Daikin RXF50B2V1B User Manual

7 | Piping installation
Installer reference guide
43
ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B +
RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B
R32 split series
4P513661-9J – 2020.05
7.3.3 To check for leaks
NOTICE
Do NOT exceed the unit's maximum working pressure (see "PS High" on the unit
name plate).
NOTICE
Make sure to use a recommended bubble test solution from your wholesaler. Do not
use soap water, which may cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping gets cold), and/or lead to
corrosion of flared joints (soap water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
1 Charge the system with nitrogen gas up to a gauge pressure of at least
200kPa (2bar). It is recommended to pressurize to 3000kPa (30bar) in order
to detect small leaks.
2 Check for leaks by applying the bubble test solution to all connections.
3 Discharge all nitrogen gas.
7.3.4 To perform vacuum drying
DANGER: RISK OF EXPLOSION
Do NOT start the unit if it is vacuumed.
Connect the vacuum pump and manifold as follows:
i
h
j
a
b
c
h
k
d
f
f
e
g
a Low pressure gauge
b Gauge manifold
c High pressure gauge
d Low-pressure valve (Lo)
e High-pressure valve (Hi)
f Charging hoses
g Vacuum pump
h Valve caps
i Service port
j Gas stop valve
k Liquid stop valve
1 Vacuum the system until the pressure on the manifold indicates −0.1 MPa
(−1bar).
2 Leave as is for 4-5minutes and check the pressure:
If the pressure… Then…
Does not change There is no moisture in the system.
This procedure is finished.

Daikin RXF50B2V1B Specifications

General

Brand	Daikin
Model	RXF50B2V1B
Category	Air Conditioner
Language	English