Ultra Classic (VT) Series Page 5
General 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.
Any access panel screws that would be difficult to remove
after the unit is installed should be removed prior to
setting the unit. These units are not approved for outdoor
installation and, therefore, must be installed inside the
structure being conditioned. Do not locate in areas where
ambient conditions are not maintained with 40-100°F and
up to 75% relative humidity.
Vertical Units Location and Access
Vertical Units are typically installed in a floor level
closet, basement, or in a small mechanical room. Install
units with adequate clearance to allow maintenance and
servicing. Conform to the following guidelines when
selecting unit location:
1. Provide adequate clearance for filter replacement and
drain pan cleaning. Do not block filter access with
piping, conduit or other materials. Refer to the unit
catalog for Vertical Unit Dimensions.
2. Provide access for fan and fan motor maintenance
and for servicing the compressor and coils without
removing the unit. Note: UltraClassic compressor
and refrigerant circuit service requires that left
side access be provided.
3. Provide an unobstructed path to the unit within the
closet or mechanical room. Space should be sufficient
to allow removal of the unit, if necessary.
4. Provide access to water valves and fittings and
screwdriver access to the unit side panels, discharge
collar and all electrical connections.
Setting Vertical Units
Vertical units are available in left or right air return
configurations. Vertical units should be mounted level on
a vibration absorbing pad or extruded polystyrene 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 Figure 1a).
Duct System
A field installed air outlet bracket is provided on vertical
units to facilitate duct connection. A flexible connector
is recommended for both discharge and return air duct
connections on metal duct systems. Uninsulated duct
should be insulated with a minimum of one-inch 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.
INSTALLATION
Figure 1a: Vertical unit mounting
If the unit is connected to existing ductwork, a previous
check should have been made to assure the ducts have the
capacity to handle the air required for the unit. 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 as necessary.
The duct system should be sized to handle the design
airflow quietly. 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
air flow is a problem, the airflow can be changed. See the
Blower Performance and Fan Speed sections for further
instruction (See Page 14).
Air Coil
To obtain maximum performance, the air coil should be
cleaned before start-up. A 10% solution of dishwasher
detergent and water is recommended for both sides of
coil, a thorough water rinse should follow.
Water Connections
The UltraClassic Heat Exchanger water connections are
swivel piping fittings that accept a 1" Male Pipe Thread
(MPT) connector. The swivel connector has a rubber
gasket seal similar to a garden hose gasket, which when
mated to the flush end of any 1" threaded pipe provides a
leak-free seal without the need for thread sealing tape or
compound. Check to insure that the rubber seal is in the
swivel connector prior to attempting any connection.
(The
rubber seals are shipped attached the swivel connector.)
DO
NOT OVERTIGHTEN or leaks may occur.
Never use flexible hoses smaller than 1" inside diameter
on the unit and limit hose length to 10 ft. per connection.
Check carefully for water leaks. Figure 3 shows a
manifold being used in an earth loop application. Flow
(pressure drop) and temperature measurements in the
configuration will represent the total flow going through
both coaxes regardless of which refrigerant circuits are
active. Figure 4 illustrates a well system using individual
connections. Flow and temperature measurements will
represent each refrigerant circuit.
Air Pad or extruded
polystyrene
