Mitsubishi MXZ-4E80VAD - Purging Procedures, Leak Test, and Test Run

En-6
4-1. PURGING PROCEDURES AND LEAK TEST
4-2. GAS CHARGE
Performgaschargetounit.
1)Connectgascylindertotheserviceportofstopvalve.
2)Performairpurgeofthepipe(orhose)comingfromrefrigerantgascylinder.
3)Replenishspeciedamountoftherefrigerant,whileoperatingtheairconditioner
for cooling.
Note:
Incaseofaddingrefrigerant,complywiththequantityspeciedfortherefrigerat-
ing cycle.
CAUTION:
Whenchargingtherefrigerantsystemwithadditionalrefrigerant,besuretouse
liquidrefrigerant.Addinggasrefrigerantmaychangethecompositionoftherefriger-
antinthesystemandaffectnormaloperationoftheairconditioner.Also,charge
theliquidrefrigerantslowly,otherwisethecompressorwillbelocked.
Tomaintain the high pressure of the gas cylinder,warm the gas cylinder with
warmwater(under40°C)duringcoldseason.Butneverusenakedreorsteam.
1)Removeserviceportcapofstopvalveonthesideoftheoutdoorunit
gaspipe.(Thestopvalvesarefullyclosedandcoveredincapsintheir
initialstate.)
2)Connectgaugemanifoldvalveandvacuumpumptoserviceportofstop
valveonthegaspipesideoftheoutdoorunit.
3)Runthevacuumpump.(Vacuumizeformorethan15minutes.)
4)Checkthevacuumwithgaugemanifoldvalve,thenclosegaugemanifold
valve,andstopthevacuumpump.
5)Leaveasitisforoneortwominutes.Makesurethepointerofgauge
manifoldvalveremainsinthesameposition.Conrmthatpressuregauge
shows-0.101MPa[Gauge](-760mmHg).
6)Removegaugemanifoldvalvequicklyfromserviceportofstopvalve.
7)Fullyopenallstopvalvesonthegaspipeandtheliquidpipe.Operating
withoutfullyopeninglowerstheperformanceandthiscausestrouble.
8)Referto1-2.,andchargetheprescribedamountofrefrigerantifneeded.
Besuretochargeslowlywithliquidrefrigerant.Otherwise,composition
oftherefrigerantinthesystemmaybechangedandaffectperformance
of the air conditioner.
9)Tightencapofserviceporttoobtaintheinitialstatus.
10 )Leaktest
Stopvalve
forGAS
Gaugemani-
foldvalve(for
R410A)
Compoundpressure
gauge(forR410A)
–0.101MPa
(–760mmHg)
Handle
Low
HandleHigh
Vacuumpump
(forR410A)
Chargehose
(forR410A)
*Close
*Open
Hexagonal
wrench
*4to5turns
Stopvalve
forLIQUID
Pressuregauge
(forR410A)
Precautionswhenus-
ingthecontrolvalve
Whenattachingthecontrolvalve
totheserviceport,valvecoremay
deformorloosenifexcesspres-
sureisapplied.Thismaycause
gasleak.
Serviceport
Chargehose
(forR410A)
Body Close
Open
Controlvalve
A
Whenattachingthecontrolvalveto
theserviceport,makesurethatthe
valvecoreisinclosedposition,and
then tighten part A. Do not tighten
partA orturnthe bodywhen valve
coreisinopenposition.
Union
Stopvalve
Liquid
pipe
Indoor
unit
Stopvalvewith
serviceport
Gas
pipe
Refrigerant gas
cylinder
operatingvalve
(forR410A)
Gaugemanifold
valve(forR410A)
Chargehose
(forR410A)
RefrigerantgascylinderforR410Awithsiphon
Electronic scale for refrigerant charging
Refrigerant(liquid)
Outdoor
unit
Union
Union
Union
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
Serviceportcap
(Torque13.7to
17.7N•m,140to
180kgf•cm)
Stopvalvecap
(Torque19.6to
29.4N•m,200
to300kgf•cm)
Model Indoor unit
MXZ-5E100VAD
A
–
E
MXZ-4E80VAD
A
–
D
4-3. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
COOL/DRY HEAT
• Descriptionofthefunction:
 Withthisfunction,oncetheoperationmodeislockedtoeitherCOOL/DRYmode
orHEATmode,theairconditioneroperatesinthatmodeonly.
* Changingthesettingisrequiredtoactivatethisfunction.Pleaseexplainabout
thisfunctiontoyourcustomersandaskthemwhethertheywanttouseit.
[How to lock the operation mode]
1)Besure toturn offthe mainpower forthe airconditioner beforemaking the
setting.
2)Setthe“3”ofSW1ontheoutdoorcontrollerboardtoONtoenablethisfunction.
3)Tolockthe operationmodein COOL/DRY mode,setthe “4”ofSW1 on the
outdoorcontrollerboardtoOFF.TolocktheoperationinHEATmode,setthe
sameswitchtoON.
4)Turnonthemainpowerfortheairconditioner.
SW1
ON
1 2 3 4 5 6
SW1
ON
1 2 3 4 5 6
LED
SW1
SW871
SW2
WG79A696H02_en.indd 6 2016/04/21 14:46:40