TECHNICAL GUIDE
AFFINITY
MODELS: PS8*DH
GAS-FIRED
HIGH EFFICIENCY SINGLE STAGE
DOWNFLOW/HORIZONTAL FURNACES
STANDARD & Low NOx
NATURAL GAS
40 - 130 MBH INPUT
EFFICIENCY
RATING
CERTIFIED
279744-YTG-A-0407
DESCRIPTION
These high efficiency, downflow/horizontal compact units
employ induced combustion, reliable hot surface ignition and
high heat transfer tubular heat exchangers.
These furnaces are designed for residential installation in a
closet, attic or garage and are ideal for commerci al applications. All units are factory assembled, wired and tested to
assure safe dependable and economical installation and
operation.
These units are Category I listed and may be common
vented with another gas appliance as allowed by the
National Fuel Gas Code ANSI Z223.1 (latest edition).
WARRANTY
20-year limited warranty on the heat exchanger.
10-year heat exchanger warranty on commercial applica-
tions.
5-year limited parts warranty.
FEATURES
• Downflow/Horizontal models may be easily applied
without any field conversion
• Top vent connection allows installation in narrow locations
• Electronic hot surface ignition with high reliability and
dependability
• 100% shut off main gas valve for added safety
• High quality inducer motor for quiet operation
• Standard terminals for controlling humidifiers & EAC's
• 40 VA control transformer, fuse protected
• Easy to connect power and control wiring
• Efficiency ratings of 80 AFUE attained by using tubular
heat exchangers
• Cooling relay standard for easy installation of add-on
cooling
• Blower off-delay for cooling SEER improvement
• Multi-speed PSC, direct-drive blower motors to match
cooling requirements
• Adjustable fan-off settings to eliminate "cold-blow"
• Compact 40-in height allows installation in small space
confines
• All models are propane convertible
• Low NOx models have been designed to meet specific
code requirements.
• All models are propane convertible.
ISO 9001
Certified Quality
Management System
Due to continuous product improvement, specific ations
are subject to change without notice.
Visit us on the web at www.york.com for the most
up-to-date technical information.
Additional rating information can be found at
www.gamanet.org.
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
279744-YTG-A-0407
B
A
FRONT
20
3/4
40
B
1-7/8
D
FRONT
TOP IMAGE
5
20
T’STAT WIRING
7/8” K.O.
GAS INLET
1-1/4” X 2-1/2”
2-1/2
28-1/2
30-1/8
LEFT SIDE
4” Dia.
3-3/4
(VENT CONNECTION)
1-1/4
BOTTOM IMAGE
20
FRONT
D
31-1/8
A
C
1-1/8
7-3/8
5-3/4
ALT. GAS INLET
1-1/4” X 2-1/2”
RIGHT SIDE
CABINET AND DUCT DIMENSIONS
Models CFM
Cabinet
Size
ABCD
PS8A12(N,L)040DH11 1200 A 14 1/2 13 1/4 12 10 3/8
PS8A12(N,L)060DH11 1200 A 14 1/2 13 1/4 12 10 3/8
PS8A12(N,L)080DH11 1200 A 14 1/2 13 1/4 12 10 3/8
PS8B16(N,L)080DH11 1600 B 17 1/2 16 1/4 15 11 3/4
PS8B12(N,L)100DH11 1200 B 17 1/2 16 1/4 15 11 3/4
PS8C16(N,L)100DH11 1600 C 21 19 3/4 18-1/2 13 1/2
PS8C20(N,L)100DH11 2000 C 21 19 3/4 18-1/2 13 1/2
PS8C16(N,L)115DH11 1600 C 21 19 3/4 18-1/2 13 1/2
PS8C20(N,L)115DH11 2000 C 21 19 3/4 18-1/2 13 1/2
PS8D20(N,L)130DH11 2000 D 24 1/2 23 1/4 22 15 1/4
Cabinet Dimension
2 Unitary Products Group
279744-YTG-A-0407
RATINGS & PHYSICAL / ELECTRICAL DATA
Models
PS8A12(N,L)040DH11 40 32 1200 14-1/2 9.0 80.0 20 - 50
PS8A12(N,L)060DH11 60 48 1200 14-1/2 9.0 80.0 25 - 55
PS8A12(N,L)080DH11 80 64 1200 14-1/2 9.0 80.0 35 - 65
PS8B16(N,L)080DH11 80 64 1600 17-1/2 12.0 80.0 25 - 55
PS8B12(N,L)100DH11 100 80 1200 17-1/2 12.0 80.0 40 - 70
PS8C16(N,L)100DH11 100 80 1600 21 12.0 80.0 25 - 55
PS8C20(N,L)100DH11 100 80 2000 21 14.0 80.0 25 - 55
PS8C16(N,L)115DH11 115 92 1600 21 12.0 80.0 35 - 65
PS8C20(N,L)115DH11 115 92 2000 21 14.0 80.0 30 - 60
PS8D20(N,L)130DH11 130 104 2000 24-1/2 14.0 80.0 40 - 70
Models
PS8A12(N,L)040DH11 40 150 1/3 6.2 10 x 8 20 14 100
PS8A12(N,L)060DH11 60 155 1/3 6.2 10 x 8 20 14 110
PS8A12(N,L)080DH11 80 165 1/3 6.2 10 x 8 20 14 120
PS8B16(N,L)080DH11 80 160 3/4 11.0 11 x 10 20 14 130
PS8B12(N,L)100DH11 100 170 1/2 7.0 10 x 8 20 14 125
PS8C16(N,L)100DH11 100 155 3/4 11.0 11 X 10 20 14 140
PS8C20(N,L)100DH11 100 155 1 12.2 11 x 11 20 12 140
PS8C16(N,L)115DH11 115 165 3/4 11.0 11 x 10 20 14 150
PS8C20(N,L)115DH11 115 160 1 12.2 11 x 11 20 12 150
PS8D20(N,L)130DH11 130 170 1 12.2 11 x 11 20 12 160
Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes.
