Sanyo ECO G SGP-EGW190M2G2W, Technical Data Manual

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System Design
2. Refrigerant piping design
D-5
4) Selecting ball valves
Valve connection pipe diameter (mm)*
1
Model Type No. Gas tube Liquid tube Balance tube
Applicable outdoor
unit
Applicable indoor unit
Total indoor unit capacity
through valve
SGP-BV710K
φ
31.75
φ
19.05 - Type 710 (over 90 m) Over 72.8kW-101.0kW
SGP-BV450K
φ
28.58
φ
19.05 - - Over 35.5kW-72.8kW
SGP-BV355K
φ
28.58
φ
15.88 - Type710 or 560 Over 45.0kW-72.8kW
SGP-BV450M
φ
28.58
φ
12.7 - Type 450 Over 35.5kW-45.0kW
BV-RXP335AGB
φ
25.4
φ
12.7 - Type 355 Over 28.0kW-35.5kW
BV-RXP280AGB
φ
22.22
φ
9.52 - - Over 22.4kW-28.0kW
BV-RXP224AGB
φ
19.05
φ
9.52 - - Over 16.0kW-22.4kW
BV-RXP160AGB
φ
15.88
φ
9.52 - - Over 5.6kW-16.0kW
BU-RXP56AGB
φ
12.7 *2
φ
6.35 - - 5.6kW or less
BV-RP3GB - -
φ
9.52 For balance tube
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
Gas tube Liquid tube Header tube (LM) diameter
(mm)*
1
φ
31.75
φ
19.05
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.
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.
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).