2 .7 .3 Additional charge
50 g of R410A
per additional meter
Length of
the connections
15 m
20 m max.
Additional charge
none
250 g
The charge in the outdoor units corresponds to the
maximum distances between the outdoor unit and the
hydraulic unit defined in
page 18
. If the distances
are greater, an additional charge of R410A is required.
The additional charge depends on the distance
between the outdoor unit and the hydraulic unit for
each type of appliance. The additional charge of R410A
must necessarily be made by an approved refrigeration
engineer.
• Example of additional charge :
An outdoor unit 17 m away from the hydraulic unit will
require an additional charge of :
Additional charge = (17 - 15) x 50 = 100 g.
The charge must be introduced after creating the
vacuum and before the hydraulic unit is filled with gas,
as follows :
- Disconnect the vacuum pump (yellow hose) and
connect a bottle of R410A instead
in the liquid
extraction position
- Open the bottle’s valve.
- Bleed the yellow hose by loosening it slightly on the
Manifold
side.
- Place the bottle on scales with a minimum accuracy
of 10 g. Note the weight.
- Carefully open the blue valve slightly and check the
value shown on the scales.
- As soon as the value displayed has dropped by the
value for the calculated additional charge, close the
bottle and disconnect it.
- Then rapidly disconnect the hose connected to the
appliance.
- Proceed to fill the hydraulic unit with gas.
"
Warning
• Only use R410A !
• Only use tools suitable for R410A
(set of manometers).
• Always charge in the fluid phase.
• Never exceed the length or the maximum difference
in level.
R410A
figure 21 - "Gas" bottle R410A
Gas
Liquid
DIP SW
Interface card
LED2
(green)
LED1
(red)
OFF
ON
figure 20 - Location of DIP switches and diodes
on the hydraulic unit interface card
2 .7 .4
Pump down operation (Refrigerant collecting
operation) outdoor unit
Perform the following procedures to collect the
refrigerant.
-
1
- Turn OFF the start/stop switch
(ref.
3
,
figure 7, page 10
).
-
2
- Remove the front panel.
Then turn ON the DIP SW 1 on the interface card.
-
3
- Turn ON the start/stop switch.
(Green and Red LED on the board start flashing ;
1 sec. on / 1 sec. off repeated).
-
4
- The outdoor unit begins cooling operation
about
3
minutes
after
switching
ON.
Close the "Liquid" valve on the outdoor unit 1 minute
after operation starts.
-
5
- Close the "Gas" valve on the outdoor unit
1-2 minutes after closing the "Liquid" valve, while the
outdoor unit keeps running.
-
6
- Disconnect the power supply.
Remarks :
- Make sure to turn OFF the start/stop switch before
touching DIP SW.
- The pump down operation cannot be activated even
if DIP SW is changed while heat pump's power is on.
- Do not forget to turn back DIP SW 1 on the interface
card to OFF, after the pump down operation has been
completed.
- When the pump down operation is repeated,
temporarily turn OFF the start/stop switch after opening
the closed valves (both "Liquid" and "Gas").
- Then turn ON the start/stop switch again after
2-3 minutes and perform the pump down operation.
Installation and operating manual "1572 - EN"
- 21 -
Heat pump air/water split 2 services alféa excellia duo
