Mitsubishi Electric LGH-F300RVX2-E Notice D'installation page 5

4. Installation method (continued)
4.1.3 Preparing the anchor bolts
Mount the washers (outer diameter of >13/16 inch for 3/8-16 UNC
(21 mm for M10) >15/16 inch for 7/16-14 UNC (24 mm for M12)
and nuts onto the pre-recessed anchor bolts (3/8-16 or 7/16-14
UNC (M10 or M12)), as shown in the figure below .
Anchor bolt (3/8-16 or 7/16-14 UNC
(M10 or M12))
Nut
Washer
Nut
[When using (customer-prepared) vibration isolation rubber]
When using (customer-prepared) vibration isolation rubber, there
is a possibility of this causing a decrease in strength, so we
recommend the following type of construction.
Anchor bolt (3/8-16 or 7/16-14 UNC
(M10 or M12))
Nut
Washer
Vibration isolation rubber
Nut
4.1.4 Mounting Lossnay unit
(1) Hang the ceiling suspension fixtures on the anchor bolts and
adjust in such a way that Lossnay unit is level.
(2) Tighten up securely using double nuts.
Models LGH-F300 to F600RVX2-E
Anchor bolt
Washer Nut
Models LGH-F940 and F1200RVX2-E
Nut
Washer
Ceiling suspension fixture
Washer
Nut
CAUTION
• When suspending Lossnay unit from the ceiling, do not handle
it in such a way that force will be applied to the control box.
• Install the anchor bolts to ensure the product's weight or
earthquake load. (Correctly rated wire/chain may also be used)
CAUTION
USE TWO NUTS
CAUTION
USE TWO NUTS
Ceiling suspension
fixture
Anchor bolt
(3/8-16 or 7/16-14 UNC
(M10 or M12))
4.2 Duct works
4.2.1 Connecting the ducts
(1) Fasten the duct securely to the duct connecting flange, and
wrap aluminium tape (field supply) around the joints so that
there is no air leakage.
(2) Suspend the ducts from the ceiling so that their weight will not
be applied to the Lossnay unit.
(3) The two outdoor ducts must be covered with heat-insulating
material in order to prevent condensation from forming.
Models LGH-F300 to F600RVX2-E
Outdoor Side
Models LGH-F940 and F1200RVX2-E
Heat-insulating material
Duct connecting flange
Outdoor Side
CAUTION
• When the supply air is set twice as much as the exhaust air or
more by airflow function, the Lossnay body indoor side must
be put additional insulation. Without additional insulation, it
could cause condensation and water drop from the unit.
• When on-site commissioning is planned, a straight duct
length more than 10xD (D=duct diameter) from the source of
turbulence like bends, contractions and dampers etc, to the
measurement point is recommended for correct measurement.
In the United Kingdam, on-site measurment should
therefore be measured in accordance with BSRIA guideline
(Commissioning Air System. Application procedures for
buildings AG3/89.3(2001))
• Before attaching the ducts, check that no (debris or any other)
foreign matter (scraps of paper, vinyl, etc.) has found its way
inside the ducts.
• Do not touch the damper plate inside Lossnay unit when
connecting the ducts.
• If it is expected that the ambient temperature around the place
where the Lossnay unit is installed will be high during the
summer air conditioning season, it is recommended that the
indoor duct work be covered with insulation material.
Eng-5
Room Side
Duct
Heat-insulating material
Taping
Outdoor duct
Duct connecting flange
Taping Duct
Heat-insulating material
Outdoor duct
Duct connecting flange
Aluminium tape
Lossnay
unit
Room Side
Aluminium tape
Lossnay
unit