Carrier 40MAQ Series - System Evacuation and Charging; System Vacuum and Charge; Long Line Applications

22
IMPORTANT: Both refrigerant lines must be insulated separately.
S The following maximum lengths are allowed:
REFIGERANT LINE LENGHTS ft. (m)
System size
9K
(115V)
12K
(115V)
9K
(208-230 V)
12K
(208-230 V)
18K
(208-230 V)
24K
(208-230 V)
30K
(208-230 V)
Piping
Min. Piping Length ft (m) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3)
Standard Piping Length ft (m) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5)
Max. outdoor-indoor
height difference
ft (m) 32(10) 32(10) 32(10) 32(10) 65(20) 65(20) 82(25)
Max. Piping Length with
no additional refrigerant
charge
ft (m) 26(8) 26 (8) 26(8) 26(8) 26(8) 26(8) 26(8)
Max. Piping Length ft (m) 82(25) 82 (25) 82(25) 82(25) 98(30) 98(30) 164(50)
Additional refrigerant
charge (between
Standard – Max piping
length)
Oz/ft
(g/m)
0.16(15) 0.16 (15) 0.16(15) 0.16(15) 0.16(15) 0.32(30) 0.32(30)
Gas Pipe (size -
connection type)
in
(mm)
3/8 (9.52) 1/2 (12.7) 3/8 (9.52) 1/2 (12.7) 1/2 (12.7) 5/8 (16) 5/8 (16)
Liquid Pipe (size -
connection type)
in 1/4 in 1/4 in 1/4 in 1/4 in 1/4 in 3/8 in 3/8 in
(mm) 6.35 6.35 6.35 6.35 6.35 9.52 9.52
Refrigerant
Refrigerant Type R410A R410A R410A R410A R410A R410A R410A
Heat Pump Models
Charge Amount
Lbs
(kg)
2.76(1.25) 2.76 (1.25) 2.76(1.25) 2.76(1.25) 4.19(1.90) 5.18(2.35) 6.62(3.00)
S Above charge is for piping runs up to 25 ft. (7.6 m).
S For piping runs greater than 25 ft. (7.6 m), add
refrigerant up to the allowable length as specified below.
S The outdoor unit (Sizes 09 - 18) has an electronic
expansion valve to manage the refrigerant flow of the
connected fan coil. Sizes 24 and 30 have capillary tube
metering devices in the outdoor unit.
Long Line Applications,:
1 No change in line sizing is required.
2 Add refrigerant per table below.
ADDITIONAL CHARGE TABLE
Unit
Size
Total Line
Length ft
Additional Charge, oz/ft.
ft (m)
Min Max
10 - 25
(3 - 8)
>25 - 82
(8 - 25)
>82 - 164
(25 - 50)
9
10
82
None
0.1612
18
98
24
0.32 0.32
30 164
3 Reduction in capacity due to long lines can be calculated
from the chart below.
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. Always break
a vacuum with dry nitrogen.
SYSTEM VACUUM AND CHARGE
Using Vacuum Pump
1 Completely tighten all flare nuts and connect manifold gage
charge hose to a charge port of the low side service valve.
(See Fig. 16.)
2 Connect charge hose to vacuum pump.
3 Fully open the low side of manifold gage. (See Fig. 17)
4 Start vacuum pump
5 Evacuate using the 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 in this
document.
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.