Control
28
Before the Degree Minute reach - 60 (adjustable) ,the compressor is off, but when the Degree
Minute reach - 60 (adjustable) ,the compressor automatic start,and the flow teperature will
begin increase.
(
Higher
than desired temperature) when the actual water supply temperature reach / higher than
the desired temperature, the DM will be changed.
For example : the DM was cumulated to -160 in this time.
1 minutes later when the actual water supply temperature higher than desired temperature for 1
℃
.
10X1=10 ,Degree Minute= -150;
Another 1 minutes later when the actual water supply temperature higher than desired temperature for
2
℃
. 10X1=10,Degree Minute=-140;
Another 1 minutes later when the actual water supply temperature higher than desired temperature for
3
℃
. 10X1=10,Degree Minute=-130;
Another 1 minutes later when the actual water supply temperature higher than desired temperature for
4
℃
. 10X1=10,Degree Minute=-120;
……………………
Compressor off when Degree Minute reach 0
(adjustable)
.
Degree Minute s(DM) instruction
The relationship between compressor (on and off) and DM,the relationship
between heater(on and off) and DM.
The above diagram describe the relationship between compressor (on and off) and Degree Minute,
the relationship between heater(on and off) and Degree Minute.
Compressor ‘s Degree Minute are :-60 (on) and 0(off),A0=-60 (on)
Heater 1’s Degree Minute are : ‘-500’(on) and ‘-60’(off), A0+A2=-60-440=-500 (on)
Heater 2’s Degree Minute are : ‘-500’(on) and ‘-500’(off)
Heater 3’s Degree Minute are : ‘-600’(on) and ‘-550’(off)
When ambient temperature more than 6
℃
,heater can not automatic start
When flow temperature less than 15
℃
, heater can start at once,and the sequence of three heaters’
start will extremely follow own Degree Minute.
The relationship between compressor and DM
