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ZONING SYSTEMS
The manufacturer does not currently
provide or support zoning with modulat-
ing furnace. However, zoning systems
can be installed with the system as long
as the zoning equipment manufacturers
specifications and installation instruc-
tions are met and followed.
The preferred zoning method is to use a
"bypass" system which is properly
installed for maximum efficiency. In
these systems, excess air is routed back
through the system to be used again –
this is opposed to a "dump" system in
which excess air is routed to a zone
where it is expected that the extra heat
or cooling would be least noticed.
If installed as a "bypass" system, the
installation must have an optional freeze
stat installed to prevent the coil from
icing with excess bypass cooling. Also,
if the zoning equipment manufacturer
provides a limit switch (usually provided
by the zoning manufacturer), this limit
must be installed in the system to pre-
vent the furnace from overheating.
TABLE 15
AIRFLOW AND CONDENSER SELECTION – PREMIUM (NON-COMMUNICATING) COOLING SYSTEMS (1 STAGE COOL ONLY)
(NOTE: SWITCH S5-2 OF THE IFC MUST BE IN THE "OFF" POSITION FOR OPTIMUM PERFORMANCE)
FURNACE
TONS
MODEL
2
(-)GFG-06 & -07
2-1/2
(-)GFG-06 & -07*
3
(-)GFG-09 & -10*
3-1/2
(-)GFG-09 & -10*
3
(-)GFG-12
3-1/2
(-)GFG-12
Evaporator coil must be the same width as the furnace OR one size larger in width than the gas furnace.
(See condenser spec. sheet, I&O and other literature for evaporator selection)
TABLE 16
AIRFLOW AND CONDENSER SELECTION – PREMIUM (NON-COMMUNICATING) COOLING SYSTEMS (2 STAGE COOL)
(NOTE: SWITCH S5-2 OF THE IFC MUST BE IN THE "OFF" POSITION FOR OPTIMUM PERFORMANCE)
FURNACE
TONS
MODEL
2
(-)GFG-06 & -07
3
(-)GFG-06 & -07
3
(-)GFG-09 & -10
3
(-)GFG-12
4
(-)GFG-09 & -10
4
(-)GFG-12
5
(-)GFGE-12
Evaporator coil must be the same width as the furnace OR one size larger in width than the gas furnace.
(See condenser spec. sheet, I&O and other literature for evaporator selection)
44
FURNACE INSTALLATION
WITH NON-COMMUNICAT-
ING HIGH-EFFICIENCY
PREMIUM COOLING OR
HEAT PUMP SYSTEMS
Furnace installation with Rheem/Ruud
-ASL or -ARL outdoor condensing units
can provide high efficiency (up to 16
SEER) cooling operation when com-
bined with proper evaporator coil. For
listed cooling equipment combinations,
see the -ARA or -ARL specification
sheets and Tables 15 and 16 of this
document. Using Tables 15 and 16 and
literature provided with the cooling
equipment, the installer needs to make
sure that the proper evaporator coil,
condensing coil and airflow is config-
ured to achieve rated efficiency.
In accordance with Rheem/Ruud cool-
ing equipment installation instructions,
do not install an evaporator coil or coil
casing to the furnace which is smaller
in width than the furnace cabinet.
APPROX.
CONDENSING
AIRFLOW
UNIT
WIDTH
(CFM)
17.5"
800
-ARA-24
17.5"
1000
-ARA-30
21"
1200
-ARA-36
21"
1400
-ARA-42
24.5"
1200
-ARA-36
24.5"
1400
-ARA-42
APPROX.
CONDENSING
AIRFLOW
UNIT
WIDTH
(CFM)
17.5"
800
-ARL/ASL-24
17.5"
1200
-ARL/ASL-36
21"
1200
-ARL/ASL-36
24.5"
1200
-ARL/ASL-36
21"
1600
-ARL/ASL-48
24.5"
1600
-ARL/ASL-48
24.5"
1800
-ARL/ASL-60
UP TO 16 SEER COOLING
OPERATION
Check the revision number of the
integrated furnace control (IFC) to
determine how best to configure
your furnace for high SEER opera-
tion.
To achieve high SEER operation,
turn dip switch S5-2 to the "off" posi-
tion (factory setting). This will enable
the furnace operation for 16 SEER.
Actual SEER values will vary and
depend on the equipment combina-
tion. Consult the specifications
sheets and installation instructions
of the cooling equipment purchased
for a listing of the SEER ratings for
a specific combination.
MOD. FURNACE IFC DIP-SWITCH SETTINGS
S3,#1
S3,#2
OFF
ON
ON
OFF
ON
ON
ON
ON
ON
ON
ON
ON
MOD. FURNACE IFC DIP-SWITCH SETTINGS
S3,#1
S3,#2
OFF
ON
OFF
OFF
ON
ON
ON
ON
ON
OFF
ON
OFF
OFF
OFF
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