York T2GY, Installer'S Manual

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5
T2GY INSTALLER’S GUIDE
Moving and Storage
Move units in the normal “Up” orientation. Vertical units
are not to be moved, but may be stored one upon another
to a maximum height of two units. When the equipment is
received, all items should be carefully checked against the
bill of lading to be sure all crates and cartons have been
received. Examine units for shipping damage, removing
the units from the packaging if necessary. Units in question
should also be internally inspected. If any damage is noted,
the carrier should make the proper notation on the delivery
receipt, acknowledging the damage.
Unit Location
Locate the unit in an indoor area that allows easy removal
of the filter and access panels, and has enough space
for service personnel to perform maintenance or repair.
Provide sufficient room to make water, electrical and duct
connection(s). If the unit is located in a confined space,
such as a closet, provisions must be made for return air
to freely enter the space by means of a louvered door,
etc. Care should be taken when units are located in
unconditioned spaces to prevent damage from frozen
water lines and excessive heat that could damage
electrical components.
Safety Considerations
Installation and servicing of heating and air conditioning
equipment can be hazardous due to system pressure and
electrical components. Only trained and qualified service
personnel should install, repair or service heating and air
conditioning equipment.
Untrained personnel can perform basic maintenance
functions of cleaning coils and cleaning and replacing
filters. All other operations should be performed by trained
service personnel. When working on air conditioning
equipment, observe precautions in the literature, tags and
labels attached to the unit and other safety precautions
that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have
fire extinguisher available for all brazing operations.
WARNING: Before performing service or
maintenance operations on the system, turn off
main power switches to the unit. Turn off accessory
heater power switch if applicable. Electrical shock
could cause serious personal injury.
CAUTION: A minimum of 24 in. clearance should
be allowed for access to front access panel.
General Installation Information
Vertical Unit Mounting
Vibration
Absorbing
Mesh
Air Pad
Filter Rack Conversion
A 1 in. electrostatic filter is shipped with the heat pump. To field
convert the filter rack to use 2 in. filters, simply remove the
provided plastic push pins from the holes located in the filter rack.
There are holes on the top and bottom of the rack, that the push
pins must be removed from, for field conversion to 2 in. filters.
Setting Vertical Units
Prior to setting the unit in place, remove and discard the
compressor hold down shipping bolt located at the front of the
compressor mounting bracket.
Vertical units are available in left or right hand return configuration.
Vertical units should be mounted level on a vibration absorbing
pad slightly larger than the base to provide isolation between the
unit and the floor. It is not necessary to anchor the unit to the floor
(See Vertical Unit Mounting illustration).
Duct System
An air outlet collar is provided on vertical top flow units to facilitate
a duct connection, which is shipped inside the unit. A flexible
connector is recommended for discharge and return air duct
connections on metal duct systems. Uninsulated duct should be
insulated with a minimum of 1 in. duct insulation. Application of
the unit to uninsulated ductwork in an unconditioned space is not
recommended as the unit’s performance will be adversely affected.
If the unit is connected to existing ductwork, a previous check
should have been made to assure that the duct has the capacity
to handle the air required for the unit application. If ducting is
too small, as in the replacement of heating only systems, larger
ductwork should be installed. All existing ductwork should be
checked for leaks and repaired when necessary.
The duct system should be sized to handle the design airflow qui-
etly. To maximize sound attenuation of the unit blower, the supply
and return plenums should include internal duct liner of glass fiber
or be of ductboard construction for the first few feet. If air noise or
excessive airflow is a problem, the blower speed can be changed.
See the Blower Performance and Blower Speed sections.