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Design & installation Guide For McQuay MDS Multi System
● Some units need an electronic expansion valve box
(throttle box) for condensate pipe installation, as shown
in the right figure:
Figure 1 Vertical pole mounting
Note: The electronic expansion valve box of the indoor unit
must be placed in the throttle box and installed in an appropri-
ate position of the liquid pipe. In the installation, make sure the
electronic expansion valve is upright and cabled properly in the
indoor unit module, and the throttle box is installed within the
cable range (less than or equal to 10 m) of the electronic
expansion valve as shown in the upper right figure. As the
throttle box may cause noise, take some proper sound insula-
tion measures for the throttle box in the installation, or put the
throttle box within the area where the noise is acceptable
according to the electronic expansion valve cable length or
move it to the area without strict noise requirements.
Refer to and select the follow-
ing installation modes (make
sure it is installed upright firmly
and reliably as shown in the
diagram.
Figure 2 Horizontal rod mounting
to reduce the noise of indoor unit,mds system is using external exv box. for different exv box model,
please refer to the table below :
Indoor unit Exv box model
MWM008/010/015
MCC008/010/015 MEX-14-2SA-A
MCK010/015
MWM020 MEX-18-2SA-A
MWM025
MCC018/020/025
MEX-18-3SA-A
MCK018/020/025
MCM020
MCC030/040/050/060
MCK030/040 MEX-24-3SA-A
MCK030
MCK050
MEX-30-3SA-A
MCM050
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