Luxaire G8D08016UHB11 Quick start guide

TECHNICAL GUIDE
80 AFUE DELUXE TWO STAGE
MULTI-POSITION
GAS-FIRED FURNACES
57-120 MBH INPUT
MID-EFFICIENCY
INDUCEDCOMBUSTION
MODELS: G8D-UH / L8D-UH
036-21013-002 Rev. A (5/00)
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
DESCRIPTION
These hi
g
h efficiency, compact units employ induced combustion,
reliable hot surface i
g
nition and hi
g
h heat transfer tubular heat
exchan
g
ers. The units are factory shipped for installation in upflow
or horizontal applications.
These furnaces are desi
g
ned for residential installation in a base-
ment, closet, alcove, attic, recreation room or
g
ara
g
e and are also
ideal for commercial applications. All units are factory assembled,
wired and tested to assure safe dependable and economical instal-
lation and operation.
These units are available in standard natural
g
as or dedicated
LoNox models.
These units are Cate
g
ory I listed and may be common vented with
another
g
as appliance as allowed by the National Fuel Gas Code
ANSI Z223.1 (latest edition).
WARRANTY
FEATURES
•Twosta
g
e heatin
g
operation includes:
- Two sta
g
e
g
as valve
- Two sta
g
e inducer operation
- Two speed blower operation
This provides both increased comfort level and very quiet unit
operation
• Delay timer allows two sta
g
e operation with sin
g
le sta
g
e
thermostat
• Acoustically insulated blower compartment for reduced blower
sound level
• Humidifier and Electronic Air Cleaner control wires are pro-
vided to the power wirin
g
box for easy field connection.
• 100% shut off main
g
as valve for added safety
• Easily applied in upflow, horizontal left or horizontal ri
g
ht
installation with no conversion necessary
• Dedicated LoNox models
• Rollout safety control
• Low unit amp requirement for easy replacement application
•Hi
g
h quality two speed inducer motor for quiet operation
• Built-in self dia
g
nostics with fault code display
•Hi
g
h velocity filter provided for field installation
• 40 VA control transformer fuse protected
• Coolin
g
relay supplied for easy installation of add-on coolin
g
• Multi-speed PSC, direct-drive blower motor to match coolin
g
reuirements
• Adjustable fan-off settin
g
s to eliminate “cold-blow”
• Compact 40-in. hei
g
ht allows installation in small space
confines
• All models are propane convertible, except LoNox models
20-
y
ear limited warrant
y
on the heat exchan
g
er.
10-
y
ear heat exchan
g
er warrant
y
on commercial applications.
5-
y
ear limited parts warrant
y
.

