Table of Contents
[ IX Troubleshooting ]
[10] Instructions for the air vent operation
This operation removes the air that remains after water is supplied to the water circuit.
Perform this operation after completion of water- and refrigerant-piping work, air tightness test, evacuation
of refrigerant circuits, and refrigerant charging (and debris removal, if performed).
1.Preparation for the air vent operation
1.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.
HBC controller
2.Turn on the breaker, and then open the air vent valves on the HBC controller and the indoor units.
Refer to 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.)
3.Supply water from the suction pipe on the HBC controller.
4.Check that water comes from each air vent valve, and perform the air vent operation.
2.Air vent operation
1.Set DIPSW4-3 from OFF to ON.
2.The LED will indicate "Air1" "Air2" "Air3" "Air4" and "AirE" in order over a period of up to 140 minutes, and after 140
minutes have passed, the water pump will stop.
3.Set the dipswitch 4-3 from ON to OFF.
4.Close the all air vent valves.
5.Stop the water supply.
3.Checking for the presence of residual air
1.Set DIPSW4-5 from OFF to ON, and operate the water pump.
2.If there is residual air in the circuit, it will be noisy. Check for water leaks from the pipe, and then, perform the air
vent operation again.
Flowchart for air vent operation (DIPSW4-3 is ON.)
Intermittent operation of water pump (20 min)
Step 1
Operation of all indoor units (20 min)
Step 2
Operation of individual indoor unit (10 min per one branch)
Step 3
Heating operation of all indoor units (20 min)
Step 4
( 1 ) The operation can be forced to stop by setting DIPSW4-4 from OFF to ON.
( 2 ) If it is found during any step that air ventilation has not been completed to the desired degree, go back to Step 2-1.
( 3 ) If Error appears on the LED, turn off the breaker, turn it back on, and start over at Step 2-1.
4.End processing
Set the dipswitches 5-1 and 5-2 to OFF after completion of air vent operation.
HWE1113B
Indoor unit (Example: PEFY-WP-VMA-E)
Install a non-return valve to prevent water in the water circuit
flooding back to the water supply pipe, or remove the water
supply hose after the air vent operation.
LED and DIPSW positions
- 241 -
The operation is performed while air is
discharged from the water pipe. [Air1]
The residual air will be roughly removed
by operating all indoor units. [Air2]
The residual air will be removed by operating
indoor units for each branch. [Air3]
The saturated air in the circulating water will be
removed by performing heating operation for all
indoor units and raising the temperature of the
circulating water. [Air4 to AirE]
GB
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