Nordyne RL 90+, RC 92+ User Manual

Gas Furnaces

Installation Instructions

*RC 92+ Full Size Upﬂ ow Condensing Furnace *RL 90+ Full Size Downﬂ ow Condensing Furnace

*RC 92+ Upﬂ ow *RL 90+ Downﬂ ow

WARNING:

Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for assistance. For additional information consult a qualiﬁ ed installer, service agency, or the gas supplier.

These instructions are primarily intended to assist qualiﬁ ed individuals experienced in the proper installation of this appliance. Some local codes require licensed installation/service personnel for this type of equipment. Read all instructions carefully before starting the installation.

DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

FOR YOUR SAFETY:

Do not store or use gasoline or other ﬂ ammable vapors and liquids in the vicinity of this or any other appliance.

FOR YOUR SAFETY:

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 your gas supplier, call the ﬁ re department.

• Extinguish any open ﬂ ame.

Table of Contents

Furnace Speciﬁ cations ............................................................................................................ 4-5

Furnace Airﬂ ow Data .......................................................................................................... 6-7

Safety Information ....................................................................................................................... 8

Installation Requirements ........................................................................................................... 8

Requirements and Codes ...................................................................................................... 8

Location ................................................................................................................................. 8

Downﬂ ow Warning ................................................................................................................. 9

Horizontal Installations ........................................................................................................ 10

Supply Air Plenum Installation .................................................................................................11

Installation on a Concrete Slab ........................................................................................... 11

Installation on a Combustible Floor ..................................................................................... 11

Circulating Air Supply ............................................................................................................... 11

Return Air ............................................................................................................................ 13

Venting and Combustion Air Requirements ........................................................................... 13

Combustion Air Quality ........................................................................................................ 15

Air Requirements for One-Pipe Installation ......................................................................... 15

Installation in An Unconﬁ ned Space .................................................................................... 15

Installation in A Conﬁ ned Space ......................................................................................... 15

• Air From Inside .................................................................................................................. 16

• Air Directly Through An Exterior Wall ................................................................................ 16

• Outdoor Air Through Vertical Openings or Ducts .............................................................. 17

• Outdoor Air Through Horizontal Openings or Ducts .......................................................... 17

Venting Requirements ............................................................................................................... 17

Vent Pipe Material ............................................................................................................... 18

Vent Pipe Length and Diameter ........................................................................................... 18

Vent Pipe Installation ........................................................................................................... 19

Pipe Routing & Support ....................................................................................................... 19

Location of Outdoor Terminations ........................................................................................ 20

• Horizontal Venting ............................................................................................................ 20

• Vertical Venting .................................................................................................................. 25

• Vent Freezing Protection ................................................................................................... 26

• Concentric and Side Wall Vent Termination ....................................................................... 27

Drainage of Condensate From Furnace ................................................................................. 27

Gas Supply and Piping ........................................................................................................ 27

Leak Check ......................................................................................................................... 27

Conversion .......................................................................................................................... 27

High Altitude Application ..................................................................................................... 29

Natural Gas High Altitude Conversion ................................................................................. 29

LP/Propane Gas Sea Level and High Altitude Conversion .................................................. 29

Electrical Wiring ......................................................................................................................... 31

Line Voltage Wiring .............................................................................................................. 31

Low Voltage Wiring .............................................................................................................. 31

Start-up and Adjustments.................................................................................................... 32-34

Start-Up Procedure .............................................................................................................32

Verifying and Adjusting Firing Rate ..................................................................................... 33

Verifying and Adjusting Temperature Rise ........................................................................... 34

Verifying Burner Operation .................................................................................................. 34

Verifying Operation of the Supply Air Limit Switch .............................................................. 34

Description of Components ..................................................................................................... 35

Maintenance ............................................................................................................................... 35

Combustion Air and Vent System ........................................................................................ 35

Air Filter(s) ........................................................................................................................... 35

Lubrication ........................................................................................................................... 35

Condensate Drain Assembly ............................................................................................... 35

Blower Compartment ........................................................................................................... 35

Heat Exchanger and Burner Maintenance .......................................................................... 34

Location of Major Components ........................................................................................... 37

System Operation Information ................................................................................................. 38

Sequence of Operation ....................................................................................................... 38

Furnace Fails to Operate ..................................................................................................... 39

Twinning of Two Furnaces ................................................................................................... 39

Installation/Performance Checklist .......................................................................................... 40

FURNACE SPECIFICATIONS

27 5/8"

2" PVC

Exhaust

Vent

3/4"

2 1/4"

‡

3/4"

1 1/2" x 3 1/2" Dia.

Opening for

(See Fig. 15

for sizes)

Gas Connection

7/8" Dia. Electric

25 5/8"

Connection

25 1/4"

30 1/4"

(Bottom)

Return Air Opening

23"

Bottom Return Opening

‡

Condensate Drain Outlets

See Table 3

‡

Inlet

23 1/4"

Combustion Air

Exhaust Vent

Upﬂ ow *RC Furnaces

Combustion Air

Vent 3"

(See Fig. 15

for sizes)

22 1/2"

19 3/4"

3/4"

Figure 1. Upﬂ ow Unit Dimensions

25 1/8"

Opening for

Gas Connection

1 1/2" x 3 1/2" Dia.

33"

25 1/4"

Connection

7/8" Dia. Electric

43"

20 1/2"

15"

28"

23"

Side Return

1 1/4"

3/4"

Vent

Combustion

2" for 40/60)

(3" for 80/100

‡

2" Dia.

Exhaust Vent

19 3/4"

3/4"

‡

3/4"

2 1/2"

24 7/8"

21 7/8"

Connection

7/8" Dia. Electric

Knockout For

1 1/2" x 2 1/2"

Gas Connection

10 1/4"

19 3/4"

Bottom Opening

Condensate

Drain Outlet

21 1/2"

Air Opening

Bottom Supply

‡

See Table 3

21 1/2"

24 1/2"

Combustion Air Inlet

3/4"

Downﬂ ow *RL Furnace

Connection

22 1/2"

Exhaust Vent

24 7/8"

7/8" Dia. Electric

3/4"

Figure 2. Downﬂ ow Unit Dimensions

43"

21 7/8"

15 1/2"

21 1/4"

Opening for

Gas Connection

1 1/2" x 3 1/2" Dia.

Condensate

Drain Outlet

27 7/8"

CAPACITIES —Furnace Airﬂ ow Data

External Static Pressure (Inches Water Column)

CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise

High* 950 36 920 38 890 39 850 41 800 43 750 46 690 50 630 55

NOTES: 1. Airﬂ ow rates of 1800 CFM or more require two return air connections. Data is for operation with ﬁ lter(s).

2. Temperature rises in the table are approximate. Actual temperature rises may vary.

3. Temperature rises and airﬂ ows for external static pressures greater than 0.5 are for reference only.

These conditions are not recommended.

Low 620 56 590 59 560 62 520 - 470 - 410 - 350 - 290 -

High* 1330 - 1280 - 1230 - 1170 - 1120 - 1030 - 940 37 850 41

High* 1310 - 1260 - 1210 - 1160 45 1100 47 1040 50 980 53 920 56

Low 800 65 780 67 760 68 740 70 710 73 680 - 650 - 620 -

Low 830 42 810 43 780 44 760 46 720 48 670 52 610 57 550 63

High* 1775 38 1724 39 1652 40 1583 42 1505 44 1430 46 1343 49 1226 54

Low 808 - 751 - 717 - 679 - 641 - 595 - 538 - 430 -

Med-Low 1031 65 987 67 967 69 914 73 882 75 839 - 783 - 692 -

High* 1840 - 1780 - 1700 41 1630 42 1550 45 1470 47 1380 50 1290 54

Low 1100 63 1050 66 1000 69 950 - 900 - 850 - 800 - 750 -

High* 2215 30 2155 31 2090 32 2030 33 1975 34 1885 35 1810 37 1730 39

Med-Low 1380 50 1350 51 1300 53 1250 55 1190 58 1120 62 1040 67 960 -

Med-Low 1670 39 1665 40 1660 41 1630 41 1590 42 1535 43 1470 45 1410 47

Low** 1365 48 1360 49 1350 49 1340 50 1305 51 1300 51 1255 53 1225 54

High* 1910 45 1860 47 1780 49 1700 51 1620 53 1520 57 1420 61 1310 66

Low 1230 70 1210 72 1180 73 1140 - 1090 - 1030 - 960 - 880 -

Med-Low 1440 60 1410 61 1370 63 1320 66 1270 68 1210 72 1140 - 1060 -

High* 2195 39 2140 40 2065 41 2000 42 1960 44 1860 46 1780 48 1695 50

Med-Low 1650 51 1615 52 1605 53 1570 54 1540 55 1485 57 1435 59 1370 62

Low 1320 64 1300 65 1280 66 1275 67 1265 67 1250 68 1210 70 1160 73

High* 1860 56 1800 58 1730 60 1650 63 1570 66 1480 70 1380 75 1270 82

Low 1230 84 1210 - 1180 - 1140 - 1090 - 1030 - 960 - 880 -

Med-Low 1440 72 1410 74 1380 75 1320 79 1280 81 1220 85 1150 - 1080 -

High* 2260 - 2200 - 2140 - 2070 - 1990 - 1910 - 1810 57 1710 61

Low 1360 76 1330 78 1310 79 1280 81 1250 83 1220 85 1190 - 1150 -

Med-Low 1540 67 1530 68 1510 69 1470 71 1430 73 1370 76 1300 80 1220 85

*RC- (Btuh) Speed HP

Model Heating

G6RC UPFLOW FURNACE

Number Input Motor Motor 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

040( )-12A 40,000 Medium** 1/3 1190 - 1160 - 1110 - 1060 - 1010 - 910 38 820 42 720 48

040( )-08A 40,000 Medium** 1/5 740 47 710 49 680 51 650 53 600 58 550 63 490 - 430 -

060( )-12A 60,000 Medium** 1/3 1160 45 1120 46 1080 48 1050 49 990 52 940 55 890 58 830 63

080( )-12B 80,000 Med-High** 1/2 1417 47 1385 48 1339 50 1280 52 1224 54 1163 57 1097 61 1013 66

080( )-16B 80,000 Med-High** 1/2 1600 43 1560 44 1470 47 1400 49 1350 51 1280 54 1210 57 1150 60

080( )-20B 80,000 Med-High 3/4 2000 33 1970 34 1930 35 1870 36 1820 37 1755 38 1695 39 1625 41

100( )-16B 100,000 Med-High** 1/2 1640 53 1620 53 1540 56 1480 58 1420 61 1340 65 1250 69 1150 75

100( )-20B 100,000 Med-High** 3/4 1975 43 1910 44 1875 45 1845 46 1805 47 1735 50 1670 51 1590 53

120( )-16C 120,000 Med-High** 1/2 1650 63 1610 65 1550 67 1480 70 1410 74 1320 79 1230 84 1120 -

120( )-20C 120,000 Med-High** 3/4 1870 56 1840 56 1790 58 1760 59 1710 61 1660 63 1610 65 1560 67

( ) Can be C or N

** Factory Set Cooling Speed

** Factory Set Heating Speed

- Not Recommended

Table 1. Furnace Airﬂ ow Data

CAPACITIES —Furnace Airﬂ ow Data continued

*RL- (Btuh) Speed HP CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise

Model Heating External Static Pressure (Inches Water Column)

Number Input Motor Motor 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

1. Airﬂ ow rates of 1800 CFM or more require two return air connections.

Data is for operation with ﬁ lter(s).

2. Temperature rises in the table are approximate. Actual temperature rises may vary.

3. Temperature rises and airﬂ ows for external static pressures greater than 0.5 are for reference only.

These conditions are not recommended.

