24
OPERATING CHARACTERISTICS
A
I
The set temperature refers to the set return water temperature or
inlet temperature;
In the event of a temporary power failure, when power returns, the
mode set previously will be retained in the memory.
If there is a possibility that the outside temperature may drop
below zero,there is the risk of freezing.
The water circuit MUST BE EMPTIED AND SHUT OFF
POWER (when draining after heat pump operation take care
as the water may be hot) or antifreeze must be added in the
proportion recommended by the manufacturer.
{|}
℃
（
default
：
12
℃）
If the set temperature is between 10~13
℃
, the compressor start and
shut down according to the difference between the inlet temperature
If the set temperature is between 14~20
℃，
the compressor start and
shut down according to the difference between the inlet temperature
{}
℃
（
default
：
40
℃）
If the set temperature is between 35~44
℃，
the compressor start and
shut down according to the difference between the inlet temperature
If the set temperature is between 45~50
℃，
the compressor start and
shut down according to the difference between the inlet temperature
!"""#$
In order to prevent the compressor frequent start and stop, the
compressor must ensure that each start since the last stop since the
minimum time of 300 seconds.
%#&'"'
The electronic board includes two pumps control output. The pump 1
running 3 seconds, the pump 2 starts running. The pump 1 starts
$$
the compressor starts up and stops 120 seconds after the assembly
shuts down.
After the first 120 seconds of pump1 operation when the water flow
meets the operating requirements, the water flow alarm functions are
activated (differential pressure switch or flow switch). If the differential
pressure switch (or flow switch) detects a continuous closure for 15
seconds, the unit can run normally, otherwise, it will shut down and
+
In the unit operation process, if the continuous 10 seconds to detect
the differential pressure switch (or flow switch) is opened, the unit will
+
*+"#
For correct operation of the unit with different ambient
temperatures, the microprocessor controls the fan speed based
on the ambient temperature and the condensing or evaporation
temperature as well as compressor frequency, thus enabling heat
exchange to be increased and/or decreased, maintaining the
condensing or evaporation temperature practically constant.
5+"7
To prevent the water freezing and damaging the plate heat
exchanger, the microprocessor will perform antifreeze protection
program if the heat exchanger temperature or the water
temperature below a certain temperature.
temperature or the outlet temperature sensor is less than 3
℃
, the
compressor will shut down and the controller display Pb code, the
water pump will continue to run until the heat exchanger
$<
℃
and the
unit will resume normal operation.
$$
℃
, the
controller display Pb code, the water pump will continue to run until
the heat exchanger temperature or the inlet temperature sensor is
above 15
℃
. If the heat exchanger temperature or the inlet
temperature sensor continues to fall below 5
℃
, the unit will be
forced heating operation, the compressor and the water pump will
be running until the heat exchanger temperature or the inlet
temperature sensor is above 15
℃
.
$
℃
and the heat
exchanger temperature or the inlet temperature sensor is less
than 2
℃
, the electric exchanger temperature heating will turn on
until the heat exchanger temperature or the inlet temperature
sensor is above 7
℃.
If the unit is likely to operate below 0
℃
, it is advisable to add
antifreeze to the water system to prevent the unit from freezing the
system in the event of a power cut off or failure.
8+;
When the fin heat exchanger temperature over than 62°C, system
will shut down, but not returns to normal operation until the
temperature decreased less than 52°C.
<#"
If the compressor discharge temperature is more than 115
℃，
the
compressor will be stop running until the temperature is lower than
℃
. The compressor starts with a 5 minute delay protection.
Tin-Ts
Tin-Ts
Tin-Ts
Tin-Ts
2
-1
on
off
2
-2
on
off
2
-2
on
off
0
-4
on
off
