Optional Functions - Daikin FHC20JEVLK Installation Manual

R22 split series

Table of Contents

Charging procedures – Three phase compressors

The fundamental procedure is the same as for single phase models but the compressor can run in the wrong direction on

starting.

If this happens reverse any two phases and start again. Short term reverse rotation will not damage the compressor.

All Specter compressors have internal discharge temperature protectors which are very effective in preventing dangerously

high discharge temperatures during charging. The protection module will trip and lock the compressor out for 30 minutes.

It is not normally necessary to wait 30 minutes for the module to reset. When the compressor has cooled down the module

can be reset by breaking the power supply to the control circuit. Very often the serviceman does not understand why the

module tripped and uses a jumper wire to bypass it. He continues to charge the system and removes the jumper when

charging is complete. The compressor may or may not run with the protector back in the circuit but it is certain that the

compressor has been damaged and premature failure is inevitable.

Short Duct Speci cation

•

The indoor unit is provided with air discharge and air intake "knock-out" hole for duct connection. However the connection

of the short duct for air discharge is possible on only one side.

•

The use of short duct for air discharge will improve airflow distribution if there is an obstruction (such as a lighting fixture)

or in a long, narrow room or an L-shaped room. It also use for air conditioning of two rooms simultaneously.

Possible Direction For Air Discharge And Air Intake

Air Discharge

Air Intake

Air Discharge

NOTE

•

Avoid using the short duct on which the air discharge grille can be completely closed, to prevent evaporator

freezing.

•

In order to prevent condensation forming, be sure that there is sufficient thermal insulation and no leakage of cool air

when installing the short duct.

•

Keep the introduction of fresh air intake within 20% of total air ow. Also provide a chamber and use a booster fan.

Sealing Material

•

It is possible to seal one of the four air discharge outlet. (sealing two or more air discharge outlet could cause a

malfunction)

•

Remove the front panel and insert the sealing material into the air discharge outlet on the indoor unit to seal the air

outlet.

•

The sealing material is the same length as the longer air discharge outlet. If it is desired to seal the shorter air discharge

outlet, cut the sealing material to shorten it.

•

Push the sealing material in about 10mm beyond the bottom surface of the indoor unit so that it does not touch the air

louver. Be sure not to push the sealing material in any farther than about 10mm.

There are many ways of charging liquid in a "controlled manner" into the

suction side:-

Use valve A on the manifold gauge set

Use the valve on the refrigerant cylinder

Charge through a Shredder valve

Use a hose with a Shredder valve depressor

Charge into the suction side at some distance from the compressor

All of the above