Note the following :
1. The supply air CFM must be within the limitations shown
in the Unit Application Data Table 1.
2. Pulleys can be adjusted in half turn increments.
3. The tension on the belt should be adjusted as shown in
the Belt Adjustment Figure 9.
Start the supply air blower motor. Adjust the resistances in
both the supply and the return air duct systems to balance
the air distribution throughout the conditioned space. The job
specifications may require that this balancing be done by
someone other than the equipment installer.
Installation, Operation and Maintenance Manual : 036-1011(0806)
Page 15
CHECKING SUPPLY AIR CFM
The RPM of the supply air blower will depend on the required
CFM, the unit accessories or options and the static
resistances of both the supply and the return air duct
systems. With this information, the RPM for the supply air
blower and the motor pulley adjustment (turns open) can be
determined from the Fan Performance Data Tables.
High speed drive accessories (containing a smaller blower
pulley and a shorter belt) are available for applications
requiring the supply air blower to produce higher CFM and/or
higher static pressures. Refer to the Drive and Pulley Data
Table 5.
WARNING
FAILURE TO PROPERLY ADJUST THE TOTAL SYSTEM AIR
QUANTITY CAN RESULT IN EXTENSIVE BLOWER DAMAGE
SAFETY
This section of the IOM covers Safety Aspects applicable to
the York DMS Saber Roof Top Air Conditioners. Adherence
to the instructions detailed hereunder, will ensure the safety
of the operators, prevent damage to the equipment and
prevent accidents.
FIGURE 10 : UNIT NAMEPLATE
TERMINOLOGY
The internal section of the unit adjacent to moving parts and
electrical parts or devices is considered as the ‘danger zone’.
Prior to gaining access to these parts, it is necessary to
acquire the proper tools to deactivate the safety devices. The
operators are responsible for transport, installation, start up,
service and maintenance, including cleaning and trouble
shooting.
OPERATIONAL SAFETY
York DMS Saber Roof Top Packages Air Conditioners in
conformance to the highest standards of operational as well
as operator safety. Nevertheless, hazards may occur if the
units are used for purposes other than the designed use(s),
Units are operated by untrained staff and / or Units are not
operated in conformance with general standards prevalent in
the industry.
V kW Ph Hz rpm
Cos Ф
IP 54 ∆ 220 1.1 3 60 1110 5.4 0.72
ICL F Y 380 1.1 3 60 1110 3.1 0.72
IC 41 Y 460 1.1 3 60 1125 3.2 0.67
S 1 Y 380-415 1.1 3 50 935 3.3 0.69
Sr.#
Frame
QSX90L6B02
FIGURE 11 : MOTOR NAMEPLATE
FIGURE 9 : BELT ADJUSTMENT
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