Johnson Controls YVAHP072B31S, Service Manual

Page: 113 / 1796

(17-23/32 x 17-23/32)
(11-13/16 x 11-13/16)
Min. A Min. A
Min. 2-3/4
Min. 2-3/4
Electrical Box
Service Access
Door
Service Space
2-Suspension Bolt
(Field-Supplied)
Upper Side
Bottom Side
M10 or W3/8
Unit: inch
Service Manual
1-97
INSTALLATION
4.2 Initial Check
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clearance around it for maintenance working
space, as shown in Fig. 4.1 below.
Size
Model
A
COBS048B21S 11-13/16
COBS096B21S 15-3/4
Fig. 4.1 Maintenance Space
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strong to sustain the Change-Over Box. If the
ceiling is weak, abnormal sound and vibration
may occur.
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may be heard or perceived from the Change-
Over Box when the electric expansion valve in
the Change-Over Box is activated. Therefore,
take the following action to minimize the sound.
(A) Install the Change-Over Box inside the
ceiling. As for the ceiling material, select a
material like a plasterboard at least 1 inch
(9mm), which minimizes operation sound.
(B) Do not install the Change-Over Box in a
place near bedrooms or hospital rooms.
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may be heard or perceived from the Change-
Over Box when the operation is changed to
cooling/heating mode.
Therefore, install the Change-Over Box in the
ceiling of the corridor so that the refrigerant
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or humid place, such as a kitchen, to prevent
condensation on the outer surface of the
Change-Over Box.
When installing the Change-Over Box in such
places, apply additional insulation.
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Change-Over Box is installed in a hospital or
other facility where there are electronic waves
from medical equipment.
(A) Do not install the Change-Over Box where
the electromagnetic wave is directly radiated
to the electrical box or intermediate wiring
(transmission wiring).
(B) Install the Change-Over Box and
components as far as practical or at least
10 ft (3m) from the electromagnetic wave
radiator.
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emits harmful noises.
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for the refrigerant piping or electrical wiring
connection.
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Use only mounting points provided.