Rheem CLASSIC 90 PLUS User manual

FORM NO. G11-502 REV. 1
Supersedes Form No. G11-502
GAS FURNACES
RGTC- SERIES
Models with Input Rates
from 45,000 to 105,000 BTU/HR
[13.19 to 30.77 kW]
(All Models up to 95%A.F.U.E.✝)
CLASSIC®90 PLUS
95% A.F.U.E.
DOWNFLOW/
HORIZONTAL
GAS FURNACES
The Rheem Classic®90 Plus High Efficiency line of down-
flow/horizontal gas furnaces are designed for utility rooms,
closets, alcoves, attics or crawl spaces. The RGTC is
shipped in the downflow configuration and is easily con-
verted for horizontal left-hand airflow applications.
The design is certified by CSA.
Features
■Heat exchanger is constructed of all stainless steel for
maximum corrosion resistance and thermal fatigue
reliability.
■Low profile “34 inch” design is lighter and easier to han-
dle and leaves room for optional accessories.
■Top electrical connections, left or right gas and conden-
sate drainage connections on downflow models.
■Condensate drain for horizontal application provided
standard.
■Integrated control board manages all operational func-
tions and provides hookups for humidifier and electronic
air cleaner.
■An insulated blower compartment, a slow-opening gas
valve and a specially designed inducer system make it
one of the quietest furnaces on the market today.
■Pre-paint galvanized steel cabinet.
■Molded permanent filters.
■Optional indoor or outdoor combustion air.
■Transformer and control fuse protection.
■Control board diagnostics.
A variety of cooling coils and plenums designed to use with
the Classic®90 Plus gas furnaces are available as optional
accessories for air conditioning models.
✝A.F.U.E. (Annual Fuel Utilization Efficiency) calculated in accordance with Department
of Energy test procedures.
“Visit www.Rheem.com
for complete details.”

2 Rheem Heating, Cooling and Water Heating
STANDARD EQUIPMENT
Completely assembled and wired; heat exchanger; primary: 409 and aluminized
409 stainless steel, secondary: 29-4C stainless steel; induced draft; pressure
switch; redundant main gas control; blower compartment door safety switch;
solid state time on/off blower control; limit controls; manual shut-off valve;
100% safety lock out; cool fan off delay; field selectable heat fan off delay; one
hour automatic retry; power and self-test diagnostics; flame sense current
diagnostics; electronic air cleaner connections; twinning (built-in) features;
humidifier connections; humidifier on/off delay; low speed continuous fan
option; single speed option for heating and cooling applications; transformer;
direct drive, multi-speed blower motor. (Please note: a thermostat is not
included as standard equipment.)
OPTIONAL EQUIPMENT
NOTE: Furnace is not listed for use with fuels other than natural or L.P.
(propane) gas.
All models can be converted by a qualified distributor or local service dealer to
use L.P. (propane) gas without changing burners. Factory approved kits must
be used to convert from natural to L.P. (propane) gas and may be ordered as
optional accessories from a parts distributor.
For L.P. (propane) operation, refer to Conversion Kit Index Form.
WARNING
THIS FURNACE IS NOT APPROVED
OR RECOMMENDED
FOR USE IN MOBILE HOMES
CLASSIC®90 PLUS HIGH EFFICIENCY
DOWNFLOW/HORIZONTAL
GAS FURNACE
PRIMARYAND SECONDARY
HEAT EXCHANGER
REMOTE SENSOR
DIRECT SPARK IGNITION
IN-SHOT BURNERS
PRESSURE SWITCH DRAFT INDUCER
INTEGRATED
FURNACE
CONTROL
GAS VALVE AND
MANIFOLD
FUSE PROTECTION

