Thermo Pride Thermo Pace Downflow User Manual

HIGH-EFFICIENCY DOWNFLOW / HORIZONTAL FURNACE

INSTALLER'S INFORMATION MANUAL

DOWNFLOW POSITION SHOWN

ATTENTION, INSTALLER! After installing the

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. Go over the User’s Information Manual and Section 23, “Maintaining Fu rnace 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. Questions of interpretation may arise. For more information, solutions to particular problems or clarification, contact your local distributor or the manufacturer.

ATTENTION, USER! Your furnace installer should

give you the documents listed 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 phone. Follow the gas supplier's instructions.

• If you cannot reach gas supplier, call the fire department.

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WARNING: Individuals who install this fu rnace, 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. IMPORTANT SAFETY RULES ............................................................................................................. 2

SECTION 2. MEETING CODES .............................................................................................................................. 3

SECTION 3. DETERMINING BEST FURNACE LOCATION...................................................................................... 3

SECTION 4. PROVIDING VENTING AND COMBUSTION AIR.................................................................................. 6

SECTION 5. CONDENSATE DRAIN.......................................................................................................................17

SECTION 6. INSTALLIN G GAS PIPING ..................................................................................................................19

SECTION 7. INSTALLIN G ELECTRICAL WIRING...................................................................................................20

SECTION 8. SEQUENCE OF OPERATION ............................................................................................................21

SECTION 9. INSTALLIN G DUCT SYSTEM.............................................................................................................23

SECTION 10. SELECTIN G AND INSTALLING FILTERS ........................................................................................24

SECTION 11. CHECKS BEFORE STARTING FURNACE ........................................................................................24

SECTION 12. GAS SUPPLY PRESSURE AND PILOT ADJUSTMENT .....................................................................25

SECTION 13. MANIFOLD PRESSURE ADJUSTMENT...........................................................................................25

SECTION 14. CHECKING GAS INPUT RATE .........................................................................................................26

SECTION 15. DERATING FOR HIGH ALTITUDE ....................................................................................................27

SECTION 16. DETERMINING CORRECT ORIFICE SIZE ........................................................................................27

SECTION 17. CHANGING MAIN BURNER ORIFICE S ............................................................................................28

SECTION 18. ADJUSTIN G BLOWER SPEED.........................................................................................................28

SECTION 19. MEASURING DUCT SYSTEM STATIC PRESSURE ..........................................................................29

SECTION 20. MEASURING AIR TEMPERATURE RISE ..........................................................................................30

SECTION 21. CHECKING CONTROLS ..................................................................................................................30

SECTION 22. SETTING BLOWER TIMINGS ...........................................................................................................31

SECTION 23. MAINTAINING FURNACE IN GOOD WORKING ORDER ...................................................................31

SECTION 24. ACCESSORIES .............................................................................................................................32

SECTION 25. OTHER INFORMATION AND PUBLICATIONS ..................................................................................32

SECTION 1. IMPORTANT SAFETY RULES

To alert you to potential hazards, we use the signal words "WARNING" and "CAUTION" throughout this manual. "WARNING" alerts you to situations that could cause or result in serious injury or death. "CAUTION" alerts you to situations that could cause or result in minor or moderate injury or property damage. For a safe and reliable installation be sure to read and follow all warnings and cautions.

We also use the words "must" and "should" in this manual. "Must" is mandatory. "Should" is advisory.

WARNING: Read and follow the safety rules in this section and throughout this manual. Failure to do so could cause improper furnace operation, resulting in

damage, injury or death.

Rule 1. Use only gas approved for use in this fu rnace, as indicated on fu rnace rating plate. Use only natural gas in furnaces designed for natural gas. Use only propane (LP) gas in furnaces designed for propane (LP) gas. Make sure furnace will operate properly on the gas type available to user. Do not use butane gas in this furnace.

WARNING: Use of a non-approved gas (such as butane) in this furnace could cause sooting or overheating

of heat exchanger.