036-21013-002 Rev. A (5/00) Luxaire
2Unitary Products Group
TWO-STAGE UPFLOW/HORIZONTAL FURNACE DIMENSIONS
TWO-STAGE UPFLOW/HORIZONTAL RATINGS & PHYSICAL/ELECTRICAL DATA
MODELS G8D--UH /
L8D-UH CABINET
WIDTH (IN.) AFUE*
* AFUE numbers are determined in accordance with DOE test procedures.
LOW FIRE
TEMPRISE
°F
HIGH
FIRE
TEMP
RISE °F
MAX.
OUTLET
AIR TEMP
°F
BLOWER TOTAL
UNIT
AMPS
MAX.
OVER-
CURRENT
PROTECT†
†Wire size and overcurrent protection must comply with the National Electrical Code (NFPA-70-latest edition).
•For altitudes above 2,000 ft., reduce capacit
y
4% for each 1,000 ft. above sea level. Refer to Form 650.74-N1.1V.
•Wire size based on copper conductors, 60°C, 3% volta
g
e drop.
•Continuous return air temperature must not be below 55°F.
MIN WIRE
SIZE
(AWG) @
75 FT.
ONE WAY†
OPER
WGT.
(LBS)
INPUT
MBH H/LOUTPUT
MBH H/LNOM. CFM HP AMPS SIZE (IN)
57/42 46/34 1200 “A”14-1/2 80.0 25 - 55 35 - 65 165 1/3 6.2 10 x 7 9.0 20 14 105
80/59 64/48 1200 “A”14-1/2 80.0 30 - 60 40 - 70 175 1/3 6.2 10 x 7 9.0 20 14 117
80/59 64/48 1600 “B”17-1/2 80.0 25 - 55 25 - 55 160 3/4 11.5 11 x 8 12.0 20 14 126
100/65 80/53 1200 “B”17-1/2 80.0 25 - 55 40 - 70 170 1/2 7.0 10 x 8 12.0 20 14 128
100/65 80/53 2000 “C”21 80.0 25 - 55 30 - 60 160 1 12.2 11 x 10 14.0 20 12 145
120/78 96/64 1600 “C”21 80.0 25 - 55 45 - 75 180 1/2 10.4 10 x 10 12.0 20 14 145
120/78 96/64 2000 “C”21 80.0 25 - 55 35 - 65 170 1 12.2 11 x 10 14.0 20 12 147
TOP IMAGE
Vent Connection
(vent size)
D
20
B
Power
Wiring
7/ " K.O.
FRONT
E
5
F
1-7/
BOTTOM IMAGE
1-1/
20
FRONT
1-1/
A
C
7-3/
3/4
FRONTFRONT LEFT SIDELEFT SIDE RIGHT SIDERIGHT SIDE
OPTIONAL SIDE
RETURN CUT-OUT
(EITHER SIDE)
14
GAS INLET
1-1/4" X 2-1/2"
2
2-1/4
1-1/8
D
(Vent Connection)
14-3/4
5-3/8
8-3/4
2-1/2
16
13-3/4
POWER WIRING
ACCESS
WIRING
7/8" K.O.
32-1/2
T'STAT WIRING
7/8" K.O.
7/8" HOLE
B
40
A 28-1/2
20
23-1/2
Upflow/Horizontal
Models G8D-UH /
L8D-UH ABCDEF
G8D06012UHA11*
* L in the first character indicates LoNox.
14-1/2 13-1/4 10-1/8 4 10-1/8 3-3/4
G8D08012UHA11*14-1/2 13-1/4 10-1/8 4 10-1/8 3-3/4
G8D08016UHB11*17-1/2 16-1/4 13-1/8 4 11-5/8 3-3/4
G8D10012UHB11 17-1/2 16-1/4 13-1/8 4 11-5/8 3-3/4
G8D10020UHC11*21 19-3/4 16-5/8 4 13-3/8 3-3/4
G8D12016UHC11 21 19-3/4 16-5/8 4 13-3/8 3-3/4
G8D12020UHC11*21 19-3/4 16-5/8 4 13-3/8 3-3/4

Luxaire 036-21013-002 Rev. A (5/00)
Unitary Products Group 3
BLOWER PERFORMANCE - CFM - UPFLOW/HORIZONTAL (WITHOUT FILTER)
NOTE: Data below reflects air flows with sin
g
le return openin
g
, either left or ri
g
ht side or bottom.
MODELS: G8D--UH
/ L8D-UH*SPEED
TAP
EXTERNAL STATIC PRESSURE, INCHES W.C.
0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
60 / 48 / 1200 / "A"†
80 / 64 / 1200 / "A"†
HIGH 1580 1530 1470 1405 1330 1245 1150 1045 890 650
MED-HIGH 1110 1100 1075 1060 1030 980 920 835 680 520
MED-LOW 845 840 830 815 790 750 670 595 480 320
LOW 675 665 660 645 620 585 530 455 360 255
100 / 80 / 1200 / "B" HIGH 1675 1645 1595 1530 1465 1385 1280 1155 1025 810 MED 1270 1260 1250 1240 1215 1185 1125 1035 910 695
LOW 955 950 945 935 920 905 865 810 685 510
80 / 64 / 1600 / "B"†HIGH 1970 1935 1900 1850 1795 1735 1660 1590 1495 1395
MED 1445 1435 1425 1415 1405 1375 1350 1300 1240 1160
LOW 1245 1235 1225 1215 1205 1190 1170 1135 1090 995
120 / 96 / 1600 / "C" HIGH 2040 1975 1925 1855 1780 1695 1610 1505 1380 1225 MED 1725 1685 1650 1610 1555 1500 1425 1340 1220 1075
LOW 1365 1355 1325 1290 1265 1250 1210 1140 1045 940
100 / 80 / 2000 / "C"†
120 / 96 / 2000 / "C"†
HIGH 2400 2320 2275 2200 2115 2025 1930 1825 1700 1570
MED 2050 2025 1980 1930 1855 1805 1720 1635 1530 1400
LOW 1690 1675 1660 1630 1610 1560 1500 1430 1330 1225
NOTE: Data below reflects airflows with two return openin
g
s - two sides or one side and bottom.
100 / 80 / 2000 / "C"†
120 / 96 / 2000 / "C"†
HIGH 2405 2340 2275 2210 2130 2050 1955 1840 1725 1600
MED 2005 1990 1965 1935 1880 1815 1725 1635 1535 1410
LOW 1655 1640 1625 1610 1585 1540 1485 1420 1340 1235
* Input / Output / CFM / Cabinet Type (A = 14-1/2, B = 17-1/2, C = 21, D = 24-1/2)
•Airflow is expressed in standard cubic feet per minute
•Motor voltage at 115V
†Indicates LoNox models available
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UPFLOW MODELS - ELECTRICAL WIRING