Rheem Heating, Cooling and Water Heating 3
RG T C
—06E AMES
Rheem Gas
Furnace
Downflow/
Horizontal
Condensing
Gas Furnace
Design
Series
Heating Input
Designation
Variations
A= Std.
B= Wide
Cabinet
Blower Size
M= 11 x 7
[279 x 178 mm]
R= 11 x 10
[279 x 254 mm]
Z= 12 x 11
[305 x 279 mm]
Heat/Cool
Designation
E= 1100-1300 CFM
[519-613.5 L/s]
G= 1500-1700 CFM
[707.9-802.3 L/s]
J= 1900-2100 CFM
[896.7-991.1 L/s]
Fuel Code
S= U.S. and
Canadian Natural
Gas
Electric
Ignition
04E
06E
07E
09E
10E
Input
BTU/HR
45,000 [13 kW]
60,000 [17.6 kW]
75,000 [20.5 kW]
90,000 [26.4 kW]
105,000 [30.7 kW]
MODEL NUMBERS RGTC-04EMAES RGTC-06EMAES RGTC-07ERBGS RGTC-09EZAJS RGTC-10ERBJS
INPUT-BTU/HR [kW] ➀45,000 [13.19] 60,000 [17.58] 75,000 [21.98] 90,000 [26.38] 105,000 [30.77]
HEATING CAPACITY BTU/HR [kW] 41,000 [12.02] 56,000 [16.41] 69,000 [20.22] 84,000 [24.62] 97,000 [28.43]
HIGH ALTITUDE INPUT [kW] ➁40,500 [11.87] 54,000 [15.83] 67,500 [19.78] 81,000 [23.74] 94,500 [27.70]
HIGH ALTITUDE OUTPUT
CAPACITY [kW] ➁37,000 [10.84] 50,400 [14.77] 63,000 [18.46] 75,000 [21.98] 87,500 [25.64]
BLOWER (D x W) [mm] 11 x 7 [279 x 178] 11 x 7 [279 x 178] 11 x 10 [279 x 254] 12 x 11 [305 x 279] 11 x 10 [279 x 254]
MOTOR H.P. [W]
SPEEDS-TYPE 1/2[373]-4-PSC 1/2[373]-4-PSC 1/2[373]-4-PSC 3/4[559]-4-PSC 3/4[559]-4-PSC
MOTOR FULL LOAD AMPS 6.8 6.8 6.8 9.5 9.5
HEATING SPEED MED-LOW MED-HI MED-HI MED-HI MED-HI
COOLING SPEED HIGH HIGH HIGH HIGH HIGH
HEAT EXT. STATIC PRESSURE
(IN. W.C.) [kPa] .10 [.025] .12 [.029] .12 [.029] .15 [.037] .20 [.049]
RATED EXT. STATIC PRESSURE
(IN. W.C.) [kPa] .50 [.124] .50 [.124] .50 [.124] .50 [.124] .50 [.124]
HEATING CFM @ .2" W.C.
E.S.P. [L/s] 866 [409] 1122 [530] 1516 [716] 1698 [802] 1812 [856]
COOLING CFM @ .5" W.C.
E.S.P. [L/s] 1220 [576] 1242 [586] 1559 [736] 1850 [873] 1977 [934]
TEMPERATURE RISE RANGE
°F [°C] 30-60 [16.7-33.3] 30-60 [16.7-33.3] 30-60 [16.7-33.3] 30-60 [16.7-33.3] 35-65 [19.4-36.1]
APPROX. SHIPPING WEIGHT
(LBS.) [kg] 123 126 137 148 160
AFUE ➂95.0% 95.0% 95.0% 95.0% 95.0%
STANDARD FILTER [mm] (2) 12" x 20"
[305 x 508]
(2) 12" x 20"
[305 x 508]
(2) 12" x 20"
[305 x 508]
(2) 12" x 20"
[305 x 508]
(2) 14" x 20"
[356 x 508]
BEFORE PURCHASING THIS APPLIANCE, READ IMPORTANT ENERGY COST AND EFFICIENCY INFORMATION AVAILABLE
FROM YOUR RETAILER.
PHYSICAL DATA AND SPECIFICATIONS
DOWNFLOW/HORIZONTAL MODELS U.S. and Canadian Models
NOTES: All models are 115V, 60HZ, 1
ø.
Gas connection size for all models is 1/2" [13 mm] N.P.T.
➀See Conversion Kit Index Form for high altitude derate.
➁ Canadian installations only.
➂In accordance with D.O.E. test procedures.
MODEL IDENTIFICATION
[ ] Designates Metric Conversions
GENERAL TERMS OF LIMITED WARRANTY
Rheem will furnish a replacement for any part of this product
which fails in normal use and service within the applicable
period stated, in accordance with the terms of the limited
warranty.
For Complete Details of the LimitedWarranty, Including ApplicableTerms
and Conditions, SeeYour Local Installer or Contact the Manufacturer for
a Copy.
Primary and Secondary Heat Exchanger.......Limited Lifetime
Conditional Parts (Registration Required) .......Ten (10) Years