The furnace shall be installed so that the electrical components are protected from water.
Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures.
Input Output
MBH MBH CFM In. °F
Input
MBH °F Hp Amps In. Lbs.
Max. Outlet
Air Temp
Nominal
Airflow
Blower
Cabinet
Width
Blower
Size
Total Unit
Amps
Max
Over-Current
Protect
AFUE
Min. wire Size
(awg) @ 75 ft
one way
Air Temp.
Operation
Rise
Weight
Unitary Products Group 3
279744-YTG-A-0407
BLOWER PERFORMANCE CFM - (WITHOUT FILTER)
MODELS Speed
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
High 1620 1590 1480 1400 1310 1240 1140 1040 910 760
PS8A12(N,L)040DH11
PS8A12(N,L)060DH11
PS8A12(N,L)080DH11
PS8B16(N,L)080DH11
PS8B12(N,L)100DH11
PS8C16(N,L)100DH11
PS8C20(N,L)100DH11
PS8C16(N,L)115DH11
PS8C20(N,L)115DH11
PS8D20(N,L)130DH11
Medium High 1430 1390 1340 1280 1220 1140 1050 960 820 710
Medium Low 1210 1210 1190 1200 1100 1020 940 850 730 620
Low 980 980 970 950 920 870 810 720 620 520
High 1500 1470 1390 1320 1240 1170 1070 960 830 700
Medium High 1380 1340 1280 1210 1150 1060 970 870 760 610
Medium Low 1220 1200 1160 1110 1050 990 910 820 700 600
Low 960 950 940 920 890 840 770 710 630 530
High 1550 1480 1410 1330 1250 1150 1050 940 810 700
Medium High 1400 1360 1290 1220 1150 1060 970 860 730 590
Medium Low 1230 1210 1170 1120 1060 990 910 810 680 560
Low 980 970 960 930 890 830 760 680 550 450
High 2070 2000 1930 1850 1770 1670 1580 1470 1360 1250
Medium 1650 1630 1610 1560 1490 1420 1360 1270 1170 1040
Low 1410 1400 1370 1340 1320 1270 1210 1140 1050 950
High 1710 1650 1580 1510 1420 1330 1260 1160 1090 930
Medium High 1480 1440 1380 1330 1270 1180 1090 980 790 630
Medium Low 1240 1230 1200 1170 1110 1030 950 850 710 600
Low 980 980 980 970 930 890 800 720 630 530
High 2210 2160 2100 2030 1940 1850 1750 1640 1520 1400
Medium 1640 1640 1620 1590 1530 1500 1430 1360 1270 1160
Low 1410 1410 1370 1360 1300 1260 1210 1150 1090 1010
High 2400 2330 2240 2130 2030 1960 1820 1710 1570 1390
Medium High 2130 2070 2000 1940 1840 1760 1660 1540 1420 1230
Medium Low 1800 1760 1730 1650 1580 1510 1430 1300 1200 1030
Low 1480 1450 1390 1360 1300 1240 1180 1080 960 860
High 2210 2160 2100 2030 1940 1850 1750 1640 1520 1400
Medium 1640 1640 1620 1590 1530 1500 1430 1360 1270 1160
Low 1410 1410 1370 1360 1300 1260 1210 1150 1090 1010
High 2400 2310 2220 2120 2010 1910 1800 1660 1520 1350
Medium High 2090 2030 1970 1880 1790 1730 1640 1520 1370 1190
Medium Low 1720 1690 1650 1600 1 550 1460 1370 1270 1150 980
Low 1440 1430 1400 1340 1280 1220 1140 1040 930 830
High 2530 2420 2340 2250 2110 2020 1920 1750 1590 1410
Medium High 2190 2150 2070 1970 1910 1790 1680 1550 1400 1250
Medium Low 1800 1760 1720 1680 1610 1490 1410 1300 1160 1040
Low 1450 1440 1410 1360 1310 1250 1170 1080 980 860
Airflow Data
Ext. Static Pressure (in. H2O)
NOTES:
