Purging Procedures, Leak Test, And Test Run - Mitsubishi Electric MSZ-DW25VF Installation Manual

3-3. PIPE CONNECTION
• Fasten are nut with a t r ue wrench as s eci ed in the ta le
• When astened t tight are nut may reak a ter a l ng eri d and cause re rigerant
leakage
• e sure t wra insulati n ar und the i ing
result in urns r r st ite
Indoor unit connection
nnect th li uid and gas i ings t ind
• ly a thin c at re rigerati n il (J) n the ared ends
re rigerati n il n screw threads
the screw
• F r c nnecti n rst align the center then tighten the rst 3 t
• se tightening t r ue ta le a e as a guideline
and tighten using tw wrenches
mm r less
Outdoor unit connection
nnect i es t st al e i e int
ind r unit
• F r tightening use a t r ue wrench r s anner and use the same tightening t r ue
a lied r ind r unit
When installing the unit, securely connect the refrigerant pipes before starting
the compressor.

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-1. PURGING PROCEDURES AND LEAK TEST
) em e ser ice rt ca st al e n the side
al es are ully cl sed and c ered in ca s in initial state )
) nnect gauge mani ld al e and acuum um t ser ice
i e side the utd r unit
al e stem (inside)
t al e ca
( r ue t
l se
•m
en
t 3 kg •cm)
He ag nal wrench
er ice rt ca
( r ue 3 t
•m t
8 kg •cm)
Precauti ns when using the c ntr l al e
<R32>
en
ake sure t re
l se
lace the ca a ter
al e
the erati n
irect c ntact with the are i ing may
r unit
the i es
cessi e tightening t r ue will result in damage n
turns
r ind r unit side uni n
cessi e tightening damages the are secti n
the utd r unit in the same manner a
WARNING
the utd r unit gas i e ( he st
rt st
m und ressure gauge
Pa
( r 3
( mmHg)
Pressure gauge
( r 3
t al e
r I I
Gauge mani ld al e
( r 3
Handle
w Handle High
harge h se
t al e r
( r 3
G
da ter r
re enting the
ack w
acuum um ( r the acuum
um with the uncti n t
re ent the ack
When attaching the c ntr l al e
t the ser ice rt al e c re may
de rm r l sen i e cess ressure
is a lied his may cause gas leak
When attaching the c ntr l al e t
er ice rt the ser ice rt make sure that the
al e c re is in cl sed
then tighten art
dy
art r turn the dy when al e
harge
ntr l
h se
c re is in en siti n
3-4. INSULATION AND TAPING
) er i ing
) F r utd r unit side surely insulate e ery i ing including al es
3) sing i ing ta e (G) a
• t the end
• When i ing ha e t
and humidity are high wind additi nal c mmercially s ld insulati n t
c ndensati n
n t a ly
are nut y hand
int secti n
lied r
3) un the acuum um
) heck the acuum with gauge mani ld al e then cl se gauge mani ld al e and st
the acuum um
al e n the gas
) ea e as it is
in the same
mmHg)
)
) em e gauge mani ld al e uickly r m ser ice
)
)
To avoid risk of re, make sure that there are no ammable ha ards or ignition
risks before opening the stop valves.
)
) ter re rigerant i es are c nnected and e acuated ully
al es n th sides
stem hits the st
the er rmance and this causes tr u le
8) e er t 3 and charge the rescri ed am unt
sl wly with li uid re rigerant
w)
e changed and a ect er rmance
) ighten ca
) eak test
4-2. TEST RUN
) Insert wer su
reaker
) Press the
siti n and
est run will e er rmed
n t tighten
erati n indicat r links e ery
utd r unit c nnecting wire ( )
emergency m de (set tem erature
3) st erati n
lam s turn
) hecking the rem te (in rared) signal rece ti n
• Press the
check that an electr nic s und is heard r m the ind
Press the
• nce the c m ress r st
erates s the c m ress r will n t
r tect the air c nditi ner
ints with i e c er
ly ta ing starting r m the entry
i ing ta e (G) with ta e (with adhesi e agent attached)
e arranged thr ugh a e ceiling cl set r where the tem erature
( acuumi e until micr ns is achie ed )
r ne r tw minutes ake sure
siti n n rm that ressure gauge sh ws
WARNING
gas i e and li uid i e y the he ag nal wrench I the al e
er d n t turn it any urther
re rigerant i needed
therwise c m siti n
the air c nditi ner
ser ice rt t tain the initial status
ly lug int the wer utlet and r turn n the
W nce r and twice r H
r 3 minutes I the u er lam
sec nds ins ect the ind
r mis wiring ter the test run
) will start
ress the W se eral times until all
e er t erating instructi ns r details
FF utt n n the rem te c ntr ller (3) and
FF utt n again t turn the air c nditi ner
s the restart re enti e de ice
erate r 3 minutes t
utd r unit
re ent
inter gauge mani ld al e remains
Pa Gauge (
rt st al e
en the al e stem all st
erating with ut ully ening l wers
e sure t charge
the re rigerant in the system may
erati n
the
r
mergency erati n
switch ( W)
r unit