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HYDRAULIC CIRCUIT
12.3. INSTALLATION PROCEDURE
1. Connect the water piping to the indoor unit.
CAUTION:
When connecting the water piping to the indoor unit, is
necessary install 500mm of flexible water piping from the
indoor unit, in order to avoid metal expansion problems due
to temperature. After these 500mm install copper Piping.
Flexible water piping.
(Field supplied)
System safety
valves
NOTE:
The maximum piping lenght depends on the maximum
pressure availability in the water oulet pipe. Please check
the pump curves.
12.4. HYDRAULIC SCHEME
Outdoor Unit
PMML138A_R1-eng-fre.indb 32
2. Place the two valves, first in the water oulet pipe and second
3. Charge the water system introducing the water trough the
4. Put the drain pipe from the automatic drain valve until the
12.3.1. ADJUSTING THE WATER FLOW
The pump that is integrated in the hydraulic module has 3
speeds (2 of these can be used).
The maximum speed is factory setting.
Check valve and hose
(Factory supplied)
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Water inlet
Filter
Copper water piping
Hydraulic
separator
in inlet AquaFREE pipe.
filling valve. The nominal water pressure in the system must
be between 1.7~2.0 bar (recommended 1.8 bar).
general drain system. This securety drain valve will be
activated when water pressure arrives to 3 bars.
Pump speed
selector
Speed indications:
I-
Low Speed
II-
Medium Speed
III- High Speed
NOTE:
Never use the Low speed level.
2nd Temp control
SWP Plate HEX
Boiler
PMML0138A-rev.1 - 11/2009
III
I
II
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19/11/2009 14:45:52
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