Indoor Unit Installation – Piping Design And Layout - Gree MULTI18HP230V1CO Installation Manual

TWD-1518 multi21+ install_printer.qxp_Layout 1 3/22/17 9:41 AM Page 29
POWER AND WIRING INSTALLATION
Outdoor Unit
Electrical Diagrams
30K Unit
To unit A
L1 L2
P
P
P
Connecting
Power cord
cable
L1 L2
L1 L2
L2
L1
L2
L1
36K and 42K Unit
To unit A
L1 L2
Connecting
Power cord
cable
L1 L2
L1 L2
L2
L1
L2
L1
T
T
T T
To unit B
To unit C To unit D
cable cable
cable cable
cable
cable cable
Connecting
Connecting Connecting
cable
cable cable
To the power supply
C D
C D
C C
C C
T
To unit B
To unit C To unit D To unit E
T
T
Connecting cable cable
Connecting Connecting
cable
cable cable
cable To the power supply cable
cable cable
C D
C D E
C C
C C
INDOOR UNIT INSTALLATION
Piping Design and Layout
The piping design and layout are critical factors for the overall performance and reliability of the
system. Find the desired locations for each indoor unit and the outdoor unit. Then measure and
record the piping lengths and heights as directed below to qualify the piping design and layout.
First, measure and record the piping length (L1,L2, L3....Ln) from the outdoor unit to each indoor unit.
NOTE: Min. refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).
L1=
L2=
L3=
L4=
T
L5=
T
T
Second, find the indoor units with the greatest vertical distance from the outdoor unit. Measure the maximum
vertical height (H1) from the bottom of the outdoor unit to the bottom of the highest mounted indoor units.
cable
Connecting
cable
H1=
cable
cable
Third, find the two indoor units with the greatest vertical distance from each other. Measure the maximum
E
vertical height (H2) between those two indoor units from bottom of one unit to bottom of the other unit.
H2=
C
C
28
Ln
2
L2
L1
1
13