Sanyo SGP-EGW190M Technical Data Manual page 26

System Design
4) Selecting ball valves
Valve connection pipe diameter (mm)*
Model Type No.
SGP-BV710K
SGP-BV450K
SGP-BV355K
SGP-BV450M
BV-RXP335AGB
BV-RXP280AGB
BV-RXP224AGB
BV-RXP160AGB
BU-RXP56AGB
BV-RP3GB
Note 1. The ID of these valves is about the same as that of the connecting copper pipe, so no correction
for pressure loss is necessary.
Note 2. Leakage pressure rating must be at least 4.15 MPa.
*1. Select a size that does not exceed header size.
*2. Even for 5.6 kW or less, if the indoor unit piping branches, use 15.88 mm diameter gas pipe.
(3) Selecting system header tubing
Connect outdoor and indoor units together using a pair of header tubes.
1) Tube diameters
Header tube (LM) diameter
(mm)*
Note: The balance tube (tube between outdoor units) is 9.52 mm dia.
*1. If the maximum tubing length (L1) exceeds 90m (equivalent length), increase the size of the main
tubing for both liquid and gas by one size. However, gas tube diameter should not exceed 38.1 mm.
(Reducers are available locally.)
Anticipating additional indoor units
1) Ball valve installation position: Install on main piping after branching.
2) Installation guideline: Slope main pipes after branches so as to prevent oil buildup.
Caution
When installing indoor piping (including that for future indoor expansion) along a main pipe after a
branch, be sure to position service ports to face in the direction of their units (see dashed lines in the
example above).
1
Gas tube Liquid tube Balance tube
φ31.75 φ19.05
φ28.58 φ19.05
φ28.58 φ15.88
φ28.58 φ12.7
φ25.4 φ12.7
φ22.22 φ9.52
φ19.05 φ9.52
φ15.88 φ9.52
φ12.7 *2 φ6.35
- -
1
Locate ball valves as close as possible to (within 40 cm) of their branch points.
If the pipe diameter at the ball valve is smaller than that of the main pipe after
branching, install reducers only at the ball valve connections.
Locate the equipment where it will be easy to operate and inspect in the future.
2. Refrigerant piping design
Applicable outdoor
unit
- Type 710 (over 90 m)
- -
- Type710 or 560
- Type 450
- Type 355
- -
- -
- -
- -
φ9.52
For balance tube
Gas tube
φ31.75
D-5
Applicable indoor unit
Total indoor unit capacity
through valve
Over 72.8kW-101.0kW
Over 35.5kW-72.8kW
Over 45.0kW-72.8kW
Over 35.5kW-45.0kW
Over 28.0kW-35.5kW
Over 22.4kW-28.0kW
Over 16.0kW-22.4kW
Over 5.6kW-16.0kW
5.6kW or less
Liquid tube
φ19.05