Arcoaire WCA3 4 Manuel d'instructions d'installation - Page 11
Parcourez en ligne ou téléchargez le pdf Manuel d'instructions d'installation pour {nom_de_la_catégorie} Arcoaire WCA3 4. Arcoaire WCA3 4 14 pages. R−410a split system air conditioner
Imprimer la pageINSTALLATION INSTRUCTIONS
A. UNITS WITH COOLING MODE TXV
Units installed with cooling mode TXV require charging
by the subcooling method.
1. Operate unit a minimum of 15 minutes before
checking charge.
2. Measure liquid service valve pressure by
attaching an accurate gage to service port.
3. Measure liquid line temperature by attaching an
accurate
thermistor
thermometer to liquid line near outdoor coil.
4. Refer to unit rating plate for required subcooling
temperature.
5. Refer to Figure 13. Find the point where required
subcooling temperature intersects measured
liquid service valve pressure.
6. To obtain required subcooling temperature at a
specific liquid line pressure, add refrigerant if
liquid line temperature is higher than indicated or
reclaim refrigerant if temperature is lower. Allow a
tolerance of "3_F (|1.7_C).
B. UNITS WITH INDOOR PISTON
Units installed with indoor pistons require charging by the
superheat method.
The following procedure is valid when indoor airflow is
within "21 percent of its rated CFM.
1. Operate unit a minimum of 15 minutes before
checking charge.
2. Measure suction pressure by attaching an
accurate gage to suction valve service port.
3. Measure suction temperature by attaching an
accurate
thermistor
thermometer to suction line at service valve.
4. Measure outdoor air dry−bulb temperature with
thermometer.
SUPERHEAT CHARGING TABLE
(SUPERHEAT ˚F AT LOWSIDE SERVICE PORT)
Figure 11
Outdoor
EVAPORATOR ENTEREING AIR ˚F AT WB
Temp
˚F
50 52 54 56 58 60 62 64 66 68 70 72 74 76
9
12 14 17 20 23 26 29 32 35 37 40 42 45
55
7
10 12 15 18 21 24 27 30 33 35 38 40 43
60
6
10 13 16 19 21 24 27 30 33 36 38 41
65
7
10 13 16 19 21 24 27 30 33 36 39
70
6
9
75
5
80
85
90
95
100
105
110
115
*Optimum performance point, 95°F (35°C) outdoor ambient and (80°F / 27°C dry bulb), (67°F / 19°C wet bulb) indoor conditions. (DOE A Test Conditions)
Where a dash (--) appears do not attempt to charge system under these conditions or refrigerant slugging may occur. Charge must be weighed in.
Note: Superheat °F is at low-side service port, Allow a tolerance of ± 3°F (± 1.7°C)
Note: Indoor dry bulb between 70°F and 80°F (21°C and 27°C)
421 01 5301 02
type
or
electronic
type
or
electronic
˚F = Fahrenheit
12 15 18 21 24 28 31 34 37
8
12 15 18 21 25 28 31 35
8
11 15 19 22 26 30 33
5
9
13 16 20 24 27 31
6
10 14 18 22 25 29
8
12 15 20 23 27
5
9
13 17 22 26
6
11 15 20 25
8
14 18 23
Specifications subject to change without notice.
R−410A Split System Air Conditioner
5. Measure indoor air (entering indoor coil) wet−bulb
temperature with a sling psychrometer.
6. Refer to 11. Find outdoor temperature and
evaporator entering air wet−bulb temperature. At
this intersection, note superheat. Where a dash
(−−) appears on the table, do not attempt to
charge system under these conditions or
refrigerant slugging may occur. Charge must be
weighted in, adding or removing 0.6 oz/ft of 3/8
liquid line above or below 15 feet (4.6m)
respectively.
7. Refer to 12. Find superheat temperature (from #6
above) and suction pressure. At this intersection,
note suction line temperature.
8. If unit has a higher suction line temperature than
charted temperature, add refrigerant until charted
temperature is reached.
9. If unit has a lower suction line temperature than
charted temperature, reclaim refrigerant until
charted temperature is reached.
10. When adding refrigerant, charge in liquid form into
suction service port using a flow−restricting
device.
11. If outdoor air temperature or pressure at suction
valve changes, charge to new suction line
temperature indicated on chart.
12. Optimum performance will be achieved when
the operating charge produces 10_F suction
superheat at suction service valve with 95_F
(35_C) outdoor ambient and 80_F (27_C) dry
bulb
(67_F
/
temperature (DOE "A" test conditions) at
rated airflow.
SUPERHEAT CHARGING TABLE
(SUPERHEAT ˚C AT LOWSIDE SERVICE PORT)
Outdoor
EVAPORATOR ENTEREING AIR ˚C AT WB
Temp
˚C
10 11 12 13 14 16 17 18 19 20 21 22 23 24
5
7
8
9
11 13 14 16 18 19 21 22 23 25
13
4
6
7
8
10 12 13 15 17 18 19 21 22 24
16
3
6
7
9
18
4
6
7
21
3
5
24
3
27
29
32
35
38
41
43
46
19_C)
wet
bulb)
indoor
˚C = Celsius
11 12 13 15 17 18 20 21 23
9
11 12 13 15 17 18 20 22
7
8
10 12 13 16 17 19 21
4
7
8
10 12 14 16 17 19
4
6
8
11 12 14 17 18
3
5
7
9
11 13 15 17
3
6
8
10 12 14 16
4
7
8
11 13 15
3
5
7
9
12 14
3
6
8
11 14
4
8
10 13
11