Air Circulation Obstacles For Under / Over Machines; Hydraulic Connections; Determination Of The Hydraulic Circuit Pressure Drops; Hydraulic Connection To Finned Coils - Mitsubishi Electric w-MEXT 006 Installations, Bedienungs Und Wartungsanleitungen

w-MEXT
DISPLACEMENT
5000
Sizes in millimetres
2.2.6

AIR CIRCULATION OBSTACLES FOR UNDER / OVER MACHINES

The distance between the machine and the
ceiling allows the removal of the air filters.
The minimum height of the raised floor refers
to an empty, unobstructed floor.
The height of the first obstacle should not
exceed the indicated value.
2.3

HYDRAULIC CONNECTIONS

The hydraulic connection to the water exchangers must be defined during the design stage.
Refer to the dimensional drawing of the machine for the spacing of the connections.
The connections are normally positioned on the right side of the machine when looking at
the front. The in and out directions are highlighted by circular plates
UNDER
OVER
DUAL FLUID
UM_w-MEXT_01_Z_10_20_ML
The height of the first obstacle should not
exceed the indicated value. The air
distribution with plenum must be
unobstructed, to allow correct air distribution.
DISPLACEMENT
OUTLET
INLET
2.3.1

DETERMINATION OF THE HYDRAULIC CIRCUIT PRESSURE DROPS

The calculation of the pressure drops of the hydraulic circuit must be defined during the
design of the system. For more information refer to the Technical Manual of the unit.
2.3.2

HYDRAULIC CONNECTION TO FINNED COILS

This diagram is valid for the hydraulic circuit of the following chilled water exchangers
(finned coils):

main coil of chilled water machines

additional coil of Dual Fluid systems

Hot water heating coil
The water inlet and outlet pipes can be identified by the labels applied directly on the
machine.
During the design phase, envisage the installation of the following components on the inlet
water line.

RUa - Shut-off valves: for shutting off the supply of water to the machine
during maintenance.
 AV - Anti-vibration: to isolate the vibrations that can be transmitted from the
system.

M - Pressure gauge (with stopcock): indicates the water pressure in the inlet
line.
 T - Thermometer: indicates the water temperature in the inlet line.

SA - Air vent: to eliminate air in the inlet line.
 SC - Drain valve: to drain water out of the system. To be used also for
connecting an external pump for chemical washing.
 MF - Mains filter: (with RU tap system for filter cleaning): to trap impurities
inside the system (with particle filtration degree not less than 140 mesh = 105
microns).
Assemble the following components on the water outlet line.

RUa - Shut-off valves: for shutting off the supply of water to the machine
during maintenance.

AV - Anti-vibration: to isolate the vibrations that can be transmitted from the
system.

M - Pressure gauge (with stopcock): indicates the water pressure in the inlet
line.

T - Thermometer: indicates the water temperature in the outlet line.

SA - Air vent: to eliminate air in the outlet line.

SC - Drain valve: to drain water out of the system. To be used also for
connecting an external pump for chemical washing.
Install an expansion vessel with a safety valve in the hydraulic circuit. The hydraulic circuit
must be sized according to the applicable laws in force.
RU
MF
RU
2.3.3

POSITION OF THE WATER HEATING COIL

Not available with the DF version
2
1 Main cooling exchanger
2 Hot water heating exchanger
23
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
English
T M
SA
AV RUa
OUT
SC T M
SA
RU AV RUa
SC
Chilled water
1
1
IN
2