Indoor Unit Installation; Location And Space Of Installation; Installation Of Mex Box - McQuay MDS 30 Installation Manual

Knock-out-hole
Piping connection position

5.0 Indoor Unit Installation

5.1 Location and space of installation


Ensure adequate air flow for the indoor unit and no obstacle around it.

Ensure enough space for maintenance and servicing.

Wall or ceiling shall be strong enough to support the indoor units.

Do not expose the unit under direct sunlight.

Do not install the indoor unit near to places with oil, steam or flammable gas.

Do not install the indoor unit at places with high frequency.

5.2 Installation of MEX Box


All indoor units need to connect to MEX Box.

It should be installed away from quiets such as bedroom.

Ensure the MEX box is vertical when installed. The distance between
MEX box and indoor unit could not exceed the maximum length limit
of the expansion valve cable. The cable needs to be plugged on the
control board of indoor unit.

MEX Box can be installed in any of the method shown below.
steeve
nut
washer
hole for screw
washer
nut
Installation Manual IM-MDS_(i)
A
To balance pipe
access valve
To units ball valve
Elbow
For φ 28.6mm gas pipe, directly
connect to Tri-joint; For φ 34.9mm
gas pipe, add a reducer and a
transition pipe
SUSPENDING BY STEEVES
washer
hook
Access valve for
balance piping ( φ 9.52)
Master and slave must be
installed in the same level
To units ball valve
φ 28.6mm a transiton pipe
(only for φ 34.9mm gas pipe)
SCREW SETTING ON INDOOR UNIT
SCREW SETTING ON WALL
Ball valve
(liquid side)
Knock-out-hole
Knock-out-hole
(for connecting balance pipe)
Ball valve (gas side)
A >10mm
B >200mm
C >500mm
D>100mm
Tri-jiont
SCREW
SCREW
7