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Figure 17

Figure 17.

Narrow Ducts - Option 2

Narrow

Duct

Finger Tabbed

Duct Connector

Secure finger tabs to

side of air duct with staples

or sheet metal screws

Bend tabs tightly

against supply air duct

Supply Air Duct

Cut out & remove

Installing Screw-Down Duct Connectors

1. Bend both tabs (

Figure 18

) on the mounting plate up

90°.

2. Apply a bead of caulking, mastic, or other approved

sealant around bottom side of 1/2” flange and restrictor
plate (when applicable).

3. Locate the screw down duct connector over the duct

and carefully lower it into place. See

Figure 18

4. Secure the duct connector to the floor using flat head

screws or nails. NOTE: Make sure the duct connector
flanges stay in contact with the duct.

5. Secure the plenum to the duct using sheet metal screws

making sure a tight seal is made between the duct and
the duct connector. NOTE: Additional screws may be
added if required.

6. Cut away along edge of flange allowing the center to

drop into the duct. NOTE: Remove section of duct with
caution, as edges will be sharp.

Figure 21

Figure 21.

Attachment Bracket

Attachment

Bracket

Furnace

A/C Coil Box

Figure 19

Figure 19.

Close-Off Plate

Figure 18

Mounting
Plate

Screw Down

Duct Connector

Supply

Air Duct

Hole for

Gas Line

Wood Floor

Bend tabs

up 90°

Figure 18.

Screw-Down Duct Connector

Figure 20

Figure 20.

A/C Coil Box Installation

DO NO

T INST

ALL SCREWS

THIS SURF

Coil Box

Supply

Air Duct

2 Screws

both sides

Wood

Floor

Installing the Downflow Furnace

1. Prepare the AC coil box for installation by removing 2

screws from the sides of the A/C coil box.

2. Install the close-off plate on the bottom of the of the coil

box. See

Figure 19

3. Align the screw holes in the close off plate and the coil

box. Secure both components with the screws removed
in step 1.

4. Place the A/C coil box on the duct connector until the

back side butts firmly against the mounting plate tabs.
NOTE: Mounting plate tabs must be bent upwards as
shown in

Figure 14 (page 17)

to prevent interference

with furnace.

5. Secure the A/C coil box to the connector assembly

and wood floor with appropriate size screws at all four
corners. NOTE: To minimize coil box damage, see

Figure

for appropriate screw locations.

6. Install the furnace on top of the A/C coil box. Align the

furnace evenly on the coil box from front to back and
side to side.

7. Secure the furnace to the A/C coil box with an attachment

bracket on both sides of the furnace. NOTE: The
attachment brackets must be evenly positioned over the
seam between the A/C coil box and the furnace. Install
4 self drilling screws in each bracket. See

Figure 21

Содержание M4RC-072D-35C

Страница 1: ...department RISQUE D INCENDIE OU D EXPLOSION Le non respect des avertissements de s curit pourrait entra ner des blessures graves la mort ou des dommages mat riels L installation et l entretien doivent...

Страница 2: ...loor Openings 16 Installing Finger Tabbed Duct Connectors 16 Narrow Duct Attachment Option 1 17 Narrow Duct Attachment Option 2 17 Installing Screw Down Duct Connectors 18 Installing the Downflow Furn...

Страница 3: ...rovide adequate combustion and ventilation air to the furnace space as specified on pages 6 9 Provide adequate clearances around the vent air intake terminal as specified in Figure 7 page 11 Figure 8...

Страница 4: ...mestic 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 satisfied a A CO detector and alarm shal...

Страница 5: ...Electrical Code NEC ANSI NFPA 70 CANADA Canadian Electrical Code CSA C22 1 Gas Piping Gas Pipe Pressure Testing Current edition of the NFGC and the NFPA 90B For copies contact the National Fire Prote...

Страница 6: ...QUE D EMPOISONNEMENT AU MONOXYDE DE CARBONED Le non respect des consignes suivantes portant sur chacun des appareils raccord s au syst me d vacuation mis en service pourrait entra ner l empoisennement...

Страница 7: ...htly sealed to the furnace The required sizing of these openings is determined by whetherinsideoroutsideairisusedtosupportcombustion the method by which the air is brought to the space and by the tota...

Страница 8: ...ustion Air Drawn from Inside Total Input Rating Btuh Minimum Free Area Each Opening Round Duct Diameter 40 000 100 sq In 12 inches 60 000 100 sq In 12 inches 80 000 100 sq In 12 inches 100 000 100 sq...

