6
PIPING CONNECTIONS BETWEEN OUTDOOR AND
INDOOR UNITS
Indoor units are connected to the outdoor units using branch
piping. See Fig. 8 and 9. Table 3 lists main pipe sizes. Branch
pipe sizing depends on the size of the indoor unit selected, see
Table 4. Table 5 lists the maximum number of indoor units and
connected capacity range per 38VMA outdoor unit.
REFRIGERANT PIPING MEASUREMENTS
Table 3 — Main Pipe Sizing
Table 4 — Branch Pipe Sizing
Table 5 — Maximum Indoor Unit Connections
* Use pipe adapter (Components Shipped with Unit - Page 2)
when main pipe diameter for suction line is 5/8 inch.
CAUTION
During brazing, keep nitrogen in pipes to avoid oxidation
inside the pipes. Use soapy water or refrigerant leak
detector to verify every joint in the refrigeration piping.
Fig. 8 — Piping and Control Wiring Connections
Fig. 9 — Piping and Control Wiring Locations
38VMH UNIT
CAPACITY
(tons)
MAIN PIPE SIZE
SUCTION SIDE
(in.)
LIQUID SIDE
(in.)
036 3
5
/
8
3
/
8
048 4
060 5
3
/
4
*
INDOOR UNIT SIZE
(Btuh)
SUCTION SIDE
(in.)
LIQUID SIDE
(in.)
7,000 to 15,000
1
/
2
1
/
4
18,000 to 48,000
5
/
8
3
/
8
38VMH UNIT
MAXIMUM NUMBER
OF INDOOR UNITS
CONNECTED
CAPACITY (%)
036 5
50 to 130048 7
060 9
To Next Page
Loading...