036-21013-002 Rev. A (5/00) Luxaire
4Unitary Products Group
FILTER PERFORMANCE
The airflow capacity data published in Blower Performance
Table above, represents blower performance WITHOUT fil-
ters. To determine the approximate blower performance of
the system, apply the filter drop value for the filter bein
g
used
or select an appropriate value from the Table below.
NOTE: The filter pressure drop values in Blower Performanc-
eTables are t
y
pical values for the t
y
pe of filter listed and
should onl
y
be used as a
g
uideline. Actual pressure drop rat-
in
g
s for each filter t
y
pe var
y
between filter manufacturer.
APPLYING FILTER PRESSURE DROP TO
DETERMINE SYSTEM AIRFLOW
To determine the approximate airflow of the unit with a filter in
place, follow the steps below:
1. Select the filter type.
2. Select the number of return air openin
g
s or calculate the
return openin
g
size in square inches to determine the
proper filter pressure drop.
3. Determine the External System Static Pressure (ESP)
without the filter.
4. Select a filter pressure drop from the table based upon
the number of return air openin
g
s or return air openin
g
size and add to the ESP from Step 3 to determine the
total system static.
5. If total system static matches a ESP value in the airflow
table (i.e. 0.20, 0.60, etc,) the system airflow corre-
sponds to the intersection of the ESP column and Model/
Blower Speed row.
6. If the total system static falls between ESP values in the
table (i.e. 0.58, 0.75, etc.), the static pressure may be
rounded to the nearest value in the table determinin
g
the
airflow usin
g
Step 5 or calculate the airflow by usin
g
the
followin
g
example.
Example: For a 120,000 Btuh furnace with 2 return openin
g
s
and operatin
g
on hi
g
h speed blower, it is found that total sys-
tem static is 0.58" w.c. To determine the system airflow, com-
plete the followin
g
steps:
1. Obtain the airflow values at 0.50" & 0.60" ESP.
Airflow @ 0.50": 2130 CFM
Airflow @ 0.60": 2050 CFM
2. Subtract the airflow @ 0.50" from the airflow @ 0.60" to
obtain airflow difference.
2050 - 2130 = -80 CFM
3. Subtract the total system static from 0.50" and divide this
difference by the difference in ESP values in the table,
0.60" - 0.50", to obtain a percenta
g
e.
(0.58 - 0.50) / (0.60 - 0.50) = 0.8
4. Multiply percenta
g
e by airflow difference to obtain airflow
reduction.
(0.8) x (-80) = -64
5. Subract airflow reduction value from airflow @ 0.50" to
obtain actual airflow @ 0.58" ESP.
2130 - 64 = 2066
FILTER PERFORMANCE - PRESSURE DROP INCHES W.C.
Airflow Range
Minimum Opening Size
(in.2)
Filter Type
Disposable Hogs Hair*Pleated
1 Opening 2 Openings 1 Opening 2 Openings 1 Opening 2 Openings 1 Opening 2 Openings
0 - 750 230 0.01 0.01 0.15
751 - 1000 330 0.05 0.05 0.20
1001 - 1250 330 0.10 0.10 0.20
1251 - 1500 330 0.10 0.10 0.25
1501 - 1750 380 658 0.15 0.09 0.14 0.08 0.30 0.17
1751 - 2000 380 658 0.19 0.11 0.18 0.10 0.30 0.17
2001 & Above 463 658 0.19 0.11 0.18 0.10 0.30 0.17
* Hogs Hair Filters are the type supplied with furnace (if supplied).

