Magic-Pak MGE4-09-18 User manual

506326-01 Page 1 of 20Issue 0941
Save these instructions for future reference
Installation and servicing of air conditioning equipment
can be hazardous due to internal refrigerant pressure
and live electrical components. Only trained and
qualified service personnel should install or service this
equipment. Installation and service performed by
unqualified persons can result in property damage,
personal injury, or death.
WARNING
Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage.
Refer to this manual. For assistance or additional information, consult a qualified installer, service agency,
or the gas supplier.
WARNING
The unit must be installed with approved wall sleeve and
grille accessories for safe operation. Improper
installations could result in property damage, personal
injury, or death.
WARNING
The installation of this appliance must conform to the requirements of the National Fire Protection Association; the National
Electrical Code, ANSI/NFPA No. 70 (latest edition) in the United States; the Canadian Electrical Code Part 1, CSA 22.1
(latest edition) in Canada; and any state or provincial laws or local ordinances. Local authorities having jurisdiction should
be consulted before installation is made. Such applicable regulations or requirements take precedence over the general
instructions in this manual.
CAUTION
TABLE OF CONTENTS
INSTALLATION ....................................................2
START-UP ..........................................................12
OPERATION ......................................................13
MAINTENANCE .................................................16
ACCESSORIES..................................................17
WIRING DIAGRAMS ..........................................19
Manufactured By
Allied Air Enterprises, Inc.
A Lennox International Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
*506326-01*
For your safety, do not store or use gasoline or other
flammable vapors and liquids in the vicinity of this or
any other appliance. Such actions could result in
property damage, personal injury, or death.
WARNING
Installation and Maintenance Instructions
MGE4 Series Gas Heating with Electric Cooling Unit

Page 2 of 20 506326-01Issue 0941
INSTALLATION
General
These instructions explain the recommended method of
installation of the MGE4 gas heating with electric cooling
unit and associated electrical wiring.
The MGE4 series are self-contained, gas-fired heating with
electric cooling models. The unit design has been certified
by Intertek Testing Services for compliance with the latest
edition of the American National Standard – ANSI Z21.47/
NationalStandardofCanada–CAN/CGA-2.3fordirectvent
central furnaces. The MGE4 models are certified to be in
compliance with the latest edition of A.R.I. Standard 390.
All models are design certified for heating operation when
fired with natural or propane gas. Units must be equipped
to use the fuel type provided in the field.
These units are not approved for mobile or
manufactured home applications.
These instructions, and any instructions packaged with
matingcomponentsand/oraccessories,shouldbecarefully
read prior to beginning installation. Note particularly any
CAUTIONS or WARNINGS in these instructions and all
labels on the units.
These instructions are intended as a general guide only, for
usebyqualifiedpersonnelanddonotsupersedeanynational
or local codes in any way. Compliance with all local, state,
provincial,ornationalcodespertainingtothistypeofequipment
should be determined prior to installation.
Limitations
The unit should be installed in accordance with all national
andlocal safetycodes.Limitationsofthe unitandappropriate
accessories must also be observed.
The outdoor fan is designed to operate against no more
than .10" W.C. static pressure.
Minimum and maximum operation conditions must be
observed to assure maximum system performance with
minimumservice required.RefertoTable1for theapplication
limitations of the unit.
Location
For information on wall sleeves and grille accessories, see
ACCESSORIES on page 17.
Thedesigniscertifiedfor thru-the-wall installationonly. The
interior portions of the unit may be surrounded by a closet
with clearances to combustible material held to 0" at the
sides,top, and frontoftheplenum. Allservicing andcleaning
of the unit can be performed from the front. If installed in a
closetor utilityroom,provide25"clearanceinfront forservice
if the door to the room is not in line with the front of the unit
(see Figure 1). Accessibility clearances must take
precedence over fire protection clearances.
Inspection
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted on
the carrier’s freight bill. Take special care to examine the
unit inside the carton if the carton is damaged. File a claim
with the transportation company. If any damages are
discoveredand reported to the carrierdonot installthe unit,
as claim may be denied.
Check the unit rating plate to confirm specifications are
as ordered.
In the State of Massachusetts:
This product must be installed by a licensed Plumber
or Gas Fitter. When flexible connectors are used, the
maximum length shall not exceed 36". When lever-
typegasshutoffsare used,theyshallbeT-handle type.
WARNING
The unit must be installed with approved wall sleeve
and grille accessories for safe operation. Improper
installations could result in property damage, personal
injury, or death.
WARNING
Table 1
Application Limitations
DB = Dry Bulb
WB = Wet Bulb
F°erutarepmeTriAtneibmAroodtuO
BDmuminiM BDmumixaM
looClooCtaeH
5651157
F°erutarepmeTriAtneibmAroodnI
muminiM mumixaM
BW/BD BD BW/BD BD
looCtaeHlooCtaeH
75/260527/0908