High* 1280 - 1210 - 1180 - 1140 - 1090 - 1070 - 1030 - 990 -

Low** 875 39 835 41 820 41 805 42 780 43 770 44 760 45 750 45

040()-12 40,000 Medium 1/3 1140 - 1090 - 1060 - 1030 - 980 35 950 36 910 37 870 39

High* 1260 40 1190 43 1155 44 1120 45 1075 47 1030 49 980 52 940 54

060()-12 60,000 Medium** 1/3 1120 45 1070 48 1040 49 1010 50 960 53 930 55 890 57 850 60

Low 855 59 815 62 800 64 780 65 760 67 730 70 710 - 690 -

High* 1635 - 1585 - 1525 - 1460 46 1400 48 1330 51 1260 54 1180 57

080()-16 80,000 Med-High** 1/2 1435 47 1395 49 1350 50 1300 52 1255 54 1200 56 1150 59 1090 62

Med-Low 1230 55 1200 56 1165 58 1130 60 1090 62 1050 65 1000 68 960 71

Low 1050 - 1035 - 1010 - 980 - 950 - 910 - 870 - 820 -

High* 1600 53 1555 54 1500 56 1445 59 1380 61 1310 65 1240 68 1160 73

100()-16 100,000 Med-High** 1/2 1475 57 1435 59 1385 61 1335 63 1290 66 1240 68 1190 71 1130 75

Low 1150 - 1130 - 1110 - 1075 - 1040 - 1000 - 950 - 890 -

Med-Low 1320 - 1290 - 1250 - 1215 - 1170 - 1120 - 1070 - 1020 -

High* 2085 48 2035 49 1965 51 1910 52 1840 54 1780 56 1715 58 1630 61

120()-20 100,000 Med-High** 3/4 1925 52 1885 53 1835 55 1780 56 1730 58 1675 60 1615 62 1540 65

Med-Low 1720 58 1670 60 1630 61 1610 63 1570 64 1510 66 1465 68 1415 72

Low 1500 66 1495 69 1460 66 1430 70 1400 72 1365 73 1315 - 1265 -

( ) Can be C or N

* Factory Set Cooling Speed

** Factory Set Heating Speed

- Not Recommended

Table 2. Furnace Airﬂ ow Data

SAFETY INFORMATION

1. Use only with type of gas approved for this furnace. Refer to the furnace rating plate.

2. Install this furnace only in a location and position as speciﬁ ed on Table 4 of these instructions.

3. Provide adequate combustion and ventilation air to the furnace space as speciﬁ ed on Pages 13 through 16.

4. Provide adequate clearances around the vent air intake terminal(s) as speciﬁ ed on Figures 18 through 23 of these instructions.

5. Combustion products must be discharged outdoors. Connect this furnace to an approved vent system only, as speciﬁ ed on Pages 16 through 26.

6. Never test for gas leaks with an open ﬂ ame. Use a commercially available soap solution made speciﬁ cally for the detection of leaks to check all connections, as speciﬁ ed on Page 28 of these instructions.

7. Always install furnace to operate within the furnace’s intended temperature-rise range with a duct system which has an external static pressure within the allowable range, as speciﬁ ed on Table 2 of these instructions. See furnace rating plate.

8. When a furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air shall also be handled by duct(s) sealed to the furnace casing and terminating outside the space containing the furnace.

9. A gas-ﬁ red furnace for installation in a residential garage must be installed as speciﬁ ed on Page 10 of these instructions.

10. The furnace is not to be used for temporary heating of buildings or structures under construction.

INSTALLATION REQUIREMENTS

American National Standards Institute, Inc. 1430 Broadway New York, New York 10018 Canada installations shall comply with CAN/CGAB149 installation codes, local plumbing or waste water codes and other applicable codes. Additional helpful publications are:

• NFPA-90A - Installation of Air Conditioning and Ventilating Systems.

• NFPA-90B - Warm Air Heating and Air Conditioning Systems.

These publications are available from: National Fire Protection Association, Inc. Batterymarch Park Quincy, Massachusetts 02269

WARNING:

This furnace is not approved for installation in mobile homes. Installation in a mobile home could cause ﬁ re, property damage, and/or personal injury.

IMPORTANT NOTE

The Commonwealth of Massachusetts requires compliance with regulation 248 CMR 4.00 and

5.00 for installation of through – the – wall vented gas appliances as follows:

(a) For direct-vent appliances, mechanical-

vent heating appliances or domestic hot water equipment, where the bottom of the vent terminal and the air intake is installed below four feet above grade the following requirements must be satisﬁ ed:

1. If there is not one already present, on each ﬂ oor level where there are bedroom(s), a carbon monoxide detector and alarm shall be placed in the living area outside the bedroom(s). The carbon monoxide detector shall comply with NFPA 720 (2005 Edition).

Requirements and Codes

This furnace must be installed in accordance with these instructions, all applicable local building codes, and the current revision of the National Fuel Gas Code (ANSI-Z223.1, NFPA-54). The current revision of the National Fuel Gas Code is available from:

2. A carbon monoxide detector shall be located in the room that houses the appliance or equipment and shall:

a. Be powered by the same electrical

circuit as the appliance or equipment such that only one service switch

Model

Number

*RC040 40,000 14 1/4 12 3/4 5 1/8 11 3/4 133 *RC060 60,000 14 1/4 12 3/4 5 1/8 11 3/4 140 *RC080 80,000 19 3/4 18 1/4 7 7/8 17 1/4 172 *RC100 100,000 19 3/4 18 1/4 7 7/8 17 1/4 180 *RC120 120,000 22 1/2 21 9 1/4 20 204

*RL040 40,000 14 1/4 12 3/4 4 5/8 12 3/4 135 *RL060 60,000 14 1/4 12 3/4 4 5/8 12 3/4 135 *RL080 80,000 19 3/4 18 1/4 10 18 1/4 174 *RL100 100,000 19 3/4 18 1/4 10 18 1/4 185 *RL120 120,000 22 1/2 21 12 1/2 21 1/8 209

Furnace

Btuh

Table 3. Furnace Dimensions and Shipping Weights

ABCD

Dimensions (inches)

Shipping

Weight

(lbs

)

CLEARANCES TO COMBUSTIBLE MATERIALS

This furnace is Designed Certiﬁ ed by CSA International for the minimum clearances to combustible material listed in Table 4. See the furnace name plate, located inside the furnace cabinet, for speciﬁ c model number and clearance information.

MINIMUM CLEARANCES TO COMBUSTIBLE MATERIAL

Furnace Cabinet Minimum Clearances (Inches)

Input Width

(Btuh) (Inches) Side Vent Back Top Front

40,000 14 1/4 00011* 60,000 14 1/4 00011*

80,000 14 1/4 00011* 100,000 19 3/4 00011* 120,000 22 1/2 00011*

* When installed horizontally, 24 inches is required for servicing.

Table 4. Minimum Clearances to Combustible Materials

services both the appliance and the

carbon monoxide detector; b. Have battery back-up power; c. Meet ANSI/UL 2034 Standards

and comply with NFPA 720 (2005

Edition);and d. Have been approved and listed by

a Nationally Recognized Testing

Laboratory as recognized under 527

CMR.

3. A Product-approved vent terminal must be used, and if applicable, a Productapproved air intake must be used. In-

stallation shall be in strict compliance with the manufacturer’s instructions. A copy of the installation instructions shall remain with the appliance or equipment at the completion of the installation.

4. A metal or plastic identiﬁ cation plate shall be mounted at the exterior of the building, four feet directly above the location of vent terminal. The plate shall be of sufﬁ cient size to be easily read from a distance of eight feet away, and read “Gas Vent Directly Below”.

(b) For direct-vent appliances, mechanical-

vent heating appliances or domestic hot water equipment where the bottom of the vent terminal and the air intake is installed above four feet above grade the following requirements must be satisﬁ ed:

This furnace is certiﬁ ed for use on wood ﬂ ooring. The furnace must be installed on a solid surface and must be level front to back and side to side. This furnace must not be installed directly on carpeting, tile, or any combustible material other than wood ﬂ ooring.

2. A carbon monoxide detector shall:

a. Be located in the room that houses

the appliance or equipment;

b. Be either hard-wired or battery pow-

ered or both; and

c. Shall comply with NFPA 720 (2005

Edition).

3. A Product-approved vent terminal must be used, and if applicable, a Productapproved air intake must be used. Installation shall be in strict compliance with the manufacturer’s instructions. A copy of the installation instructions shall remain with the appliance or equipment at the completion of the installation.

DOWNFLOW WARNING (*RL Models):

The design of the downﬂ ow furnace is certiﬁ ed for natural or propane gas and for installation on non-combustible ﬂ ooring. A special combustible ﬂ oor sub-base is required when installing on a combustible ﬂ oor. Failure to install the sub-base may result in ﬁ re, property damage and personal injury. The special downﬂ ow sub-bases are factory supplied accessories, part number 902974, 902677, 904108 and 904165. Part #904108 is an adjustable sub-base kit and it can be used on all cabinet sizes. When the furnace is installed on a factory or site-built cased air conditioning coil, the sub-base is not necessary. However, the plenum attached to the coil casing must be installed such that its surfaces are at least 1” from combustible construction.

A gas-ﬁ red furnace installed in a residential garage must be installed so that the burners and the ignition source are located a minimum of 18” from the ﬂ oor. The furnace must be located or protected to avoid physical damage by vehicles.

Location

The furnace must be installed on a level surface, and as close to the center of the air distribution system as possible. See Table 3 for overall dimensions to determine the required clearances in hallways, doorways, stairs, etc. to allow the furnace to be moved to the installation point. The furnace must be installed so that all electrical components are protected from water. Minimum clearances to combustible materials are listed in Table 4. Access for positioning and servicing must be considered when locating the unit. Twenty four inches is the minimum required clearance for servicing the unit. Thirty inches is the minimum required clearance for positioning the unit. Thirty six inches is the recommended clearance from the front of the unit. Please note that a panel or door can be located such that the minimum clearance on the rating plate is satisﬁ ed, but that panel or door must be removable and allow the appropriate clearance for your installation.

HORIZONTAL INSTALLATIONS

The upﬂ ow model furnaces are approved for horizontal installation. Installation Kit #903568 is available for horizontal applications. The parts may also be ﬁ eld supplied. NOTE: Downﬂ ow models are NOT approved for horizontal installation.

CAUTION:

Damage to the product resulting from failure to follow instructions or use of unauthorized parts may void the manufacturer’s product warranty coverage.

The 90+ upﬂ ow furnace can be installed horizontally in an attic, basement, crawl space or alcove. This furnace can be installed horizontally to the clearances listed in Table 4 on a platform

5/8" Vinyl Cap

Pressure Switch

1/4" Vinyl Cap

Drain Trap

1/2" Vinyl

Cap

Soft

Tubing

Grey

Tubing

3" to 2"

Reducer

(Optional)

PVC Tee

PVC Reducer

Bushing

Soft Tubing

Looped to Provide

a Drain Trap

Figure 3. 90+ Upﬂ ow Converted for Horizontal Installation (Horizontal Right)

3" to 2"

Alternative

for

Horizontal

Vent

PVC Tee

Reducer Bushing

Reducer

(Optional)

Drainage Port

is Downard

Pressure Switch

(Condensate)

Soft Tubing

Vinyl Cap

Pressure

Switch

Soft Tubing

Looped to Provide

a Drain Trap

Tubing

Figure 4. 90+ Upﬂ ow Converted for Horizontal Installation (Horizontal Left)

or on the ceiling rafters. Note that the platform and the ceiling rafters must be able to support the weight of the furnace being installed. It can also be suspended from a ceiling in a basement or utility room in either a right to left airﬂ ow or left to right airﬂ ow.

When installed horizontally, the furnace must be raised above the surface to allow a drain trap to hang vertically below the furnace. This will allow for proper drainage of the condensate from the furnace.

Conversion of the 90+ Upﬂ ow Furnace for a Horizontal Right Installation.

1. Remove the hard “J” tube drain trap assembly.

2. Place the 5/8” cap plug over the drain tap in the header box from which the “J” drain trap assembly was removed.

3. Remove the piece of soft tubing running from the in-line drain assembly to the header box and place a 1/2” vinyl cap over the drain tap in the in-line drain assembly.

Soft

Grey Tubing

Drain Trap

1/4" Vinyl Cap

4. Remove the grey tubing from the pressure switch to the header box. Remove the 1/4” cap from the pressure tap on the right side of the header box and place it on the corresponding pressure tap on the opposite side of the header box.

Conversion of the 90+ Upﬂ ow Furnace for a Horizontal Left Installation.

Refer to Figure 4 for details and description of parts required for the horizontal left conversion.

1. Remove the hard “J” tube drain trap assembly.

2. Ensure that the piece of soft tubing running from the in-line drain assembly to the header box is in place with the drain oriented downwards (See Figure 4).

3. Connect a draw trap to the right side of the header on the furnace. The drain trap must be installed according to local code. NOTE: A downward slope must be maintained on the tube as it is routed through the furnace (when the furnace is in the horizontal position).

