Checklist During Commissioning; Minimum Flow Rate - Daikin EWYA004D2V3P Installer's Reference Manual

12.4 Checklist during commissioning

12.4.1 Minimum flow rate

EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
Only for models with integrated backup heater (F1B: field supply), or if the external backup
heater kit (F1B: factory-mounted in the backup heater kit) is installed:
Backup heater circuit breaker F1B is turned ON.
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 automatic air purge valve is open.
The pressure relief valve (space heating circuit) 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
The minimum flow rate is guaranteed in all conditions. See "To check the water volume
and flow rate" in "8.1 Preparing water
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).
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...
Cooling
Heating
BUH operation
Heating defrost
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
4 Read out the flow rate
reach the minimum required flow rate + 2 l/min.
(a)
During pump test run, the unit can operate below the minimum required flow rate.
"8.1 Preparing water piping" [
4
piping" [ 59].
Then the minimum required flow rate
"12.4.4 Actuator test
(a)
and modify the bypass valve setting to
12 Commissioning
|
4
59].
is...
10 l/min
6 l/min
12 l/min
12 l/min
4
run" [ 190]).
Installer reference guide
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