1. Airflow expressed in standard cubic feet per minute (CFM).
2. Motor voltage at 115 V.
4 Unitary Products Group
279744-YTG-A-0407
HORIZONTAL SIDEWALL VENTING
For applications where vertical venting is not possible, the
only approved method of horizontal venting is the use of an
auxiliary power vent. Approved power venters are Fields
Controls Model SWG-4Y or the appropriate Tjernlund GPAK
model. Follow all application and installation details provided
by the manufacturer of the power vent. This unit may be horizontally vented using 4” (10.2 cm) diameter pipe with a minimum length of 4.5 feet (1.37 m) and a maximum length of
34.5 feet (10.82 m) with up to 4 elbows.
FILTER PERFORMANCE
The airflow capacity data published in Blower Performance
Tables above, represents blower performance WITHOUT filters. To determine the approximate blower performance of
the system, apply the filter drop value for the filter being used
NOTE: The filter pressure drop values in Blower Performance Tables are typical values for the type of filter listed and
should only be used as a guideline. Actual pressure drop ratings for each filter type vary between filter manufacturer.
RECOMMENDED FILTER SIZES
Cabinet Size Top Return (in)
A (2) 14 x 20
B (2) 14 x 20
C (2) 14 x 20
D (2) 14 x 20
NOTES:
1. Air velocity through throwaway type filters may not exceed 300
feet per minute. All velocities over this require the use of high
velocity filters.
or select an appropriate value from the Table below.
FILTER PERFORMANCE - PRESSURE DROP INCHES W.C. AND (KPA)
Airflow Range
CFM
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 0.15 0.14 0.30
1751 - 2000 380 0.19 0.18 0.30
2001 & Above 463 0.19 0.18 0.30
Minimum
Opening Size
2
in
Disposable Washable Fiber Pleated
In W.C. In W.C. In W.C.
Filter Type
UNIT CLEARANCES TO COMBUSTIBLES
Application
Downflow 160036
Downflow B-Vent130001
Horizontal 160036CombustibleNoYesYes
Horizontal B-Vent 1 3 0 0 0 1 Combustible No Yes Yes
1 Special floor base or air conditioning coil required for use on combustible floor.
2 Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal position) of the furnace-
jacket and building joists, studs or framing.
Top Front Rear
In. In. In. In. In. In.
Left
Side
Right
Side
Flue
Floor/
Bottom
1
1
1
1
Closet Alcove Attic
Yes Yes Yes No
Yes Yes Yes No
Line
Contact
2
Yes
2
Yes
Unitary Products Group 5
279744-YTG-A-0407
For additional connection diagrams for all UPG equipment refer to “Low Voltage System Wiring” document available online at
www.upgnet.com in the Product Catalog Section.
