Rheem RHSL-HM4221AA User Manual

- With screwdriver or pencil, pull white tab with hole away from breaker while setting that
side of breaker into opening. When breaker is in place, release tab, locking circuit break-
er into location in opening.
- Repeat above operation for remaining breaker(s) (if more than one is provided).
- Replace single point wiring jumper bar, if it is used, on line side of breaker and tighten
securely.
- Double check wires and lugs to make sure all are secure and tight. Check to make sure
unit wiring to circuit breaker load lugs match that shown on the unit wiring diagram.
• RXHB combustible floor base is used for all unit sizes. Unit must be centered on com-
bustible base in the width dimension (14
3
/8”). (See Section 14.0 for more information
on the combustible floor base.)
DRIP LOOP: When installing the unit in down-flow or horizontal-right positions, make
sure that the wires coming from the motor form a proper drip loop. This allows water to
cascade off the lowest point of the wiring before it enters the motor head. This may
require cutting the wire tie and installing a new wire tie to form this loop.
3.3 HORIZONTAL
Horizontal left is the default factory configuration for “HM” (airflow direction) units.
Conversion to Horizontal: A vertical upflow unit (AU) may be converted to horizontal by
removing the indoor coil and installing horizontal drain pan on coil as shown for right
hand or left hand air supply. Reinstall coil in unit as shown for right or left hand air sup-
ply. See Figures 6 & 7. (See Section 14.0 for more information on the Horizontal Adapter
Kit.)
• Rotate unit into the downflow position, with the coil compartment on top and the blower com-
partment on bottom.
• A second set of coil rails must be field installed for vertical down-flow and horizontal
right applications. Fastener clearance holes will need to be drilled in the cabinet sides
(proper hole locations are marked with “dimples” for this purpose). Note that the shorter
(no notch) coil rail must be mounted on the left-hand side to provide clearance for the
drain-pan condensate connection boss.
• Reinstall the indoor coil 180° from original position. Ensure the retaining channel is fully
engaged with the coil rail. (See Figure 6, Detail A.)
• Secondary drain pan kits RXBM- are required when the unit is configured for the hori-
zontal right position over a finished ceiling and/or living space. (See Section 14.0:
Accessories - Kits - Parts.)
IMPORTANT: Units cannot be installed horizontally laying on or suspended from the
back of the unit.
11
!
WARNING
The RXHB-17, RXHB-21 or RXHB-24 combustible floor base is required
when some units with electric heat are applied downflow on combustible
flooring. Failure to use the base can cause a fire resulting in property dam-
age, personal injury or death. See CLEARANCES for units requiring a com-
bustible floor base. See the accessory section in this manual for com-
bustible floor base RXHB.
FIGURE 5
ROTATING CIRCUIT BREAKER

Rheem RHSL-HM4221AA Specifications

General

Brand	Rheem
Model	RHSL-HM4221AA
Category	Air Handlers
Language	English