McQuay MDS030A Manual page 39

Installation of MDB-T Series Indoor Unit
To mount the MDS050~060T in ceiling. With the air outlet flange close to the unit bottom, when the unit is
mounted in ceiling, the piping is simple and decreases the requirement for room height. After the installation,
only the air inlet/outlet is exposed, as shown below.
• To check the accessories are ready
• To choose the location for installation
Make sure it is easy to connect cables and pipes. Select a place where needs shorter air pipe and fewer
connecting pipe work and ensure the building is with enough strength, ascertain the pole location and
adjust it to keep the unit horizontally, and examine safety of the suspending.
• To install the hook
Make sure to fix the hook, and the top suspending part is strong enough to bear the unit weight.
• To install the indoor unit
To fix the pole location, examine if it is in the same level with the unit, and check if the suspending panel
is stable; make sure there is a slope oriented to the drainage direction. Pay attention that the distance
between the return air outlet and the heat exchanger inlet shall not be less than 3m.
• To install the refrigerant piping
- If units expose to air more than 15s, units shall be vacuumed firstly. If the connecting piping is not
prepared for indoor unit, do not open sealed parts (valves, joints, rubber, plastic gasket and copper
cap).
• Duct working design
Well designed duct working can reduce noise level effectively. When doing this, please consider the
internal air pressure drop shall be equal to ESP, otherwise, air flow may be too big or too small, and cause
the unit failure. It can be solved by adjusting the fan speed to make them in balance (such as adjusting
the air speed of the diffuser).
• Installation of drainage piping
a. Slope is required as 1/100.
b. To use suspending bolt to fix the long drainage piping.
c. After installation, to run the leakage test is necessary.
d. Only in cooling mode, there is a need to detect the status of drainage.
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