506326-01 Page 3 of 20Issue 0941
Minimum Clearances
Figure 1
Top View
Clearance to combustible materials is 0" at the side, top, and front of plenum. If accessibility clearances are
greater than clearances to combustibles, accessibility clearances take precedence.
The front of the unit must be accessible for service. If the unit is enclosed, providing a door or access panel
opposite the front of the unit is the preferred method of providing access. The door or access panel must be
at least 30" wide (centered on the unit) and as tall as the unit.
IMPORTANT
The unit must be installed with approved wall sleeve and grille accessories for safe operation. Improper installa-
tions could result in property damage, personal injury, or death.
* Minimum clearance to combustibles for the front
of the unit is 1". Added clearance must be
provided for the gas supply line and drain trap
installation.
1"
Min.
1"
Min.
Front of Unit Clearance to
Front of Unit*
Plenum
Exterior Wall
Wall Sleeve
(one each side)
Interior Wall
Clearances*
Mounting Strap
(one each side)
3/4" Plywood Riser
Floor
Platform (field supplied) - Must be level with sill plate of hole in exterior wall
4" Min.
Front of Unit
Sill Plate
Side View
unit must be supported by platform

Page 4 of 20 506326-01Issue 0941
Wall Sleeve and Louver Grille Installation
Refertoinstallationinstructionsincludedwiththewallsleeve
kit and the louver grille kit along with Figure 2 for guidance
inassemblingandinstallingthe wall sleeve and louver grille.
The outside of the unit may be flush with the face of the
exterior wall, and it should not be obstructed with trees,
landscape materials, or building structure. Unit can be
installedrecessed withappropriatewallsleeveaccessories.
There is no minimum clearance required on locating the
unit to an interior corner of a building.
Ifthe unitisinstalledina residentialgarage,itmustbelocated
orprotected to avoid physicaldamage by vehicles. The unit
must be installed so that no electrical components are
exposed to water. If drains are exposed to temperatures
below freezing they must be protected.
This unit must be installed level to allow for proper
drainage of the unit base pan and indoor drain pan.
CAUTION
Figure 2
Wall Sleeve and Louver Kit Installed
NOTE: Platform must be constructed so that it is level with sill plate of wall opening.

506326-01 Page 5 of 20Issue 0941
Venting
The venting system is an integral part of the appliance. The
ventingsystem must notbe modified inany matter otherthan
what is specified in these instructions.
This appliance should be installed in a location such that
the vent outlet is located in the following manner:
1. Distances to windows that open, building openings, or
public walkways should be consistent with the National
Fuel Gas Code Z223.1 or CAN/CGA-B149.1 & .2.
2. ForU.S. installations,the vent systemshall terminate a
minimumhorizontalclearance of4'fromelectricmeters,
regulators, and relief equipment. For installations in
Canada, refer to the current CAN/CGA-B149.1 & .2 or
with the authorities having local jurisdiction.
3. Flue products from properly adjusted and maintained
units, will not cause degradation to building materials.
The unit contains an exhaust blower. The blower draws the
combustionproductsoutoftheheatexchanger together with
dilutionairand forces themixturefromtheunit to the outside.
No special provisions are required for supplying air for
combustion, nor is a chimney required.
Theventoutletmustbeextended(seeVent Pipe Installation
on page 6).
Theventing systemisdesignedforproperoperationunder all
weatherconditionsandforwindsup to 40 miles per hour,and
should be unobstructed for a minimum of 2 feet.
Existing Venting Systems
When an existing furnace is removed and replaced, the
MGE4unit ventingsystemmay nolongerbe sizedtoproperly
vent the attached appliances. An improperly sized venting
system can result in spillage of flue products into the living
space, the formation of condensate, leakage, etc. Refer to
the WARNING box in the next column for proper test
procedure.
Failure to follow the steps outlined below for each
appliance connected to the venting system being
placed into operation could result in carbon monoxide
poisoning or death.
Thefollowing stepsshall befollowedforeachappliance
connected to the venting system being placed into
operation, while all other appliances connected to the
common venting system are not in operation:
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper size
andhorizontalpitch,asrequiredintheNationalFuel
GasCode,ANSIZ223.1/NFPA54(latestedition) or
the CSA B149.1, Natural Gas and Propane
InstallationCodesandtheseinstructions.Determine
that there is no blockage or restriction, leakage,
corrosion, or other deficiencies which could cause
an unsafe condition.
3. As far as practical, close all building doors and
windows between the space in which the
appliance(s) connected to the venting system are
located and other spaces in the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any
exhaustfans, such as range hoodsandbathroom
exhausts, so they are operating at maximum
speed. Do not operate a summer exhaust fan.
6. Followthelighting instructions.Placethe unitbeing
inspected in operation. Adjust the thermostat so
applianceis operating continuously.
7. Testforspillagefromdrafthoodequippedappliances
at the draft hood relief opening after
5 minutes of main burner operation. Use the flame
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,
ANSIZ223.1/NFPA54(latestedition)and/ortheCSA
B149.1, Natural Gas and Propane Installation
Codes.
9. After it has been determined that each appliance
remainingconnectedtotheventingsystemproperly
vents when tested as outlined above, return doors,
windows,exhaustfans,fireplacedampers,andany
other gas-fired burning appliance to their previous
conditions of use.
CARBON MONOXIDE POISONING HAZARD
WARNING
The sleeve is not intended as the sole support for the
unit.An additionalsupportmust beprovidedforadequate
support (see Figure 2).
CAUTION

