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3-4 Hoisting of outdoor unit
1) No packing material can be removed during hoisting, hoisting shall be
made by two ropes of 8m above bound on the package, and the machine
must be balanced and hoisted safely and reliably. If there is no package
or the packing material is broken, some backing board or packing material
shall be used for protection.
2) The outdoor material shall be handled and hoisted vertically within
15° and safety is the most important during handling and hoisting.
,
3-5 Foundation for outdoor unit
1) Provide a firm and adequate foundation to:
1. Protect the outdoor machine from sinking;
2. Prevent any abnormal noise cause by the foundation.
2) Foundation type
1. Steel structure
2. Concrete structure (shown as the figure below)
3) Key points in foundation construction:
1.
The master machine shall be installed on a firm cement ground or
concrete foundation. The concrete foundation is constructed as per Fig.
3.3, or be constructed with field measuring.
2.
The foundation must be fully leveled to ensure all points are
uniformly contacted.
3.
The foundation shall be constructed to ensure it directly supports the
vertical edges of the front and back base plates which are the actual
weight bearing positions of the machine.
4.
When the foundation is set on the roof, no crushed stone bed is
required, but the concrete surface must be roughened. The standard
concrete mixture ratio is: cement 1/ sand 2/ gravel 4, and reinforced by
steel bar of Ф10. The cement mortar surface must be leveled and the
foundation edge shall be chamfered.
5.
The foundation shall be set with drainage ditches around to avoid
water accumulation.
6.
Make sure the roof has enough bearing capacity.
7.
For tube connection at the unit bottom, the foundation shall be at
least 200mm below the unit.
Φ
10 Expansion bolt
Rubber cushion
gasket
Solid ground
or roof
3-6 Drawing of positions for installation of anchor bolts
Through-hole(
Fig. 3.7 bolts location
Tab. 3.2 bolts location
Type
Size
8HP~12HP
A
720mm
B
1040mm
C
774mm
D
850mm
Outdoor unit
Concrete
foundation
Fig. 3.6 Foundation
B
A
15× 3 Slotted hole
2
14HP~22HP
24HP~32HP
1070mm
1390mm
774mm
850mm
3-7 Drawing of center for each connecting tube
R
3-8 Key points for installation of outdoor unit
1) Vibration isolators or vibration isolating pads shall be installed
between the unit and foundation as per the design specification.
2) The outdoor unit must be tightly contacted with the foundation to
avoid excessive vibration and noise.
3) An earth line must be connected as per legal rules.
4) Before debugging, the valves on the gas and liquid tubes of the
outdoor unit cannot be opened.
5) The installation position must be with enough space or maintenance.
3-9 Arrangement sequence outdoor units and setting of master and
slave units
When a system is equipped with more than two outdoor units, the
following mode is recommended for setting: outdoor units are arranged
by sizes, and the largest one is set at the 1st manifold; the outdoor unit
with the largest power is set as the master unit, and others are slaves.
For example there is a system of 80HP (a combination of 32HP, 24HP
and 24HP):
1) The unit of 32HP is set at the 1st manifold (see Fig.3.9).
2) The arranging sequence is 32HP, 24HP and then 24HP.
3) The unit of 32HP is set as the master unit, and units 24HP and 24HP
are the slave.
Outdoor unit 32HP
1st manifold
3-10 Installation space of outdoor unit
1) When installation, a maintenance space as shown in Fig.3.10 shall be
left, the power supply device shall be installed at the side of the outdoor
unit as per the method shown in the installation manual for the power
supply unit.
2) Make sure there is necessary space for installation and maintenance,
and modules in a system must be arranged at the same height.
3) When outdoor units are higher than surrounding barriers and they will
be arranged in a row, please see Fig.3.11.
4) When outdoor units are higher than surrounding barriers and they will
be arranged in 2 rows, please see Fig.3.12.
5) When outdoor units are higher than surrounding barriers and they will
)
be arranged in more than 2 rows, please see Fig.3.13.
6) When outdoor units are lower than surrounding barriers, please see
Fig. 3.14; the arrangement is similar with the situation when outdoor units
are higher than surrounding barriers, but to prevent the thermal exchange
effect is influenced by outdoor hot air, a wind scooper shall be equipped
to radiating cover of the outdoor unit, as shown in Fig. 3.14. The height of
wind scooper is H-h, and the scooper shall be made by the user in the
field.
1720mm
7) When there is any barrier above the outdoor unit, please see Fig.
3.15.
2060mm
774mm
850mm
3
R magnified
Fig. 3.8 Connecting tubes
Outdoor unit 24HP
Indoor unit A
Indoor unit B
Fig. 3.9 Sequence of outdoor unit
Gas side
Needle valve
Pressure test
refrigerant refill
Liquid side
Outdoor unit 24HP
Indoor unit C
V.
V.2
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