4 Rheem Heating, Cooling and Water Heating
DOWNFLOW MODELS
IMPORTANT NOTE: Horizontal furnace may be installed for horizontal left hand air supply ONLY. The condensate trap provided for horizontal application must be
installed in the field beneath the unit as directed in the furnace Installation & Operating Instructions.
MODEL
RGTC- A B C D E F LEFT SIDE
MINIMUM CLEARANCE (IN.) [mm] SHIP
WGTS.
[kg]
RIGHT
SIDE BACK TOP FRONT VENT
04 171/2[445] 1611/32 [415] 155/8[397] 2 [51] 165/8[422] 137/8[352] 0 0 0 1 [25] 2 [51] 0123 [56]
06 171/2[445] 1611/32 [415] 155/8[397] 2 [51] 165/8[422] 137/8[352] 0 0 0 1 [25] 2 [51] 0126 [57]
07 21 [533] 1927/32 [504] 193/16 [486] 2 [51] 201/8[511] 173/8[441] 0 0 0 1 [25] 2 [51] 0137 [62]
09 21 [533] 1927/32 [504] 193/16 [486] 2 [51] 201/8[511] 173/8[441] 0 0 0 1 [25] 2 [51] 0148 [67]
10 241/2[622] 2311/32 [593] 225/8 [575] 2 [51] 235/8 [600] 207/8[530] 0 0 0 1 [25] 2 [51] 0160 [73]
[ ] Designates Metric Conversions

Rheem Heating, Cooling and Water Heating 5
HORIZONTAL MODELS
IMPORTANT NOTE: Horizontal furnace may be installed for horizontal left hand air supply ONLY. The condensate trap provided for horizontal application must be
installed in the field beneath the unit as directed in the furnace Installation & Operating Instructions.
[ ] Designates Metric Conversions

