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1
Quick installation guide
1.5
Instructions for installation and connection of the unit
1. Connect the vacuum pump to the service valves
-1- on the installation and connect the service
manometers to the valve stems (¼" valves) -2- in
the circuit.
2. Open the stopcocks on the service valves and the
vacuum pump.
3. Activate the vacuum pump.
4. Vacuum to at least 50 microns.
5. Detect leaks.
Coolant charge
D A N G E R
Due to its characteristics, R-410A coolant must only be handled by qualified personnel.
N O T E
The unit is not supplied charged
The refrigerant charge is calculated for a 7,5 m length of piping. In installations with longer (or shorter)
lengths, add (reduce) coolant as indicated in the table below.
In installations with connection piping in excess of 25 m in length, 30 g of oil must be added for every
additional metre.
Follow the instructions below to add or charge coolant to the cooling pipes:
N O T E
The coolant charge must be weight-controlled using scales. The coolant must be charged in liquid phase
to ensure the components forming it are inserted in the correct proportions.
1. Connect the coolant cylinder to the low pressure or gas intake.
2. Open the stopcocks and allow the coolant to enter the pipes.
N O T E
Once the coolant has been correctly charged, the subcooling temperature (at the expansion valve inlet)
must be approximately 1 ºC and the overheating temperature between 5 and 10 ºC.
A
Liquid cooling line.
B
Gas cooling line.
H
Vertical distance between units (max. 30 m).
Total pipe length (vertical + horizontal sec‐
L
tions). Laid and in one direction.
1
Outdoor unit.
2
Indoor unit.
16
2
1
A
L
B
H
1
2
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