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6.3 Installation foundation
6.3.1 Base structure
Outdoor unit base structure design should take account of
the following considerations:
1) A solid base prevents excess vibration and noise. Outdoor
unit bases should be constructed on solid ground or on
structures of sufficient strength to support the units’ weight.
2) Bases should be at least 200mm high to provide sufficient
access for installation of piping. Snow protection should also
be considered for the base height.
3) Either steel or concrete bases may be suitable.
4) A typical concrete base design is shown in Fig. 6-5. A
typical concrete specification is 1 part cement, 2 parts sand
and 4 parts crushed stone with steel reinforcing bar. The
edges of the base should be chamfered.
5) To ensure that all contact points are equally secure, bases
should be completely level. Base design should ensure that
the points on the units’ bases designed for weight-bearing
support are fully supported.
ŐPP
Concrete base
h
Ő
200mm
Rubber anti-vibration pads
Solid ground / surface
Ő
200mm
Outdoor unit
Fig. 6-5 Front view of base structure
6.3.2 Location drawing of installation
foundation of the unit: (unit: mm)
1) If the unit is located so high that it is inconvenient for
maintenance personnel to conduct maintenance, the suitable
scaffold can be provided around the unit.
2) The scaffold must be able to bear the weight of
maintenance personnel and maintenance facilities.
3) The bottom frame of the unit is not allowed to be
embedded into the concrete of installation foundation.
4) A drainage ditch should be provided to allow drainage of
condensate that may form on the heat exchangers when
the units are running in heating mode. The drainage should
ensure that condensate is directed away from roadways and
footpaths, especially in locations where the climate is such
that condensate may freeze.
(unit: mm)
Drainage channel
Anchor bolt
Inlet and outlet
pipe side
Electric control
box side
Fig. 6-6 Top view of schematic diagram of installation
dimension of KEM-30 DRS4
(unit: mm)
Drainage channel
Anchor bolt
Electric control
Inlet and outlet
box side
pipe side
Fig. 6-7 Top view of schematic diagram of installation
dimension of KEM-60 DRS4
6.4 Installation of damping devices
6.4.1 Damping devices must be provided
between the unit and its foundation.
By means of the Φ15mm diameter installation holes on the
steel frame of the unit base, the unit can be fastened on
the foundation through the spring damper. See Fig.6-6, 6-7
(Schematic diagram of installation dimension of the unit) for
details about center distance of the installation holes. The
damper does not go with the unit, and the user can select
the damper according to the relevant requirements. When
the unit is installed on the high roof or the area sensitive
to vibration, please consult the relevant persons before
selecting the damper.
6.4.2 Installation steps of the damper
Step 1. Make sure that the flatness of the concrete foundation
is within ±3mm, and then place the unit on the cushion block.
Step 2. Raise the unit to the height suitable for installation of
the damping device.
Step 3. Remove the clamp nuts of the damper. Place the unit
on the damper, and align the fixing bolt holes of the damper
with the fixing holes on the unit base.
Step 4. Return the clamp nuts of the damper to the fixing
holes on the unit base, and tighten them into the damper.
Step 5. Adjust the operational height of the damper base, and
screw down the leveling bolts. Tighten the bolts by one circle
to ensure equal height adjustment variance of the damper.
Step 6. The lock bolts can be tightened after the correct
operational height is reached.