Страница 9: ...ntly adopted by the NFGC uses one opening within 12 inches of the top of the space This method may be used if it is acceptable to the local codes The following conditions must be met 1 The opening mus...

Страница 10: ...onofthefurnacecombustionsystem See list of substances on page 4 Route piping as direct as possible between the furnace and the outdoors Horizontal piping from inducer to the flue pipe must be sloped 1...

Страница 11: ...rotection see page 12 Figure 7 12 min to maximum expected snow level both pipes 90 Elbow Exhaust vent option B Exhaust vent option A Mounting kit faceplate secured to wall with screws both pipes Combu...

Страница 12: ...exposed to temperatures 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 Armaflex type insulation or equiv...

Страница 13: ...ponsible for water leakage which occurs due to loose hose connections or improperly sealed drain line pipes CIRCULATING AIR REQUIREMENTS WARNING Do not allow combustion products to enter the circulati...

Страница 14: ...in2 The total free area of openings in the floor or ceiling registers serving the return air duct system must be at least 352 in2 At least one register should be located where it is not likely to be c...

Страница 15: ...and other documents supplied with the furnace and or optional air conditioningequipment Unlessitisnoteddifferentlyinthis manual onlyusefactoryauthorizedkitsandaccessorieson thisappliance Refertolocala...

Страница 16: ...4 210 901991A 904012 10 1 4 260 901992A 904013 12 1 4 311 901993A 904014 NOTE Dimensions shown as Inches Millimeter Table 3 Duct Connector Sizes X FLOOR OPENING FLOOR CAVITY SUPPLY AIR DUCT Locating...

Страница 17: ...form an opening for the duct connector applies to Options A or B 3 Installtheductconnectorwiththebottomtabsextending into the supply air duct 4 Bend the tabs on the bottom of the duct connector upward...

Страница 18: ...y Air Duct Hole for Gas Line Wood Floor Bend tabs up 90 Figure 18 Screw Down Duct Connector Figure 20 Figure 20 A C Coil Box Installation D O N O T I N S T A L L S C R E W S I N T H I S S U R F A C E...

Страница 19: ...f drilling screws secure the bracket to the A C coil box and the furnace Repeat for other side of furnace 5 Position the plenum on top of the coil box and secure together with sheet metal screws The s...

Страница 20: ...have two switches one connected to the static tap on the inducer assembly and the other to the collector box Downflow M4RLSeries furnacesrequireonlyoneswitchconnected to the inducer s static tap as s...

Страница 21: ...itch Accessories The components in Figure 27 Figure 28 page 22 Figure 29 Figure 30 are included in the extra parts bag that is supplied with the purchase of M4RC M4RL furnaces Depending on your partic...

Страница 22: ...ield Supplied 2 PVC ELBOW Field Supplied PVC Trap 2 PVC Tee 2 x 1 2 PVC Reducer 1 2 x 1 2 Hose Barb 1 2 x 3 4 Hose Barb 2 PVC Pipe from Inline Drain Assembly Not Included 1 2 Tubing Formed into a Loop...

Страница 23: ...to the finish flange or vent pipe with a hose clamp if using neoprene couplings Upflowfurnacesrequirethe3 neoprenecouplingclamps to be installed above the coil box Upflow Furnaces Combustion air and...

Страница 24: ...secondary heat exchanger A drain must always be at the lowest point of the venting system NOTE Ifusingacondensatepump thefurnace drain line must be installed above the pumps water line Exceptions clar...

Страница 25: ...ply with the latest edition of the National Fuel Gas Code ANSIZ223 1 or CAN CGAB149 1or 2 Installation Codes Some local regulations require the installation of a manual main shut off valve and ground...

Страница 26: ...t t une solution savonneuse commerciale fabriqu esp cifiquementpurlad tectiondes fuites de gaz Un incendie ou une explosion peut entra ner des dommages mat riels des blessures ou la mort AVERTISSEMENT...

Страница 27: ...Shut Off Valve location requirements NOTE B Inducer assembly omitted for clarity of pipe installation Figure 35 Typical Gas Connections 4 7 5 3 6 UPFLOW MODELS DOWNFLOW MODELS 9 2 See Note B 1 3 See...

Страница 28: ...screw the orifices 7 into the gas manifold assembly 5 by hand until snug then tighten with a wrench 12 Install the appropriate LP Propane orifices 7 into the gas manifold assembly 5 13 Remove the pre...

Страница 29: ...vent cross threading hand tighten the plug first then tighten with 3 16 Allen wrench Measuring the Manifold Pressure The manifold pressure must be measured by installing a pressure gauge Manometer Mag...