Page 6 of 20 506326-01Issue 0941
3. Remove the 5/16" screw used to mount the vent pipe
assembly to the mounting bracket. Keep this screw.
4. Fiveholeshavebeen drilled into the vent extension(see
Figure 4). Four of those holes are provided so that the
ventcan be extended the necessarylengthrequired for
the installation. The wall sleeve that is installed
determines which of these clearance holes should be
used. Using Table 2 and Figure 4, determine which
clearance hole should be used to position the vent
extensionproperly. Slidetheventextensionoutward and
lineup the correct clearance holeonthe vent extension
withthe holeinthe ventpipeandtheholeinthe mounting
bracket.
5. Re-install the 5/16" screw that was removed in Step 3.
Threadthe screw firstthrough the clearance holein the
mountingbracket, the proper clearance holeinthe vent
extension, and into the engagement hole in the vent
pipe.The lengthofthe vent pipe extension thatextends
out of the cabinet should be as shown in Table 2.
6. Position the vent pipe at the center of the steel insert
when using poly louvers. The vent pipe should have a
slight downward slope to allow any moisture to drain
away from the unit as well as being centered on the
metal grate.
Installing and Securing Unit to Wall Sleeve
Before installing and securing the unit to the wall sleeve,
make sure that the proper louver kit is installed. Due the
hightemperaturesof the combustion productsreleasedfrom
the gas vent, MGE gas package units require the use of
eitheranaluminumlouver kit or special MGE polypropylene
louver kit (see ACCESSORIES on page 17).
1. Make sure the gaskets attached to the sleeve are not
damaged.
2. Verifydividerpanelispositionedproperly.Figure5shows
the correct position for 60" and 64" tall units (flange
pointing up). For 58" tall units, the divider panel should
be positioned so the flange points down.
1. Access vent pipe at the side of the unit that will face the
outdoors.
2. The vent pipe and vent pipe extension is located to the
right of the outdoor fan (see Figure 3).
Vent Pipe Installation
Determining the length of the vent pipe extension is
dependent upon which wall sleeve accessory is installed at
the job site for each particular installation.
Forproper operation, the vent lengthmustbe correct for
the installation. The unit may not operate correctly with
inadequate vent length.
CAUTION
Figure 3
Locating Vent Pipe and Extension
Mounting
Bracket
Vent Pipe
Outdoor Fan
Positioning Vent Pipe Extension
Figure 4
* The clearance holes are not marked on the actual
ventextension.
Outdoor Fan
0
Vent Extension
Clearance Holes*
Determining Hole Setting
Table 2
ASLEEVE12-1, 2, 3, 4
Hole
#
Wall Sleeve Used
Approximate
Length the Vent
Extends from
the Cabinet
ASLEEVE6-1, 2, 3, 4
ASLEEVE8-1, 2, 3, 4
ASLEEVE10-1, 2, 3, 4
ASLEEVE2-1,2
4
3
2
1
0
5.5 Inches
7.5 Inches
9.5 Inches
11.5 Inches
0 Inches