Luxaire 036-21013-002 Rev. A (5/00)
Unitary Products Group 5
UNIT CLEARANCES TO COMBUSTIBLES (ALL DIMENSIONS IN INCHES)
(All surfaces identified with the unit in an upflow confi
g
uration)
APPLICATION TOP FRONT REAR LEFT
SIDE RIGHT SIDE FLUE FLOOR/ BOTTOM CLOSET ALCOVE ATTIC LINE CONTACT
UPFLOW / HORIZONTAL MODELS P*DU/ G8D-UH / L8D-UH
UPFLOW 1 6 0 0 3 6 COMBUSTIBLE YES YES YES NO
UPFLOW B-VENT 1 3 0 0 0 1 COMBUSTIBLE YES YES YES NO
HORIZONTAL 1 6 0 0 3 6 COMBUSTIBLE NO YES YES YES*
HORIZONTAL B-VENT 1 3 0 0 0 1 COMBUSTIBLE NO YES YES YES*
* Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal postion) of
the furance jacket and building joists, studs or framing.
FILTER SIZE / ADD-ON COOLING
MODEL FILTER SIZE ADD-ON COOLING
SIDE BOTTOM TONS CFM @ .5 ESP*
G8D06012UHA11†16 X 26 14 X 26 1- 1/2, 2, 2-1/2, 3 1330
G8D08012UHA11†16 X 26 14 X 26 1- 1/2, 2, 2-1/2, 3 1330
G8D08016UHB11†16 X 26 16 X 26 3, 3- 1/2, 4 1795
G8D10012UHB11 16 X 26 16 X 26 2, 2- 1/2, 3 1465
G8D10020UHC11†(2) 16 X 26 20 X 26 3- 1/2, 4 ,5 2115
G8D12016UHC11 16 X 26 20 X 26 3, 3- 1/2, 4 1780
G8D12020UHC11†(2) 16 X 26 20 X 26 3- 1/2, 4 ,5 2115
* ESP (External Static Pressure) .5”W.C. is at furnace outlet ahead of cooling coil, and includes filter.
†Includes LoNox models
NOTE: High velocity filters provided.

036-21013-002 Rev. A (5/00) Luxaire
6Unitary Products Group
ACCESSORIES
Propane Conversion Kits –1NP0480
These accessory conversion kits may be used to convert nat-
ural
g
as units for propane (LP) operation. Conversions must
be made by qualified distributor or dealer personnel.
LoNox models cannot be converted to propane (LP) operation.
High Altitude Pressure Switch Kits
These accessory kits may be used to convert units for hi
g
h
altitude operation. Conversion must be made by qualified dis-
tributor or dealer personnel.
NOTES: For hi
g
h altitude conversion, an orifice chan
g
e ma
y
also be required. See Form 650.77-N1.1V for applica-
tion information.
External Side Return Filter Rack - 1SR0302 (Upflow)
Provides a 16 x 26 cleanable, hi
g
h velocity type filter and at-
taches to the furnace side panel and the return air duct. The
filter is easily replaced. Packa
g
e contains six filter racks with
filters.
External Bottom Return Upflow
Or Horizontal End Return Filter Rack
Provides a cleanable, hi
g
h velocity type filter and rack.
Attaches to the end of the furnace and provides duct flan
g
es.
1BR0314 - 14-1/2" "A"cabinet
1BR0317 - 17-1/2" "B" cabinet
1BR0321 - 21" "C" cabinet
FIELD WIRING DIAGRAMS
KIT APPLICATION MODELS
1PS0313 2000 - 10,000 FT
G8D06012UHA11*
* Includes LoNox models.
G8D08012UHA11*
G8D08016UHB11*
G8D10012UHB11
G8D10020UHC11*
1PS0314 2000 - 10,000 FT. G8D12016UHC11
G8D12020UHC11*
SINGLE STAGE THERMOSTAT
TWO STAGE THERMOSTAT
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Luxaire 036-21013-002 Rev. A (5/00)
Unitary Products Group 7
NOTES

Subject to chan
g
e without notice. Printed in U.S.A. CD: 6-21014 036-21013-002 Rev. A (5/00)
Copyri
g
ht © by Unitary Products Group 2000. All ri
g
hts reserved. Supersedes: Form 650.77-TG1U (1199)
Unitary 5005 Norman
Products York OK
Group Drive 73069
NOTES