Standard Operating Conditions; Auto Random Re-Start Function - McQuay D Serie Manual De Instalación

• 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.
Cooling
Temperature
Minimum indoor
temperature
Maximum indoor
temperature
Minimum outdoor
temperature
Maximum outdoor
temperature
Ts: Dry bulb temperature.
• Disconnect from the main power supply before servicing the air conditioner unit.
• DO NOT pull out the power cord when the power is ON. This may cause serious electrical shocks which may result
in fire hazards.
If there is a power cut when the unit is operating, it will automatically resume the same operating mode when the power is restored.
(Applicable only to units with this feature)
• Before turning off the power supply, set the remote controller's ON/OFF switch to the "OFF" position to prevent the
nuisance tripping of the unit.
If this is not done, the unit's fans will start turning automatically when power resumes, posing a hazard to service
personnel or the user.
!
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

STANDARD OPERATING CONDITIONS

Ts °C Th °C
16 11
32 23
16 11
46 24
Th: Wet bulb temperature.
!

AUTO RANDOM RE-START FUNCTION

CAUTION
Heating
Temperature
Minimum indoor
temperature
Maximum indoor
temperature
Minimum outdoor
temperature
Maximum outdoor
temperature
Warning
!
Caution
1-14
Ts °C Th °C
16 -
30 -
-5 -6
24 18