Rule 2. Do not install this furnace outdoors or in a mobile home, trailer or recreational vehicle. It is not design certified for these installations. This furnace is suitable for a home built on site or a manufactured home completed at the final site.

Rule 3. Air for combustion must not come from a corrosive or contaminated atmosphere. Make sure all combustion and ventilation air requirements are adhered to in addition to local codes and ordinances.

Rule 4. This furnace is not to be used for temporary heating of buildings or structures under construction.

Rule 5. Provide adequate combustion and ventilation air to space where furnace is being installed unless combustion air is provided directly through an inlet air pipe. Connect this furnace to an approved vent system--venting combustion products outdoors.

Rule 6. Check for gas leaks anytime work is done on gas supply line, fu rnace gas control, pilot and pilot line or main

burner manifold.

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Rule 7. Never test for gas leaks with an open flame. Use a

commercial soap solution made specifically for leak detection to check all connections.

Rule 8. Completely seal supply and return air ducts to furnace casing. Duct system must run to an area outside furnace room or closet. Seal duct work wherever it runs through walls, ceilings or floors of furnace room or closet.

subject to continuous higher or lower temperatures. Continuous operation outside of this range may shorten furnace life.

WARNING : Do not install furnace on its back or front. Doing so could cause heat exchanger blockage and

damage to heat exchanger.

SECTION 2. MEETING CODES

This furnace complies with American National Standard and National Standard of Canada for Gas Fired Central Furnaces, ANSI Z21.47 ? CAN/CGA-2.3. It is certified for operation with either natural gas or propane (LP) gas for indoor installation in a building constructed on site. It meets the requirement for a 100% shut -off gas control system.

Before installing this furnace, make sure you know all applicable codes. Be sure to consult local authorities having jurisdiction over furnaces for information on electrical wiring, gas piping and venting. The installation of this furnace must conform with local building codes or in the absence of local codes, with ANSI Z223.1, National Fuel Gas Code or CAN/CGA B149, Canadian Installation Codes.

Electrical wiring must conform with local building codes or in the absence of local codes, with the current National Electrical Code, ANSI/NFPA 70 or current Canadian

Electrical Code, CSA C22.1.

SECTION 3. DETERMINING BEST FURNACE LOCATION

You may install this fu rnace in the downflow position in an alcove, attic, basement, closet, garage or utility room. See Figure 1.

Select a location that meets all requirements described in this manual for the following:

?? Safety ?? Minimum Clearances ?? Combustion and Ventilation Air ?? Venting ?? Duct System ?? Gas Piping ?? Electrical Wiring

Locate furnace as near to the center of the air distribution system as possible.

Provide ample space for servicing and cleaning. Location must allow 30 inches minimum front clearance for service.

WARNING : Some insulating materials are combustible. When a furnace is installed in an attic or other insulated space, keep all insulating materials at least 12 inches away from furnace and combustion air inlet. Failure

to do so could cause a fire.

You may install fu rnace on non-combustible flooring or for horizontal installations on wood flooring. You may also install furnace on wood flooring in the downflow position when using a combustible floor base, available from the manufacturer. See parts list.

You may install this furnace in the horizontal air-left or horizontal air-right position in an alcove, attic, basement, garage or utility room. See Figure 1.

WARNING: Do not install fu rnace on carpeting, tile or other combustible material except wood flooring. Doing so could cause a fire.

Install fu rnace so all electrical components are protected from water.

LEVELING FURNACE

Furnace must be installed level for proper condensate drainage.

Figure 1. Furnace Installation Positions. CAUTION: Do not install furnace in an area subject to

freezing temperatures. Doing so could cause condensate to freeze.

This furnace operates best when return-air temperature is between 55°F and 80°F. Do not install furnace in a location

Installer’s Information Manual Page 3

In DOWNFLOW POSITION, furnace must be level or tilted to the front no more than 1/4 inch. Furnace must also be

level from side to side within 1/4 inch. See Figure 2.

