York YVAG012 Operation & Maintenance Manual page 12

Roof location
If the unit is installed on the roof, the roof must have
sufficient strength to support the weight of the unit and
maintainer. The unit can be placed on the concrete
foundation that is for the similar ground installation or
on a box iron shelf;
Isolators (optional)
It is recommended to place damped spring vibration
isolator (especially for units with rack mounting or
installed on the roof floor) between the base and the
foundation of the outdoor unit. The isolator mounting
shall be selected and installed according to design
requirements to satisfy the demand of vibration
isolation and to avoid phenomena including solid-
borne sound transmission and resonance; generally the
construction shall be undertaken by professionals with
the models provided by the design engineer; the table
below is the recommended model selection of absorber,
a proximal absorber can be selected near the given
optimal load and vertical stiffness:
YVAG012~033:
YVAG040:
TABLE 3 – ABSORBER SELECT
Total No. of Optimal Load of
Unit
isolators
YVAG
4
012~018
YVAG
4
020~033
YVAG040 4
JOHNSON CONTROLS
Cooke Industries - Phone: +64 9 579 2185
Optimal Load of
A/B Side (kg) C/D Side (kg)
20 65
35 80
150/110 110
Email: sales@cookeindustries.co.nz
FORM NO.: 6U5M-A11M-NB-EN
Draining
There should be drainage way around the unit so that
the rainwater and water generated from heating for
defrosting and heating condensation can be discharged;
if there is no drainage way, please add water pond on
the bottom of the unit and lead it with pipeline to a
suitable place.
1. Drainage way (012~018)
There is a 26mm and three 20mm drain holes on the
bottom of the base plate. For units that need centralized
drainage in warmer district, block the three 20mm holes
with the incidental drain plugs of the unit, and install
The drainage joint into the 26mm hole and connect
suitable hosepipe to discharge the condensed water to
the centralized drainage place. For units need
centralized drainage in severe cold area, the drain pan
need to be designed on site; the drain hole on the base
plate could not be blocked, or it would lead to freezing
due to impeded drainage of the base plate.
Φ20mm
Φ26mm
FIGURE 5-BACKPLANE SCHEMATIC（012~018)
2. Drainage way (020~040)
YVAG020~033 without drainage way, please add
water pond on the bottom of the unit and lead it with
pipeline to a suitable place.
Φ28mm
Φ28mm
Φ28mm
Φ28mm
FIGURE 6-BACKPLANE SCHEMATIC（020~033)
Web: www.cookeindustries.co.nz
Φ20mm
Φ20mm
Φ28mm
Φ28mm
Φ28mm
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