Thermo Pride Thermo Pace Downflow/Horizontal Furnace Installer's Information Manual
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Thermo Pride Thermo Pace Downflow/Horizontal Furnace Installer's Information Manual

Thermo Pride Thermo Pace Downflow/Horizontal Furnace Installer's Information Manual

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HIGH-EFFICIENCY DOWNFLOW / HORIZONTAL FURNACE
INSTALLER'S INFORMATION MANUAL
ATTENTION, INSTALLER!
furnace, show the user how to turn off gas and electricity to
the furnace. Point out control and switch locations for
turning off gas and electricity.
Information Manual and Section 23, "Maintaining Furnace
In Good Working Order" in this manual with the user. Make
sure the user understands the importance of following all
safety precautions, including what could happen if they do
not.
Attach the following documents to or adjacent to the
furnace. Tell the user where these documents are located.
•
User's Information Manual
•
Installer's Information Manual
•
Parts List
•
Warranty Information
While these instructions have been written as accurately
and thoroughly as possible, they can not cover every
system
variation
or
contingency.
interpretation may arise. For more information, solutions to
particular problems or clarification, contact your local
distributor or the manufacturer.
DOWNFLOW POSITION SHOWN
After installing the
Go over the User's
Questions
ATTENTION, USER!
give you the documents l i sted on opposite side. You
should immediately read the User's Information Manual for
important safety information to keep you and your family
safe. Keep these as long as you keep your furnace. Pass
them on to future furnace purchasers or users. If any of the
documents are missing or illegible, contact your installer or
furnace manufacturer for replacement. Throughout this
manual, when we use the word "you" we refer to the
qualified service technician who is responsible for
application, installation and service of your furnace.
? ? Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
? ? WHAT TO DO IF YOU SMELL GAS
•
Do not try to light any appliance.
•
Do not touch any electrical switch.
•
Do not use any phone in your building.
•
Immediately call your gas supplier from a neighbor's
of
phone. Follow the gas supplier's instructions.
•
If you cannot reach gas supplier, call the fire
department.
Your furnace installer should
431570 G

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Summary of Contents for Thermo Pride Thermo Pace Downflow/Horizontal Furnace

  • Page 1 HIGH-EFFICIENCY DOWNFLOW / HORIZONTAL FURNACE INSTALLER'S INFORMATION MANUAL DOWNFLOW POSITION SHOWN ATTENTION, INSTALLER! ATTENTION, USER! After installing the Your furnace installer should furnace, show the user how to turn off gas and electricity to give you the documents l i sted on opposite side. You the furnace.

  • Page 2: Table Of Contents

    WARNING: Individuals who install this furnace, must have the training and experience necessary to install gas furnaces. They must also have training and experience necessary to install related comfort air conditioning appliances. Improper installation could create a hazard, resulting in the possibility of damage, injury or death. TABLE OF CONTENTS SECTION 1.

  • Page 3: Section 2. Meeting Codes

    Rule 7. Never test for gas leaks with an open flame. Use a subject to continuous higher or lower temperatures. commercial soap solution made specifically for leak Continuous operation outside of this range may shorten detection to check all connections. furnace life.
  • Page 4 Figure 4. Level furnace or tilt toward front no more than 1/4 inch. CAUTION: Furnace must be installed level. F ailure to properly level furnace may result in heat exchanger Figure 2. Level furnace or tilt toward front no more than 1/4 damage.
  • Page 5 MOTOR FURNACE RETURN- SUPPLY- CLEARANCE TO COMBUSTIBLES VENT INPUT* SIZE* WIDTH** AIR SIZE** AIR SIZE** (Inches) SIZE (Btu/hr) (HP) “A” “B” “C” SIDES FRONT*** VENT Inches Downflow Horizontal BACK Downflow Horizontal 54,000 17 1/2 15 15/16” 15 3/4” 72,000 17 1/2 15 15/16”...

