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INSTALLATION MANUAL
HIGH EFFICIENCY
TUBULAR HEAT EXCHANGER SERIES
MODELS: PT8/ FC8T / FL8T / LC8T / LL8T
(Two Stage Upflow / Horizontal / LoNOx)
57 - 120 MBH INPUT
(16.70 - 35.17 KW) INPUT
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Furnace Base Rectangular Blockoff Panel . . . . . . . . . . . . . . . . . . . . . 5
Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Suspended Furnace / Crawl Space Installation . . . . . . . . . . . . 6
Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Upflow Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Horizontal Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Line Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Field Wiring for Single Stage Thermostat . . . . . . . . . . . . . . . . . . . . . 10
Field Wiring for Two Stage Thermostat . . . . . . . . . . . . . . . . . . . . . . . 10
Accessory Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Vent Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Vent Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Typical Chimney Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Minimum Duct Sizing For Proper Airflow . . . . . . . . . . . . . . . . . . . . . . . 4
Round Duct Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Cabinet and Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Filter Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
High Altitude Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ratings & Physical / Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Roof Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Horizontal Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SECTION I: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
TABLE OF CONTENTS
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
VENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . .16
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
LIST OF FIGURES
Alternate Air Intake, Air Outlet and Chimney Connections . . . . . . . . .12
Typical Sidewall Vent Application . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Typical Sidewall Vent and Termination Configuration . . . . . . . . . . . .12
Home Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
to the Burner Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Air Inlet, Outlet and Chimney Connections . . . . . . . . . . . . . . . . . . . . .14
Air Inlet, Outlet and Chimney Connections . . . . . . . . . . . . . . . . . . . . .14
Alternate Air Intake, Air Outlet and Chimney Connections . . . . . . . . .14
Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . .15
Pressure Switch Tubing Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
LIST OF TABLES
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Unconfined Space Minimum Area in Square Inch . . . . . . . . . . . . . . .15
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Filter Performance - Pressure Drop Inches W.C. and (kPa) . . . . . . . .21
Field Installed Accessories - Non Electrical . . . . . . . . . . . . . . . . . . . .23
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or mainte-
nance can cause injury or property damage. Refer to this manual
for assistance or for additional information, consult a qualified con-
tractor, installer or service agency.
This product must be installed in strict compliance with the installa-
tion instructions and any applicable local, state, and national codes
including, but not limited to building, electrical, and mechanical
codes.
EFFICIENCY
RATING
CERTIFIED
This product was manufactured
in a plant whose quality system
is certified/registered as being
in conformity with ISO 9001.
035-19670-003 Rev. A (1004)
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Table of Contents
Related Manuals for Unitary products group PT8
Summary of Contents for Unitary products group PT8
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Page 1: Table Of Contents
HIGH EFFICIENCY EFFICIENCY RATING TUBULAR HEAT EXCHANGER SERIES CERTIFIED MODELS: PT8/ FC8T / FL8T / LC8T / LL8T (Two Stage Upflow / Horizontal / LoNOx) This product was manufactured in a plant whose quality system is certified/registered as being 57 - 120 MBH INPUT in conformity with ISO 9001. -
Page 2: Safety
• Provide clearances for servicing ensuring that service access is system termination must be located external to the building and in an allowed for both the burners and blower. area where there will be no exposure to the substances listed above. Unitary Products Group... -
Page 3: Ductwork
Protection Association) as outlined in NFPA pamphlets 90A and tioned space. 90B (latest editions) or applicable national, provincial, or state, and local fire and safety codes. Unitary Products Group... -
Page 4: Minimum Duct Sizing For Proper Airflow
76.8 sq.in. of round duct. The total square inch of duct ings before the filter box or air cleaner. attached to the furnace plenum is 300.8 square inch. This exceeds the recommended 280 square inch of duct. Unitary Products Group... -
Page 5: Dimensions
Refer to Figure 2 “Bottom Image Return End”. Be sure to seal the furnace to plenum connections to prevent air leakage. Refer to Figure 1 for unit and plenum dimensions. Unitary Products Group... -
Page 6: Filters
Refer to Table 5 for the recommended filter size. Unitary Products Group... -
Page 7: Gas Piping