506326-01 Page 7 of 20Issue 0941
4. Use the two installation brackets to secure the unit to the
wallsleeve (see Figure 6).Theunitsareshipped with the
brackets placed loose on the unit top panel, beneath
packaging. Hook each bracket into the front edge of the
wall sleeve side. Position the bracket so it can be bent
around the front corner of the unit. Remove one of the
two screws in that position on the unit. Line up one of the
holes in the installation bracket with the screw hole and
attach the bracket to the unit with that screw. Make sure
tofastentight enough that the seal ismaintained.Trimoff
excess bracket if applicable.
Inspect the fit up of the unit to the wall sleeve. Verify
that the gaskets of the wall sleeve make a complete
seal to the unit paying particular attention to top and
bottom corners of unit to sleeve seal. Caulk if needed.
Ductwork
Ductwork should be designed and sized according to the
methods in Manual Q of theAir Conditioning Contractors of
America (ACCA).
Check unit air supply outlet for debris before making
ductwork connections.
It is recommended that supply and return duct connections
at the unit be made with flexible joints. If flexible ducts are
used, a 6" sheet metal starter collar is required.
Figure 5
Positioning Divider Panel
Divider must be positioned this way (flange up)
for 60" and 64" tall units.
Divider must be positioned this way (flange down)
for 58" tall .units
3. Place MGE unit into the wall sleeve. Lift leading end of
unitand walk unit onto thesleeve. Oncein thesleeve,
lowerunitintoposition. Thispreventsdamagetothebase
pads. Assure that unit is level and completely seated
against the gaskets on the wall sleeve. The unit must be
supported by a field supplied base platform.
Figure 6
Securing Unit
Installation
Brackets
Remove and replace screw to secure bracket
(one each side)

Page 8 of 20 506326-01Issue 0941
The supply and return air duct systems should be designed
for the CFM and static requirements of the job (see Table
3). They should not be sized to match the dimensions
of the duct connections on the unit. Thereturn duct must
besealedtotheunitcasingandterminateoutsidethespace
containing the unit.
Do not screw into the side of the drain pan, or into the
indoor coil.
Table 3
Blower Performance
Model Blower
Speed
External Static Pressure (in. w.c. w/filter)
0.1 0.2 0.3 0.4 0.5
MGE4-09-12
Low
Medium/Low
Medium/High
High
520 495 470 430 370
685 655 600 540 490
755 715 660 595 610
815 770 710 640 575
MGE4-09-18
Low
Medium/Low
High
MGE4-09-24
Low
Medium/Low
Medium/High
Medium/High
High
650 630 610 580 550
500 470 435 390 370
670 640 575 520 460
750 690 645 575 490
795 740 680 616 535
945 900 860 810 775
1010 960 910 870 800
1090 1030 980 930 880
Low
Medium/Low
Medium/High
High
MGE4-09-30
640 620 600 575 540
940 890 860 820 785
1000 960 910 875 820
1110 1060 1010 960 915
MGE4-09-36
Low
Medium/Low
Medium/High
High
630 620 610 580 550
900 890 850 800 750
1070 1030 1000 920 840
1220 1150 1100 1030 920
MGE4-10-18
Low
Medium/Low
Medium/High
High
600 580 550 515 450
820 765 720 660 595
880 825 790 720 645
945 885 825 760 690
MGE4-10-24
MGE4-10-30
Low
Low
Medium/Low
Medium/Low
Medium/High
Medium/High
High
High
630 610 590 560 520
905 870 830 780 735
955 905 860 815 770
1040 990 935 890 835
640 620 600 575 540
940 890 860 820 785
1000 960 910 875 820
1110 1060 1010 960 915

