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5. Test run
5-1. Instructions for debris removal operation
5. Test run
In this operation, debris that is generated during installation is removed from the water circuit.
Perform this operation after water and refrigerant piping work, air tightness test, evacuation, and refrigerant
charging have been completed and electrical work is done.
5-1-1.Preparation for debris removal operation
1.Open the air vent valves on the HBC controller and indoor units.
Refer the Installation Manual for the location of air vent valves.
(If there are air vent valves on the field-installed pipes, open the valves as well.)
HBC controller
2.Set DIP SW 5-1 (valve opening when stopped), DIP SW 5-2 (nullification of drain over-flow error for 9 hours) from off to on.
3.Supply water from the suction pipe on the HBC controller.
4.Check that water comes from each air vent valve, and perform the debris removal operation.
5-1-2.Debris removal operation
1.If there are a large amount of debris in the water in the field-installed pipes, set DIPSW4-1 from OFF to ON.
(Refer to the flowchart for debris removal operation for details.)
Perform the debris removal operation. (Each air vent valve should stay open.)
2.When 30 minutes have passed after the operation startup, water pump will stop, and the LED display on the
HBC controller changes from "Air0" to "Air1", then from "Air1" to "Air2".
3.Stop the water supply, and check that no water comes from the air vent valves.
4.Set DIP SW 4-6 to ON and 4-7 to OFF. Turn the power to the HBC off. Remove, clean and then refit the water supply
strainer and the strainer nearest the water supply in the HBC.
5.After the power to the HBC controller is turned on and the system starts up, set DIPSW4-6 and DIPSW4-7 to ON.
Turn off the power to the HBC controller again, and clean the other strainer furthest from the water supply.
(After the cleaning, set DIPSW4-6 and DIPSW4-7 to OFF.)
6.Make sure the strainers are re-installed.
Flowchart for debris removal operation (DIPSW4-1 is ON.)
Intermittent operation of water pump (20 min)
Step 1
Operation of all indoor units (20 min)
Step 2
( 1 ) Each step can be skipped by setting DIPSW4-2 from OFF to ON.
( 2 ) The operation can be forced to stop by setting DIPSW4-4 from OFF to ON.
( 3 ) If insufficient air vent is detected at each step, go back to step 1.
<General cautions>
( 1 ) To avoid malfunction, do not connect or disconnect the power connector of the water pump being powered on.
( 2 ) Check for water leaks from the field-installed pipe joint during operation.
( 3 ) Do not pull the clip on the connection of the water pipe with pliers so that undue force is applied.
( 4 ) After completing the air purge, set DIP SW 5-1 and 5-2 to off.
Indoor unit (Example: PEFY-WP-VMA-E)
Install a non-return valve to prevent water in the water circuit
flowing back to the water supply pipe, or remove the water
supply hose after the air vent operation.
LED and DIPSW positions
SYSTEM DESIGN
The operation is performed while air is
discharged from the water pipe. [Air0 to Air1]
Debris in the pipe will accumulate into the
strainer by operating all indoor units. [Air2 to AirE]
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