York YCIV Series, Установка, эксплуатация и обслуживание

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JOHNSON CONTROLS
37
SECTION 4 - INSTALLATION
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
4
DUCTWORK CONNECTION
General Requirements
The following ductwork recommendations are intend-
ed to ensure satisfactory operation of the unit. Failure
to follow these recommendations could cause damage
to the unit, or loss of performance, and may invalidate
the warranty.
When ducting is to be fitted to the fan discharge it is
recommended that the duct should be the same cross-
sectional area as the fan outlet and straight for at least 3
ft (1 m) to obtain static regain from the fan. Ductwork
should be suspended with flexible hangers to prevent
noise and vibration being transmitted to the structure.
A flexible joint is also recommended between the duct
attached to the fan and the next section for the same
reason. Flexible connectors should not be allowed to
concertina.
The unit is not designed to take structural loading. No
significant amount of weight should be allowed to rest
on the fan outlet flange, deck assemblies or condenser
coil module. No more than 3 ft (1 m) of light construc-
tion ductwork should be supported by the unit. Where
cross winds may occur, any ductwork must be support-
ed to prevent side loading on the unit.
If the ducts from two or more fans are to be combined
into a common duct, back-flow dampers should be fit-
ted in the individual fan ducts. This will prevent re-
circulation of air when only one of the fans is running.
Units are supplied with outlet guards for safety and to
prevent damage to the fan blades. If these guards are
removed to fit ductwork, adequate alternative precau-
tions must be taken to ensure persons cannot be harmed
or put at risk from rotating fan blades.
ELECTRICAL CONNECTION
The following connection recommendations are in-
tended to ensure safe and satisfactory operation of the
unit. Failure to follow these recommendations could
cause harm to persons, or damage to the unit, and may
invalidate the warranty.
No additional controls (relays, etc.)
should be mounted in the control panel.
Power and control wiring not connected
to the control panel should not be run
through the control panel. If these pre-
cautions are not followed it could lead
to a risk of electrocution. In addition,
electrical noise could cause malfunctions
or damage the unit and its controls.
After power wiring connection, do not
switch on mains power to the unit. Some
internal components are live when the
mains are switched on and this must
only be done by “Authorized” persons
familiar with starting, operating, and
troubleshooting this type of equipment.