A Checking And Starting Up The Uni; Starting Up For The First Time - Baxi PBM-i 20 Manual Del Usuario

CHECKING AND STARTING UP THE UNIT
CHECKS BEFORE STARTING THE UNIT
• the vibration damping feet are fitted
• inlet filters are fitted on the system and domestic hot water
circuits
• suitably-sized expansion vessel and safety valve installed
on the DhW circuit
• an expansion vessel is installed if the expansion vessel on
the unit is undersized
• make sure vibration damper joints (supplied with the unit)
are installed on water connections
• a low-loss header is installed if the water content is insuffi-
cient
PREPARING FOR FIRST START UP
The unit must be started up for the first time by the Techni-
cal Service. Before starting up the unit, make sure that:
• the unit has been properly installed as described in this
manual
• All safety conditions have been respected;;
• The unit is adequately fixed to the surface it rests on;
• Clearances have been respected;
• Water connections have been carried out as indicated in
the instruction manual;
• All water connections are tight.
• Make sure the water circuit has been washed and drained.
• The water circuit is filled and vented.
• Make sure there is no air in the system. If necessary vent
the system using the vent valve.
If venting after operation in heat pump mode, be careful as
the water may be hot;
• The water valves are open;
• Electrical connections have been carried out correctly;

STARTING UP FOR THE FIRST TIME

Before starting the unit:
• Make sure the switch QF1 is in the OFF position, Fig. 1.
• Make sure the contact of the on/off device SA1 (see the
wiring diagram) is open (if featured).
• Make sure the "A5" room controller is off.
• Position the main unit switch QS1 in the ON position, Fig.
2.
• Move switch QF1 (outside the unit) to "ON", Fig. 3.
38 PBM 20÷40 EN
• make sure the position of the outside air probe corre-
sponds to the instructions shown in the manual
• make sure the position of the room control unit corre-
sponds to the instructions shown in the manual
• make sure that the electrical power available is adequate
for the unit installed
• make sure the non-return valve is installed on the DhW
circuit
• Voltage is within a tolerance of 10% of the rated voltage
for the unit;
• Make sure that unbalance between phases is less than
2%, for three-phase units.
• The unit is correctly earthed;
• All electrical connections are tight.
• make sure that the outside air and water temperature are
within the unit operating limits shown in this manual.
Before starting up, power up the unit for at least two hours
by switching QF1 and QS1 to ON (see the wiring diagram)
to allow the oil in the compressor sump to heat up.
1
2
3
ON
OFF
ON
ON
OFF
A