NOTE: To avoid condensate freezing in the drain

trap assembly and tubing, insulate around the drain trap assembly and all tubing located in unconditioned space.

When a cooling system is installed which uses the furnace blower to provide airﬂ ow over the indoor coil, the coil must be installed downstream (on the outlet side) or in parallel with the furnace.

NOTE: When converting the furnace, to horizontal left, ensure that the drainage port on the in-line drain assembly is downward as shown in Figure

4. If the in-line drain assembly is not rotated, then the furnace may not drain properly.

SUPPLY AIR PLENUM INSTALLATION

A. Installation on a concrete slab - *RL

1. Construct a hole in the ﬂ oor per the dimensions in Figure 5.

2. Place the plenum and the furnace as shown in Figure 6.

B. Installation on a combustible ﬂ oor - *RL

1. Cut hole and frame the hole per the dimensions in Figure 7.

2. Place sub-base for combustible ﬂ oors over the hole with its duct collar extended downward. Attach the supply air plenum to the base in a manner which will assure 1” clearance to the ﬂ ooring or other combustible material. Place furnace on the combutsible base as shown in Figure 8.

3. When the furnace is installed on a factory or site-built cased air conditioning coil, the sub-base is not necessary. However, the plenum attached to the coil casing must be installed such that its surfaces are at least 1” from combustible material in Figure 9.

CIRCULATING AIR SUPPLY

Plenums and air ducts must be installed in accordance with the Standard for the Installation of Air Conditioning and Ventilating Systems (NFPA No. 90A) or the Standard for the Installation of Warm Air Heating and Air Conditioning Systems (NFPA No. 90B).

If a cooling system is installed in parallel with the furnace, a damper must be installed to prevent chilled air from entering the furnace and condensing on the heat exchanger. If a manually operated damper is installed, it must be designed so that operation of the furnace is prevented when the damper is in the cooling position and operation of the cooling system is prevented when the damper is in the heating position.

WARNING:

Products of combustion must not be allowed to enter the return air ductwork or the circulating air supply. Failure to prevent products of combustion from being circulated into the living space can create potentially hazardous conditions including carbon monoxide poisoning that could result in personal injury or death.

All return ductwork must be secured to the furnace with sheet metal screws. For installations in conﬁ ned spaces, all return ductwork must be adequately sealed and joints must be taped. When return air is provided through the bottom of the furnace, the joint between the furnace and the return air plenum must be sealed.

The ﬂ oor or platform on which the furnace is mounted must provide sound physical support of the furnace with no gaps, cracks, or sagging between the furnace and the ﬂ oor or platform.

If outside air is utilized as return air to the furnace for ventilation or to improve indoor air quality, the system must be designed so that the return air to the furnace is not less than 50°F (10°C) during heating operation. If a combination of indoor and outdoor air is used, the ducts and damper system must be designed so that the return air supply to the furnace is equal to the return air supply under normal, indoor return air applications.

Return air and circulating air ductwork must not be connected to any other heat producing device such as a ﬁ replace insert, stove, etc.

Return Air

The return air ductwork may be connected to any or all of the following: left side return, right side return, or bottom return. Tables 1 and 2 show the airﬂ ow data for each furnace model. Where

maximum airﬂ ow is 1800 CFM or more two openings must be used.

VENTING AND COMBUSTION AIR REQUIREMENTS

NORDYNE condensing furnaces may be installed with outdoor combustion air piped directly to the furnace, or without such special piping. Codes refer to the former as “direct vent” or “two pipe” installation. Installation with air taken from around the furnace is sometimes referred to as “one pipe” installation where only the vent (exhaust) pipe is provided.

Provisions must be made for adequate supply of air for combustion and ventilation. For United States installations, the adequacy of air provisions can be determined by consulting the current version of the National Fuel Gas Code (ANSI Z223.1/NPFA-54). For Canadian installations, requirements are speciﬁ ed in the National Standard of Canada (CAN/CGA B149.1 & .2). Consult local codes for special requirements.

An important consideration in selecting one or two pipe installation is the quality of the combustion air. Indoor air is sometimes contaminated with various household chemicals which can cause severe corrosion in the furnace combustion system.

NOTE: If the furnace is operated without adequate air for combustion and ventilation, it may not perform properly. Furnace components may be strained by high temperature and could fail .

WARNING:

Furnace installation using methods other than those described in the following sections must comply with the National Fuel Gas Code and all applicable local codes to provide sufﬁ cient combustion air for the furnace.

Concrete

Furnace

Floor

Sheet

Metal

Plenum

Figure 6. Furnace on a Concrete Slab

MODEL A B

*RL 040/060 13.25” 19.25”

*RL 080/100 18.75” 19.25”

*RL 120 21.50” 19.25”

Figure 5. Opening for Concrete Slab

MODEL A B

*RL 040/060 13.25” 19.63”

*RL 080/100 18.75” 19.63”

*RL 120 21.50” 19.63”

Figure 7. Opening in Wood Floor

Downflow

Sub-base

Furnace

Wood

Floor

Sheet

Metal

Plenum

Figure 8. Furnace on a Wood Floor

* RL 040/060

18.75"

or 13.25" or 21.50"*

** RL 120

9.25"

2.0"

Upﬂ ow Models

Screen

Downﬂ ow Models

Figure 10. Protective Screen for

One Pipe Installations

Each opening must be at least 100 sq. in. or 1 sq. in. per 1000

Protective

Vent or Chimney

Btuh of total input rating, whichever is greater. See minimum area per table.

16.75"

or 11.25"

1.50"

19.75"

or 14.25"*

or 22.50"**

28.38"

1.58"

1 inch thick fiberglass 3 lb density

Figure 9. Downﬂ ow Sub-Base

Dimensions

19.63"

12" Max.

Furnace

12" Max.

Water Heater

Total Input

Rating (Btuh)

40,000 60,000 80,000 100,000 120,000 140,000 160,000

Minimum

Free Area

(Each Opening)

100 sq. in. 100 sq. in. 100 sq. in. 100 sq. in. 120 sq. in. 140 sq. in. 160 sq. in.

Round Duct

Diameter

12" 12" 12" 12" 13" 14" 15"

Figure 11. Equipment in a Conﬁ ned Space

with all Combustion Air drawn from Inside

Each opening to outside must be at least 1 sq. in. per 4000 Btuh of total input rating.

12"

Max

12" Max

Vent or Chimney

Water Heater

Furnace

Alternate

Air Inlet

---------

Vent or Chimney

Water Heater

Inlet Air

---------

Ventilation Louvers (each end of attic)

---------

Outlet

NOTE: Air openings shall each

Air

have a free area of not less than one square inch per 4,000 Btuh of the total input rating of all equipment in the enclosure.

---------

Total Input

Rating (Btuh)

40,000 60,000 80,000 100,000 120,000 140,000 160,000

Free Area

(Each Opening)

10 sq. in. 15 sq. in. 20 sq. in. 25 sq. in. 30 sq. in. 35 sq. in. 40 sq. in.

Round Duct

Diameter

4" 5" 5" 6" 6" 7" 8"

Figure 12. Equipment in a Conﬁ ned Space

with all Combustion Air drawn from Out-

doors through Exterior Wall

Ventilation Louvers at each end of attic

Minimum

Vent or Chimney

Attic Insulation

Water Heater

Total Input

Rating (Btuh)

40,000 60,000 80,000 100,000 120,000 140,000 160,000

Furnace

Minimum

Free Area

(Each Opening)

10 sq. in. 15 sq. in. 20 sq. in. 25 sq. in. 30 sq. in. 35 sq. in. 40 sq. in.

Air Duct must be at least 1 sq. in. per 4,000 Btuh of total input rating.

Ducts must extend above attic insulation.

Air Duct must be at least 1 sq. in. per 4,000 Btuh of total input rating.

12" Max

Round Duct

Diameter

4" 5" 5" 6" 6" 7" 8"

Ventilation Louvers For Unheated Crawl Space

Figure 14. Equipment in a Conﬁ ned Space

with all Combustion Air drawn from Out-

doors through Ventilated Crawl Space and

Ventilated Attic

Vent or

Chimney

Air Duct must be at least 1 sq. in. per 2000 Btuh of total input rating.

Round Duct

Diameter

5" 6" 7" 8" 9" 10" 10"

Total Input

Rating (Btuh)

40,000 60,000 80,000 100,000 120,000 140,000 160,000

Air Duct

Furnace

Air Duct

Water Heater

Minimum

Free Area

(Each Opening)

20 sq. in. 30 sq. in. 40 sq. in. 50 sq. in. 60 sq. in. 70 sq. in. 80 sq. in.

Figure 13. Equipment in a Conﬁ ned

Space with all Combustion Air drawn from

Outdoors through Vertical Ducts – from

Ventilated Attic

Figure 15. Equipment in a Conﬁ ned Space

with all Combustion Air Drawn from the

Outside through Horizontal Ducts

Combustion Air Quality

The recommended source of combustion air is to use the outdoor air supply. However, the use of indoor air in most applications is acceptable except as follows:

1. If the furnace is installed in a conﬁ ned space it is recommended that the necessary combustion air come from the outdoors by way of attic, crawl space, air duct, or direct opening.

2. If outdoor combustion air is used, there must be no exposure to the installations or substances listed in Item 3 below.

3. The following types of installation may require Outdoor Air for combustion, due to chemical exposures:

• Commercial buildings

• Buildings with indoor pools

• Furnaces installed in laundry rooms

• Furnaces installed in hobby or craft

rooms

• Furnaces installed near chemical storage

areas

Exposure to the following substances in

the combustion air supply may also require Outdoor Air for combustion:

• Permanent wave solutions

• Chlorinated waxes and cleaners

• Chlorine based swimming pool chemi-

cals

• Water softening chemicals

• De-icing salts or chemicals

• Carbon tetrachloride

• Halogen type refrigerants

• Cleaning solvents (such as perchloroethylene)

• Printing inks, paint removers, varnishes, etc.

• Hydrochloric acid

• Cements and glues

• Antistatic fabric softeners for clothes dryers

• Masonry acid washing materials

Air Requirements For One-Pipe Installation

When air for combustion is to be taken from around the furnace, a protective screen must be installed over the combustion air intake opening. This screen is provided with the furnace installation instructions and functions to prevent debris

from entering the combustion system. It should be installed on the combustion air intake collar or inlet PVC. If furnace location is such that this opening might be unintentionally obstructed, a 3” PVC elbow must be installed on the collar, and the screen placed inside the inlet of the elbow. See Figure 10.

Installation In An Unconﬁ ned Space

CAUTION:

“Tight” buildings (with weather stripping and caulk to reduce inﬁ ltration), may require special provisions for introduction of outside air to ensure satisfactory combustion and venting, even though the furnace is located in an unconﬁ ned space.

An unconﬁ ned space is an area including all rooms not separated by doors with a volume greater than 50 cubic feet per 1,000 Btuh of the combined input rates of all appliances which draw combustion air from that space. For example, a space including a water heater rated at 45,000 Btuh and a furnace rated at 75,000 Btuh requires a volume of 6,000 cubic feet [50 x (45 + 75) = 6,000] to be considered unconﬁ ned. If the space has an 8 foot ceiling, the ﬂ oor area of the space must be 750 square feet (6,000 / 8 = 750). In general, a furnace installed in an unconﬁ ned space will not require outside air for combustion.

WARNING:

Furnaces installed with combustion air drawn from a heated space which includes exhaust fans, ﬁ replaces, or other devices that may produce a negative pressure should be considered conﬁ ned space installations.

Installation In A Conﬁ ned Space

A conﬁ ned space is one which does not meet the unconﬁ ned space volume requirements, and typically involves installation in a small room. All such installations must have speciﬁ c provisions for introduction of combustion and ventilation air.

Codes require that two openings be provided for this - one with bottom edge within 12” of the ﬂ oor and one with top edge within 12” of the ceiling.

The size and other criteria for these openings must be per the following sections.

CAUTION:

Combustion air openings must not be restricted in any manner.

Furnaces installed in a conﬁ ned space which supply circulating air to areas outside of the space must draw return air from outside the space and must have return air ducts tightly sealed to the furnace.

Air From Inside

Air for combustion and ventilation may be taken from inside the building through an interior wall if

the building is not “tight” and if the total volume of the furnace space and the space from which air is drawn meets the volume requirements for an unconﬁ ned space. In such cases, the two

openings in the wall must each have free area of at least one square inch per 1000 Btuh of total appliance input, but not less than 100 square inches of free area. See Figure 11. For example, if the combined input rate of all appliances is less than or equal to 100,000 Btuh, each opening must have a free area of at least 100 square inches. If the combined input rate of all appliances is 120,000 Btuh, each opening must have a free area of at least 120 square inches.