Y
C
SINGLE STAGE
AIR CONDITIONING
24-Volt Common
Single Stage Cool
24V HUMIDIFIER
HEAT PUMP
SINGLE STAGE
Y
C
24-Volt Common
Single Stage Heat/Cool
R
24-Volt Hot
O
W
W1/66
First Stage Heat
First Stage Heat Out
X/L
Malfunction Light
Reversing Valve–Energized in Cool
C
Y/Y2
Y1
24-Volt Common
FURNACE CONTROL
Single/Second Stage Cool
PSC-2 STAGE COOLING READY
Y
RC
Optional w/Batteries
First Stage Cool
Y
C
*BN11C01124
*DP11C40124
*DN11C00124
RC
First Stage Cool
24-Volt Common
R
First Stage Cool
RH
W
24-Volt Hot
Single Stage Heat
W
G
Fan
G
Fan
First Stage Heat
24-Volt Hot (Cool XFMR)
24-Volt Hot (Heat XFMR)
G
W
RH
Fan
First Stage Heat
24-Volt Hot (Cool XFMR)
24-Volt Hot (Heat XFMR)
HM1
Humidistat
on thermostat not necessary
Selection of GAS/ELEC switch
C
READY
FURNACE CONTROL
PSC-2 STAGE COOLING
*PP32H70124
*DP21H40124
*BN21H00124
Y/Y2
24-Volt Common
Y
C
24-Volt Common
*DN21H00124
R
Single/Second Stage Cool
R
First Stage Heat/Cool
Y1
24-Volt Hot
First Stage Cool
W1
24-Volt Hot
Second Stage Heat
W
Single Stage Heat
E
Emergency Heat
G
Fan
G
L
O
Fan
Malfunction Light
Reversing Valve–Energized in Cool
must be set to Pump OFF
must be set to Heat Pump 1
Step 1 of Thermostat User Configuration Menu
Step 9 of Thermostat User Configuration Menu
Y
*BN11C00124 *BP11C50124 *PP11C70224
THERMOSTAT THERMOSTAT THERMOSTAT
C
24-Volt Common
R
RC
First Stage Cool
24-Volt Hot (Cool XFMR)
24-Volt Hot (Heat XFMR)
G
W
Fan
First Stage Heat
*DN22U00124 *BP21H50124
THERMOSTAT THERMOSTAT THERMOSTAT
N/A N/A
System Type - must be set to 0
Thermostat Installer Setup Number 1 -
Thermostat Installer Setup Number 15 -
Compressor Protection - must be set to 5
1 Stage A/C w/Single Stage Furnace, 2 Stage Cooling Ready - PS8/9, (F,L)*8/9S, XYG80-U
W/031-01975- Series Demand Control
HP2 Single Stage H/P - E*RD, E*BD, ERHS, HPX13 - w/Single Stage Furnace, 2 Stage Cooling Ready - PS8/9, (F,L)*8/9S, XYG80-U
AC2
Thermostat Chart
6 Unitary Products Group
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 openings or calculate the
return opening 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 openings or return air opening
size and add to the ESP from Step 3 to determine the
total system static.
5. If total system static matches an ESP value in the airflow
table (i.e. 0.20, 0.60, etc,) the system airflow corresponds 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 determining the
airflow using Step 5 or calculate the airflow by using the
following example.
Example: For a 60,000 Btuh furnace operating on high
speed blower, it is found that total system static is 0.58" w.c.
To determine the system airflow, complete the following
steps:
1. Obtain the airflow values at 0.50" & 0.60" ESP.
Airflow @ 0.50": 1240 CFM
Airflow @ 0.60": 1170 CFM
2. Subtract the airflow @ 0.50" from the airflow @ 0.60" to
obtain airflow difference.
1170 - 1240 = -70 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 percentage.
(0.58 - 0.50) / (0.60 - 0.50) = 0.8
4. Multiply percentage by airflow difference to obtain airflow
reduction.
(0.8)x(-70) = -56
5. Subtract airflow reduction value to airflow @ 0.50" to
obtain actual airflow @ 0.58" ESP.
1240 - 56 = 1184
279744-YTG-A-0407
ACCESSORIES
PROPANE (LP) CONVERSION KIT -
1NP0347 (All Models)
This accessory conversion kit may be used to convert natural
gas units for propane (LP) operation at altitudes up to 8,000
ft. Conversion should be made by qualified distributor or
dealer personnel.
COMBUSTIBLE FLOOR BASE 1CB0314 = For 14-1/4" cabinet models
1CB0317 = For 17-1/2" cabinet models
1CB0321 = For 21" cabinet models
1CB0324 = For 24-1/2" cabinet models
BOTTOM RETURN FILTER -
1BR0114 or 1BR0214 - For 14-1/2” cabinets
1BR0117 or 1BR0217 - For 17-1/2” cabinets
1BR0121 or 1BR0221 - For 21” cabinets
1BR0124 or 1BR0224 - For 24-1/2” cabinets
HIGH ALTITUDE PRESSURE SWITCHES -
For installation where the altitude is less than 8,000 feet it is
not required that the pressure switch be changed. For altitudes above 8,000 feet see kits below. Conversion must be
made by qualified distributor or dealer personnel.
1PS0301 - 040, 060, 080MBH
1PS0311 - 100, 115, 130 MBH
ROOM THERMOSTATS - A wide selection of compatible
thermosets are available to provide optimum performance
and features for any installation.
1H/1C, manual change-over electronic non-programmable
thermostat.
1H/1C, auto/manual changeover, electronic programmable,
deluxe 7-day, thermostat.
1H/1C, auto/manual changeover, electronic programmable.
* For the most current accessory information, refer to the
price book or consult factory.
Unitary Products Group 7
Subject to change without notice. Printed in U.S.A. 279744-YTG-A-0407
Copyright © by York International Corp. 2007. All rights reserved. Supersedes: 246791-YTG-B-0706
Unitary 5005 Norman
Products York OK
Group Drive 73069
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