![background image](http://html1.mh-extra.com/html/carrier/538feq009rbga/538feq009rbga_service-manual_2561763013.webp)
13
REFRIGERANT LINES
General refrigerant line sizing:
1 The 619FB/538FR units are shipped with a full charge of
R410A refrigerant. All charges, line sizing, and capacities are
based on runs of 25 ft (7.6 m). For runs over 25 ft (7.6 m),
consult the long--line section on this page for proper charge
adjustments.
2 Minimum refrigerant line length between the indoor and
outdoor units is 10 ft. (3 m).
3 Refrigerant lines should not be buried in the ground. If it is
necessary to bury the lines, not more than 36--in (914 mm)
should be buried. Provide a minimum 6--in (152 mm) vertical
rise to the service valves to prevent refrigerant migration.
4 Both lines must be insulated. Use a minimum of 1/2--in.
(12.7 mm) thick insulation. A closed--cell insulation is
recommended in all long--line applications.
5 Special consideration should be given to isolating
interconnecting tubing from the building structure. Isolate the
tubing so that vibration or noise is not transmitted into the
structure.
IMPORTANT:
Both refrigerant lines must be insulated separately.
S
The following maximum lengths are allowed:
System Size
9K
(208--230V)
12K
(208--230V)
18k
(208--230V)
Piping
Min. Piping Length
ft (m)
10 (3)
10 (3)
10 (3)
Standard Piping
Length
ft (m)
25 (7.6)
25 (7.6)
25 (7.6)
Max. outdoor--indoor
height difference
ft (m)
32.8 (9.9)
32.8 (9.9)
32.8 (9.9)
Max. Piping Length
with no additional
refrigerant charge
ft (m)
25 (7.6)
25 (7.6)
25 (7.6)
Max. Piping Length
ft (m)
82 (25)
82 (25)
82 (25)
Additional refrigerant
charge (between
Standard – Max
piping length)
Oz/ft
(g/m)
0.2 (18.6)
0.2 (18.6)
0.2 (18.6)
Gas Pipe (size --
connection type)
in
1/2
Flare
connection
1/2
Flare
connection
5/8
Flare
connection
Liquid Pipe (size --
connection type)
in
1/4
Flare
connection
1/4
Flare
connection
1/4
Flare
connection
Refrigerant
Refrigerant Type
R410A
R410A
R410A
Charge Amount
Lbs
(kg)
3.1 (1.4)
3.1 (1.4)
4.4 (2)
ADDITIONAL REFRIGERANT CHARGE TABLE
Unit Size
Total Line Length ft.
Additional Charge oz/ft. ft (m)
Min
Max
10--25 (3--8)
>25--82 (8--25)
9
10
82
None
0.02
12
18
Long Line Applications Units:
1 No change in line sizing is required.
2 Add refrigerant per Additional Charge table.
SYSTEM EVACUATION AND
CHARGING
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Never use the system compressor as a vacuum pump.
CAUTION
!
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the procedure outlined
below is followed. Always break a vacuum with dry nitrogen.
System Vacuum and Charge
Using Vacuum Pump
1 Completely tighten flare nuts A, B, C, D, connect manifold
gage charge hose to a charge port of the low side service
valve (see Fig. 14).
2 Connect charge hose to vacuum pump.
3 Fully open the low side of manifold gage (see Fig. 15).
4 Start vacuum pump.
5 Evacuate using either deep vacuum or triple evacuation
method.
6 After evacuation is complete, fully close the low side of
manifold gage and stop operation of vacuum pump.
7 The factory charge contained in the outdoor unit is good for up
to 25 ft. (8 m) of line length. For refrigerant lines longer than
25 ft (8 m), add refrigerant as specified in the ADDITIONAL
REFRIGERANT CHARGE TABLE on this page.
8 Disconnect charge hose from charge connection of the low
side service valve.
9 Fully open service valves B and A.
10 Securely tighten caps of service valves.
Outdoor Unit
Indoor Unit
Refrigerant
Service Valve
Low Side
High Side
A
B
C
D
Fig. 14 – Service Valve
Manifold Gage
500 microns
Low side valve
High side valve
Charge hose
Charge hose
Vacuum pump
Low side valve
Fig. 15 – Manifold
Summary of Contents for 538FEQ009RBGA
Page 6: ...6 DIMENSIONS OUTDOOR Fig 3 Dimensions Fig 4 Dimensions Fig 5 Dimensions Fig 6 Dimensions...
Page 10: ...10 Outdoor Unit Fig 11 Sizes 09 12...
Page 47: ...47 Shut off power hold both ends of horizontal...
Page 48: ...48...
Page 49: ...49...
Page 50: ...50 ziptie side cutters...
Page 51: ...51...
Page 52: ...52...
Page 53: ...53...
Page 54: ...54...
Page 67: ...67 6 7 8...
Page 68: ...68 9 Remove electric box 10 Remove evaporator...
Page 69: ...69...
Page 70: ...70 11 Remove swing blade...
Page 71: ...71 12 Remove cross flow blade and motor...
Page 72: ...72 13 Remove drive box...
Page 84: ...84 APPENDIX Appendix 1 Reference Sheet of Celsius and Fahrenheit...
Page 89: ...89 UNIT BREAKDOWNS a b c d e...
Page 90: ...90 f g h...
Page 91: ...91...
Page 92: ...92...
Page 93: ...93...