506326-01 Page 9 of 20Issue 0941
Air Filter
All indoor return air must be filtered. A washable filter is
furnished with the unit, located in the return air opening.
Provisions must be made to accommodate filter servicing.
Thefiltershouldbe cleaned at least three timesduringeach
of the heating and cooling seasons, or more frequently if
unusualconditionsare encountered.To clean thewashable
filter, shake filter to remove excess dirt
and/oruse avacuumcleaner.Washfilter insoapordetergent
water and replace after filter is dry. It is not necessary to oil
the filter after washing.
If an installation is made in which it is more desirable to
mountthe filter exterior to theunit,in the return ductworkor
elsewhere, the washable filter can be used or replaced with
a disposable filter. If a disposable filter is used, use the
information provided in Table 4 when sizing the disposable
filter. These units are not designed for high static filtration.
Condensate Drain
Provisions must be made to properly drain the indoor and
outdoor drain pans of this appliance.
The indoor drain pan drains internally into the outdoor drain.
Theoutdoordrainconnection is a3/4" NPT to 3/4"PVC fitting
(schedule40minimum). Thedrainsizeshouldnotbereduced.
The drain must be trapped as shown in Figure 7. The drain
line should pitch gradually downward at least 1" per 10' of
horizontal run to open drain.
Electrical Connections
All wiring must be done in accordance with the National
Electrical Code (NEC), ANSI/NFPA No. 70 (latest edition);
CanadianElectricalCodeCSAC22.2Part 1 (latest edition);
orlocalcodes, where they prevail. Any alteration of internal
wiring will void certification and warranty. Units are factory
wired for a 230 volt single phase power supply. If power
supply is 208 volts, it will be necessary to change a wire
connectiononunittransformerfrom240voltterminal to 208
volt terminal as shown on the wiring diagram.
Use wiring with a temperature limitation of 75°C minimum.
Run the 208 or 230 volt, 60 hertz electric power supply
through a fused disconnect switch to the control box of the
unitand connect as shownin the wiring diagramlocatedon
the inside of the control access panel.
The unit must be electrically grounded in accordance with
local codes or, in the absence of local codes, with the
National Electrical CodeANSI/NFPANo. 70 (latest edition)
or CSA C22.2 Part 1 (latest edition).
Power supply to the unit must be NEC Class 1 and must
complywithallapplicablecodes. Afuseddisconnect switch
should be field provided for the unit. The switch must be
separate from all other circuits. If any of the wire supplied
withtheunitmust be replaced, replacement wire mustbeof
the type shown on the wiring diagram.
Electrical wiring must be sized to minimum circuit ampacity
marked on the unit. Use copper conductors only. Each
unit must be wired with a separate branch circuit and be
properly fused.
Figure 7
Condensate Drain Installation
Use thread sealant on the threaded fittings. Install
threaded fittings by hand only. Do not overtorque the
fittings.
CAUTION
Minimum Required Surface Area
for Disposable Filters
Table 4
* 9 and 10 EER models
Model Number Filter Area
MGE*12
MGE*18
MGE*24
MGE*30-36
192 Square Inches
288 Square Inches
384 Square Inches
480 Square Inches

Page 10 of 20 506326-01Issue 0941
Gas Supply and Piping
Referto unitratingplate tomakesure thefurnaceis equipped
to burn the gas supplied (natural or propane).
Gas supply piping should be installed in accordance with
localcodes and the regulations oftheutility. Pipingmust be
of adequate size to prevent undue pressure drop. Consult
thelocalutilityorgassupplier for complete detailsonspecial
requirements for sizing gas piping.
If local codes allow the use of a flexible gas appliance
connector, always use anewlistedconnector. Do not usea
connector which has previously serviced another gas
appliance.
Pipe connections must be tight, and a non-hardening pipe
compound resistant to liquefied petroleum gases must be
used.
Connect the gas pipe to the furnace controls providing a
ground joint union as close to the controls as is possible to
facilitate removal of controls and manifold. Provide a drip
leg on the outside of the furnace. A manual shutoff valve
shall be installed in the gas line, outside the unit, 5' above
the floor, or in accordance with any local codes.
The furnace must be isolated from the gas supply piping
systembyclosingtheindividualmanualshutoffvalve during
any pressure testing of the gas supply piping system at test
pressureequalto or less than 1/2 psig(3.5 kPa) or 14" W.C.
Ifthe piping system isto be testedat pressures in excessof
1/2 psig (3.5 kPa), the furnace and its appliance main gas
valve must be disconnected from the gas supply piping
system.
Anyconversionofanaturalgasunittopropanegasmust
be done by qualified personnel using a conversion kit
availablefromthemanufacturer,followingtheinstructions
in the conversion kit. If done improperly, overfiring of the
burners and improper burner operation can result. This
can create carbon monoxide which could cause
asphyxiation.
WARNING
Figure 8
Gas Supply Piping
Return Supply
Manual Shutoff Valve
with 1/8" NPT Plugged Tapping,
Accessible for Test GaugeConnection
(Field Supplied)
Drip Leg (Field Supplied)
Ground Joint Union (Field Supplied)
Condensate Drain
Access Panel to
Compressor and
Outdoor Fan
Access Panel to
Gas Valve and Burners
Access Panel to
Filter and Controls

