Installation Manual

Eng-5
4. Installation method (continued)
4.2 Duct works
4.2.1 Connecting the ducts
(1) Fasten the duct securely to the duct connecting ange, and
wrap aluminium tape (eld 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
Duct
Taping
Aluminium tape
Duct connecting ange
Outdoor duct
Heat-insulating material
Lossnay
unit
Room Side
Outdoor Side
Models LGH-F940 and F1200RVX2-E
Taping Duct
Heat-insulating material
Duct connecting ange
Aluminium tape
Duct connecting ange
Outdoor duct
Heat-insulating material
Lossnay
unit
Room Side
Outdoor Side
CAUTION
• When the supply air is set twice as much as the exhaust air or
more by airow 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.
Anchor bolt Ceiling suspension
xture
Washer Nut
Models LGH-F300 to F600RVX2-E
Models LGH-F940 and F1200RVX2-E
Ceiling suspension xture
Anchor bolt
(3/8-16 or 7/16-14 UNC
(M10 or M12))
Washer
Washer
Nut
Nut
4.1.4 Mounting Lossnay unit
(1) Hang the ceiling suspension xtures on the anchor bolts and
adjust in such a way that Lossnay unit is level.
(2) Tighten up securely using double nuts.
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)
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 gure below .
[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))
Anchor bolt (3/8-16 or 7/16-14 UNC
(M10 or M12))
Nut
Nut
Washer
Washer
Nut
Nut
Vibration isolation rubber
CAUTION
USE TWO NUTS
CAUTION
USE TWO NUTS