Topping Up The Load; Service Valve - Immergas AUDAX PRO 5 Instruction And Recommendation Booklet

5.13 TOPPING UP THE LOAD.

R-410A is a blend of several coolants. For this
reason, it must be put into the chiller circuit only
in its liquid phase.
The amount of coolant to put in depends on the
length and diameters of the liquid pipes. Using
an electronic scale is recommendable to put in
the required amount of coolant.
Top-up must be done while the unit is operating
in cooling
- Connect the manometric unit and bleed the air
contained inside it.
- Open the service valve on the manifold liquid
side and put in the coolant in liquid phase.
- If it is not possible to carry out or complete the
top-up while the unit is not operating, using a
button located on the outdoor unit PCB, you
can complete the top-up.
- Topping up during operation in cooling (Fig.
5-16):
Manometric unit
Low pressure
side
Scale
Manometric unit
Low pressure
side
Scale
1 Open the valve on the gas side after 20 min-
utes of operation.
2 Open the valve on the pressure gauge mani-
fold low pressure side to complete the top-up.
-Topping up during operation in central heating
(Fig. 5-17):
1 Connect the manometric unit low side to the
intake load coupling.
2 Press the top-up in central heating mode
button.
3 Open the intake load coupling valve after 20
minutes of operation
4 Open the manometric unit low pressure side
valve to complete the top-up
Attention: after having put in the coolant, you
must completely open the liquid side valve and
the gas side valve. (Allowing the system to op-
erate when one of these valves is not completely
open could damage important components).
Intake load coupling
Outdoor unit
High pres-
sure side
Gas side
Liquid side

Service valve

Intake load coupling
Outdoor unit
High pres-
sure side
Liquid side
Gas side
Service valve
5.14 SERVICE VALVE
• Closing the valve.
1 Remove the valve cover and turn the stem
2 Tighten the stem until it is completely closed.
3 Put the valve cover back on and tighten it as
• Opening the valve
1 Remove the valve cover.
2 Turn the stem anticlockwise, using a hex key.
3 Tighten the stem until it is completely closed.
4 Put the valve cover back on and tighten it as
Attention:
When you use the service coupling, you must
also use a loading hose.
After tightening the cover, make sure no coolant
leaks from it.
When opening/closing the valve, you must use
a key and a counter key.
5-16
S e r v i c e
coupling
5-17
21 21
clockwise, using a hex key.
N.B.: do not force the stem and only use
suitable tools. Otherwise, the contact surface
between the shutter and its housing could be
damaged, with subsequent coolant leakage.
If you notice coolant leaking, you must open
the valve slightly, close it again and make sure
there is no more leaking. If that is the case,
the stem can then be tightened definitively.
required.
required.
Cover
Stem
surface
Seal
5-18