506326-01 Page 11 of 20Issue 0941
After gas piping is complete, carefully check all piping
connections (factory and field) for gas leaks. Use a leak
detecting solution or other preferred means. Some soaps
used for leak detection are corrosive to certain metals.
Carefully rinse piping thoroughly after leak detection has
been completed.
Thermostat
Theroomthermostatshouldbelocatedonaninsidewallwhere
it will not be subject to drafts, sun exposure, or heat from
electrical fixtures or appliances. Follow manufacturer’s
instructionsenclosedwiththethermostatforgeneralinstallation
procedures.Color-codedinsulatedwires(minimum#18AWG)
should be used to connect the thermostat to the unit.
The gas valve supplied with this furnace is rated at 1/2
psig maximum. Any higher pressure may rupture the
pressureregulatordiaphragm and may cause overfiring
of the burners and improper burner operation. The
overfiringmay result in thecreationof carbon monoxide
which could cause asphyxiation.
WARNING
Failuretofollowthesafety warnings exactly could result
in serious injury, death, or property damage.
Never test for gas leaks with an open flame. Use a
commerciallyavailablesoap solution made specifically
for the detection of leaks to check all connections. A
fire or explosion may result causing property damage,
personal injury, or loss of life.
WARNING
FIRE OR EXPLOSION HAZARD

Page 12 of 20 506326-01Issue 0941
START-UP
To Light Burners:
1. Turn off electrical power to unit.
2. Turn the thermostat to lowest setting.
3. Turnthegasvalveknobtothe“ON”position(seeFigure
9).
4. Turn on electrical power to the unit.
5. Set the room thermostat to the desired temperature.
If the thermostat “set” temperature is above room
temperature after the pre-purge time expires, burners
will light.
For Your Safety Read Before Lighting
To Shut Down Unit:
1. Turn off electrical power to unit.
2. Depress and turn the gas valve knob to the “OFF”
position (see Figure 9).
WARNING
If you do not follow these instructions exactly, a fire or
explosionmayresultcausingproperty damage, personal
injury, or loss of life.
This furnace is equipped with a direct ignition control.
Do not attempt to manually light the burners.
CAUTION
Gas Valve
Figure 9
ON
OFF
HONEYWELL
GAS
INLET
GAS
CONTROL KNOB
REGULATOR
ADJUSTMENT CAP

506326-01 Page 13 of 20Issue 0941
OPERATION
Operation of the unit is automatic and will provide heating
and cooling depending on the setting of the thermostat.
Heating
1. Turn on main power supply.
2. Open manual gas shutoff valve.
3. Set thermostat system to “HEAT”.
4. Set thermostat to temperature desired.
Sequence of Operation
1. Thermostat calls for heat.
2. Combustion blower starts and proper air flow is proven
by the pressure switch closing.
3. Blower continues to operate for 30 seconds prior to the
burners lighting.
4. Ignition control begins spark and opens gas valve. The
burners are lit. Ignition is proved through flame sensor.
5. Circulatingairblower starts30secondsafterthe burners
light.
6. When the thermostat is satisfied, the burners and
combustion blower shut off.
7. Circulating air blower will shut off 120 seconds later.
If the burners should fail to ignite, the ignition control will try to
ignite the burners a total of three times. Should the burners
failtoignitewithinthethreetrialsforignition,theignitioncontrol
willlock outfor1 hourbeforebeginninganotherignitioncycle.
To reset the control, turn the thermostat down or off for 10
secondsandthensettodesiredsetting. Atthistime,theignition
sequence will try again.
Cooling
1. Set thermostat system switch to “COOL”.
2. Set thermostat to temperature desired.
NOTE: When Y is energized, the combustion blower will
operate for 10 seconds. The purpose of this action is to
deter insect nesting in the flue pipe.
To Shut Down Unit
For temporary or short periods of shutdown, set the
thermostatsystem switchto“OFF”. Fora prolonged period
ofshutdown,setthethermostatsystemswitchto “OFF” and
turnofftheelectricalpowersupply and the gas supply to the
unit.
Adjustments – Heating Section
Temperature Rise
At time of installation, the temperature rise must be adjusted
to be within the range specified on the unit rating plate.
Checking and Adjusting Gas Input
The gas input must not exceed the figures shown on the
rating plate. The unit is equipped for rated inputs with
manifold pressures of: 3.5" w.c. for natural gas and 10.0"
w.c. for propane. The furnace requires conversion for use
withpropane(apropaneconversion kit isavailablefrom the
manufacturer).
The manifold pressure can be measured by removing the
pipe plug in the downstream side of the gas valve and
connecting a water manometer or gauge.
Onlysmallvariationsingas input may be made by adjusting
the regulator. In no case should the final manifold
pressure vary more than 0.3" w.c. for natural gas or 0.7"
w.c. for propane.
x3600 x
=Cubic Feet Per RevolutionBTU/HR
INPUT # Seconds Per Revolution Heating Value
To adjust the regulator, turn the adjusting screw on the
regulator clockwise to increase pressure and input or
counterclockwise to decrease pressure and input.
For Natural Gas: Check the furnace rate by observing the
gas meter, when available, making sure all other gas
appliancesareturned off. Thetesthandon the meter should
be timed for at least one revolution. Note the number of
seconds for one revolution.
The heating value of the gas can be obtained from the local
utilitycompany.
Thefurnace rate must bewithin+/- 2% of theappliance
rating input.
CAUTION

