Preparing The Anchor Bolts; Mounting Lossnay Unit; Connecting The Ducts - Mitsubishi Electric LGH-25RVX-E Installation Instructions Manual

Installation method (continued)

3. Preparing the anchor bolts

Mount the washers (outer diameter of >21 mm for M10, >24 mm
for M12) and nuts onto the pre-recessed anchor bolts (M10 or
M12), as shown in the figure below.
Anchor bolt (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 (M10 or M12)
Nut
Washer
Vibration isolation rubber
Nut

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-15 to 100RVX-E
Anchor bolt
Washer Nut
Models LGH-150 and 200RVX-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
(M10 or M12)

5. 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-15 to 100RVX-E
Taping
Outdoor Side
Models LGH-150 and 200RVX-E
Taping
Heat-insulating material
Duct connecting flange
Outdoor Side
CAUTION
• 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.
Do not carry out the following types of duct construction. (Doing so
could cause a drop in the air volume and generate abnormal noises.)
• Extremely • Multiple bends
sharp bends
Room Side
Duct
Aluminium tape
Heat-insulating material
Lossnay
unit
Outdoor duct
Duct connecting flange
Duct
Room Side
Aluminium tape
Heat-insulating material
Lossnay
unit
Outdoor duct
Duct connecting flange
• Bends right next • Extreme reduction in
to the outlet the diameter of the
connected ducts
Eng-5