Figure 4. Level furnace or tilt toward front no more than 1/4 inch.

Figure 2. Level furnace or tilt toward front no more than 1/4 inch. Also, level from side to side within 1/4 inch.

In HORIZONTAL POSITIONS, furnace must be level or tilted to the front no more than 1/4 inch and must also be level from side to side or tilted toward burner end no more than 1/4 inch. See Figures 3 and 4.

CAUTION: Furnace must be installed level. Failure to properly level furnace may result in heat exchanger damage.

OTHER LOCATION INFORMATION

Sufficient air must be provided to ensure there will not be a negative pressure in fu rnace room or space. In addition, there must be a positive seal between furnace and return air duct to avoid pulling air from furnace room.

When a cooling unit is installed with this furnace, the furnace must be installed parallel with or on the upstream side of the cooling unit to avoid condensation in fu rnace heat exchanger. With a parallel flow arrangement, the dampers or other means used to control flow of air must be adequate to prevent chilled air from entering the fu rnace and, if manually operated, must be provided with a means to prevent operation of either unit unless damper is in the full heat or cool position.

When furnace is in a residential garage, it must be installed so that pilot and main burners are located no less than 18 inches above the floor. Also, fu rnace should be protected from physical damage by vehicles.

When fu rnace is in a public garage, airplane hanger, or other building having hazardous atmosphere, install unit in accordance with recommended good practice requirements of the National Fire Protection Association, Inc. Consult local code authorities for additional location requirements.

See Figure 5 for furnace dimensions and clearances.

Figure 3. Level furnace or tilt toward burner end no more than 1/4 inch.

Page 4 Installer’s Information Manual

GAS

INPUT*

(Btu/hr) (HP) “A” “B” “C” TOP SIDES FRONT*** VENT Inches

54,000 1/3 17 1/2 15 15/16” 15 3/4” 0 1 0 1 18 0 2 72,000 1/2 17 1/2 15 15/16” 15 3/4” 0 1 0 1 18 0 2 OR 3 72,000 3/4 20 1/2 18 15/16” 18 3/4” 0 1 0 1 18 0 2 OR 3 90,000 1/2 17 1/2 15 15/16” 15 3/4” 0 1 0 1 18 0 2 OR 3

90,000 3/4 20 1/2 18 15/16” 18 3/4” 0 1 0 1 18 0 2 OR 3 108,000 3/4 23 1/2 21 15/16” 21 3/4” 0 1 0 1 18 0 3 126,000 3/4 23 1/2 21 15/16” 21 3/4” 0 1 0 1 18 0 3

* See Furnace Rating Plate. ** These are furnace dimensions. See Sections 9 and 10 for proper ductwork and floor opening dimensions. *** 30-inch front clearance required for service.

MOTOR

SIZE*

FURNACE

WIDTH**

RETURN-

AIR SIZE**

SUPPLY -

AIR SIZE**

Downflow

CLEARANCE TO COMBUSTIBLES

Horizontal

(Inches)

and

BACK Downflow

Horizontal

VENT

SIZE

Figure 5. Furnace Dimensions and Clearances.

Installer’s Information Manual Page 5

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 6. Typical Attic Installation. Install a platform under furnace that extends a minimum 30

inches in front of furnace. This provides a work area and keeps insulating materials away from combustion air openings. Secure platform to joists.

Note: In horizontal position, condens ate trap hangs as low as 5 inches below furnace. Provisions must be made for condensate trap and drain lines. See Section 5 for details on condensate trap installation.

openings. Failure to do so could cause fire.

Figure 7. Suspending Using Threaded Rod.

SECTION 4. PROVIDING VENTING AND COMBUSTION AIR

This furnace must be connected to a plastic venting system adequate to remove flue gases to the outside atmosphere. It must be vented in accordance with these instructions and local building codes.