Refer to Figures 9 or the gas valve, resulting in a fire or explosion or cause damage to the furnace or some of its components that will result in property damage and loss of life. Unitary Products Group... -
Page 8: Upflow Gas Piping
Do not attempt to drill out any orifices to obtain the proper orifice size. Drilling out a gas orifice will cause misalignment of the burner flames, causing premature heat exchanger burnout, high levels of carbon monoxide, excessive sooting, a fire hazard, personal injury, property damage and/or death. Unitary Products Group... -
Page 9: Electrical Wiring
If air conditioning equipment is installed, use thermostat wiring to con- nect the Y and C terminals on the integrated control board to the yellow and brown wires on the condensing unit (unit out side) as shown in Fig- ure 13 or 14. Unitary Products Group... -
Page 10: Line Wiring Connections
These furnaces are not to be twinned. If more than one furnace is needed in an application, each furnace must have its own completed duct system and its own wall thermostat. FIGURE 12: Field Wiring for Two Stage Thermostat Unitary Products Group... -
Page 11: Vent Termination
3.25 0.99 FIGURE 16: Typical Chimney Connections Over 11/12 to 12/12 1.22 Over 12/12 to 14/12 1.52 Over 14/12 to 16/12 1.83 Over 16/12 to 18/12 2.13 Over 18/12 to 20/12 2.27 Over 20/12 to 21/12 2.44 Unitary Products Group... -
Page 12: Horizontal Venting
80/53 (23.4/15.5) 1200 33.98 10.16 1.37 34.5 10.82 100/65 (29.3/19.1) 80/53 (23.4/15.5) 2000 56.63 10.16 1.37 34.5 10.82 120/78 (35.1/22.9) 96/64 (28.1/18.8) 1600 45.31 10.16 1.37 34.5 10.82 120/78 (35.1/22.9) 96/64 (28.1/18.8) 2000 56.63 10.16 1.37 34.5 10.82 Unitary Products Group... -
Page 13: Home Layout
Termination should be located where it will not be affected by wind gusts, light snow, airborne leaves or allow recirculation of flue An appliance equipped with an integral mechanical means to either gases. draw or force products of combustion through the combustion chamber and/or heat exchanger. Unitary Products Group... -
Page 14: Combustion Airflow Path Through The Furnace Casing To The Burner Box
AIR INLET OUTLET VENTILATION LOUVERS FOR UNHEATED CRAWL SPACE FIGURE 24: Alternate Air Intake, Air Outlet and Chimney Connections INLET AIR DUCT [ends 1 ft (30 cm) above floor] FIGURE 22: Air Inlet, Outlet and Chimney Connections Unitary Products Group... -
Page 15: Outside And Ambient Combustion Air
This procedure is designed to detect an inadequate ventilation system Propane Installation Codes, the local building codes, furnace and vent that can cause the appliances in the area to operate improperly causing manufacture's instructions. unsafe levels of Carbon Monoxide or an unsafe condition to occur. Unitary Products Group... -
Page 16: Safety Controls
Be sure proper ventilation is available to dilute and carry lowing conditions are present. Refer to Figure 28 for tubing connec- away any vented gas. tions. Blockage of vent piping or terminal. Unitary Products Group... - Page 17 • 12” (30 cm) length x 1/8” (0.3 cm) diameter tubing Calculate the furnace input by using one of the following equa- • 2 – pieces of 4” (10 cm) length x 1/8” (0.3 cm) diameter tubing tions. • 1 - 5/16” (0.8 cm) tee Unitary Products Group...
- Page 18 For altitudes above 2,000 ft. (610 m) the furnace input MUST BE DERATED. Refer to the GAS CONVERSION FOR PROPANE (LP) AND HIGH ALTITUDES IN SECTION IV for information on high altitude conversions. Unitary Products Group...
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Page 19: Gas Valve
10. Turn the electrical and gas supplies back on, and with the burners in operation, check for gas leakage around the gas valve pressure port for leakage using an approved non-corrosive gas leak detec- tion fluid, or other non-flammable leak detection methods. Unitary Products Group... -
Page 20: Reading Gas Pressure
Monoxide, a fire hazard, personal injury, property damage, and/or death. The temperature rise, or temperature difference between the return air and the heated supply air from the furnace, must be within the range shown on the furnace rating plate and within the application limitations Unitary Products Group... -
Page 21: Filter Performance - Pressure Drop Inches W.c. And (Kpa)
Step 5 or calculate the airflow by using the following example. Example: For a 130,000 BTUH (38.06 kW) furnace with 2 return open- Unitary Products Group... -
Page 22: Blower Performance Cfm - Upflow (Without Filter) - Bottom Return
1. Airflow expressed in standard cubic feet per minute (CFM) and in cubic meters per minute (m /min). 2. Motor voltage at 115 V. * Input / CFM / Cabinet Width (A=14-1/2, B=17-1/2, C=21, D=24-1/2) † Indicates model available in LoNOx. Unitary Products Group... -
Page 23: Blower Performance Cfm - Upflow (Without Filter) - Left Side Return 23 Field Installed Accessories - Non Electrical
HIGH ALTITUDE PRESSURE SWITCH KIT 1PS0314 INFORMATION SEE FORM (DOES NOT INCLUDE ORIFICES) 650.78-N1.1V 1CB0314 ALL 14-1/2” (“A”) CABINETS 1CB0317 ALL 17-1/2” (“B”) CABINETS COMBUSTIBLE FLOOR BASE FOR DOWNFLOW UNITS 1CB0321 ALL 21” (“C”) CABINETS 1CB0324 ALL 24-1/2”” (“D”) CABINETS Unitary Products Group... -
Page 24: Wiring Diagram
SECTION IX: WIRING DIAGRAM FIGURE 30: Wiring Diagram Subject to change without notice. Printed in U.S.A. 035-19670-003 Rev. A (1004) Copyright © by York International Corp. 2004. All rights reserved. Supersedes: 035-19670-002 Rev. A (0704) Unitary 5005 Norman Product York Group Drive 73069...
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