Correct and frequent cleaning (approximately every three
MONTHS WILLPREVENTOFTHECORROSIONPROBLEMS
Protect the control box during cleaning operations.
ʾ˂ƖˆƘ½¾ÊÁ¿½Ê¹ÆÌÎÇÄÍŽ
4HEUNITMUSTBEOPERATEDINCOOLINGMODETOlNDOUTIF
the unit charge is correct, by checking the actual subcooling.
Following a small refrigerant leak a loss of refrigerant,
compared to the initial charge will be noticeable in the
cooling mode and affect the subcooling value obtained at
the air heat exchanger (condenser) outlet, but it will not be
noticeable in the heating mode.
IMPORTANT: It is therefore not possible to optimise the
refrigerant charge in the heating mode after a leak. The
unit must be operated in the cooling mode to check, if
anadditional charge is required.
ʾ˂ƖʾʽƘÀ¹Ê¹»Ì½ÊÁËÌÁ»ËǾƘˁʾʽ
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̽ÅȽʹÌÍʽƓͳ
½Ä¹ÌÁν
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-20
297
25
1552
-19
312
26
1596
-18
328
27
1641
-17
345
28
1687
-16
361
29
1734
-15
379
30
1781
-14
397
31
1830
-13
415
32
1880
-12
434
33
1930
-11
453
34
1981
-10
473
35
2034
-9
493
36
2087
-8
514
37
2142
-7
535
38
2197
-6
557
39
2253
-5
579
40
2311
-4
602
41
2369
-3
626
42
2429
-2
650
43
2490
-1
674
44
2551
0
700
45
2614
1
726
46
2678
2
752
47
2744
3
779
48
2810
4
807
49
2878
5
835
50
2947
6
864
51
3017
7
894
52
3088
8
924
53
3161
9
956
54
3234
10
987
55
3310
11
1020
56
3386
12
1053
57
3464
13
1087
58
3543
14
1121
59
3624
15
1156
60
3706
16
1192
61
3789
17
1229
62
3874
18
1267
63
3961
19
1305
64
4049
20
1344
65
4138
21
1384
66
4229
22
1425
67
4322
23
1467
68
4416
24
1509
69
4512
70
4610
UA-UH135-205 units use high-pressure R-410A
refrigerant (the unit operating pressure is above 40 bar, the
pressure at 35°C air temperature is 50% higher than for
R-22). Special equipment must be used when working on
the refrigerant circuit (pressure gauge, charge transfer,
etc.).
ʾ˂ƖʾʾƘ½ÊÎÁ»Áƿʽ»ÇÅŽƼ¹ÌÁÇÆË
s
"EFOREREPLACINGANYOFTHEELEMENTSINTHECOOLING
circuit, ensure that the entire refrigerant charge is
removed from both the high and low pressure sides of
the unit.
s
4HECONTROLELEMENTSOFTHECOOLINGSYSTEMAREHIGHLY
sensitive. If they need to be replaced, care should be
taken not to overheat them with blowlamps whilst
soldering. A damp cloth should be wrapped around
THECOMPONENTTOBESOLDEREDANDTHEmAMEDIRECTED
away from the component body.
s
3ILVERALLOYSOLDERINGRODSSHOULDALWAYSBEUSED
s
)FTHETOTALUNITGASCHARGEHASTOBEREPLACEDTHE
quantity should be as given on the nameplate and the
unit should be properly evacuated beforehand.
s
$URINGUNITOPERATIONALLPANELSSHOULDBEINPLACE
including the electrical box access panel.
s
)FITISNECESSARYTOCUTTHELINESOFTHEREFRIGERANT
circuit, tube cutters should always be used and never
tools which produce burrs. All refrigerant circuit tubing
should be of copper, specially made for refrigeration
purposes.
ʾ˂ƖʾʿƘÁƹÄʽ»ÇÅŽƼ¹ÌÁÇÆË
The unit you have purchased has undergone strict quality
control procedures before leaving the factory.
All components, including the control systems and electrical
EQUIPMENTETCARECERTIlEDBYOUR1UALITY#ONTROL$EPART
ment, and tested under the harshest possible operating
conditions in our laboratories. However, after leaving the
factory, it is possible that one or more of these elements
may be damaged due to causes beyond our control. In
such an event, the user should not work on any of the
internal components, or subject the unit to operating
CONDITIONSWHICHARENOTSPECIlEDINTHISMANUALSINCE
serious damage may result and the guarantee would be
invalidated. Repair and maintenance work should always
be left to the installer.
All recommendations concerning unit installation are
intended to be as a guideline. The installer should carry out
the installation according to the design conditions and should
comply with all applicable regulations for air conditioning
and refrigeration installations.
NOTE: The manufacturer does not accept responsibility for
any malfunctions resulting from misuse of the equipment.
55