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7

CIRCULATING AIR REQUIREMENTS

 WARNING:

Do not allow combustion products to enter the 

circulating air supply. Failure to prevent the 

circulation of combustion products into the 

living space can create potentially hazardous 

conditions including carbon monoxide poisoning 

that could result in personal injury or death.

The surface that the furnace is mounted on must 

provide sound physical support of the furnace 

with no gaps, cracks or sagging between the 

furnace and the floor or platform.
Circulating air ductwork must not be connected 

to any other heat producing device such as a 

fireplace insert, stove, etc. This may result in fire, 

explosion, carbon monoxide poisoning, personal 

injury, or property damage.

Return Air

U.S.A. home manufacturers shall comply with all of the 

following conditions to have acceptable return air systems 

for closet installed forced air heating appliances:

•  The return air opening into the closet shall not be less 

than specified in the appliance’s listing.

• The cross-sectional area of the return duct system 

leading into the closet, when located in the floor or 

ceiling shall not be less than 235 in

2

.

 CAUTION:

HAZARD OF ASPHYXIATION: Do not cover or 

restrict return air opening.

•  Means shall be provided that prevent inadvertent closure 

of flat objects placed over the return air opening located 

in the floor of the closet (versus the vertical front or side 

wall).

• The total free area of openings in the floor or ceiling 

registers serving the return air duct system must be at 

least 235 in

2

. At least one register should be located 

where it is not likely to be covered by carpeting, boxes 

and other objects.

•  Materials located in the return duct system must have a 

flame spread classification of 200 or less. This includes 

a closet door if the furnace is in a closet.

•  Noncombustible pans having 1” upturned flanges are 

located beneath openings in a floor duct system.

•  Wiring materials located in the return duct system shall 

conform to Articles 300-22 of the National Electrical 

Code (ANSI C1/NFPA-70).

•  Gas piping is not run in or through the return duct system.

 CAUTION:

HAZARD OF ASPHYXIATION: Negative pressure 

inside the closet, with closet door closed and 

the furnace blower operating on high speed, 

shall be no more negative than minus 0.05 inch 

water column.

• Test the negative pressure in the closet with the air-

circulating fan operating at high speed and the closet 

closed. The negative pressure is to be no more negative 

than minus 0.05 inch water column.

•  Air conditioning systems may require more duct register 

and open louver area to obtain necessary airflow.

Supply Air

For proper air distribution, the supply duct system must be 

designed so that the static pressure measured external 

to the furnace does not exceed the listed static pressure 

rating shown on the furnace rating plate.
Location, size, and number of registers should be selected 

on the basis of best air distribution and floor plan of 

the home. 

The supply air must be delivered to the 

conditioned space by duct(s) secured to the furnace 

casing, running full size and without interruption.

 

Three typical distribution systems are shown in 

Figure 5

FURNACE INSTALLATION

NOTE: 

These Installation procedures are suggested for 

typical furnace installations. Since each installation is 

different, the sequence of instructions may differ from 

the actual installation. Only qualified HVAC technicians 

should install this furnace.
The installer must be familiar with and comply with all 

codes and regulations applicable to the installation of 

these heating appliances and related equipment. In 

the absence of local codes, the installation must be in 

accordance with the current provisions of one or more of 

the following standards.

• Federal Manufactured Home Constructions & Safety 

Standard (H.U.D. Title 24, Part 3280.707[a][2])

•  American National Standard (ANSI-119.2/NFPA-501C) 

for all recreational vehicle installations.

•  American National Standard (ANSI-Z223.1/NFPA-54) 

and/or CAN/CSA B149 for all gas-fired furnace models.

• American National Standard (ANSI-Z95.1/NFPA-31) 

and/or CSA B139 for all oil-fired furnace models.

Figure 5. Typical Supply Duct System

A Single trunk duct

B Dual trunk duct

w/crossover connector

C

Transition duct

   w/branches

Summary of Contents for MG1 Series

Page 1: ...ier call the fire department QUE FAIRE S IL Y A UNE ODEUR DE GAZ N essayez d allumer aucun appareil Ne touchez aucun interrupteur lectrique n utilisez aucun t l phone dans le b timent vacuez l immeubl...

Page 2: ...nversion to Propane LP Gas 19 Atmospheric Direct Ignition Furnaces 19 Measuring the Supply Gas Pressure 19 Measuring the Manifold Pressure 19 STARTUP ADJUSTMENTS 20 Operating Instructions Direct Ignit...

Page 3: ...pendant l installation l entretien et le fonctionnement de cette fournaise Le non respect des recommandations de s curit peut causer des dommages l quipement ou des blessures graves voire mortelles A...

Page 4: ...ANSI NFPA 70 CANADA Canadian Electrical Code CSA C22 1 Gas Piping Gas Pipe Pressure Testing US NFGC and National Plumbing Codes CANADA NSCNGPIC General Installation US Current edition of the NFGC and...

Page 5: ...sq in 1516 cm open free area in front or side wall 2 or In closet door located at top center or bottom CLOSET DOOR 6 152 mm Top Clearance Provide min 250 sq in 1613 cm open free area in front or side...

Page 6: ...e a louvered door with a minimum of 250 in2 free area with the openings in the closet door in line with the louvered openings in the furnace door A fully louvered closet door may be used See Circulati...

Page 7: ...ode ANSI C1 NFPA 70 Gaspipingisnotruninorthroughthereturnductsystem CAUTION HAZARDOFASPHYXIATION Negativepressure inside the closet with closet door closed and the furnace blower operating on high spe...

