2.0 GENERAL INFORMATION
2.1 IMPORTANT INFORMATION ABOUT EFFICIENCY AND INDOOR
2.1
AIR QUALITY
Central cooling and heating equipment is only as efficient as the duct system that car-
ries the cooled or heated air. To maintain efficiency, comfort and good indoor air quality,
it is important to have the proper balance between the air being supplied to each room
and the air returning to the cooling and heating equipment.
CAUTION
(SEE SECTION 3.2: VERTICAL UPFLOW & HORIZONTAL LEFT)
Horizontal units must be configured for right hand air supply. Horizontal drain
pan must be located under indoor coil. Failure to use the drain pan can result
in property damage.
5
!
WARNING
(SEE SECTION 3.3: VERTICAL DOWNFLOW & HORIZONTAL RIGHT)
The RXHB-17, RXHB-21, or RXHB-24 combustible floor base is required when
certain units are applied downflow on combustible flooring. Failure to use the
base can cause a fire resulting in property damage, personal injury or death.
See clearances for units requiring a combustible floor base. See the accessory
section in this manual for combustible floor base RXHB-.
!
CAUTION
(SEE SECTION 13.7: ECM CONTROL MODULE REPLACEMENT)
Reversing the 5-pin connector on the ECM motor causes immediate failure of
the control module.
CAUTION
(SEE SECTION 13.2: INDOOR COIL - DRAIN PAN - DRAIN LINE)
In compliance with recognized codes, it is recommended that an auxiliary
drain pan be installed under all evaporator coils or units containing evaporator
coils that are located in any area of a structure where damage to the building
or building contents may occur as a result of an overflow of the coil drain pan
or a stoppage in the primary condensate drain piping. See accessory section
in this manual for secondary horizontal drain pan RXBM-.
When used on cooling applications, excessive sweating may occur when unit
is installed in an unconditioned space. This can result in property damage.
!
NOTICE
Improper installation, or installation not made in accordance with the
Underwriters Laboratory (UL) certification or these instructions, can result
in unsatisfactory operation and/or dangerous conditions and are not cov-
ered by the unit warranty.
!
NOTICE
In compliance with recognized codes, it is recommended that an auxiliary
drain pan be installed under all evaporator coils or units containing evapo-
rator coils that are located in any area of a structure where damage to the
building or building contents may occur as a result of an overflow of the
coil drain pan or a stoppage in the primary condensate drain piping. See
accessories section of these instructions for auxiliary horizontal overflow
pan information (model RXBM).
!
NOTICE
Summary of Contents for RHPL-HM2421JC
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