Acson international E Serie Manuel D'installation page 19

SPECIAL PRECAUTIONS WHEN CHARGING UNIT
1. Charging procedures – Single phase compressors
Evacuate the system to 500 microns Hg. (67Pa). To reduce evacuation time, use short, large diameter hoses and connect to
unrestricted service ports on the system. Quality of vacuum cannot be determined by time – a reliable vacuum gauge must
be used. (etc. electronic vacuum gauge)
Turn the refrigerant cylinder upside down, purge the charging hose and charge liquid through the liquid line charging port
until refrigerant no longer flows or until the correct charge has been weighed in. If additional charge is required start the
system and slowly bleed liquid into the suction side until the system is full.
Copeland recommends charging liquid in a CONTROLLED manner into the suction side until the system is full.
This recommendation does not hold true for reciprocating compressors where liquid charging into the suction side could
cause severe damage.
Carefully monitor the suction and discharge pressures – ensure that the suction pressure does not fall below 25 psig (1.7
bar) at any time during the charging process.
• Manifold Gauge will show cylinder pressure rather than suction pressure if the cylinder valve and Manifold
valve "A" are both open.
A
2. 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 (Model: ZR90 to ZR19M) 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 Specification
• 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
All manuals and user guides at all-guides.com
! CAUTION
There are many ways of charging liquid in a "controlled manner" into the suction
side:-
1. Use valve A on the manifold gauge set
2. Use the valve on the refrigerant cylinder
3. Charge through a Shredder valve
4. Use a hose with a Shredder valve depressor
5. Charge into the suction side at some distance from the compressor
6. All of the above
ACCESSORY PARTS
Air Discharge
Air Discharge
1-17
Possible Opening Dimension For Duct Connection
10 50 50 50 50 50
115 20 115
Air Discharge Knock Out Hole
PCD Ø140
10
Ø100
Air Intake
Knock Out Hole