Air Directly Through An Exterior Wall

If combustion air is provided directly through an exterior wall, the two openings must each have free area of at least one square inch per 4000 Btuh of total appliance input. (See Figure 12.)

Outdoor Air Through Vertical Openings or Ducts

If combustion air is provided through vertical ducts or openings to attics or crawl spaces, the two openings must each have free area of at least one square inch per 4000 Btuh of total appliance input. Ducts must have cross-sectional areas at least as large as the free area of their respective openings to the furnace space. Attics or crawl spaces must communicate freely with the outdoors if they are the source of air for combustion and ventilation. (See Figures 13 and 14.)

Do not supply combustion air from an attic space that is equipped with power ventilation or any other device that may produce a negative pressure.

VENTING REQUIREMENTS

This section speciﬁ es installation requirements for vent and “2-pipe” combustion air piping. For “one pipe” installations, install vent piping per this section and provide air for combustion and ventilation per the previous section. The capacity table provided in this section applies to the total of vent and combustion air piping for either type of installation.

NORDYNE condensing furnaces are classiﬁ ed as “Category IV” appliances, which require special venting materials and installation procedures. Category IV appliances operate with positive vent pressure and therefore require vent systems which are thoroughly sealed. They also produce combustion condensate, which is slightly acidic and can cause severe corrosion of ordinary venting materials. Furnace operation can be adversely affected by restrictive vent and combustion air piping. Therefore, vent and combustion air piping

lengths must conform completely to the requirements of Table 5.

The furnace must be vented to the outdoors. It must not be vented in common with any other appliance, even if that appliance is of the condensing type. Common venting can result in severe corrosion of other appliances or their venting and can allow combustion gases to escape through such appliances or vents. Do not vent the furnace to a ﬁ replace chimney or building chase.

WARNING:

FURNACE MUST NOT BE COMMON VENTED WITH OTHER APPLIANCES.

Outdoor Air Through Horizontal Openings or Ducts

If combustion air is taken from outdoors through horizontal ducts, the openings must each have free area of at least one square inch per 2000 Btuh of total appliance input. Ducts must have cross-sectional area at least as large as the free area of their respective openings to the furnace space. (See Figure 15.)

Horizontal Installations

In order to ensure complete drainage of all condensate, an additional “T” drain assembly may be installed in line with the vent piping (see Figures 3 & 4). The “T” assembly may consist of a 2” PVC tee with a 2’ to 1/2” PVC reducer bushing , and a barb ﬁ tting. These parts are available in Horizontal Vent Kit 903568, or they can be ﬁ eld supplied.

WARNING:

CARBON MONOXIDE

POISONING HAZARD

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 or the CAN/CGA B149 Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deﬁ ciencies which could cause an unsafe condition.

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

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

5. Turn on clothes dryers and any other 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.

6. Close ﬁ replace dampers.

7. Test for spillage from draft hood equipped appliance at the draft hood relief opening after 5 minutes of main burner operation. Use the ﬂ ame of a match or candle.

8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI

Z223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Codes.

9. 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, ﬁ replace dampers and any other gas burning appliance to their previous conditions of use.

Vent Pipe Material

Vent and combustion air pipe and ﬁ ttings must be one of the following materials and must conform to the indicated ANSI/ASTM standards:

Material Standard Schedule 40 PVC D1785 PVC-DWV D2665 SDR-21* D2241 & SDR-26* ABS-DWV D2661 Schedule 40 ABS F628 Foam/Cellular Core PVC F891

*In Canada, check the local codes to ensure that SDR is approved for use. SDR is not approved for all Canadian installations.

Cement and primer must conform to ATSM Standard D2564 for PVC and Standard D2235 for ABS. When joining PVC piping to ABS, use PVC solvent cement. (See procedure speciﬁ ed in ASTM Standard D3138.)

Vent Pipe Length and Diameter

In order for the furnace to operate properly, the combustion air and vent piping must not be excessively restrictive. To ensure this use Table 5, which indicates the maximum allowable piping length for a furnace of speciﬁ ed input rate, when installed with piping of selected diameter and number of elbows. This table applies to the length and number of elbows for each pipe. To use the table, the furnace input rate, the centerline length and the number of elbows on each pipe must be known. Choose the diameter for which the tabulated length is equal to or greater than required.

Proper use of the table is illustrated by the following example:

Example:

An 80,000 Btu/h furnace is to be installed in a “one-pipe” system with 40 feet of vent piping. There are a total of four long radius 90-degree elbows used in the vent, including the one exterior to the building.

Solution:

For this particular installation, the equivalent vent length must be calculated. This equivalent vent length will then be compared to the maximum allowable vent length given in Table 5. Then, the diameter of the piping can be chosen for which the

APPLICATION

SINGLE PIPE LENGTH (ft.)

with 1 long radius elbow*

DIRECT VENT, DUAL PIPE LENGTH (ft.)

with 1 long radius elbow on each pipe*

PVC,CPVC or ABS Outlet Outlet Inlet/Outlet Inlet/Outlet Inlet/Outlet

SCH. 40 Pipe Size 2” 3” 2” 2” 3” 2” 3” 3”

Models 040

80 150 40 40 50 50 90 90

Models 060 & 080 60 150 30 30 35 35 90 90

Models 100 & 120 30 150 15 15 25 25 90 90

**NOTES

1. Subtract 2.5 ft. for each additional 2” long radius elbow, 5 ft. for each additional 2” short radius elbow, 3.5’ for each additional 3” long radius elbow, and 7’ for each additional 3” short radius elbow.

2. Two 45 degree elbows are equivalent to one 90 degree elbow.

3. Do not include termination elbows in calculation of vent length

4. This table is applicable for elevations from sea level to 2000 ft. For higher elevations decrease vent pipe lengths by 8% per 1000 ft. of altitude.

5. Only the above pipe materials are approved for use with these condensing furnaces.

Table 5. Vent Table

Upﬂ ow Furnaces

5/8"

Combustion Offset with

Exhaust Pipe for Adequate Dimensional Clearance

PVC or ABS Pipe

Straight Neoprene Coupling with 2 Hose Clamps* (Optional - Not Shown)

Inlet

Exhaust

See Vent Table 5

Straps or Other Suitable

Supports at Minimum of 5 ft. Intervals

Upward Pitch - 1/4" per Foot

Outlet Exhaust Vent

First Support Placed as Close to Furnace Connection as Possible

Exhaust Vent

Wall

Seal/Caulk around Pip at Building

90˚ Elbow

12" Min.

Normal Snow Level

Downﬂ ow Furnaces

Exhaust

Seal/Caulk around Pipe at Building

90˚ Elbow

12" Min.

Normal Snow Level

See Vent Table 5

Straps or Other Suitable

Supports at Minimum of 5 ft. Intervals

Upward Pitch - 1/4" per Foot

Outlet Exhaust Vent

First Support Placed

Wall

as Close to Furnace

Connection as Possible

Exhaust Vent

* These neoprene couplings are ﬁ eld-supplied and can be used if the installation requires breakable connections in the piping.

Note that a maximum of two couplings per pipe are allowed.

Figure 16. Horizontal Venting

Inlet

5/8"

Combustion Air Inlet

Offset with Exhaust Pipe for Adequate Dimensional Clearance

PVC or ABS Pipe

Straight Neoprene Coupling with 2 Hose Clamps*

equivalent vent length is less than the maximum allowable vent length. Returning to our example, we consult Table 5 and determine that for an 80,000 Btu/h furnace the maximum vent length for 2” diameter piping is 60 feet or for 3” diameter piping is 150 feet. Note that the maximum vent length given in Table 5 includes one long radius elbow. Therefore, for our example, we have three additional long radius elbows for which we must add to our piping. Each long radius elbow is equivalent to 2.5 feet, so we must add 7.5 feet to our vent length. Therefore, the equivalent vent length for our installation is 47.5 feet. We compare this with the maximum vent length for 2” and 3” diameter piping. For both cases, our equivalent vent length is less than the maximum allowable vent length, so for our “one-pipe” installation we can use either 2” or 3” diameter piping.

Condensing furnace combustion products have very little buoyancy, so Table 5 is to be used without consideration of any vertical rise in the piping.

NOTE: Always use the same or larger size piping for combustion air as is used for the exhaust vent.

Vent Pipe Installation

Pipe Routing and Support

Route piping as directly as possible between the furnace and the outdoors and remember that routing affects pipe size requirements per the preceding section. If a two pipe system is used, locate the combustion air intake and the vent exhaust in the same atmospheric pressure zone - i.e. both must exit the building though the same portion of exterior wall or roof (See Figure

22). Vent piping must be sloped upwards not less than 1/4” per foot in the direction from the furnace to the terminal. This is to ensure that any condensate ﬂ ows back to the furnace (where it can be disposed of through the condensate disposal system).

The quality of outdoor air must also be considered. Be sure that the combustion air intake is not located near a source of solvent fumes or other chemicals which can cause corrosion of the furnace combustion system.

CAUTION:

Piping must be mechanically supported so that its weight does not bear on the furnace. Supports must be at intervals no greater than ﬁ ve feet, and at smaller intervals if necessary to ensure that there are no sagging sections to trap water. (See Figure 16.) It is recommended to install couplings along the vent pipe, on either side of the exterior wall. These couplings may be required by local code.

Figure 18 illustrates vent and combustion air pipe sizes exiting the furnace. Transition to the correct pipe size must be done close to the furnace so that the full length of pipe is of proper size.

Straight neoprene couplings are supplied with the downﬂ ow furnaces only. These couplings are to be installed in the combustion air inlet (if present) and exhaust vent piping at the furnace as shown in Figures 16. For an upﬂ ow furnace installation, if breakable connections are required in the combustion air inlet (if present) and exhaust vent piping, then straight neoprene couplings for 2” or 3” piping with hose clamps can be used. These couplings can be ordered through your local furnace distributor.

To install a coupling, slide the rubber coupling over the end of the pipe that is attached to the furnace and secure it with one of the hose clamps. Then slide the other end of the rubber coupling onto the other pipe from the vent and secure the coupling with the second hose clamp. Ensure that the connection is tight and leak free.

NORDYNE condensing furnaces have been certiﬁ ed for installation with zero clearance between vent piping and combustible surfaces. However, it is good practice to allow space for convenience in installation and service.

Location of Outdoor Terminations

Horizontal Venting

Vent and combustion air intake terminations must be as shown in Figure 19 and 20. Vent termination clearances shall be consistent with the National Fuel Gas Code, ANSI 2223.1/NFPA 54 and/or the CSA B149.1, Natural Gas and Propane Installation Code.

All minimum clearances speciﬁ ed must be maintained to protect building materials from degradation by ﬂ ue gases.

Combustion air must not be drawn from a corrosive atmosphere.

Upﬂ ow Furnaces

Support System on

Vertical Rise Below Joints

Support System with

first support as close

to furnace as Possible

Combustion

Air Pipe

Furnace Front

Downﬂ ow Furnaces

Exhaust

Vent

Exhaust

Vent

Straight Neoprene Couplings with 2 Hose Clamps* (Optional - Not Shown)

Cabinet

Vertical Rise Below Joints

Support System with

first support as close

to furnace as Possible

Combustion

Air Pipe

Upward Pitch 1/4" per Foot

Support System on

Straight Neoprene Rubber Couplings with 2 Hose Clamps*

Cabinet

Furnace Front

Upward Pitch 1/4" per Foot

Figure 17. Vertical Venting

* These couplings are ﬁ eld-supplied and can be used if the installation requires breakable connec-

tions in the piping. Note that a maximum of two couplings per pipe are allowed.

Upﬂ ow Furnaces

Combustion Air Inlet Pipe Collar Diameter 3" for coupling or reducer

Furnace Top

2" PVC Exhaust Vent All Models

Downﬂ ow Furnaces

Combustion Air Inlet 2" PVC on 040/060 models, 3" PVC on 080/100 models

Furnace Top

2" PVC Exhaust Vent All Models

Figure 18. Furnace Pipe Adaptions

WARNING:

Ensure that the combustion air vent and the exhaust vent are conﬁ gured as shown in Figure 19 and 20. Improper vent termination can cause recirculation of the ﬂ ue gases. This may result in furnace vibration. In severe cases, the furnace will cycle due to the intermittent contact between the ﬂ ame and the ﬂ ame sensor. If you note oscillations occurring, check the vent conﬁ guration. Make sure that the exhaust vent does not have a 90 degree termination.

