Carrier 40MBQB12C--3 Hoja de especificaciones Pagina 19

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PIPING REQUIREMENTS
System size 18K 27K 36K 48K
Piping
Min. Piping Length ft (m) 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)
Max. outdoor-indoor height difference
ft (m) 32(10) 32(10) 32(10) 32(10)
(OU higher than IU)
Max. outdoor-indoor height difference
ft (m) 49(15) 49(15) 49(15) 49(15)
(IU higher than OU)
Max. Piping Length with no additional refrigerant
charge
ft (m) 24.6(7.5) 24.6(7.5) 24.6(7.5) 24.6(7.5)
Max. Length for one indoor unit ft (m) 65.6(20) 82(25) 98(30) 98(30)
Max. height different between indoor units ft (m) 32(10) 32(10) 32(10) 32(10)
Total Maximum Piping Length Ft. (m) 98(2*15=30) 147(3*15=45) 196(4*15=60) 245(5*15=75)
Additional refrigerant charge
Oz/ft (g/m) 0.16(15) 0.16(15) 0.16(15) 0.16(15)
(between Standard Max piping length)
Gas Pipe in 3/8*2 3/8*3 1/2+3/8*3 1/2+3/8*3
Liquid Pipe in 1/4*2 1/4*3 1/4*4 1/4*5
Refrigerant
Refrigerant Type R410A R410A R410A R410A
Heat Pump Models Charge Amount Lbs (kg) 4.19 (1.9) 6.17 (2.8) 7.94 (3.6) 10.14 (4.6)
APPLICATION DATA
UNIT SELECTION
When selecting a variable speed system match the system capacity
range to the anticipated load range. Since a variable speed system
can accommodate a wide range of loads it is important to
understand the percentage of time that the system will be required
to run at the both the maximum and the minimum load points. This
differential is most evident when a residential application is
compared with a commercial application.
Generally there will be more load diversification in the residential
application (shifting from low load to high load).
The commercial application will tend to be more steady during the
normal day time hours, and will go to low load levels after normal
business hours. If it is anticipated that the system will be required
to run at the maximum load point for the majority of the time, the
next larger system capacity should be selected.
The Application Table on page 20 is a guideline for selecting the
proper size for the application.
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