Page 14 of 20 506326-01Issue 0941
For Propane Gas: Theonly checkforthe furnace rate isto
properly adjust the manifold pressure using a manometer
and the information found in Table 5 on page 14. Typical
manifoldsetpointforinstallationsataltitudesfrom0to4500'
above sea level is 10.0" W.C.
Adjustments – Cooling Section
No adjustments are required or should be attempted
regardinganyofthecomponentsofthecoolingsystem. The
system should be checked to see that none of the wiring is
loose or missing.
System Performance
For maximum performance of the cooling system, the
operating temperatures and pressures should be checked
and superheat determined at Standard ARI test conditions
of 82°F outdoor – 80°F indoor dry bulb/67°F wet bulb. If
superheatmeasureddeviatesfromthe values given inTable
6, refrigerant charge should be adjusted accordingly for
maximum performance.
Blower
The unit contains a direct-drive, multispeed blower. The
proper speeds have been preset at the factory for typical
heating and cooling operation. Refer to the wiring diagram
for recommended heating/cooling speeds for specific
models. Speeds may require adjustment due to duct design
andapplication. Direct-driveblower motors are permanently
lubricated and do not require oiling.
Blower Operation
Continuousoperationoftheairhandlingblowerwillbeobtained
ifthe thermostatfanswitchis setto“ON”. With thethermostat
fan switch set to “AUTO”, the air handling blower will cycle
corresponding with the thermostat cycling.
Fan Control
The blower will start approximately 30 seconds after the
burnersigniteandwillstopapproximately120secondsafter
the thermostat is satisfied. The time delay is preset at the
factory and timing cannot be adjusted.
When the thermostat system switch is set for “COOL”, the
blower will start 5 seconds after the thermostat calls for
cooling and will stop 90 seconds after the thermostat is
satisfied.
A fan switch is provided on the thermostat which will bring
the blower on for continuous operation when the switch is
set for “ON”.
Manifold Pressure vs. Altitude
* Consult local utility for actual heating value.
Furnace Input = Input Factor x Nameplate Input
Above 7500 feet, refer to the National Fuel Gas Code.
Table 5
Altitude
(ft.)
Heating
Value
(Btu/ft.)
Manifold
Pressure
(in. w.c.)
Input
Factor
2000
3000
4000
4500
5000
5500
6000
6500
7000
7500
948
914
881
865
849
833
818
802
787
771
3.50
3.50
3.50
3.50
3.29
3.27
3.25
3.23
3.21
3.19
0.9666
0.9499
0.9332
0.9249
0.8900
0.8790
0.8680
0.8570
0.8460
0.8350
Suction Superheat
Magic-Pak
Model
Suction Superheat
@ AHRI Conditions
82° OD
80° IDDB/67° IDWB
MGE4-09-12
MGE4-09-18
MGE4-09-24
MGE4-09-30
MGE4-10-18
MGE4-10-24
MGE4-10-30
MGE4-09-36
24 - 26° F
21 - 23° F
16 - 18° F
11 - 13° F
22 - 24° F
14 - 16° F
17 - 19° F
27 - 29° F
Table 6