Vent and combustion air intake terminations must be located to ensure proper furnace operation and to conform to applicable codes. Figure 19 and 20 illustrates necessary distances from the vent termination to windows and building air intakes. In Canada, the Canadian Fuel Gas Code

takes precedence over these instructions. Speciﬁ cally, all minimum distance requirements with respect to termination of the vent piping listed below (items 1 through 8).

These distances apply ONLY to U.S. installations. In Canada, the Canadian Fuel Gas Code takes precedence.

7. Avoid areas where condensate drainage may cause problems by dropping on planters or patios, etc. Also ensure that exhaust gases will not impinge on windows or building surfaces, which may be compromised or damaged by condensation. Do not install the vent terminal such that exhaust is directed into window wells, stairwells, under decks or into alcoves or similar recessed areas, and do not terminate above any public walkways.

8. Select the point of wall penetration where the minimum 1/4 inch per foot of slope up can be maintained.

CAUTION:

For optimum performance, vent furnace through wall which experiences the least exposure to winter winds.

For Canadian installations please refer to the Canadian Installation Code (CAN/CGA-B149.1 or 2) and/or local codes.

The following list is a summary of vent terminal location requirements:

1. The termination must be 12 inches above snow level or grade level whichever is higher. See Figure 18 for alternate method to achieve 12” above snow level.

2. The minimum distance for a (1-pipe installation) from any door, (openable) window, or gravity air inlet is 4 ft. below, 4 ft. horizontally, or 1 ft. above.

3. The minimum distance for a direct vent (2pipe) installation from any door, (openable) window, or air gravity inlet is 1 ft. below, 1 ft. horizontally, or 1 ft. above.

4. For one-pipe installations the recommended minimum distance from an inside corner formed by two exterior walls is 6 feet, but is not required.

5. The vent termination for a 1-pipe installation shall be a minimum of 3 ft. above any forced air inlet within 10 ft.

6. The vent termination shall be located at least 3 ft. horizontally from any electric meter, gas meter, regulator and any relief equipment in accordance to ANSI 2223.1/NFPA S4.

The horizontal venting kits consist of two face plates and an insulating gasket to seal the exterior surface. A hole sized closely to the pipe diameter must ﬁ rst be cut through the wall. A short length of pipe is then cut such that it can penetrate the wall and be held in place by closely ﬁ tting standard couplings. The face plates are retained on both sides of the wall by the couplings, and the gasket is retained against the wall by the outer face plate. Face plates must be fastened to the wall and the outside one must be ﬂ ashed as appropriate to prevent entry of water.

When the horizontal kits are not used, the following steps are required:

1. Check the hole size cut through the exterior wall. Insure that the hole diameter is less than the diameter of the couplings to be used.

2. Extend the vent pipe through the wall approximately 1” and seal the area between the wall and pipe.

3. If required by local code, apply couplings to the vent pipe on the interior and exterior sides of the wall to insure the pipe can not be pushed or pulled through the wall.

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

A =

Clearance above grade, veranda, porch,

Canadian Installations

US Installations

12 inches (30 cm) 12 inches (30 cm)

deck, or balcony

B =

Clearance to window or door that may be opened

C =

Clearance to permanently closed window

D =

Vertical clearance to ventilated sofﬁ t located above the terminal within a horizontal distance of 2 feet (61 cm) from

6 inches (15 cm) for appliances 10,000 Btuh (3 kW), 12 inches (30 cm) for appliances > 10,000 Btuh (3 kW) and 100,00 Btuh (30 kW), 36 inches (91 cm) for appliances >100,00 Btuh (30 kW)

6 inches (15 cm) for appliances 10,000 Btuh (3 kW), 9 inches (23 cm) for appliances > 10,000 Btuh (3 kW) and 50,000 Btuh (15 kW), 12 inches (30 cm) for appliances > 50,000 Btuh (15 kW)

the center line of the terminal

E =

Clearance to unventilated sofﬁ t

F =

Clearance to outside corner

G =

Clearance to inside corner

H =

Clearance to each side of center line extended above meter/regulator assembly

I =

Clearance to service regulator vent outlet 3 feet (1.83 m)

J =

Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other appliance

3 feet (91 cm) within a height 15 feet above the meter/regulator assembly

6 inches (15 cm) for appliances 10,000 Btuh (3 kW), 12 inches (30 cm) for appliances > 10,000 Btuh (3 kW) and 100,00 Btuh (30 kW), 36 inches (91 cm) for appliances >100,00 Btuh (30 kW)

K =

Clearance to a mechanical air supply inlet 6 feet (1.83 m) 3 feet (91 cm) above if within 10 feet

6 inches (15 cm) for appliances 10,000 Btuh (3 kW), 9 inches (23 cm) for appliances > 10,000 Btuh (3 kW) and 50,000 Btuh (15 kW), 12 inches (30 cm) for appliances > 50,000 Btuh (15 kW)

(3 m) horizontally

L =

Clearance above paved sidewalk or paved driveway located on public property

M =

Clearance under veranda, porch deck, or balcony

7 feet (2.13 m) †

12 inches (30 cm) ‡

In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code

In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code

† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves

both dwellings. ‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the ﬂ oor. * For clearances not speciﬁ ed in ANSI Z223.1 / NFPA 54 or CSA B149.1, the following statement shall be included:

“Clearance in accordance with local installation codes, and the requirements of the gas supplier and the manufacturer’s

installation instructions.”

Figure 19. Vent Termination Clearances for Direct Vent Furnaces

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

A =

Clearance above grade, veranda, porch,

Canadian Installations

US Installations

12 inches (30 cm) 12 inches (30 cm)

deck, or balcony

B =

Clearance to window or door that may be opened

6 inches (15 cm) for appliances 10,000 Btuh (3 kW), 12 inches (30 cm) for

4 feet (1.2 m) below or to side of opening;

1 foot (300 mm) above opening appliances > 10,000 Btuh (3 kW) and 100,00 Btuh (30 kW), 36 inches (91 cm) for appliances >100,00 Btuh (30 kW)

C =

Clearance to permanently closed window

D =

Vertical clearance to ventilated sofﬁ t located above the terminal within a horizontal distance of 2 feet (61 cm) from

the center line of the terminal

E =

Clearance to unventilated sofﬁ t

F =

Clearance to outside corner

G =

Clearance to inside corner

H =

Clearance to each side of center line extended above meter/regulator assembly

I =

Clearance to service regulator vent outlet 3 feet (1.83 m)

J =

Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other appliance

3 feet (91 cm) within a height 15 feet above the meter/regulator assembly

6 inches (15 cm) for appliances 10,000 Btuh (3 kW), 12 inches (30 cm) for appliances > 10,000 Btuh (3 kW) and

4 feet (1.2 m) below or to side of opening;

1 foot (300 mm) above opening

100,00 Btuh (30 kW), 36 inches (91 cm) for appliances >100,00 Btuh (30 kW)

K =

Clearance to a mechanical air supply inlet 6 feet (1.83 m) 3 feet (91 cm) above if within 10 feet

(3 m) horizontally

L =

Clearance above paved sidewalk or paved

7 feet (2.13 m) † 7 feet (2.13 m)

driveway located on public property

M =

Clearance under veranda, porch deck, or balcony

12 inches (30 cm) ‡

In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code

In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code

† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both

dwellings. ‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the ﬂ oor. * For clearances not speciﬁ ed in ANSI Z223.1 / NFPA 54 or CSA B149.1, one of the following statement shall be included:

“Clearance in accordance with local installation codes, and the requirements of the gas supplier and the

manufacturer’s installation instructions.”

Figure 20. Vent Termination Clearances for Other Than Direct Vent Furnaces

4. Insure the combustion air inlet pipe (for a 2 pipe installation) has a 90 degree termination elbow as shown in Figures 21 and 22.

Vent Configuration to Provide 12" Minimum height above Snow Level.

Outside Wall

12" Min. 19" Max.

Support

1/2" Armaflex Insulation or Equivalent (If Required)

12" Above Normally Expected Snow Level

Figure 21. Alternate Horizontal

Vent Installation

Note: A combustion air intake must be provided

with an elbow opening downward. The screen provided with the furnace must be installed in the elbow to prevent entry of debris or creatures.

When the vent pipe must exit an exterior wall close to the grade or expected snow level, a riser should be provided as shown in Figure 20.

Table 6 describes the maximum length of ﬂ ue pipe that can travel through an unconditioned space or an exterior space. The total vent length must not exceed the lengths noted on Table 5.

Vertical Venting

Figure 23 shows the proper installation and clearances for vertical vent termination. The roof penetration must be properly ﬂ ashed and waterproofed with a plumbing roof boot or equivalent ﬂ ashing. Termination spacing requirements from the roof and from each other must be per Figure 23.

Maximum Flue Pipe Length in

Unconditioned and Exterior Spaces

Winter Design

Termperature (°F)

20 45 70

020 70

-20 10 60

Without Insulation

(feet)

With Insulation

(feet) ‡

‡ = Insulation thickness greater than 3/8 inch, based on an

R value of 3.5 (ft*°F*hr)/(BTU*in)

Table 6. Vent Protection

Exhaust Vent

Option B

Mounting Kit

Faceplate Secured

to Wall with Screws

Combustion

Air Inlet

Exhaust Vent

Option C

18" Min. 36" Max.

7" Min.

18" min.

36" max.

18" Min. 36" Max.

12" Min. to

Normal Snow Level

Inlet

8" Min.

Exhaust Vent

Option A

Grade Level or Normal Snow

Exhaust

Figure 22. Exhaust and Combustion Air Pipe Clearances

Exhaust

Elbow

Vent

Combustion

Air

Intake

18" Min. 36" Max.

Exhaust

Plumbing Vent Roof Boot (Typ. Both Pipes)

A= 12” Above Roof or Snow Accumulation Level

Figure 23. Vertical Vent Termination

Vent and combustion air piping may be installed in an existing chimney which is not in use provided that:

a. Both the exhaust vent and air intake run

the length of the chimney.

b. The top of the chimney is sealed and

weatherproofed.

c. The termination clearances shown in

Figure 23 are maintained.

d. No other gas ﬁ red or fuel-burning equip-

ment is vented through the chimney.

Vent Freezing Protection

When the vent pipe is exposed to temperatures

Upﬂ ow Models

Collector Box

below freezing, i.e., when it passes through unheated spaces, chimneys, etc., the pipe must be insulated with 1/2 inch thick sponge rubber insulation, Armaﬂ ex-type insulation or equivalent. Insulating pipe is important to avoid condensate icing.

For extremely cold climates or for conditions of short furnace cycles (i.e. set back thermostat conditions) the last three feet of vent pipe can be reduced one nominal pipe size provided that the total vent length is at least 15 feet in length and the vent is sized in accordance with the venting requirements (Table 5) before this reduction is applied. (Example: 3” to 2-1/2” or 2” to 1-1/2”) Smaller vent pipes are less susceptible to freezing, but must not be excessively restrictive.

Downﬂ ow Models

Collector Box

Left Side

Drain

"HARD" J Drain Tube

Left

Rotate counter clockwise (Step 2)

Clamp (Loosen For Step 1) (Retighten for Step 3)

Route to floor drain. ...OR Route to condensate pump. Keep downward slope.

Side Drain

"HARD" J Drain Tube

Rotate clockwise

(Step 2)

Clamp (Loosen For Step 1) (Retighten for Step 3)

Figure 24. Furnace with Condensate Drain Trap Assembly

Route to floor drain. ...OR Route to condensate pump. Keep downward slope.

Concentric Vent Termination

Concentric vent termination kits are approved for use with these furnaces. The kit part numbers are 904176 (3 inch) and 904177 (2 inch). For proper installation of the concentric vent termination, follow the installation instructions provided with that kit.

Side Wall Vent Kit

This side wall vent kit is approved for use with these furnaces. The kit part number is 904347, and instructions for proper installation are provided with that kit.

DRAINAGE OF CONDENSATE FROM FURNACE

WARNING:

The condensate produced by the furnace must be drained. Do not connect a water supply to the drainage hose of the furnace.

maintains a downward slope from the unit to the drain. Refer to Figure 24 for more details.