Page 8: ...1 7 8 2 7 8 C L Figure 7 Cut Out Dimensions for Round Duct Connectors Bend tabs up 90 Mounting Plate Duct Connector Connector Tabs Supply Air Duct Hole for Gas Line Wood Floor Figure 8 Standard Duct...

Page 9: ...to avoid misalignment of the furnace and vent piping To locate standard ducts see Figure 6 page 8 For round ducts see Figure 7 page 8 1 Measure 10 from the rear wall or alcove and mark the centerline...

Page 10: ...ector and the mounting plate to the wood floor with appropriate size screws 5 Connect the round supply duct to the underside of the duct connector and secure them with field supplied sheet metal screw...

Page 11: ...ING F S AW1523 0 2 4 A S 15 23 F S AW2135 0 2 4 A S 21 35 F S AW2747 0 2 4 A S 27 47 F S AW3563 0 2 4 A S 35 63 F S AW5195 0 2 4 A S 51 95 NOTE Not all models are available Check with your local distr...

Page 12: ...ough the opening cut on the roof 3 Connect inner flue pipe to vent collar of the furnace See Figure 22 4 Connectcombustionairpipetofurnacecollarwithsheet metal screw See Figure 22 NOTES Itisrecommende...

Page 13: ...stallations the electrical connections and grounding shall comply with the current Canadian Electrical Code CSA C22 1 and or local codes It is recommended that 115VAC line voltage be supplied to the f...

Page 14: ...unless the polarity and ground are properly connected as shown in Figure 25 and Figure 26 page 14 ForinstallationofA sizeCabinetfurnaces allowsufficient slack in the wiring if an optional cooling coi...

Page 15: ...Specifications Thermostat Wire Gauge FURNACE MODEL NUMBER FURNACE INPUT BTUH CABINET WIDTH IN NOMINAL ELECTRICAL SUPPLY MINIMUM OPERATING VOLTAGE MAXIMUM OPERATING VOLTAGE MAXIMUM FURNACE AMPERES MAXI...

Page 16: ...follow all safety warnings could result in serious injury death or property damage This furnace may be installed with left right or bottom gas entry Whenconnectingthegassupply provideclearance between...

Page 17: ...60HZ 30 vac Normal Anticipator Setting 0 4 Manifold Pressure for Natural Gas 3 5 w c Manifold Pressure for LP Gas 10 w c AVERTISSEMENT RISQUE D INCENDIE OU D EXPLOSION Le non respect des avertissement...

Page 18: ...e explosion carbon monoxide poisoning personal injury or death High altitude conversion with this furnace depends on the installation altitude and the heating value of the gas The installation of this...

Page 19: ...Pressure To obtain an accurate pressure reading turn off all gas appliances i e Dryers water heaters stoves etc at their ON OFF control or individual gas valves 1 Remove the inlet pressure plug from t...

Page 20: ...ace in service it must be checkedtoensureitisequippedforthetypeofgas being used The burner flame must be observed andadjustedifnecessary Failuretoobservethis cautionmayresultinunsafeoperation explosio...

Page 21: ...supplier See page 19 Verifying Adjusting Temperature Rise Confirm the temperature rise through the furnace is within the limits specified on the furnace rating plate Any temperature rise outside the...

Page 22: ...to the furnace before shutting off the electrical supply 7 When call for heat is satisfied the thermostat contacts open thegasvalveshutsoffgasflowandthecombustion blower remains on for a 30 45 second...

Page 23: ...gnitortipforflamerectification Misalignedignitordoesnotallowflametocontactignitor tip for flame rectification Burner Short Cycling Thermostat Calls for Heat Limit Switches Closed Check for polarity Ch...

Page 24: ...h Inspect the combustion chamber blower compartment flue collar and Roof Jack Check the gas valve if applicable and fuel line connections for leaks Make any adjustments necessary for good operation WA...

Page 25: ...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 33 167 333 110 33 16...

Page 26: ...27 24 Service Orifice Size Table 13 High Altitude Deration Chart for Natural Gas Low Heating Value Table 11 Natural Gas Heating Values LOCAL HEATING VALUES FOR NATURAL GAS ALTITUDE ABOVE SEA LEVEL BTU...

Page 27: ...115V N C L R GROUND SCREW GROUND SCREW GAS VALVE NEUTRAL L1 WIRE NUTS SUPPLIED BY INSTALLER 1 2 3 4 5 N L C G ECM BLOWER MOTOR G W Y R C CONTROL LIGHTS 1 2 1 2 BLACK BLACK 1 2 3 4 5 6 1 2 3 4 5 6 MOTO...

Page 28: ...Gas valve De energized when it should be Energized Rapid Flash Reverse Polarity Continuous On Normal Operation Flash codes stored in memory auto erased after 14 days Flash codes NOT stored in memory...

Page 29: ...79 53 2 Med Low 996 57 960 59 924 62 885 64 848 67 1 Low MG1E 090F1AAM1 MODEL NAME HEATING INPUT MOTOR SPEED EXTERNAL STATIC PRESSURE IN W C 0 1 0 2 0 3 0 4 0 5 CFM RISE CFM RISE CFM RISE CFM RISE CFM...

Page 30: ...6 0 7 0 8 CFM CFM CFM CFM CFM CFM CFM CFM MG1E 077F1AAM1 77 000 BTU Hr 5 High 1 573 1 541 1 511 1 479 1 452 1 419 1 388 1 358 4 Alternate 1 333 1 300 1 268 1 236 1 201 1 162 1 129 1 093 3 Med High 1 2...

Page 31: ...31...

Page 32: ...Literature Package been left with the unit YES NO ATTENTION INSTALLERS Itisyourresponsibilitytoknowthisproductbetterthanyourcustomer This includes being able to install the product according to strict...

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