5
MQH 11/08
2.1
PRELIMINARY CHECK
The checks listed below shall be performed before start-
ing the unit.
• Check the section of power supply and grounding
cables; make sure that terminals are tightened and
check the correct operation of contactors, with the
master switch open.
• Check that any voltage and phase variation in the
power supply dose not exceed the prefixed thresholds.
• Check that the components of the external water circuit
(user equipment, filters, power supply tank and reser-
voir, if any) have been installed properly, and accord-
ing to the manufacture’s instructions.
• Check the filling of the hydraulic circuits, and make
sure that the fluid circulation is correct, without any
trace of leaks and air bubbles.
• Check that the direction of rotation of the pumps is cor-
rect, and that fluids have been circulating for at least
4 hours. Then, clean the filters on the suction side of
the pumps.
• Adjust the liquid distribution network in such a way
that the flow rate is within the specified range.
• Check that the water quality is up to the specifications.
• Check that oil heaters, if any, have been turned on at
least 4 hours before (it is mandatory if the temperature
is under 15 °C).
2.2
BEFORE START-UP
Before you start-up the unit, you must check the DIP switch
setup.
1
U BMS
MODBUS
ON
2
Not used
OFF
3
No auto restart
Auto Restart after power failure
OFF
4
No OAT compensation
OAT compensation
ON
5
Cooling only unit
Heatpump unit
ON
6
No auto fan
Auto FAN
OFF
7
Pump ON when unit is ON
Pump always ON
OFF
8
Refrigerant R 407C
Refrigerant R 410A
ON
DIP NO.
POSITION OFF
POSITION ON
FACTORY
SETUP
DIP SWITCH CONFIGURATION
** Turn ON the main switch of the power line.