For a right side drain simply extend the tubing out of the 7/8” hole in the cabinet, see Figure 21. For a left side drain follow the steps below:

1. Loosen the clamp on the soft exit tube (see Figure 24.)

2. Rotate the soft exit tube (counter clockwise, 180° upﬂ ow *RC models; clockwise 90° downﬂ ow *RL models.)

3. Re-tighten the clamp. MAKE SURE CLAMP IS TIGHT TO AVOID LEAKAGE OF CONDENSATE.

4. Route the tubing out of the 7/8” hole located 8 inches up from the bottom furnace.

The condensate should drain from the plastic collector box (location A in Figure 24) as droplets or a small stream. If you notice the furnace has operated for more than 5 minutes without draining or the red status light on the control board is pulsing a 2-blink code follow the steps below.

NOTE: The condensate drain should be protected from freezing when in unheated spaces.

The condensate drainage system is internal to the furnace. It is not recommended to connect additional traps to the exterior of the furnace. Doing so will have adverse effects on the operation of the furnace. The drain may exit either the right or left side of the furnace cabinet.

1. Remove the collector box soft tube at location A in Figure 24 and insure the exit from the collector box is clear of any debris or obstructions.

2. Replace this tube and insure the ﬁ t to the header spout is air tight. Air will be drawn into the header if this connection is not tight.

3. Check other tube connections along the drain system. Insure that all are air tight.

The condensate drain can be routed to a ﬂ ow drain or to a condensate pump. Ensure that the drain

Upﬂ ow Models Downﬂ ow Models

Burner Viewport

Denotes fieldprovided and installed components.

Assembly

Burner

Automatic Gas Valve (with manual shut-off)

Ground Joint Union

Roll-Out Limit

Shut-Off Valve

with 1/8" NPT

Plugged Tap

Some Utilities Require Shut-

Off Valve to

be 4 to 5 feet

Above Floor

Dripleg

Roll-Out Limit

Burner Assembly

Ground Joint Union

Automatic Gas Valve

(with manual shut-off)

Shut-Off Valve with 1/8" NPT Plugged Tap

Some Utilities Require ShutOff Valve to be 4 to 5 feet Above Floor

Dripleg

Burner Viewport

Figure 25. Typical Gas Service Connection

NOTE: Industry research studies indicate that when condensate is routed to an active drain, household detergents, etc., buffer its acidity. If the drain is not actively used or if codes require, obtain a neutralizer kit (usually contains limestone). Proper drains and connections to the condensate tubing are required as NORDYNE cannot be held responsible for water leakage which occurs due to loose hose connections or improperly sealed drain line pipes.

GAS SUPPLY AND PIPING

This furnace is equipped for either left or right side gas entry. Typical gas service hook-ups are shown in Figure 25. When making the gas connection provide clearance between the gas supply line and the entry hole in the furnace casing to avoid unwanted noise and/or damage to the furnace.

All gas piping must be installed in compliance with local codes and utility regulations. Some local regulations require the installation of a manual main shut-off valve and ground joint union external to the furnace. The shut-off valve should be readily accessible for service and/or emergency use. Consult the local utility or gas supplier for additional requirements regarding placement of the manual main gas shut-off. In the absence of local codes the gas line installation must comply with the latest edition of the National Fuel Gas Code (ANSI Z223.1) or (CAN/CGA B149) installation codes.

An 1/8” NPT plugged tap must be installed in the gas line to the unit for use when measuring the gas supply pressure. The plug should be readily accessible for service use. A drip leg should be installed in the vertical pipe run to the unit. Table 5 lists gas ﬂ ow capacities for standard pipe sizes as a function of length in typical applications based on nominal pressure drop in the line.

NOTE: Gas piping must not be run in or through air ducts, chimneys, gas vents, elevator shafts, etc.

Compounds used on threaded joints of gas piping must be resistant to the actions of liqueﬁ ed petroleum gases.

The main manual gas valve and main power disconnect to the furnace must be properly labeled by the installer in case emergency shutdown is required.

CAUTION:

Do not use matches, lighters, candles, or other sources of open ﬂ ame to check for gas leaks.

Leak Check

WARNING:

FIRE OR EXPLOSION HAZARD Failure to follow the safety warnings exactly could result in serious injury, death or property damage.

Never test for gas leaks with an open ﬂ ame. Use a commercially available soap solution made speciﬁ cally for the detection of leaks to check all connections. A ﬁ re or explosion may result causing property damage, personal injury or loss of life.

After the gas piping to the furnace is complete, all connections must be tested for gas leaks. To check for leaks use only a soap and water solution or other approved method.

IMPORTANT NOTE: When pressure testing gas supply lines at pressures greater than 1/2 psig (14 in. water column), the furnace must be disconnected from the gas supply piping system to prevent damage to the gas control valve. If the test pressure is less than or equal to 1/2 psig (14 in. water column), the furnace must be isolated from the gas supply line by closing the manual shut-off valve.

WARNING:

This furnace was equipped at the factory for use with natural gas only. A special kit, supplied by the manufacturer, is required to convert the furnace to operate on LP/propane gas. Failure to use the proper conversion kit can cause ﬁ re, explosion, property damage, carbon monoxide poisoning, personal injury, or death.

CAPACITY OF BLACK IRON GAS PIPE (CU. FT. PER HOUR)

FOR NATURAL GAS (SPECIFIC GRAVITY = 0.60)

NOMINAL

BLACK IRON

PIPE DIAMETER

10 20 30 40 50 60 70 80

1/2 130 90 75 65 55 50 45 40

3/4 280 190 150 130 115 105 95 90

1 520 350 285 245 215 195 180 170

1 1/4 1050 730 590 500 440 400 370 350

1 1/2 1600 1100 890 760 670 610 560 530

The cubic feet per hour listed in the table above must be greater than the cubic feet per hour of gas ﬂ ow required by the furnace. To determine the cubic feet per hour of gas ﬂ ow required by the furnace, divide the input rate of the furnace by the heating value of the gas:

Cubic Feet Per Hour Required = Input To Furnace (Btu/hr) Heating Value of Gas (Btu/Cu. Ft.)

Table 7. Capacity of Black Iron Gas Pipe (cu. ft. per hour)

for Natural Gas (speciﬁ c gravity = .60)

0-1,999 2,000-4,999 5,000-5,999 6,000-7,999 8,000-10,000

NATURAL GAS

ORIFICE SIZE 45 45 45 45

LENGTH OF PIPE RUN

(feet)

ELEVATION (FEET ABOVE SEA LEVEL)

See

Table 11

MAN. PRESSURE

(IN W.C.)

LP/PROPANE GAS

‡ = Based on heating value from 900 to 999 BTUH. For heating values less than 900 BTUH multiply manifold pressure by 1.1 for corrected pressure. For heating values greater than 1,000 BTUH, multiply manifold pressure by 0.9 for corrected pressure.

ORIFICE SIZE 55 55 56 56

MAN. PRESSURE

(IN W.C.)

3.5 3.5 3.5 ‡ 3.2 ‡ 2.8 ‡

Table 11

10.0 8.5 10.0 9.0 8.5

Table 8. Manifold Pressure (in WC) for Natural Gas at Various Altitudes

Furnace Rating Oriﬁ ce Drill Size Furnace Rating Oriﬁ ce Drill Size

Plate Input (Btu/h) Nat. LP Plate Input (Btu/h) Nat. LP

40,000 45 55 40,000 45 56

60,000 45 55 60,000 45 56

80,000 45 55 80,000 45 56

See

100,000 45 55 100,000 45 56

120,000 45 55 120,000 46 56

Table 10. Natural and LP Gas Oriﬁ ce Sizes

for Elevations between zero and

4999 ft. Above Sea Level

Table 11. Natural and LP gas Oriﬁ ce Sizes for Elevations between 5000 and 10,000 ft.

Above Sea Level

Conversion

Conversion of this furnace to use LP/propane gas must be made by qualiﬁ ed service personnel, using only approved parts.

High Altitude Application

High altitude application with this furnace can be ﬁ eld performed by a simple adjustment of manifold pressure, and if necessary changing the oriﬁ ces. The changes required depend on the installation altitude and the heating value of the gas. The gas heating value based on sea level can be obtained from your local gas utility. The heating value of gas at high altitude is always lower than the sea level heating value. The heating values used in Tables 8 & 9 are based on sea level values.

NOx furnace from Natural gas to LP/propane gas, it is necessary to remove the NOx Bafﬂ es from the furnace.

Conversion of this furnace to utilize LP/propane gas must be made by qualiﬁ ed service personnel, using factory authorized or approved parts. Conversion to LP/propane gas can be accomplished by ﬁ rst replacing the natural gas oriﬁ ces with the appropriate LP/propane oriﬁ ces shown in Table 10 or 11. Note: for installations between zero and 5000 ft. above sea level, a #54 or #55 drill size oriﬁ ce should be used depending upon the rated ﬁ ring rate of the unit (see Table 10 or

11). However for installations above 5000 ft. above sea level, a # 55 or #56 drill size oriﬁ ce should be used. After changing the oriﬁ ces, use Table 9 to determine the appropriate manifold pressure for your installation.

Natural Gas High Altitude Conversion

All factory shipped furnaces are ready to operate between zero and 4999 ft. above sea level. For higher altitudes (between 5000 and 10,000 ft. above sea level), conversion can be achieved simply by adjusting the furnace manifold pres-

sure as shown in Table 8.

LP/Propane Gas Sea Level and High Altitude Conversion

IMPORTANT NOTE: When converting a low

Furnace Cabinet Nominal Maximum Minimum Maximum on Minimum Maximum on

Input Width Electrical Operating Operating Furnace Wire Fuse or Circuit

(Btuh) (in.) Supply Voltage Voltage Amperes Gauge Breaker Amps*

40,000 14.25 115-60-1 127 103 7.8 14 15

60,000 14.25 115-60-1 127 103 7.8 14 15

80,000 19.75 115-60-1 127 103 9.7 14 15

Conversion to LP/propane, sea level, and high altitude is detailed in the installation instructions provided with the conversion kit. Approved conversion kits are listed below.

United States LP/Propane Gas Sea Level and High Altitude Conversion Kit - P/N 904090A

This kit is for LP/propane conversion in the United States at altitudes between zero and 10,000 ft. above sea level. Follow the installation instructions supplied with the kit for proper installation.

100,000 19.75 115-60-1 127 103 9.7 14 15

120,000 22.50 115-60-1 127 103 12.9 12 20

* Time-delay fuses or HACR-type circuit breakers are required.

Thermostat

Wire

Gauge

Recommended Maximum Thermostat

Wire Length

2-wire 4 or 5-wire

(heating) (cooling)

24 55 ft. 25 ft. 22 90 ft. 45 ft. 20 140 ft. 70 ft. 18 225 ft. 110 ft.

Table 12. Electrical Data

Field Supplied

Fused Service

Panel

Black (Hot)

White (Neutral)

Green or Bare

(Ground)

Field Supplied

Panel Connector

Black White

Ground

Field Supplied Disconnect Within Sight of Furnace

Black White

Ground

Black

White

Figure 26. Line Voltage Field Wiring

Field Line Voltage Wiring

Factory Line Voltage Wiring

Ground

Junction Box (may be internal or external to the furnace). These connections can be made in the field supplied disconnect at the furnace.

Canadian LP/Propane Gas Sea Level and High Altitude Conversion Kit - P/N 904091A

This kit is for LP/propane conversions in Canada at altitudes between zero and 4500 ft. above sea level. Follow the installation instructions supplied

with the kit for proper installation.

CAUTION:

To avoid electric shock, personal injury, or death, turn off the power at the disconnect or the main service panel before making any electrical connections.

ELECTRICAL WIRING

Electrical connections must be made in accordance with all applicable local codes and ordinances, and with the current revision of the National Electric Code (ANSI/NFPA 70).

For Canadian installations electrical connections and grounding must be done in accordance with the current Canadian Electrical Code (CSA C22.1 Part 1) and/or local codes. If any of the original wire as supplied with the furnace must be replaced, it must be replaced with wire having a minimum temperature rating of 105°C. Refer to the furnace nameplate and Table 12 for electrical requirements.

Line Voltage Wiring

The line voltage (115 volt) to the furnace must be supplied from a dedicated branch circuit containing the correct fuse or circuit breaker for the furnace. See Table 12. An electrical switch should be readily accessible from and within sight of the furnace. (See the Wiring Diagram label in the furnace and Figure 26.)

