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Unit Installation
5 Unit Installation
This section contains information on the following:
• Location Selection—page #10
• Protecting the Unit During Construction—page #11
• Return and Supply Air Duct Flanges Preparation—page #11
• Mounting Vertical (VT) Units—page #11
• Configuring the Horizontal Supply Air Orientation—page #11
• Mounting Horizontal (HZ) Units—page #12
• Installing the Hanging Bracket Kit—page #13
• Condensate Drain—page #14
• Duct System—page #15
• Piping—page #15
• Electrical—Power Supply Wiring—page #17
• Electrical—Low-Voltage Wiring—page #18
• Specific Application Considerations—page #20
• Water Quality Considerations—page #23
• Post-Installation System Checkout—page #25
• Pre-Start-Up—page #25
• Start-Up—page #26
• Commissioning—page #26
WARNING
This product is to be installed, serviced, and uninstalled by
professionals only.
NOTICE
DO NOT use RL series units for temporary heating, air
conditioning or ventilation during construction, especially
when plastering, sanding, or painting. Care should be taken to
avoid introduction of dust, paint, or debris into the air coil.
Warranty will be void if the units are used during construction.
5.1 Location Selection
Unit location selection is very important for proper installation,
functioning, and ease of servicing.
When selecting a location for the unit, the following conditions
must be met:
• Location must be indoors.
• The ambient temperatures must be maintained above
freezing.
10 |
• Location must be isolated from sleeping areas, private
offices, and other acoustically sensitive spaces.
• Mount the unit using an adequate slope of the condensate
lines to allow for proper drainage. If an appropriate slope
cannot be achieved, a field-supplied condensate pump may
be required.
• On horizontal units, adequate room must be below the unit
level for the condensate drain trap and avoid placing the unit
above piping, ducting, and electrical lines to facilitate future
removal and replacement of unit.
• Sufficient space for duct connection must be available. Do
not allow the weight of the duct work to rest on the unit.
• Adequate clearance for filter replacement and drain pan
cleaning must exist. DO NOT allow piping, conduit, etc. to
block filter access.
• Sufficient access to allow maintenance and servicing of the
fan and fan motor, compressor and coils must be allowed.
Removal of the entire unit from the closet should not be
necessary.
• An unobstructed path to the unit within the closet or
mechanical room must be present. Space should be
sufficient to allow return air to freely enter the unit.
• Ready access to water valves, fittings, and screwdriver
access to unit side panels, discharge collar, and all electrical
connections must be provided.
Where access to side panels is limited, pre-removal of the
control box side-mounting screws may be necessary for future
servicing.
NOTICE
RL series units are not approved for outdoor installation;
therefore, they must be installed inside a structure in a
conditioned space.
A "conditioned space" is a space within a building provided
with heated or cooled air or both (or surfaces) and, where
required, with humidification or dehumidification means to
maintain conditions for an acceptable thermal environment.
RL Series Heat Pumps — 8733842393 (2024/05)
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