Carrier 50EH 1100, Инструкции по установке, эксплуатации и обслуживанию, Страница: 27 / 36

27
● All the units are equipped with scroll type compressors and a
phase control relay. Verify that they rotate in the correct sense
and, if not, reverse the power wires.
WICHTIG: WIEDERBEHEIZUNG DER
OLWANNE
IMPORTANT: CRANKCASE HEATING
IMPORTANT: SURCHAUFFE CARTER D’HUILE
IMPORTANTE: RISCALDARE IL CARTER
DELL’OLIO
IMPORTANTE: RECALENTAMIENTO DE
ACEITE DEL CÁRTER
KOENNEN.
TO ALLOW THE COMPRESSOR(S) STARTING
AU PREMIER DÉMARRAGE OU APRÈS UNE ABSCENCE
TENSION 24 HEURES AVANT D’AUTORISER LE
DÉMARRAGE DU(DES) COMPRESSEUR(S).
AL PRIMO AVVIAMENTO U DOPO UNA INTERRUZIONE
PROLUNGATA DELLA ALIMENTAZIONE ELETTRICA,
LASCIARE LA MACCINA SOTTO TENSIONE PER 24 ORE
PRIMA DI AUTORIZZARE L’AVVIAMENTO DEL(DEI)
COMPRESSORE(I).
ANTES DEL PRIMER ARRANQUE O DESPUÉS DE UNA
AUSENCIA DE CORRIENTE POR UN LARGO PERIODO DE
TIEMPO, CONVIENE QUE LA UNIDAD ESTÉ CONECTADA
UN MÍNIMO DE 24 HORAS.
BEIDER ERSTEN INBETRIEBSETRUNZ ORDER NACH EINER
LANGEN STROMUNTER-BRECHUNG BRINGEN SIE DIE
MASCHINE UNTER SPANNUNG 24 STRUNDERLANG
BEVOR SIE DEN(DIE) KOMPRESSOR(EN) EINSCHALTEN
FOR THE FIRSTSTART OR AFTER ALONG TIME OUT OF
VOLTAGE PUT THE MACHINE ON LIVE 24 HOURS BEFORE
DE COURANT PROLONGÉE, METTRE LA MACHINE SOUS
COMPRESOR SCROLL.
COMPROBAR SENTIDO DE GIRO
COMPRESSEUR SCROLL.
VÉRIFIER LE SENS DE ROTATION
SCROLL COMPRESSOR.
CHECK SENSE OF ROTATION
Control of the refrigerant charge
Models 415 and 480
13 - COMMISSIONING
13.1 Checks prior to commissioning
● It is advisable to make a complete sketch of the installation
including the location of the unit and all the components used.
This will be very helpful for maintenance and repairs to the
installation.
● The following must be verifi ed:
- That the electrical power supply remains constant and that
it corresponds to that featured on the unit data plate.
- That the electric installation has been carried out according
to the electric wiring diagram provided with the unit (consult
the chapter on “Electrical connection”).
- The correct connection of the sensors supplied with the unit
(consult the chapter on “Electrical connection”).
- That they are no cables close to heat sources.
● Once the above verifi cations have been carried out, the control
circuit is supplied with voltage by the automatic control switch.
Attention: the compressor crankcase heater must be put
under voltage for 24 hours before starting the compressor.
Important: As a safety feature to ensure heating of the
crankcase heater, if there is a power cut lasting over 2 hours,
the compressors will be locked. The unit must be powered for
8 hours to unlock them. The pGD1 terminal unit display will
shows the time remaining until they can be unlocked.
● Each unit is shipped with an exact charge
of refrigerant for proper operation.
R 410A
● To make sure that the unit is fi lled with the correct charge of
refrigerant, check the values of overheating and subcooling,
circuit by circuit, with the system running at full capacity.
If the refrigerant charge is lower than required, the suction
pressure will drop and overheating on the compressor inlets
will be high. This can cause an interruption in operation due
to activation of the refrigerant charge safety device.
To adjust the refrigerant charge, a schrader type valve is built
into the unit on the liquid line for each circuit. This changing
valve is located inside the compressor box.
● Verify the absence of any leaks of the refrigerant. In case of
a leak:
- Completely drain the refrigerant charge using a specifi c
recovery machine for R-410A and repair the leak.
- Next, reload the refrigerant into the unit according to charge
data provided in a table of the chapter on “Maintenance”
and in the unit’s data plate.
- Add the refrigerant via the charging valve using the
appropriate equipment and tools, with the compressors
stopped, monitoring the pressures to control any anomaly.
● Check the unit operation and verify the safety devices.
Access to the compressors
enclosure of circuit 1 and
recovery circuit (optional)
Note: in units with 4 circuits:
access to the circutis 1 and 2
Access to the compressors
enclosure of circuit 2
Note: in units with 4 circuits:
access to the circutis 3 and 4