The fu rnaces covered by this manual are design-certified as Category IV appliances. Category IV appliances operate with a positive vent static pressure and with a flue-gas temperature that will produce significant condensate in the vent. The vent system for this furnace must be installed so as to prevent leakage of flue gases into the building. This furnace may be installed using either direct venting or nondirect venting.

WARNING : Do not connect this furnace to a vent system shared by any other appliance. Do not connect it to any other type of vent system other than described by these instructions. Improper venting could allow combustion products to collect in building during use resulting in nausea or death by asphyxiation.

CRAWL SPACE INSTALLATION

Furnace can be hung from floor joists or installed on suitable blocks or pad. Pad or blocks must provide enough height to eliminate potential for water damage. Maintain clearances listed in Figure 5.

SUSPENDING FURNACE

Some installations require that the furnace be suspended from rafters or floor joists. A common way to do this using threaded rods is shown in Figure 7. Consider this means when people may walk underneath furnace. Other means that provide adequate support may be used.

Level furnace from front to back and from left to right and maintain clearances as described previously.

Page 6 Installer’s Information Manual

GENERAL VENTING GUIDELINES

?? Vent system and combustion air supply components

must be constructed of schedule 40 PVC, PVC -DWV, SDR26, SDR21 or ABS plastic. Use pipe, fittings, sealants, and installation procedures that conform to the following ANSI/ASTM standards:

PVC ASTM D-1785 SDR26, SDR21 ASTM D-2241 PVC-DWV ASTM D-2665 PVC-DWV CELLULAR CORE ASTM F-891 PVC Primer And Solvent Cement ASTM D-2564 ABS Pipe And Fittings ASTM D-2235 Procedure For Cementing Joints ASTM D-2855

?? All condensate formed in the vent must run back

toward fu rnace for proper drainage. Install vent pipe with no less than a 1/4 inch per foot slope toward furnace from vent terminal.

?? Install vent pipe without dips or sags that may hold

water. Support horizontal portions of vent pipe every 5 feet (3 feet for SDR-21 or SDR-26 pipe).

?? Protect vent from freezing. Long runs of vent pipe

installed in an unconditioned space may require insulati on to prevent freezing of condensate.

PVC PIPE INSTALLATION INSTRUCTIONS

1. Cut ends of pipe square using a miter box or PVC tubing cutter. Remove any burrs, dirt, grease, and

moisture. Check joint for proper fit.

2. Freely coat outside end of pipe and inside of fitting socket with cleaner-primer. The purpose of the primer is to dissolve and penetrate the surface of the pipe. Several coats may be necessary to do this.

3. While primer is still wet, apply a heavy coat of solvent cement to outside of pipe. Next, apply a generous coat of cement to the inside of socket.

4. While both surfaces are still wet with cement, insert pipe into fitting socket until it bottoms out, using a slight twisting motion (1/4 turn). Hold pipe in socket 30

seconds to allow cement to set.

5. Allow joint to cure before handling.

IN THE UNITED STATES:

?? Allow a minimum clearance of 4 feet from electric

meters, gas meters, regulators, and relief equipment.

?? When non-direct venting, terminal must be at least 4

feet below, or 4 feet horizontally from or one foot above any door, window or gravity air inlet into a building. Terminal must also be at least 3 feet above any forcedair inlet located within 10 feet horizontally.

?? When direct venting, vent terminal must be at least one

foot from any opening through which flue gases could enter a building.

IN CANADA:

?? Allow 6 feet clearance to any mechanical air supply or

service regulator vent and 6 feet horizontally to any gas meter, electric meter, or relief device.

?? Do not terminate above a meter/regulator assembly

within 3 feet horizontally of the vertical center line of the regulator

?? Do not terminate within one foot (3 feet for 108,000 and

126,000 Btu models) of a window or door which can be opened, a non-mechanical-air-supply inlet, or the

combustion-air inlet of any other appliance

Caution: Keep solvent cement container sealed when not in use. Do not use solvent cement that has thickened or is gel-like.

