About SPECIAL FUNCTION
SPECIAL FUNCTION
The SPECIAL FUNCTION contains AIR PURGE, PREHEATING
FOR FLOOR, and FLOOR DRYING UP. It’s used in special situations.
For example: the initial start of the unit, initial running of floor heating.
NOTE: the special functions can be used by service man only, during
special function operating other functions(SCHDULE,HOLIDAY AWAY,
HOLIDAY HOME) can’t be used.
How to enter SPECIAL FUNCTION
Go to MENU> FOR SERVICEMAN> SPECIAL FUNCTION.
Use ▼ ▲ to scroll and use OK to enter.
During first operation of the unit, air may remain in the system which
can case malfunctions during operation. It is necessary to run the air
purge function to release the air (make sure the air purge valve is open).
：
During air purge, the 3-way valve will open, and the 2-way valve will
close. 60 seconds later the pump in the unit (PUMPI) will operate for
10 min, during which the flow switch will not work. After the pump
stops, the 3-way valve will close and the 2-way valve will open. 60s
later the both the PUMPI and PUMPO will operate until the stop
command is received.
The number displayed on the page is the time that the air purge has
run. During air purge, all the buttons except OK are invalid. If you want
to turn off the air purge, please press OK, then the following page
is displayed:
During test run, all buttons except OK are invalid. If you want to turn
off the test run, please press OK. For example ,when the unit is in air
purge mode, after you press OK, the page will displayed as follows:
Use ◄ ► to scroll the cursor to YES and press OK. The test run will
turn off.
Use◄ ► to scroll and use OK to confirm.
If PREHEATING FOR FLOOR is selected, after press OK ,the page
will displayed as follows:
When the cursor is on T1S, dT1SH or t_fristFH, Use ◄ ► and ▼ ▲
to scroll and adjust the parameter.
T1S is the target outlet water temperature in preheating for floor mode.
The T1S set here should be equal to the target outlet water temperature
set in the main page.
dT1SH is the temperature difference for stopping the unit. (When
T1≥T1S+dT1S occurs the heat pump will turn off)
t_fristFH is the time last for preheating floor.
The operation of the unit during preheating for floor described in the
picture below:
When the cursor is on OPERATE PREHEATING FOR FLOOR,
Use ◄ ► to scroll to YES and press OK. The page will be
displayed as follows:
12.1 AIR PURGE
Do you want to turn off the
air purge function?
NO YES
11 TEST RUN
Do you want to turn off the
test run(air purge) function?
NO YES
12.1 AIR PURGE
Air purge is running for 25
minutes.
12.2 PREHEATING FOR FLOOR
Preheat for floor is
running for 25 minutes.
Water flow temperature is 20
NO YES
T1s+dT1s
T1s
Compressor
Pump
30min
t_interval_H
OFF
ON
OFF
ON
OFF
T1
OFF OFF OFF OFF OFF OFF
ON ON ON ON ON
t_firstFH
t
47
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