost mode:when start defrost,the compressor stop running ,the fan continue running;when
stop defrost the compressor and fan continue running;
4 way valve defrost mode: when start defrost,the compressor and fan continue running,the four-
way valve energized;when stop defrosting the compressor and fan continue running, the four-way valve
powered off.
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Water pump control
The controller can choose whether to use water pump or not (F40),0 means no water pump function,
1 means use water pump. When water pump runs, the compressor start up ahead of the time of F41,
delaying turn off the compressor of the time of F42.When external alarm and probation time over
alarm,cut off water pump output immediately.The compressor won’t start up until the water pump
achieve the working time of F41.
When the machine unit stop running,the water pump follow the below request: F43stop, F44 run,and
circle.
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External alarm
The controller can connect 3 switching values as external alarm source (Pin 4, 5), (Pin 13, 14), (Pin
14, 15), Only when the compressor is running ,and the external alarm occurs, the controller stops,
displays the alarm code “A11”, “A12” “A15”. External alarm signal: always closed, unlocked.
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Running in different period of time
The controller contains real time clock, and can time accurately. In “Econ Mode”, the controller will
ensure that whether need to heat according to water temperature, otherwise the current time is in or not in
the setting period of time, if it is not in the setting period of time, then the controller will not heat whether
the water temperature is high or low.
The controller can be set 3 heat periods of time at most, if you don’t need some periods of time, you
can set the starting time and ending time which you don’t need as “OFF”.
In addition, if the ending time is earlier than starting time, the controller considers this ending time is
next day. For example, the period of time is “22:00”to“03:30”, the controller considers it as 22:00 at
night to 03:30 next day.
Summary of Contents for BPM400A
Page 2: ...Inst253 Astral Heat Pumps V07 13 2 ...
Page 22: ...Inst253 Astral Heat Pumps V07 13 22 WIRING DIAGRAMS BPM400 BPM600 ...
Page 23: ...Inst253 Astral Heat Pumps V07 13 23 WIRING DIAGRAMS BPM700 BPM800 ...
Page 24: ...Inst253 Astral Heat Pumps V07 13 24 WIRING DIAGRAMS BPT900 ...
