32
33
Before power up
On the indoor circuit board set the following switches
DSW 4, Pin 5 needs to set pushed up
DSW 4 Pin 3 push to up to enable immersion heater
Note before the unit will run the expansion valve dip switch needs
to be set by the fridge engineer.
If the pipe length is under 5m set DSW2 pin 1 up to on. If the pipe
length is over 30M set DSW2 pin 2 to up on
First make sure the dip switches are set, see the settings for your
unit.
Before filling the unit with water remove cap from auto vent in
unit, on the combi its top left inside the indoor unit.
Please make sure all fittings are tight before filling the unit with
water
Filling and flushing
, when installing any Heat pump,
we insist on
a
thorough system flush prior to connection in line with the Building
Regulations for England and Wales, Part L, 2006. Using the power
flusher fill the system with water, there is a pressure sensor in the
unit so we can operate from 1.5 -3 bar maximum.
In Monobloc units only Using the power fill the system with water
and 25% Propylene Glycol
Setting up the cylinder immersion heater
To avoid the immersion heater cutting out before the legionella
function is complete you have to set the stat in the immersion
heater to 65°C minimum, on a Telford cylinder set it to 5.
Powering Up
Makes sure all your room thermostats are off and all underfloor
run signals are off.
Apply power to outdoor unit first. Now power the indoor unit, you
should see a display on the indoor and outdoor pcb.
Vaccing and Charging
All split units are delivered with a refrigerant charge in the outdoor
unit and all expansion valves in the indoor unit in the fully open
position.
If you power the unit up the expansion valves DO NOT close.
You can vac the system powered or unpowered.
Once you have released the refrigerant into the system and added
any additional charge you need to be set the unit back to normal
operation.
Power off the units (indoor and outdoor for 5 mins.
Flick DSW4 pin 2 to down (Off).
If you don’t do this the unit will never run.
Now turn to page 33.
Split Installation
Start-up procedure