WARNING : PVC cements are highly flammable. Do not use near open flames. A fire or explosion could result. Avoid prolonged breathing or contact with skin or

eyes.

TERMINATION LOCATION AND CLEARANCES

Vent pipe and combustion-air-supply pipe (when direct vented) may terminate through a roof or through a sidewall. Roof termination has the advantages of better pipe protection and fewer condensate -damage concerns. Use the following guidelines when choosing a vent location:

?? Flue gases can be corrosive. When sidewall venting,

protect walls with a corrosion resistant material. Also, terminate away from plants and shrubs.

?? Locate termination consistent with the National Fuel

Gas Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149 Installation Codes.

?? Locate termination away from other air-intake or

exhaust vents such as dryer vents, other gas appliance vents, or plumbing vents. Allow at least 3 feet to any other vent.

?? Terminal must not be located above a walkway,

driveway or within 10 feet of an adjacent building.

?? Do not locate termination underneath a veranda,

porch, or deck.

EXISTING VENT CONSIDERATIONS

When a Category I fu rnace is removed or replaced, the old venting system may not be properly sized to vent the remaining appliance(s), for example, a gas water heater. An improperly sized venting system may promote the formation of condensa te, leakage or spillage.

The following steps shall be followed with each appliance connected to the old venting system placed in operation, while any other appliances connected to the venting system are not in operation:

1. Seal any unused openings in the venting system;

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149 Installation Codes. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition;

3. In so far as is practical, close all building doors and windows and all doors between space in which appliance(s) connected to the venting system are located and other spaces of building.

4. Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Do not operate a summer exhaust fan.

Installer’s Information Manual Page 7

6. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance shall operate continuously;

7. Test for drafthood equipped appliance spillage at the drafthood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle;

8. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use;

9. If improper venting is observed during any of the above tests, the venting system must be corrected. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or CAN/CGA B149 Installation Codes to correct improper vent operation. Any "common vent" re-sizing must approach minimum size determined using current venting tables.

3. Cement 2” PVC pipe, 2” PVC elbow, and flue outlet together as shown in Figure 8. Position flue outlet such that street ell will be directly below vent elbow.

DIRECT OR NON-DIRECT VENTING?

This furnace may be installed using either direct venting or non-direct venting.

A direct-vented fu rnace takes all air for combustion directly into the fu rnace through a pipe from outdoors. To direct vent this furnace you must install two pipes to the outdoors. One pipe supplies combustion air that the furnace needs to operate. The other pipe vents flue gases to the outdoors.

Use direct venting when indoor air may be contaminated with chemicals such as chlorine, fluorine, bromine or iodine. When these chemicals are burned with natural gas or propane gas, acids are produced which may decrease heat exchanger life. You should also consider direct venting when furnace is installed in a space with limited combustion and ventilation air. See “CONFINED SPACE INSTALLATION” under the “NON-DIRECT VENTING” instructions.

A non-direct vented furnace takes all air for combustion from the room in which furnace is installed. Non-direct venting requires only one pipe for venting the flue gases to the outdoors but you must make sure there is enough air for combustion and ventilation.

VENTING INSTRUCTIONS: DOWNFLOW

1. Select venting option from Figure 9 that fits your installation. Downflow furnaces can be vented through top or either side. For direct venting, combustion air can come through top or either side.

2. From parts package find the following parts: section of 2” PVC pipe, 2” PVC elbow, PVC flue outlet fitting, and 1/2” street ell.

Figure 8. Downflow Vent Connection.

4. Cement 1/2” street ell to flue-outlet drain. Position street ell so that it will be angled down and toward front of furnace at a 45° angle when assembly is installed in furnace.