  • Page 6: Section 4. Providing Venting And Combustion Air

    ATTIC INSTALLATION Line contact is permissible for furnaces installed in horizontal positions. The intersection of furnace top and sides forms a line as shown in Figure 6. This line may be in contact with combustible material. Figure 7. Suspending Using Threaded Rod. SECTION 4.
  • Page 7 IN THE UNITED STATES: Install vent pipe without dips or sags that may hold water. Support horizontal portions of vent pipe every 5 Allow a minimum clearance of 4 feet from electric feet (3 feet for SDR-21 or SDR-26 pipe). meters, gas meters, regulators, and relief equipment.
  • Page 8 Follow the lighting instructions. Place the appliance Cement 2” PVC pipe, 2” PVC elbow, and flue outlet being inspected in operation. Adjust thermostat so together as shown in Figure 8. Position flue outlet appliance shall operate continuously; such that street ell will be directly below vent elbow. Test for drafthood equipped appliance spillage at the drafthood relief opening after 5 minutes of main burner operation.
  • Page 9 Left Vent Top Vent Right Vent Downflow Position Top Vent Right Vent Horizontal Air-Left Position Top Vent Left Vent Horizontal Air-Right Position Figure 9. Venting Options. Dashed lines show optional combustion a ir pipes for direct venting. Installer’s Information Manual Page 9...
  • Page 10 11. Complete installation of venting system with field VENTING INSTRUCTIONS: HORIZONTAL supplied parts. AIR-LEFT 12. Support vent pipe at furnace. Do not allow draft inducer and rubber coupling to support the weight of Select venting option from Figure 9 that fits your the vent pipe.
  • Page 11 Move rubber cap from inducer-pan port D (located in Note that some of the larger furnace models may require a lower left-hand corner) to inducer-pan port A (located in high altitude pressure switch at elevations between 3000 top left corner). and 6000 feet.
  • Page 12 Table 1. Maximum Pipe Length--Direct Vent ALLOWABLE PIPE LENGTH (feet of each pipe) ALTITUDE FURNACE PIPE NUMBER OF SWEEP ELBOWS (each pipe) (SEE NOTE 1) INPUT DIA. 54,000 2" 72,000 2" 72,000 3" 0'-1000' 90,000 2" 90,000 3" 108,000 3" 126,000 3"...
  • Page 13 Note: When venting with 3-inch pipe, a 3” X 2” reducer must DIRECT-VENT TERMINATION be used. Locate reducer as close as possible to You may terminate vent and combustion air pipes either combustion-air inlet. You may use up to 20” of 2-inch pipe. vertically (through the roof) or horizontally (through a sidewall).
  • Page 14 Table 2. Maximum Pipe Length--Non-Direct Vent ALLOWABLE PIPE LENGTH (feet) ALTITUDE FURNACE PIPE NUMBER OF SWEEP ELBOWS (SEE NOTE 1) INPUT DIA. 54,000 2" 72,000 2" 72,000 3" 0'-1000' 90,000 2" 90,000 3" 108,000 3" 126,000 3" 54,000 2" 72,000 2"...
  • Page 15 there must be a positive seal between fu rnace and return- NON-DIRECT VENT TERMINATION air duct to avoid pulling air from furnace room. You may terminate vent pipe either vertically (through the Provide for adequate combustion and ventilation air in roof) or horizontally (through a sidewall).
  • Page 16 of all appliances installed in the space. For example: a A 54,000 Btu/hr furnace and a 40,000 Btu/hr water 100,000 Btu/hr furnace and a 40,000 Btu/hr water heater would require the minimum free area openings heater would require a volume of at least 140,000 X 50 of 100 square inches.

  • Page 17: Section 5. Condensate Drain

    For example: A 108,000 Btu per hour furnace requires two Figure 20 and Table 4. openings of at least 108,000 ÷ 4,000 or 27 square inches. See Figure 18 and Table 3. Table 4. Free Opening Area Based On One Square Inch Per 2000 Btu/hr.
  • Page 18 From parts package find the following parts: DRAIN TRAP INSTRUCTIONS-- condensate drain trap, 8 1/2” section of 13/16” OD DOWNFLOW POSITION drain hose, and two small hose clamps. Select drain location option from Figure 21 that best fits From underside of casing, insert drain trap through your installation.

  • Page 19: Section 6. Installing Gas Piping

    Plan furnace gas supply piping so it will not interfere with removal of burner assembly, front door or blower door for servicing. Make sure gas piping is large enough for all appliances connected to it to operate at once without lowering gas supply pressure.

  • Page 20: Section 7. Installing Electrical Wiring

    The furnace and its gas control must be disconnected from gas supply piping system at ground joint union during any pressure testing of the system at test pressures greater than 1/2 psi (14 inches W.C.). The furnace must be isolated from gas supply piping system by turning off equipment shut-off valve during any pressure testing of the system at test pressures equal to or less than 1/2 psi (14 inches W.C.).

