60
_
Heat pump 60Hz/R410A
4. Installation of outdoor unit
Installation of
Outdoor Units
SINGLE ZONE
1. Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
2. If the above equation can not be satisfied, then follow the following steps.
①
Selection of air conditioning system: select one of the followings.
• Effective opening part Installation
• Reconfirmation of outdoor unit capacity and piping length
• Reduction of the amount or refrigerant
• 2 or more security device installation of alarm for gas leakage
②
Change indoor unit type
: installation position should be over 2m(6.6ft) from the floor (Cassette type)
③
Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
④
Limitation in piping work
: design for earthquake-proof and prevention against thermal stress
CAUTION
Total amount of refrigerant in the system
≤
0.3kg/m
3
(0.019 lb/ft
3
)
Volume of the room at which indoor unit of the least capacity is installed
4.8 Outdoor unit installation requirments
4.8.1 Piping elevation and length
Gas
Liquid
Standard
Standard
Max.
Max.
Capacity
Pipe Size
Unit : mm(inch)
Length A
Unit : [m(ft)]
Elevation
Unit : [m(ft)]
*Additional
refrigerant
Unit: g/m(oz/ft)
24,000 Btu/h
42,000 Btu/h
15.88 (5/8)
15.88 (5/8)
9.52 (3/8)
9.52 (3/8)
7.6(25.0)
7.6(25.0)
50(164.0)
75(246.1)
30(98.4)
30(98.4)
5(16)
5(16)
40(0.43)
40(0.43)
