Ducting - Rheem *96V series Installation Instructions Manual

DUCTING

External filter racks are available from the distributor. Use
the following part numbers when ordering:
RXGF-CA External Side Filter Rack Kit
RXGF-CB External Bottom Filter Rack Kit
RXGF-CC External Filter Rack Kit - Downflow
Proper air flow is required for the correct operation of this
furnace. Restricted air flow can cause erratic operation
and can damage the heat exchanger. The duct system
must carry the correct amount of air for heating and cool-
ing if summer air conditioning is used.
W RNING
SOME HEATING AIRFLOW VALUES MAY BE
HIGHER THAN THOSE REQUIRED FOR COOLING.
BE SURE TO SIZE DUCT FOR THE MAXIMUM POS-
SIBLE AIRFLOW VALUE.
SIZE AIRFLOW DISTRIBUTION SYSTEM TO AC-
CEPTABLE INDUSTRY STANDARDS AND METH-
ODS. TOTAL STATIC PRESSURE DROP OF THE AIR
DISTRIBUTION SYSTEM SHOULD NOT EXCEED
.8INCHES W.C. THIS WILL INCLUDE ANY AIR CON-
DITIONER COIL, AIR FILTRATION SYSTEM, ZONING
SYSTEM, DUCTWORK, ETC. REFER TO ADDED
EQUIPMENT TECHNICAL INFORMATION TO OBTAIN
PRESSURE DROP INFORMATION WHEN EQUIP-
MENT IS OPERATING AT RECOMMENDED HEAT-
ING OR COOLING CFMS.
IMPORTANT: When using outside air, design and adjust
the system to maintain a return air temperature ABOVE
55° F during the heating season.
NOTE: Return air grilles and warm air registers must not
be obstructed or closed.
NOTE: Both flanges on the supply and return openings
must be bent either up or down but cannot remain flat as
shipped from the factory. See Figure 9 for details.
W RNING
THE SOLID METAL BASE PAN MUST BE REMOVED
FROM THE TOP OF THE FURNACE BEFORE IN-
STALLING THE FURNACE. FAILURE TO REMOVE
THIS PAN FROM THE SHIPPING POSITION CAN RE-
SULT TO DAMAGE TO THE FURNACE OR EQUIP-
MENT.
W RNING
BLOWER AND BURNERS MUST NEVER BE OPERATED
WITHOUT THE BLOWER DOOR IN PLACE. THIS IS TO
PREVENT DRAWING GAS FUMES (WHICH COULD CON-
TAIN HAZARDOUS CARBON MONOXIDE) INTO THE
HOME THAT COULD RESULT IN PERSONAL INJURY OR
DEATH.
42
FIGURE 7
REMOVE SOLID BASE PANEL FROM THE
TOP BEFORE INSTALLING FURNACE
REMOVE SOLID
BASE FROM TOP
OF UNIT.
UPFLOW INSTALLATIONS
1. Position the unit to minimize long runs of duct or runs
of duct with many turns and elbows.
R
2. For side return: Cut an opening in the side. The open-
ing should be cut the full width and height of the
knockouts on the unit. See Figure 10.
3. If summer air conditioning is desired, position the in-
door coil on the supply-air side of the unit. Ensure
that no air can bypass the coil.
4. Connect the furnace to the supply air plenum.
5. Connect the return air ducting to the return-air open-
ing at the bottom and/or side of the unit. Make the
connections air-tight to prevent the migration of toxic
fumes and odors including carbon monoxide from mi-
grating into the living space.
6. If a filter is installed near the furnace, be sure to have
adequate space for installation and removal of the
unit filter.
7. NOTE: Where the maximum airflow is 1800 CFM or
more, BOTH sides or the bottom must be used for the
return air.
NOTE: DO NOT take return air from furnace rooms,
garages or cold areas. Avoid return air from utility rooms,
kitchens, laundry rooms and bathrooms.
ST-A1194-49