Care And Maintenance - Carrier 38EYX Installation And Start-Up Instructions Manual

OUTDOOR
TEMP
10 11
(°C)
13 5.0 6.7
16 3.9 5.6
18 – 3.3
21 – –
24 – –
27 – –
29 – –
32 – –
35 – –
38 – –
41 – –
43 – –
46 – –
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 °C is at low-side service port.
SUPERHEAT
TEMP
743
(°C)
0 1.7
1 2.8
2 3.9
3 5.0
4 6.1
6 7.2
7 8.3
8 9.4
9 10.6
10 11.7
11 12.8
12 13.9
13 15.0
14 16.1
15 16.7
16 17.2
17 18.3
18 19.4
19 20.6
20 21.7
21 22.8
22 23.9
NOTE: In heating mode, check refrigerant charge only when
pressures are stable. If in doubt, remove charge and weigh in
correct refrigerant charge.
NOTE: When charging is necessary during heating season,
charge must be weighed in accordance with unit rating plate and
adjusted for interconnecting tubes greater than or less than 7.6 m.
Step 15—Final Checks
IMPORTANT: Before leaving job, be sure to do the following:
1. Securely fasten all panels and covers.
2. Tighten service valve stem caps to 1/12-turn past finger tight.
Table 4—Superheat Charging Table (SI)
EVAPORATOR ENTERING AIR TEMPERATURE (°C WB)
12 13 14 15
7.8 9.4 11.1 11.9
6.7 8.3 10.0 10.8
5.6 7.2 8.9 9.7
3.9 5.6 7.2 8.1
– 3.3 5.0 5.8
– – 2.8 3.6
– – – –
– – – –
– – – –
– – – –
– – – –
– – – –
– – – –
Table 5—Required Suction-Line Temperature (°C)
SUCTION PRESSURE AT SERVICE PORT (KPA)
774 805
2.8 3.9
3.9 5.0
5.0 6.1
6.1 7.2
7.2 8.3
8.3 9.4
9.4 10.6
10.6 11.7
11.7 12.8
12.8 13.9
13.9 15.0
15.0 16.1
16.1 17.2
17.2 18.3
17.8 18.9
18.3 19.4
19.4 20.6
20.6 21.7
21.7 22.8
22.8 23.9
23.9 25.0
25.0 26.1
16 17 18 19
12.8 14.4 16.1 17.8
11.7 13.3 15.0 16.7
10.6 11.7 13.3 15.0
8.9 10.6 11.7 13.3
6.7 8.3 10.0 11.7
4.4 6.7 8.3 10.0
– 4.4 6.1 8.3
– 2.8 5.0 7.2
– – 3.3 5.6
– – – 4.4
– – – 2.8
– – – –
– – – –
836 869 902
5.0 6.1 7.2
6.1 7.2 8.3
7.2 8.3 9.4
8.3 9.4 10.6
9.4 10.6 11.7
10.6 11.7 12.8
11.7 12.8 13.9
12.8 13.9 15.0
13.9 15.0 16.1
15.0 16.1 17.2
16.1 17.2 18.3
17.2 18.3 19.4
18.3 19.4 20.6
19.4 20.6 21.7
20.0 21.1 22.2
20.6 21.7 22.8
21.7 22.8 23.9
22.8 23.9 25.0
23.9 25.0 26.1
25.0 26.1 27.2
26.1 27.2 28.3
27.2 28.3 29.4
3. Leave User's Manual with owner. Explain system operation
and periodic maintenance requirements outlined in manual.
4. Fill out Dealer Installation Checklist and place in customer
file.

CARE AND MAINTENANCE

For continuing high performance and to minimize possible equip-
ment failure, periodic maintenance must be performed on this
equipment.
Frequency of maintenance may vary depending upon geographic
areas, such as coastal applications.
9
20 21 22 23
19.4 20.6 22.2 23.3
18.3 20.0 21.1 22.2
16.7 18.3 20.0 21.1
15.0 16.7 18.3 20.0
7.8 15.6 17.2 18.9
11.7 13.9 15.6 17.2
10.6 12.2 14.4 16.7
8.9 11.1 13.3 15.0
7.8 10.0 12.2 13.9
6.7 8.3 11.1 12.8
5.0 7.2 9.4 12.2
3.3 6.1 8.3 11.1
– 4.4 7.8 10.0
957 971
8.3 9.4
9.4 10.6
10.6 11.7
11.7 12.8
12.8 13.9
13.9 15.0
15.0 16.1
16.1 17.2
17.2 18.3
18.3 19.4
19.4 20.6
20.6 21.7
21.7 22.8
22.8 23.9
23.3 24.4
23.9 25.0
25.0 26.1
26.1 27.2
27.2 28.3
28.3 29.4
29.4 30.6
30.6 31.7
24
25.0
23.9
22.8
21.7
20.6
19.4
18.3
17.2
16.1
15.0
14.4
13.9
12.8
1005
10.6
11.7
12.8
13.9
15.0
16.1
17.2
18.3
19.4
20.6
21.7
22.8
23.9
25.0
25.6
26.1
27.2
28.3
29.4
30.6
31.7
32.8