The furnace cabinet must have an uninterrupted, unbroken ground to minimize injury should an electrical fault condition occur. The controls used in this furnace require an earth ground to operate properly. Acceptable methods for grounding are electrical wire or conduit approved for electrical ground service. Do not use gas piping as an electrical ground.

NOTE: Proper line voltage polarity must be maintained in order for the control system to operate correctly. Verify that the incoming neutral line is connected to the white wire and the incoming “hot” line is connected to the black wire in the junction box. These furnaces will not operate unless polarity and ground are properly connected. See Figure 23.

CAUTION:

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

Low Voltage Wiring

Install the thermostat per the manufacturer’s instructions. The low voltage (24 volt) connections from the thermostat are made at the terminal strip on the control board in the furnace. See Figure 24 for the proper connections for heating only (two-wire) and heating/cooling (four-wire) applications. The recommended minimum wire gauge for thermostat wiring is shown in Table 12.

The thermostat must not be installed on an outside wall or any other location where its operation may be adversely affected. Adverse affects include radiant loading from ﬁ replaces, sunlight, or lighting ﬁ xtures, and convective loading from warm air registers or electrical appliances.

To check the heat anticipator setting either:

1. Add the current draw of the system components; or

2. Measure the current ﬂ ow on the thermostat R-W circuit after the circulating blower motor has started.

Set the heat anticipator according to the thermostat manufacturer’s instructions for heat anticipator settings.

Verifying and Adjusting Firing Rate

The ﬁ ring rate must be veriﬁ ed for each installation to prevent over-ﬁ ring the furnace.

NOTE: The ﬁ ring rate must not exceed the rate shown on the furnace rating plate. At altitudes above 2000 ft. the ﬁ ring rate must be adjusted as described in the high altitude section.

START-UP AND ADJUSTMENTS

Prior to start-up, verify that:

1. The line voltage power leads are securely connected, that the polarity of the connections is correct, and that the furnace is properly grounded.

2. The thermostat wires (R, W, Y, and G) are securely connected to the correct leads on the terminal strip of the circuit board.

3. The gas line service pressure does not exceed 10.0 in. water column (0.36 psig), and is not less than 4.5 in. water column (0.16 psig) for natural gas. For LP gas the line service pressure must not exceed 14 in. water column (0.51 psig), and must not be less than 11.0 in. W.C. (0.40 psig).

4. The roll-out and vent safety manual reset switches are closed. If necessary, press the red button to reset a switch. See Figure 30 for location. DO NOT install a jumper wire across a switch to defeat its function. If a switch reopens on start-up, DO NOT reset the switch without identifying and correcting the fault condition which caused the switch to trip.

5. The blower door is in place, closing the door switch in the line voltage circuit.

6. The gas line has been purged and all connections are leak tight.

Start-Up Procedure

1. Set the thermostat to the lowest setting.

2. Close the disconnect(s) to provide line voltage to the furnace.

3. Follow the procedures given on the operating instructions label attached to the furnace.

4. Set the thermostat above room temperature and verify the sequence of operation. (See the SEQUENCE OF OPERATION.)

5. After the furnace has run for approximately ﬁ ve minutes, set the thermostat below room temperature and verify steps (9) through (11) of the SEQUENCE OF OPERATION.

Use the following procedure to determine the ﬁ ring rate:

1. Shut off all other gas ﬁ red appliances.

2. Start the furnace and allow it to run for at least three minutes.

3. Measure the time (in seconds) required for the gas meter to complete one revolution.

4. Convert the time per revolution to cubic feet of gas per hour using Table 13.

5. Multiply the gas ﬂ ow rate in cubic feet per hour by the heating value of the gas in Btu per cubic foot to obtain the ﬁ ring rate in Btuh. Example:

• Time for 1 revolution of a gas meter with

a 1 cubic foot dial = 40 seconds.

• From Table 9 read 90 cubic feet per hour

of gas.

• Heating value of the gas (obtained

from gas supplier) = 1040 Btu per cubic foot.

• Firing rate = 1040 x 90 = 93,600 Btuh.

A/C Condensing Unit

Condensing Unit

Control Box

R Y G W

Connect

R & W

For

Heating

Only

Room

Thermostat

NOTE: The "Y" terminal on the UTEC control board must be connected to the thermostat for proper cooling mode operation.

FIELD WIRING

Low Voltage Connections

R C Y G W

COM

3 Amp

24 V

EAC

HUM

Neutrals

Unused Motor Leads

HUM

63 52 41

Blower Off

Fuse

Flame Signal Light

Status Light

HEAT

M1M2M3

Timing

(Yellow)

(Red)

COOL

EAC

XFMR

6090120

TWIN

180

Figure 27. Low Voltage Field,

Four-wire Heating/Cooling Applications

6. Adjustments to the ﬁ ring rate can be made

by adjusting the gas manifold pressure. See the High Altitude Application section for additional information of ﬁ ring rate at elevations above 2000 ft.

The manifold pressure must be set to the appropriate value for your installation. Refer to either Table 8 for natural gas or Table 9 for LP/propane gas to verify the manifold pressure setting required for your particular installation. To adjust the manifold pressure, remove the regulator cap and turn the adjusting screw clockwise to increase pressure or counterclockwise to reduce pressure. Replace the regulator cap after adjustments are complete.

CAUTION:

Do not re-drill the burner oriﬁ ces. If the oriﬁ ce size must be changed, use only new oriﬁ ces.

Verifying and Adjusting Temperature Rise

Verify that the temperature rise through the furnace is within the range speciﬁ ed on the furnace rating plate. Temperature rises outside the speciﬁ ed range could result in premature heat exchanger failure.

Place thermometers in the return and supply air stream as close to the furnace as possible. The thermometer on the supply air side must be shielded from direct radiation from the heat exchanger to avoid false readings. Adjust all registers and duct dampers to the desired position and run the furnace for ﬁ fteen minutes before taking any temperature readings. The temperature rise is the difference between the supply and return air temperatures.

For typical duct systems, the temperature rise will fall within the range speciﬁ ed on the rating plate with the blower speed at the factory recommended setting. If the temperature rise measured is outside the range speciﬁ ed, it may be necessary to change the blower speed. Lower blower speeds will increase the temperature rise and higher blower speeds will decrease the temperature rise.

The furnace is equipped with a multispeed motor. Heating and cooling speed selection is made by moving the leads on the integrated control board located in the furnace. The wiring diagram on the furnace and Figures 27, 28 and 29 show the speed taps for adjusting motor speed.

If it is desired that the blower operate at the same speed for heating and cooling, tape off the terminal of the unused blower wire. Install the jumper wire, found in the plastic instruction bag, across the HEAT and COOL taps on the

COM

24 V

Neutrals

3 Amp Fuse

Unused Motor

Leads

M1M2M3

HUM

Heating

Speed Tap

Common

Leads

Connect

Neutral

Lead of

Electronic

Air Cleaner

and/or Humidifier

Here.

R C Y G W

EAC

HUM

Humidifier Tap

(.5A@ 120 VAC)

Figure 28. Blower Speed Tap Location

Flame Signal Light (Yellow)

Status

Light (Red)

COOL

HEAT

EAC

Cooling Speed Ta

XFMR

Electronic Air Tap

(.5A@ 120 VAC)

TIME FOR

ONE REVOLUTION

(SECONDS)

24 150 750 1500 80 45 225 450 26 138 692 1385 82 44 220 439 28 129 643 1286 84 43 214 429 30 120 600 1200 86 42 209 419 32 113 563 1125 88 41 205 409 34 106 529 1059 90 40 200 400 36 100 500 1000 92 39 196 391 38 95 474 947 94 38 191 383 40 90 450 900 96 38 188 375 42 86 429 857 98 37 184 367 44 82 409 818 100 36 180 360 46 78 391 783 102 35 176 353 48 75 375 750 104 35 173 346 50 72 360 720 106 34 170 340 52 69 346 692 108 33 167 333 54 67 333 667 110 33 164 327 56 64 321 643 112 32 161 321 58 62 310 621 114 32 158 316 60 60 300 600 116 31 155 310 62 58 290 581 118 31 153 305 64 56 281 563 120 30 150 300

GAS FLOW RATE (CUBIC FEET PER HOUR)

CUBIC FEET PER REVOLUTION OF

METER

1 5 10 1 5 10

TIME FOR

ONE REVOLUTION

(SECONDS)

CUBIC FEET PER REVOLUTION OF

METER

Table 13. Gas Flow Rate

control board. Reconnect the desired blower tap to the piggyback quick connect.

The blower control is designed to start the circulating air blower 30 seconds after the gas valve is opened. The blower control is factory wired to turn the blower motor off 120 seconds after the gas valve is closed. This timing can be changed using the BLOWER OFF timing switch opposite the terminal block on the control board. (See Figure 28.)

Verifying Burner Operation

To verify operation of the burners, make sure that the blower compartment door is in place and that there is power to the furnace. Set the thermostat above room temperature and observe the ignition sequence. The ﬂ ame can be observed through the small clear window on the burner box. The burner ﬂ ame should carry over between all burners. The ﬂ ames should be blue, without yellow tips. Flames should extend from each burner without lifting, curling, or ﬂ oating. After verifying ignition, set the thermostat below room temperature and verify that the burner ﬂ ame extinguishes completely.

a close-off plate in place of or upstream of the ﬁ lter(s). Set the thermostat above room temperature and verify that the Sequence of Operation is as described in these instructions. The supply air limit switch should function to turn off the gas valve within approximately ﬁ ve minutes. The circulating air and combustion blowers should continue to run when the supply air limit switch opens. Remove the close-off plate immediately after the supply air limit switch opens. If the furnace operates for more than ﬁ ve minutes with no return air, set the thermostat below room temperature, shut off the power to the furnace, and replace the supply air limit switch.

DESCRIPTION OF COMPONENTS

Figure 28 shows the location of each of the functional components described below. If any component of the furnace must be replaced, use only factory authorized replacement parts. See the Replacement Parts List for each component.

Flame Sensor – The ﬂ ame sensor acts to prove that ﬂ ame has carried over from the igniter to the opposite end burner. If no ﬂ ame is sensed, the furnace will be shut down automatically.

Verifying Operation of the Supply Air Limit Switch

To verify operation of the supply air limit switch, make sure that the blower door is in place and that there is power to the furnace. Completely block the return airﬂ ow to the furnace by installing

Gas Valve – The gas valve controls the ﬂ ow of gas to the burners. When the gas valve is energized it automatically opens and regulates the gas pressure in the manifold.

Pressure Switch – The pressure switch veriﬁ es that the inducer is drawing the combustion gases

through the heat exchanger. It also senses a blocked condensate drain condition.

Vent Pressure Switch – The vent pressure switch reacts to blockage in the vent or combustion air piping.

Supply Air Limit Switch – The supply air limit switch prevents the air temperature leaving the furnace from exceeding the maximum outlet air temperature.

Vent Safety Switch – The vent safety switch shuts the furnace down if the outlet ﬂ ue gas temperature increases above 160°F. This switch protects the plastic ﬂ ue system and the inducer from over-temperature conditions.

Flame Roll-Out Switch – This switch provides ﬂ ame roll-out protection to the furnace and combustion air inlet pipe.

MAINTENANCE

It is recommended that the furnace be checked yearly. At a minimum, this check should include the following items.

WARNING:

To avoid electric shock, personal injury, or death, disconnect the electric power before performing any maintenance.

Combustion Air and Vent System

Check the combustion air and vent pipe to ensure that it is not damaged, corroded or blocked by debris. Any damaged section of vent pipe must be replaced, and any obstruction or blockage must be removed prior to operating the furnace.

Air Filter(s)

WARNING:

Never operate the furnace without a ﬁ lter in place. Dust and lint in the return air can build up on internal components, resulting in loss of efﬁ ciency, equipment damage, and possible ﬁ re.

AIR FILTER(S) ARE NOT SUPPLIED WITH THE FURNACE AS SHIPPED FROM THE FACTORY. FILTERS FOR SIDE RETURN AND BOTTOM RETURN APPLICATIONS ARE AVAILABLE FROM YOUR LOCAL DISTRIBUTORS.

The installer should provide a ﬁ lter rack for a high velocity type ﬁ lter in the return air duct adjacent to the furnace. Filters should be changed or cleaned monthly during the heating season. New or newly renovated homes may require more frequent changing until the construction dust has been removed.