FILTER RACK FILTER SIZES* INCHES [mm]
MODEL RGTC- RXGF-CC
04 (2) 12 x 20 [305 x 508]
06 (2) 12 x 20 [305 x 508]
07 (2) 12 x 20 [305 x 508]
09 (2) 12 x 20 [305 x 508]
10 (2) 14 x 20 [356 x 508]
FURNACE
WIDTH
IN. [mm]
PLENUM
WIDTH
IN. [mm]
PLENUM ADAPTER
DOWNFLOW
COIL
PLENUM
171/2[445] 161/4[413] RXAA-C186 RXAL-B16BU
171/2[445] 201/4[514] RXAA-C173 RXAL-B20BU
171/2[445] 215/8[549] RXAA-C187 RXAL-B21BU
171/2[445] 251/4[641] RXAA-C174 RXAL-B25BU
211/2[533] 251/4[641] RXAA-C175 RXAL-B25BU
211/2[533] 221/4[565] RXAA-C176 RXAL-B22BU
241/2[622] 251/4[641] RXAA-C177 RXAL-B25BU
241/2[622] 215/8[549] RXAA-C187 RXAL-B21BU
211/2[533] 215/8[549] RXAA-C188 RXAL-B21BU
MODEL
RGTC-
BLOWER
SIZE
IN. [mm]
MOTOR
H.P.
[W]
BLOWER
SPEED
CFM [L/s] AIR DELIVERY
EXTERNAL STATIC PRESSURE INCHES WATER COLUMN [kPa]
09 12 x 11
[305 x 279]
3/4
[559]
LOW*
MED-L0
MED-HI
HIGH
1213 [573]
1504 [710]
1734 [819]
2111 [997]
1196 [565]
1474 [696]
1698 [802]
2059 [972]
1179 [557]
1443 [681]
1662 [785]
2007 [948]
1158 [547]
1415 [668]
1621 [766]
1946 [919]
1136 [536]
1387 [655]
1579 [746]
1885 [890]
1108 [523]
1348 [637]
1526 [721]
1821 [860]
0.1 [.02] 0.2 [.05] 0.3 [.07] 0.4 [.10] 0.5 [.12] 0.6 [.15] 0.7 [.17]
04 11 x 7
[279 x 178]
1/2
[373]
LOW
MED-LO
MED-HI
HIGH
794 [375]
890 [420]
1110 [524]
1383 [653]
765 [361]
866 [409]
1084 [512]
1350 [638]
735 [347]
842 [398]
1057 [499]
1317 [622]
704 [332]
811 [383]
1023 [483]
1274 [602]
672 [317]
779 [368]
989 [467]
1230 [581]
633 [299]
750 [354]
946 [447]
1171 [553]
594 [281]
721 [341]
902 [426]
1112 [525]
06 11 x 7
[279 x 178]
1/2
[373]
LOW*
MED-L0
MED-HI
HIGH
816 [385]
924 [436]
1164 [550]
1409 [665]
792 [374]
895 [423]
1122 [530]
1367 [646]
767 [362]
866 [409]
1080 [510]
1325 [626]
739 [349]
832 [393]
1044 [493]
1284 [606]
711 [336]
798 [377]
1008 [476]
1242 [586]
686 [324]
754 [356]
966 [456]
1195 [564]
661 [312]
710 [335]
923 [436]
1148 [542]
07 11 x 10
[279 x 254]
1/2
[373]
LOW*
MED-L0
MED-HI
HIGH
1126 [532]
1338 [632]
1555 [734]
1743 [823]
1097 [518]
1309 [618]
1516 [716]
1696 [801]
1068 [504]
1280 [604]
1477 [698]
1649 [779]
1036 [489]
1253 [592]
1440 [680]
1604 [757]
1003 [473]
1225 [579]
1402 [662]
1559 [736]
963 [455]
1185 [560]
1349 [637]
1501 [709]
923 [436]
1145 [541]
1295 [612]
1442 [681]
1079 [510]
1308 [618]
1472 [695]
1756 [829]
10 11 x 10
[279 x 254]
3/4
[559]
LOW*
MED-L0
MED-HI
HIGH
1324 [625]
1617 [764]
1842 [870]
2204 [1041]
1309 [618]
1505 [753]
1812 [856]
2153 [1017]
1294 [611]
1573 [743]
1781 [841]
2102 [993]
1272 [601]
1533 [724]
1728 [816]
2040 [963]
1250 [590]
1493 [705]
1674 [791]
1977 [934]
1221 [577]
1448 [684]
1619 [765]
1905 [900]
1191 [562]
1402 [662]
1564 [739]
1833 [866]
ACCESSORIES—DOWNFLOW
PLENUM DATA FOR “A” COILS
Plenum adapters are required in some instances for use on downflow applications
when plenum and furnace size do not match.
VENT TERMINATION KITS CONCENTRIC: HORIZONTAL/
VERTICAL =
RXGY-E03A (US & Canadian Installations)
HORIZONTAL TWO PIPE: RXGY-D02, RXGY-D03, RXGY-D04
(US Installations)
RXGY-D02A, RXGY-D03A, RXGY-D04A (Canadian Installations)
RXGY-G02 (US Only)
CONDENSATE PUMP KIT: RXGY-B01
NEUTRALIZER KIT: RXGY-A01
COMBUSTIBLE FLOOR BASE: RXGC-B17
RXGC-B21
RXGC-B24
EXTERNAL FILTER RACK: RXGF-CC
*Filter racks are shipped without filters.
Filters shipped with furnace may be used or a suitable 1" [25.4 mm] filter.
[ ] Designates Metric Conversions
BLOWER PERFORMANCE DATA—RGTC MODELS
NOTE: Recommended heating blower speeds are in bold.
*Not allowed for heating speed tap.
NOTE: CFM values represent furnace-only airflow ratings.
NOTE: See Form Number C11-206 for MultiFlex®coil data.
FOSSIL FUEL KIT: RXPF-F01 RXPF-F02 (TVA)
6 Rheem Heating, Cooling and Water Heating
FOR HIGH ALTITUDES
NOTE: For Canadian installations only, an optional derate (manifold gas
pressure reduction) method may be used to adjust the furnace for
altitude. See Installation Instructions for more information. This
optional method may NOT be used for U.S. installations.
FOR LEFT SIDE (ALTERNATE) CONDENSATE
DRAIN KIT: RXGY-H01 (All Models)

Rheem Heating, Cooling and Water Heating 7
NOTES

Before proceeding with installation, refer
to installation instructions packaged
with each model, as well as complying
with all Federal, State, Provincial, and
Local codes, regulations, and practices.
Rheem Heating,
Cooling and
Water Heating
P.O. Box 17010, Fort Smith, AR 72917
“In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice.”
PRINTED IN U.S.A. 10-09 DC FORM NO. G11-502 REV. 1
Supersedes Form No. G11-502