  • Page 21: Section 8. Sequence Of Operation

    CONTINUOUS LOW-SPEED FAN OPTION SECTION 8. SEQUENCE OF OPERATION Some models are equipped with a fan timer that allows continuous low-speed fan as an option. When available, this option can be used to operate the blower on low speed HEATING MODE anytime the blower is not otherwise running on heating or cooling speed.
  • Page 22 Figure 26. Furnace Wiring Diagram. Page 22 Installer’s Information Manual...

  • Page 23: Section 9. Installing Duct System

    Note: A combustible floor base, available from the manufacturer, is required for downflow furnace installation SECTION 9. INSTALLING DUCT on wood flooring. SYSTEM On furnaces not equipped with a cooling coil, a removable access panel that is large enough to allow viewing of the Properly size duct system based on heat-loss and heat-gain heat exchanger should be provided in the supply duct.

  • Page 24: Section 10. Selecting And Installing Filters

    See Table 6 for minimum recommended filter size for field DUCT DAMPERS fabricated filter cabinets or return-air filter grille. You may balance airflow with dampers installed in each branch run duct and adjust for even temperature throughout the heated space. For proper furnace operation, make sure Table 6.

  • Page 25: Section 12. Gas Supply Pressure And Pilot Adjustment

    Pilot flame should cover 1/2 inch of tip of flame sensor SECTION 12. GAS SUPPLY as shown in Figure 29. PRESSURE AND PILOT If you need to adjust pilot flame, remove pilot- ADJUSTMENT adjustment cover screw on gas control. Save cover screw for re-installation.

  • Page 26: Section 14. Checking Gas Input Rate

    Attach manometer to 1/8" NPT manual shut-off valve Gas supply pressure must be between 5 and 7 inches just installed. W.C. for natural gas. See Section 12, "Gas Supply Pressure and Pilot Adjustment." Slowly open equipment shut-off valve in gas supply line just ahead of furnace.

  • Page 27: Section 15. Derating For High Altitude

    PROPANE (LP) GAS INPUT RATE WARNING: Do not set Propane (LP) manifold pressure at 11.0 inches W.C. It could cause heat exchanger failure. WARNING: Propane (LP) gas installations do not have gas meters to double-check input rate. Measure manifold pressure adjustment with an accurate manometer. SECTION 15.

  • Page 28: Section 17. Changing Main Burner Orifices

    Table 8. Propane (LP) Gas Orifice Size. (Millimeters) ELEVATION 2001 3001 4001 5001 6001* 7001* 8001* 9001* HEATING* VALUE 2000 3000 4000 5000 6000 7000 8000 9000 10000 (Btu/cu. ft.) Feet Feet Feet Feet Feet Feet Feet Feet Feet 2500-2550 1.20 1.15 1.15...

  • Page 29: Section 19. Measuring Duct System Static Pressure

    SECTION 19. MEASURING DUCT SYSTEM STATIC PRESSURE You will need a 0 to 1 inch W.C. slope gauge with 0.01-inch resolution and two pressure measurement taps to measure duct system static pressure. System airflow can be determined from Specification Sheet when duct system static pressure is known.

  • Page 30: Section 20. Measuring Air Temperature Rise

    11. Remove jumper wire from 24-volt terminal strip. After making adjustments, you must check air Remove pressure taps and seal holes in ductwork. temperature rise to verify that resulting air temperature rise is within allowable range. If air temperature rise is still outside temperature rise SECTION 20.

  • Page 31: Section 22. Setting Blower Timings

    Condensate drain system must be clear and free SECTION 22. SETTING BLOWER including all inte rnal and external hoses and TIMINGS condensate trap. Check for signs of condensate leakage. Heating blower on-delay is fixed at 30 seconds from when Furnace-room or closet combustion and ventilation air main valve opens.

  • Page 32: Section 24. Accessories

    Locate five blower motor wires that feed through casing panel in plenum. Includes two 16” x 20” x 1” high-velocity, hem. washable filters. FILTERS: High-velocity washable filters, available in Label blower motor wires for proper replacement. cartons of 10. Disconnect blower motor wires from Fan Timer. See RUBBER COUPLINGS AND CLAMPS: May be installed in Figure 32.

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