Airwell PAC BT Series, Installation And Operating Manual

Page: 19 / 112

17
3 - WATER CONNECTIONS
3.3 DOMESTIC HOT WATER TANK CHARGE
Maximum DWH system pressure 6 bar
DWH saftey valve setting 6 bar
1. Before charging, position the systems general switch in
the 'off' position .
2. Check that the draining taps of the system DWH are
closed (
C
).
3. Start the filling opening the water loading tap ( I.A. - see
hydraulic connection schema page 15)
4. Open taps (
10-1-2
)
5. Check the hydraulic seal of the joints.
3.4 SYSTEM CHARGE HEATING / COOLING
1. Check that the draining taps of the system are closed (
D-
F
).
2. Start the filling opening the tap (
A -
see page 15)
3. Open taps (
3 - 4
)
4. Open all of the bleeding valves of the related terminals or
radiators
5. When water begins to exit from the bleeding valve, close
and continue the charging until the pressure intended for
the system (max.3 bar)
6.
Check the hydraulic seal of the joints. Repeat the
operation after the unit has operated for a number of
hours and periodically control the system pressure.
Reintegration is carried out when the unit is off (pump
OFF).
3.2 - WATER FEATURES
C
D
F
Water features

confirming to local regulations

Water hardness (CaCo
3
) between 10°f and 25°f

Langelier (I
L
) index between 0 and +0.4

within the limits indicated by table
The water quality must be checked by qualified personnel.
Hardness
If the water hardness is high install a system suitable to
preserve the unit from harmful deposits and limestone
formations.
Cleaning
Before making the water connections to unit clean carefully
the system with specific and effective products for removing
residues or impurities that could affect the operation.
The existing systems must be free from sludgs, contaminants
and protected against foulings.
Exclusions
The warranty does not cover damages caused by limestone
formations, deposits and impurities from the water supply
and / or failure from failed system clearing to clean system.
Water component for corrosion limit on Copper
PH 7,5 ÷ 9,0
SO
4
--
< 100 ppm
HCO
3
-
/ SO
4
--
> 1
Total Hardness 4,5 ÷ 8,5 dH
Cl- < 50 ppm
PO
4
3-
< 2,0 ppm
NH3 < 0,5 ppm
Free Chlorine < 0,5 ppm
Fe
3
+
< 0,5 ppm
Mn
++
< 0,05 ppm
CO
2
< 50 ppm
H
2
S < 50 ppb
Temperature < 65 °C
Oxygen content < 0,1 ppm
Fill the Domestic Hot Water tank (DHW) only during the unit
start-up.
If the house is not immediately lived ,or the unit is turned off
for long periods, empty the storage tank to avoid the
stagnation of the water, or with temperatures close to 0°C the
risk of freeze.
See the Maintenance section for drain