WARNING:

Holes in the vent pipe or heat exchanger can cause products of combustion to enter the home. Replace the vent pipe or heat exchanger if leaks are found. Failure to prevent products of combustion from being circulated into the living space can create potentially hazardous conditions including carbon monoxide poisoning that could result in personal injury or death.

Lubrication

The bearings in the circulating air blower motors are pre-lubricated and sealed at the factory. No further oiling of the bearings is required for the life of the motor.

Condensate Drain Assembly

Be sure the condensate lines are free and open (i.e. avoid kinking hoses). Also make sure all hose clamps are tight to avoid drawing air into the system.

Blower Compartment

The blower compartment should be cleaned monthly during the heating and cooling seasons

For Upﬂ ow and Downﬂ ow Residential Furnaces

FLAME

ROLL-OUT SWITCH

(SELECT

MODELS ONLY)

FLAME SENSOR

BLUE

DECK SWITCH

MODELS ONLY)

WHITE (NEUTRAL)

ROOM THERMOSTAT

AIR CONDITIONER CONDENSING UNIT

BLOWER

(SELECT

BLACK 120V

GROUND

GAS

VALVE

BLUE

SUPPLY AIR LIMIT SWITCH (ALL MODELS)

BLUE

FLAME ROLL-OUT

BLUE

SWITCH

(ALL MODELS)

ORANGE

BLUE

VENT

SAFETY SWITCH

(SELECT

MODELS ONLY)

WHITE

GREEN

WHITE W/ BLK STRIPES

BLK W/ WHITE STRIPES

BLACK

TRANSFORMER

24 V

PRESSURE

SWITCH

WHITE

120 V

BLACK

180

120

Refer to the Installation Instructions provided

BLACK

with the furnace for the

VENT

PRESSURE SWITCH

(93+ MODELS ONLY)

BLOWER DOOR SWITCH

VENT SAFETY SWITCH (SELECT MODELS ONLY)

proper heating and cooling speeds for your application.

RED

YELLOW BROWN

3 OR 4 SPEED MOTOR

IGNITOR

Legend

Field Wiring

Factory Wiring:

Low Voltage High Voltage

FAULT CONDITION

Power On

Limit Circuit Open or External Load On "W"

Pressure Switch is Open with Inducer On

Pressure Switch is Closed with Inducer Off

Ignition Failure (Check Ground)

115 VAC & Neutral Reversed or no Ground

False Flame or Gas Valve Relay Shorted Power Off

FAULT CONDITION Low Flame Sensor Signal

Flame Present

INDUCER

BLACK

STATUS

RED

LIGHT

1 FLASH

2 FLASHES

3 FLASHES

4 FLASHES

5 FLASHES

Continuous

OFF

FLAME

YELLOW

LIGHT

Continuous

Flash

WHITE

RED

ORANGE

BLUE

BLACK

WHITE

MOTOR

PLUG

These wires are

not present

on all models

If any of the original wire as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature rating of at least 105 C.

WD# 710355-0

RED

ORANGE

BLUE

BLACK

Figure 29. Upﬂ ow and Downﬂ ow Wiring Diagram

Upﬂ ow Furnace Models

1 Igniter (Not Shown) 2 Flame Sensor (Not

Shown) 3 Gas Valve 4 Flame Roll-out Switch(s) 5 Pressure Switch 6 Vent Pressure Switch (Not Shown) 7 Control Board 8 Blower Door

Switch

9 Vent Safety Switch

10 Low Voltage Transformer 11 Supply Air Limit

Switch 12 Circulating Air Blower Assembly13 Induced Draft Blower 14 Condensate Drain Tube 15 In-Line Drain Assembly 16 Burner View Port 17 Front Header Box 18 Combustion Air Intake 19 Exhaust Vent

Downﬂ ow Furnace Models

1 Igniter (Not Shown) 2 Flame Sensor (Not

Shown) 3 Gas Valve 4 Flame Roll-out

Switch(s) 5 Pressure Switch 7 Control Board 8 Blower Door

Switch

9 Vent Safety Switch

10 Low Voltage Transformer 11 Supply Air Limit

Switch 12 Circulating Air Blower Assembly13 Induced Draft Blower 14 Condensate Drain Tube 15 In-Line Drain Assembly 16 Burner View Port 17 Front Header Box 18 Combustion Air Intake 19 Exhaust Vent

Figure 30. Location of Major Components

to remove any dirt and lint that may have accumulated in the compartment or on the blower and motor. Dirt and lint can create excessive loads on the motor resulting in higher than normal operating temperatures and shortened service life.

Heat Exchanger and Burner Maintenance

The furnace should operate for many years without excessive soot buildup in the ﬂ ue passageways, however, the ﬂ ue passageways, the vent system, and the burners should be inspected and cleaned (if required) by a qualiﬁ ed serviceman annually to ensure continued safe operation. Particular attention must be given to identify deterioration from corrosion or other sources.

SYSTEM OPERATION INFORMATION

Proper maintenance is most important to achieve the best performance from a furnace. Follow these instructions for years of safe, trouble free operation.

• Do not place combustible materials on or against the furnace cabinet or the vent pipe.

• Do not store gasoline or any other ﬂ ammable vapors and liquids in the vicinity of the furnace.

• Change or replace the air ﬁ lters monthly during any period when the circulating blower is operating regularly.

• Always replace the doors on the furnace after servicing. Do not operate the furnace without all doors and covers in place.

• Avoid operating the furnace when windows and doors are open.

• Be sure that the thermostat is properly installed and is not being affected by drafts or heat from lamps or other appliances.

Sequence of Operation

Operating sequences for the heating, cooling, and fan modes are described below. Refer to the wiring diagrams (Figures 29) and the voltage ﬁ eld wiring diagram (Figure 26).

Heating Mode:

1. On a call for heat the thermostat closes, applying 24 VAC to the W terminal on the control board.

2. The control board checks for continuity on the 24 VAC limit control circuit (over-temperature limit switch, ﬂ ame rollout switches and blocked vent switch in series). If an open limit is detected the control board will energize the inducer and the conditioned air blower. All other system functions will be inoperable until the limit circuit closes. While the limit is open, the red LED will pulse at a rate of 1 blink per unit time.

3. The furnace control checks for continuity across the pressure switch (24 VAC). If the pressure switch is closed the heat mode sequence will not continue. If it remains closed for 10 seconds the red LED will blink 3 times repetitively until the fault condition clears.

4. The inducer is energized.

5. The pressure switch will close. If the pressure switch does not close after 10 seconds the fault LED will blink 2 times repetitively and the inducer will continue to run until the switch is closed.

6. The inducer will pre-purge for 30 seconds and then the igniter will start its warm-up as follows:

Initial Power up: After 30 seconds of igniter

warm-up the gas valve (24 VAC) will then open. The igniter circuit will stay energized for 3 seconds after the gas valve opens.

After Initial Power up: The control has a

programmed adaptive ignition feature which varies the warm-up period as follows: If ignition is successful the warm-up is reduced by 3-seconds on each subsequent call for heat until ignition failure occurs. Upon ignition failure, the warm-up is increased by 3-seconds on the next try. If successful, the timing remains ﬁ xed at this level. In general, whenever ignition failure occurs the warm-up interval is increased by 3-seconds on the next try. And if successful, it remains there. Minimum and maximum warm-up time limits are set at 6 and 54-seconds, respectively.

7. The furnace control must prove ﬂ ame via the ﬂ ame the ﬂ ame sensor 5 seconds after the gas valve opens. If ﬂ ame is sensed, all burners are on and the igniter cools off. If no ﬂ ame is sensed, the gas valve closes immediately and the inducer continues to run.

A second trial for ignition (step 6) begins if no ﬂ ame is sensed. On the ﬁ fth try for ignition, the furnace control is locked out and the red LED will blink 4 times repetitively. The thermostat must be opened for at least ten seconds to reset the furnace control after a lock out. Otherwise, the furnace will attempt another ignition sequence in 1 hour.

8. The furnace control energizes the circulating air blower on the heating speed 30 seconds after the gas valve circuit is energized .

9. When the thermostat has been satisﬁ ed, gas valve is de-energized.

10. The inducer is de-energized after a 30 second postpurge.

11. The furnace control keeps the circulating air blower energized for 120 seconds (factory set) or 60, 90, or 180 seconds (ﬁ eld adjustable). (See Figure 27.)

12. Abnormal conditions: If a limit opens during operation, the inducer and circulating air blower continue to operate. The gas valve is de-energized immediately. The blowers continue to operate until the limit closes. When the limit closes the inducer blower is de-energized immediately. The circulating air blower continues to operate for the speciﬁ ed delay (factory set at 120 seconds).

Fan Mode:

1. On a call for fan operation, the thermostat applies 24 VAC to the G terminal on the furnace control board.

2. The circulating air blower is energized immediately on the heating speed.

3. If the furnace is operated in the continuous ON position at the thermostat and is then switched to AUTO, the circulating blower will operate for a speciﬁ ed delay (factory set at 120 seconds).

Furnace Fails to Operate

If the furnace does not operate check the following:

1. Is the thermostat operating properly?

2. Are the blower compartment door(s) in place?

3. Is the furnace disconnect closed?

4. Has the circuit breaker tripped or the control board fuse burned open?

5. Is the gas turned on?

6. Are any manual reset switches open?

7. Is the ﬁ lter dirty or plugged?

8. Is the ﬂ ame sensor coated? (Remove and clean with emery cloth.)

Cooling Mode:

1. On a call for cooling the thermostat closes, applying 24 VAC to the G and Y terminals on the furnace control. This closes the compressor contactor.

2. The furnace control energizes the circulating blower (115 VAC) on the cooling speed.

3. When the thermostat is satisﬁ ed, the G and Y terminals on the control board are de-energized opening the compressor contactor.

4. The circulating air blower is de-energized after a 90 second delay.

Thermostat W G Y R

A/C Unit

R C

Twin

Y G

Terminal

R C

Twin

Y G

Terminal

Figure 31. Twinning

If the furnace locks out after 5 attempts for ignition, it will try again every hour if a call for heat remains. If the inducer and circulating air blowers are operating, and items 1 through 8 have been checked, press the red reset button on the vent safety switch. (See Figure 30.) If the furnace operates after depressing the reset button, contact a qualiﬁ ed serviceman to identify and repair the problem.

If the furnace continues to not operate, depress the red reset buttons on the ﬂ ame rollout switches. (See Figure 30.) If the furnace operates after depressing the reset buttons, contact a qualiﬁ ed servicemen to identify and repair the problem.

Twinning of Two Furnaces

The control board on these furnaces is capable of being twinned to another furnace of the same series, provided the circuit boards are both UTEC type. If using UTEC control boards, leave the fuses installed on each board. The thermostat wires and the 1/4 inch quick-connect terminals marked “TWIN” on the furnace controls must be connected together for twinning. (See Figure 31.)

INSTALLATION/PERFORMANCE CHECK LIST

LOCATION ____________________________ CITY _____________________STATE _______

INSTALLER ___________________________ CITY _____________________STATE _______

UNIT MODEL # ________________________UNIT SERIAL # __________________________

Minimum Clearances per Table 3? _________

Electrical Connections tight? ______________

Line Voltage Polarity correct? _____________

Supply Voltage: ____________________ Volts

Blower Motor HP: _______________________

FUEL TYPE:

Natural Gas _______ LP/Propane _________

Gas Piping Connections leak-tested? _______

Gas Line Pressure: _____________________ (in. water column, with furnace operating)

Manifold Pressure: ______________________ (in. water column, with furnace operating)

Is there adequate fresh air supply for combustion and ventilation? ______________

Furnace Input: __________________ (Btuh)

Supply Air Temperature: ____________ (° F)

Return Air Temperature:_____________ (° F)

Temperature Rise: _________________ (° F)

Are Flue Connections tight? ______________

Is there Proper Draft? ___________________

Is Vent free from restrictions? _____________

Is the Filter(s) secured in place? ___________

Is the Filter(s) clean? ____________________

Has the Thermostat been calibrated? _______

Is the Thermostat level? _________________

Is the Heat Anticipator Setting correct? ______

Has the Owner’s Information been reviewed with the homeowner? _______________________

Has the Literature Package been left near the furnace? _____________________________

O’Fallon, MO

¢708503¨¤

7085030

7085030 (Replaces 7084260)

Speciﬁ cations and illustrations subject to change without notice and without incurring obligations.

Printed in U.S.A. (10/05)

Nordyne RL 90+, RC 92+ User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual