Daikin EWAA016DAV3P - Checklist During Commissioning; Minimum Flow Rate

12 | Commissioning
Installer reference guide
187
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
The correct pipe size is installed and the pipes are properly insulated.
There are no water leaks inside the outdoor unit.
The shut-off valves are properly installed and fully open.
The manual air purge valve is closed.
The pressure relief valve purges water when opened. Clean water must come out.
The minimum water volume is guaranteed in all conditions. See "To check the water
volume and flow rate" in "8.1Preparing water piping"[462].
12.4 Checklist during commissioning
The minimum flow rate is guaranteed in all conditions. See "To check the water volume
and flow rate" in "8.1Preparing water piping"[462].
To perform an air purge.
To perform a test run.
To perform an actuator test run.
Underfloor screed dryout function
The underfloor screed dryout function is started (if necessary).
12.4.1 Minimum flow rate
Purpose
For a correct operating unit, it is important to check if the minimum flow rate is
reached. If needed, modify the bypass valve setting.
If operation is… Then the minimum required flow rate
is…
Cooling 20l/min
Heating/defrost when outdoor
temperature is above –5°C
Heating/defrost when outdoor
temperature is below –5°C
22l/min
To check the minimum flow rate
1 Check the hydraulic configuration to find out which space
heating loops can be closed by mechanical, electronic, or other
valves.
—
2 Close all space heating loops that can be closed. —
3 Start the pump test run (see "Actuator test run"[4190]). —
4 Read out the flow rate
(a)
and modify the bypass valve setting to
reach the minimum required flow rate + 2l/min.
—
(a)
During pump test run, the unit can operate below the minimum required flow rate.