Страница 30: ...t 105 F 40 C For electrical specifications refer to the furnace nameplate or Table 5 page 32 2 Check all gas connections for leaks with a soap and water solution If the solution bubbles there is a gas...

Страница 31: ...s or 2 Measure the current flow on the thermostat R W circuit after the circulating blower motor has started The six pin terminal marked Expansion Port is not used in the single stage furnace as shipp...

Страница 32: ...MOTOR CONNECTION FIELD WIRING LOW VOLTAGE CONNECTION R C Y G W NOTE The Y terminal on the control board must be connected to the thermostat for proper cooling mode operation Connect R W For Heating O...

Страница 33: ...t gas per hr Local heating value of the gas obtained from gas supplier 1 040 Btu per cubic ft Input rate 1 040 x 90 93 600 Btuh Verifying Adjusting Input Rate IMPORTANT NOTE The input rate must not ex...

Страница 34: ...l for cooling the contactorintheoutdoorcondensingunitisde energized and the control continues to run the fan for a period of 60 seconds Fan Mode When the thermostat energizes the G terminal for contin...

Страница 35: ...rned open Is the gas turned on Are any manual reset switches open Is the filter dirty or plugged Is the flame sensor coated Remove and clean with steel wool Do not use emery cloth or sandpaper Is ther...

Страница 36: ...ter s An air filter is supplied with the furnace as shipped from the factory It is recommended that filters be cleaned or replaced monthly during the heating season WARNING Never operate the furnace w...

Страница 37: ...ng Bottom Return Opening RC Upflow Furnace Model s Dim A Dim B Dim C 054D 24B 17 1 2 15 7 8 16 1 8 072D 35C 21 19 3 8 19 5 8 090D 35C 108D 45D 24 1 2 22 7 8 23 1 8 NOTE Dimensions shown in inches A 34...

Страница 38: ...1590 48 1555 49 1495 51 1435 53 1340 57 Low 1410 54 1390 55 1365 56 1330 58 1310 59 1275 60 1235 62 1210 63 RC090D 35C Side Return 90 000 High 2240 2175 35 2100 37 2040 38 1985 39 1910 40 1825 42 172...

Страница 39: ...agnostic Description Low Flame Sensor Signal Flame Present FAULT CONDITIONS Yellow LED Continuous Flash On Alternating Flash Replaces 710915B IGNITOR INDUCER FLAME SENSOR C BLOWER LIMIT DOOR SWITCH R...

Страница 40: ...44 220 439 84 43 214 429 86 42 209 419 88 41 205 409 90 40 200 400 92 39 196 391 94 38 191 383 96 38 188 375 98 37 184 367 100 36 180 360 102 35 176 353 104 35 173 346 106 34 170 340 108 33 167 333 11...

Страница 41: ...3 0 Manifold Pressure 9 000 to 9 999 FT 49 49 49 49 Orifice Size 2 8 2 8 2 8 2 8 Manifold Pressure Table 12 Table 12 High Altitude Deration Chart for Natural Gas Low Heating Value NATURAL GAS LOW HEAT...

Страница 42: ...air supply inlet to building or the combustion air inlet to any other appliance 6 inches 15cm for appliances 10 000 Btuh 3kW 6 inches 15cm for appliances 10 000 Btuh 3kW 4 ft 1 2m below or to side of...

Страница 43: ...Close to Furnace as Possible 2 x 3 Neoprene Couplings with 2 Hose Clamps Upward Pitch 1 4 Per Foot Exhaust Vent 5 3 Combustion Air Vent Pipe 7 3 x 90 Elbows 3 x 90 Elbow Exhaust Vent 3 Exhaust Vent St...

Страница 44: ...STION AIR X See NOTE 5 X See NOTE 5 PVC Tee PVC Trap X See NOTE 5 X See NOTE 5 PVC Tee PVC Trap Collector Box Drain Factory Equipped See NOTE 2 Inline Drain Field Supplied See NOTES 2 3 Drain Line Att...

Страница 45: ...PE Inline Drain Factory Supplied See NOTE 4 Collector Box Drain Factory Equipped See NOTE 2 Inline Drain Factory Supplied See NOTE 4 Collector Box Drain Factory Equipped See NOTE 2 Drain Line Attached...

Страница 46: ...controls the flow of gas to the burners When the gas valve is energized it automatically opens and regulates the gas pressure in the manifold Inducer Assembly The inducer assembly vents products of co...

Страница 47: ...47...

Страница 48: ...nstructions to the customer s package for future reference ELECTRICAL SYSTEM Electrical connections tight YES NO Line voltage polarity correct YES NO Supply Voltage _________________________________ V...

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