www.samsungehs.co.uk
©G Hendra April 2015
22
Explaining the Operation of the System to the end user
You have now set the unit up to run from an external signal Using a field supplied room
thermostat or signal from an under floor heating system through B20-B22 and/or B20-B24;
the controller no longer drives the unit.
When the contact is made the unit will start and the water temperature will be controlled by
the heat pump, you will not have any control over it. The water temperature is determined by
the outdoor temperature; the colder it is outside the warmer the water. The unit is running in
weather comp mode,
You will see 0.0C on the
screen
; the unit is using
weather compensation
function to work out the water
temperature. If you need to
boost the heating water temp
this can be done by pressing
the silver up and down
buttons. This boosts the
radiators by up to +5 C but
warning this will cost more
money to run.
When an external stat or run
signal is used most of the
functions of the Samsung remote are disabled. A waging finger shows at the bottom to show
this.
All these buttons are disabled and the functions they control are also disabled
Note:
when the heating command is
sent to the unit it will not start for 3
minutes. And when the thermostat or
signal is removed the pump will run on for
up to 6 minutes.
On latest software the end user can
override the stat switching the unit off with
the top left button. Avoid this as the unit
will no longer run. If the sun signal is not
on the display the heating is not going to
operate.
How hot water works
The hot water cylinder has priority over the heating, if the cylinder temperature falls 5 degrees
below its set point the unit will automatically switch to heating the cylinder. Once set
temperature is achieved the unit will go back to heating the house.
The hot water cylinder loses almost no heat (1/3 a degree an hour) if no hot water is used.
The hot water cylinder takes less than an hour to heat up from cold. If you need hot water
very fast the DHW button forces the unit to heat the water flat out, the unit will stay in this
mode until you press the DHW button again
To protect from legionella the cylinder is heated to 60 degrees C once a week automatically.
