Air Purge - Mitsubishi SRK10CRV-S Technical Manual & Parts List

Air purge

① Tighten all flare nuts in the pipings both indoor
and outside wall so as not to cause leak.
② Connect operation valve, charge hose, manifold
valve and vacuum pump as is illustrated right.
③ Open manifold valve handle Lo to its full
width, and perform vacuum or evacuation.
Continue the vacuum or evacuation operation
for 15 minutes or more and check to see that
the vacuum gauge reads -0.1MPa.
④ After completing vacuum operation, close the
Lo handle and stop operation of the vacuum
pump.
⑤ After completing vacuum operation, fully
open operation valve (Both gas and liquid
sides) with hexagon headed wrench.
⑥ Check for possible leakage of gas in the
connection parts of both indoor and outdoor.
Since the system uses check joints differing in diameter
from those found on the conventional models, a charge hose
(for R22) presently in use is not applicable. Please use one
designed specifically for R410A.
Please use an anti-reverse flow type vacuum pump adapter
so as to prevent vacuum pump oil from running back into
the system. Oil running back into an air-conditioning system
may cause the refrigerant cycle to break down.
Models SRK10CRV-S
SRK13CRV-S
SRK10CRS-S, S3, S4, S5, S6
SRK13CRS-S, S3, S4, S5, S6
Additional refrigerant charge
When refrigerant piping exceeds 5m conduct additional refrigerant charge after refrigerant sweeping.
5m over 15m: Additional charge amount per meter = 10g/m
[Example]
How much amount of additional charge for 15m piping?
(15 - 5)m × 10g/m = 100g
100g for additional charge
Models SRK10CRV-S1
SRK13CRV-S1
SRK10CRS-S1, S2
SRK13CRS-S1, S2
Additional refrigerant charge
When refrigerant piping exceeds 7.5m conduct additional refrigerant charge after refrigerant sweeping.
7.5m over 15m: Additional charge amount per meter = 10g/m
[Example]
How much amount of additional charge for 15m piping?
(15 - 7.5)m × 10g/m = 75g
75g for additional charge
Insulation of connecting portion
① Cover the connection portion of the refrigerant piping with the pipe
cover and seal them.
If neglecting to do so, moisture occurs on the piping and water will
drip out.
② Finishing and fixing
ⓐ Tie up the piping with wrapping tape, and shape it so that it
conforms to which the pipe is attached.
ⓑ Fix them with clamps as right figure.
Operation valve cap
Operation valve
-0.1MPa
(two-way valve)
(-76cmHg)
Handle Lo
Operation valve
(three-way valve)
Operation valve
cap
Check joint
Charge hose (Designed specifically for R410A)
Securely tighten the operation valve cap and the check joint blind nut
after adjustment.
Operation valve size Operation valve cap
(mm) tightening torque (N·m)
6.35 (1/4")
20 ~ 30
9.52 (3/8")
12.7 (1/2") 25 ~ 35
15.88 (5/8") 30 ~ 40
To cover the connecting portion with
insulation materials, cut upper portion
Vinyl tape
and then seal it with insulation
Insulation
Refrigerant piping
Electrical wiring
Covering tape
Drain hose
Tapping screw

- -
'15 • SRK-T-172
Compound pressure gauge
Pressure gauge
Gauge manifold
(Designed specifically
for R410A)
Handle Hi
Charge hose
(Designed specifically for R410A)
Vacuum pump adapter
(Anti-reverse flow type)
(Designed specifically for R410A)
Vacuum pump
Check joint blind nut
tightening torque (N·m)
10 ~ 12
materials.
Cover the exterior portion
with covering tape and shape
the piping so it will match the
contours of the route that the
piping to take. Also fix the
wiring and pipings to the wall with
clamps.