3. Installation of outdoor unit
59
_
Heat pump 50Hz/R410A
Part 3 Design and installation
2) Installation of BD unit
①
Branch distributor unit
We recommend BD unit installation at indoor side. but, if you install it outdoor side, care should be taken against water and
other factors which may damage the pcb.
③
Installation of BD unit
• This unit may be installed suspended from the ceiling or mounted on the wall.
• This unit may only be installed horizontally , as shown in the diagram below. (Side B is facing up) However, it may be
freely installed in any direction, forward or backward, and to the sides.
• Be sure to secure a 600mm square opening for service and inspection as shown in the diagram below, for both ceiling -
suspended installation and wall-mounted installation.
• BD unit does not require drain treatment as it uses internal insulation.
• Service direction is the side B and C
• The piping for the indoor unit may be led around in direction A
• The inclination of side B must be within ±5 degree forward or backward or to the sides.
Available condition
Temp : Max. 54
Humidity : Max.80%
PCB
②
Connection of piping (flare work)
• No brazing & easy installation
• Be sure to mark all the local refrigerant piping(liquid pipes, gas pipes, etc.) for each indoor unit designating
clearly to which room it belongs to. (A, B, C, D)
NOTE
- Unit for variable refrigerant volume system
3.9.2 Branch distributor(Accessory)
1) General information
Model name:
Functional description:
• Distribution of refrigerant to various indoor uits.
• 3 types available (2, 3, 4 indoor units)
• Consists of EEV's inside
• Controlling PCB inside the unit
• Internally insulated
• Flare joints for easy installation and labour cost saving
• Compact design
BD unit
PMBD3620
PMBD3630
PMBD3640
Product
Multi FDX