5. Install large hose clamp over rubber coupling on furnace draft inducer. Do not tighten hose clamp.

6. Push vent assembly into rubber coupling until it bottoms out and tighten hose clamp securely.

7. From parts package find long condensate hose and two hose clamps.

8. Attach condensate hose and one hose clamp to inducer-pan port A, located in upper right-hand corner of inducer pan. Hose should be curved toward 1/2” street ell in flue outlet.

9. Attach other end of hose and remaining hose clamp to 1/2” street ell.

10. Some models are shipped with a 3-inch to 2-inch reducer bush ing. When venting with 2-inch pipe, install reducer bushing in flue outlet fitting. See Table 1 or

Table 2 for correct vent diameter for your application.

11. Complete installation of venting system with field supplied parts.

12. Support vent pipe at furnace. Do not allow draft inducer and rubber coupling to support the weight of the vent pipe.

Page 8 Installer’s Information Manual

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 air pipes for direct venting.

Installer’s Information Manual Page 9

VENTING INSTRUCTIONS: HORIZONTAL AIR-LEFT

1. Select venting option from Figure 9 that fits your installation. Horizontal furnaces can be vented through top or through blower end of furnace (in most applications). For direct ve nting, combustion air can come through top or bottom.

2. From parts package, get PVC flue outlet fitting and large hose clamp.

3. Install large hose clamp over rubber coupling on furnace draft inducer. Do not tighten hose clamp. See Figure 10.

4. Push flue outlet fitting into rubber coupling until it bottoms out. Rotate flue outlet fitting until drain is on bottom as shown in Figure 10. Tighten hose clamp securely.

5. From parts package, get long condensate hose and two hose clamps.

6. Long condensate hose must be cut to fit between flue outlet drain and street ell. Proper length is 6¼ inches for 17½ or 20½ inch wide furnaces and 8½ inches for 23½ inch wide furnaces.

7. Attach condensate hose and one hose clamp to flue outlet fitting.

8. From parts package, get 1/2” street ell. Attach hose and remaining hose clamp to 1/2” street ell. Test fit street ell and hose assembly to inducer-pan port A, located in lower right -hand corner of inducer pan. Note the angle of the street ell.

9. Solvent weld street ell to inducer-pan port A at angle noted in previous step.

11. Complete installation of venting system with field supplied parts.

12. Support vent pipe at furnace. Do not allow draft inducer and rubber coupling to support the weight of the vent pipe.

VENTING INSTRUCTIONS: HORIZONTAL AIR-RIGHT

1. Select venting option from Figure 9 that fits your installation. Horizontal furnaces can be vented through top or through blower end of furnace (in most applications). For direct venting, combustion air can come through top or bottom.

2. Move inducer drain hose from middle drain port of inducer to inducer drain port at bottom of inducer-located near pressure switch. To do this, remove cap from inducer drain port near pressure switch. Save cap. Move hose from middle inducer drain hole to uncapped port. Install cap on open port.

3. Move pressure switch hose from inducer pan port “B” to inducer-pan port E. To do this, remove cap from inducer-pan pressure port E, at pressure switch end of inducer pan. Save cap. Move h ose from inducer-pan pressure port B to port E. Install cap on port B.

4. From parts package, get PVC flue outlet and 1/2” street ell.

5. Cement 1/2” street ell to flue-outlet drain. Position street ell so that it will be angled down and toward front of furnace at a 45° angle when assembly is installed in furnace.

6. Install large hose clamp over rubber coupling on furnace draft inducer. Do not tighten hose clamp.

7. Push flue outlet into rubber coupling until it bottoms out. Rotate flue outlet until street ell is on bottom as shown in Figure 11. Tighten hose clamp securely.

Figure 10. Horizontal Air-Left Vent Connection.

10. Some models are shipped with a 3-inch to 2-inch reducer bushing. When venting with 2-inch pipe, install reducer bushing in flue outlet. See Table 1 or Table 2 for correct vent diameter for your application.

Figure 11. Horizontal Air-Right Vent Connection.

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Thermo Pride Thermo Pace Downflow User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual