-I Atom B Series VRF 50/60Hz
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Part 3 - System Design and Installation
2.1.3 Base structures
Outdoor unit base structure design should take account of the following considerations:
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.
Bases should be at least 200mm high to provide sufficient access for installation of piping.
Either steel or concrete bases may be suitable.
A typical concrete base design is shown in Figure 3-2.4. A typical concrete specification is 1 part cement, 2 parts sand
and 6 parts crushed stone with Φ10mm steel reinforcing bar. The edges of the base should be chamfered.
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.
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.
Figure 3-2.4: Outdoor unit typical concrete base structure design (unit: mm)
2.1.4 Centralized drainage
While installing the outdoor unit, pay attention to the installation place and the drainage pattern; if it’s installed at the
alpine zone, the frozen condensed water will block up the water outlet, please pull out the rubber stopper of the reserve
water outlet. If that still fails to satisfy for the water draining, please knock open the other two water outlets, and keep
the water can drain in time.
Pay attention to the knock the reserve water outlet from outside to inside, and it will be beyond repair after knocking
open, please pay attention to the installation place, lest cause the inconvenience. Please do the moth proofing for the
knocked out hole, to avoid the pest processing into and destroy the components.
Figure 3-2.8: Centralized drainage
≥150mm
Outdoor unit
Φ10 Expansion bolt
≥ 200mm
Concrete base h≥200mm
Rubber anti-vibration pads
Solid ground or roof
Reserve water outlet
Reserve water outlet
Water Outlet
Outlet for power and connecting pipes
(Need to knock open)
(With rubber stopper)
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