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Installation, Operation & Maintenance Manual ( IOPCKKS60220510C1)
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.
Figure 9: Belt Adjustment
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.
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
FIGURE 11 : Motor 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.
