Samsung RC090-120-140 Installation And Maintenance Manual page 15

Test 1 To Avoid further problems we recommend you set
the units up in test mode before starting the heat pump.
Firstly in test mode run the pump, press blue set button and test button together for 6
seconds. The controller will display TEST. Immediately press the top left button to turn the
pump on and leave it running while in test mode. When the pump is running a little house with
a circle around it in the status window of the controller.
The unit wants to see at least 17 l / min flow to activate
the flow switch, if there is not enough flow the unit will
never operate. You should have a flow meter installed,
if you haven't now is the time to buy one.
If you look into the flow meter you can see the flow in
litres per minute. In this picture you can see a flow rate
indicated, this shows 25l/min NOT 35l/min
If the flow rate is too low you need to fix this before moving on. See problems page 17
Once the flow rate is high enough move onto test 2 below (while still in test mode)
Test 2 if you don't have a header, heat exchanger or
buffer
Set up the bypass valve with radiators
In heating mode check the unit is pushing water into the radiators only. Open the bypass
valve fully, if you are not sure set it to its lowest setting. Now close every radiator on the
system except one. Using the flow meter check the flow rate is above 16/l to avoid faults.
Adjust the bypass valve to achieve this. The bypass is set now open the rads again.
To exit service mode press and hold cancel delete for 6 seconds
Set up the bypass valve with U floor heating
In heating mode check the unit is pushing water into the under floor heating circuit only
Open the bypass valve fully, if you are not sure set it to its lowest setting. Using the flow
meter check the flow rate is above 16/l to avoid faults. Adjust the bypass valve to achieve this.
The bypass is set now turn up the wall stats again.
To exit service mode press and hold cancel delete for 6 seconds
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