Mitsubishi Electric ECOV-X37VA Manuel D'installation page 28

7-4. Installation of heat recovery port
• To perform heat recovery, route the hot gas pipe from the
hot gas outlet on the back of the unit or in the middle of
the discharge pipe. Remove the hot gas pipe at the
brazed part. Cut the <outlet> at the straight pipe section,
and route the <inlet> using an elbow.
(See the figure on the right.)
• Use the pipe sizes in the following table after external unit
routing.
Model
ECOV-X37, X55VA
• Large piping vibration may be caused by pressure pulsation depending on the operating conditions of the unit, the shape and
length of the pipes, and the method to support the pipes.
If large vibration occurs during a test run, change the support intervals and the method for fixing the pipes to prevent vibration.
When attaching support fittings on the building or ceiling, take appropriate anti-vibration measures to prevent the piping vi-
bration from being transmitted to the building.
• Provide insulation or protective cover to the parts of the pipes that can come into contact with a human body.
• When brazing the pipes, cool down the pipes with a wet cloth if packings are used in the pipe fixing parts.
The unit is filled with nitrogen gas. Remove the nitrogen gas before brazing the pipes.
• To avoid the thermal impact from the hot gas pipe, allow at least 10 cm between the hot gas pipe and the liquid pipe.
• When brazing the suction pipe or liquid pipe, use a slate board to protect the control devices and wires from the torch flame.
Minimize the welding flame so as to prevent the flame from touching the check joint.
• There is no set-up for hot gas defrosting.
Due to the use of independent local hot gas (e.g. floor heating), only hot gas pipe routing is available.
WT09614X03_GB
Remove the hot gas pipe at the brazed sections, and then take
the hot gas out using the locally procured elbow as shown in the
figure below.
Debraze the
sections here.
Pipe size [mm (in.)]
Unit port Pipe locally
procured
ø15.88 ø15.88
(5/8) (5/8)
1
2
28
ø15.88 [ø5/8"]
ø15.88 [ø5/8"] x 80
(Locally procured)
ø15.88 [ø5/8"]
Hot gas outlet
<ø15.88 [ø5/8"] Brazed>
Hot gas inlet
<ø15.88 [ø5/8"] Brazed>
544
ø15.88 [ø5/8"]
1
Elbow (locally procured)
On-site pipes
2
(Unit: mm)