18
3.1.5
Valve Set-up
•
Switch the unit to the highest operating position.
•
Close external windows and doors.
•
With the system operating in high mode, proceed to open the extract valves to their maximum.
•
Measure the total air volume at the extract valves.
•
Regulate the extract valves to the required flow per room.
•
Switch the unit to low speed to confirm desired extract rate is achieved.
It should normally not be necessary to adjust the extract valves further.
•
Repeat tests for supply air valves.
3.1.6
Once the unit is commissioned check that the system is operating correctly by turning the hardwired switch to
the differing settings, i.e. the GS2 switch or GRC1 controller will activate the unit between low and high speed
settings.
•
Performance levels can be verified at both extract and supply air valves using an appropriate
method such as a rotating vane anemometer and air cone kit.
•
Record airflow rates for room extract and supply air valves for low and high speeds within the
separate User/Homeowner guide that should be incorporated into the Home Information Pack for the
homeowner to keep.
•
Refer to performance graphs for Vireo HR155WM / HR155CM / HR185WM airflow characteristics
(See Section 3.1.7 and 3.1.8)
.
Note: All settings are stored within the Vireo unit’s memory and should NOT be lost in the event of
a power failure. When power is restored, the unit should revert to normal running with all settings
unchanged. Likewise, reminder indicators are NOT reset.
3.1.7
Performance Graph
- Airflow Characteristics for Vireo HR155WM / HR155CM
3.1.8
Performance Graph
- Airflow Characteristics for Vireo HR185WM
