Mitsubishi Electric CITY MULTI CMB-WP1016V-GA1 Installation Manual Download Page 9

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3. Installing the HBC controller

3.1. Checking the accessories with the HBC

controller

The following items are supplied with each HBC controller.

3.2. Installing HBC controllers

Installing hanging bolts

Install locally procured hanging bolts (threaded rod) following the procedure given in
the figure. The hanging bolt size is ø10 (M10 screw).
To hang the unit, use a lifting machine to lift and pass it through the hanging bolts.
The suspension bracket has an oval hole. Use a large diameter washer.

[Fig. 3.2.1] (P.3)



Be sure to install the HBC controller horizontally. Check using a level. If
the controller is installed at an angle, drain water may leak out. If the unit
is slanted, loosen the fixing nuts on the hanging brackets to adjust its
position.
Install the HBC level (less than 1° tilt), so that the drain pan can function
correctly.

Caution:

•

Be sure to install the unit horizontally.
Install the HBC level (less than 1° tilt), so that the drain pan can function
correctly.

4. Connecting refrigerant pipes and drain pipes

4.1. Connecting refrigerant pipes

1. Be sure to use non-oxidative brazing where necessary. If you do not use non-oxi-

dative brazing, it may clog the pipes.
When brazing the outdoor unit connecting port of HBC controller, supply nitrogen
gas into the pipe between the outdoor unit and HBC controller.

2. After completing pipe connection, support the pipes to ensure that load is not

imparted to the HBC controller’s end connections.

Warning:

When installing and moving the unit, do not charge it with refrigerant other
than the refrigerant (R410A) specified on the unit.

- Mixing of a different refrigerant, air, etc. may cause the refrigerant cycle to mal-

function and result in severe damage.

Caution:

•

Use refrigerant piping made of phosphorus deoxidized copper and copper
alloy seamless pipes and tubes. In addition, be sure that the inner and outer
surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/
dirt, swarf, oils, moisture, or any other contaminants.

- R410A is a high-pressure refrigerant and can cause the existing piping to burst.

•

Store the piping to be used during installation indoors and keep both ends
of the piping sealed until just before brazing. (Store elbows and other joints
in a plastic bag.)

- If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and

compressor failure may result.

- Infiltration of a large amount of mineral oil may cause the refrigerant oil to dete-

riorate.

•

Do not vent R410A into the atmosphere.

•

R410A is a Fluorinated Greenhouse gas, covered by the Kyoto Protocol
with a Global Warming Potential (GWP) = 2090.

1. Size of HBC controller’s end connection piping

[Fig. 4.1.2] (P.3)

Note:
•

Be sure to use non-oxidative brazing.

*1. PURY-(E)P-400YLM model or larger requires a connection of two main-HBC

controllers in parallel.

4.2. Refrigerant piping work

After connecting the refrigerant pipes of the outdoor units with the outdoor units’ stop
valves remained fully closed, evacuate vacuum from the outdoor units’ stop valve
service ports.
After completing the above, open the outdoor units’ stop valves. This connects the
refrigerant circuit (between outdoor and HBC controller) completely.
How to handle stop valves is described on each outdoor unit.

Precautions for HBC controller combinations

Refer to [Fig. 4.2.1] for the positioning of twinning pipes.

[Fig. 4.2.1] (P.3)

Model name

CMB-WP108V-GA1

CMB-WP1016V-GA1

Item

Qty

Drain hose

Cable tie

Hose band

Installation manual