506326-01 Page 15 of 20Issue 0941
Limit Control
A fixed temperature limit control is provided which will shut
off the gas to the burners if the unit is overheated for any
reason. The control must not be adjusted or relocated.
Rollout Switch
If for any reason the exchanger were to become blocked,
there is a temperature sensitive switch located above the
burners that will turn off the burners. After correcting the
problem,thisswitchmust be manually reset by pressingthe
button on top of it.
HighAltitude
In both the United States and Canada, this unit is approved
foroperationataltitudes from 0 to 4500 feet abovesealevel
withoutanyrequiredmodifications. From4500to7500feet,
the gas manifold pressure needs to be adjusted according
to the information shown in Table 5. To adjust the manifold
pressure,referto previous sectionChecking andAdjusting
Gas Input on page 13. For installations above 7500 feet,
refer to the National Fuel Gas Code.
Installation and Operation in Extremely Cold Weather
Areas
Inareaswhereextremelycold outdoortemperatures (below
– 20°F) can be expected, some additional installation and
operating precautions should be taken. The following
precautions are designed to prevent possible vent system
ice blockage that could result in safety shutdown of the
burners:
1. Adjusttothehighest achievable temperature rise within
therise andstaticpressureranges specifiedontherating
plate. Depending on specific model, it may be possible
to change to a lower heating blower speed tap to get a
higher temperature rise. This also increases comfort.
2. Makesurethere arenoleaksofoutsideair intothereturn
air system.
3. Keep the outside louver grille as free as possible of any
ice that may form and obstruct the flue outlet.

Page 16 of 20 506326-01Issue 0941
Filters
Cleaning the air filter: Follow directions noted on the filter
and label attached to the access panel.
Cooling System
Therefrigeration system normally requires nomaintenance
since it is a closed, self-contained system. Periodic
maintenance is limited to:
• Cleaningtheair filter.Followdirectionsnotedonthefilter
and label attached to the access panel.
• Cleaning the condenser coil if covered with any foreign
material, lint, leaves, or other obstructions.
The condensing coil should be cleaned at a minimum
once per year. In areas subject to high traffic or
environmental conditions which may contain chloride,
sulfites, dust, ammonia, etc., more frequent cleaning is
required.
MAINTENANCE
Heating System
Burners
The burners can be removed for cleaning or changing
orifices. To remove the burners:
1. Disconnect electrical service and turn off gas to the
appliance.
2. Disconnectthe high voltage (ignitor) wire and the flame
sensor wire (S1) from the ignition control.
3. Remove ignitor and flame sensor.
4. Removethefourscrews that mount the burnerrightside
plate (houses the ignitor/flame sensing rod).
5. Carefully remove the burner right side plate.
6. Burnersarenowexposedandcanbeindividuallyremoved
fromassemblybyremovingthetwoscrewsthatholdeach
burner in the burner rack.
Burners can be cleaned using a bottle brush.
Orifices are threaded into the gas manifold and can be
removed by unscrewing.
When replacing the burner tray assembly, take care in
installing the flame sensor and ignitor rods back into the
burnerplate. Reconnecttheignitor and flame sensor wires.
Heat Exchanger
The heat exchanger should be inspected periodically and
cleaned if necessary. If cleaning is necessary, use a stiff
brush with a wire handle to remove scale. While cleaning
the heat exchanger, the vent extension tube should also be
cleaned. Removethefour screws on the combustionblower
mounting plate and take out the blower. Use a brush to
clean the vent extension tube.
Disconnect all electrical power to the unit before
conducting any maintenance procedures. Failure to
disconnect the power could result in personal injury or
death.
WARNING

506326-01 Page 17 of 20Issue 0941
ACCESSORIES
Kit No. Description Used With
ALVRPWHTMGE-1 Polypropylene Louver Kit (White) MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
ALVRPWHTMGE-2 Polypropylene Louver Kit (White) MGE4-10-30 & MGE4-09-36
ALVRPSANMGE-1
ALVRPSANMGE-2
Polypropylene Louver Kit (Sandstone)
Polypropylene Louver Kit (Sandstone)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-10-30 & MGE4-09-36
ALVRPBGEMGE-1
ALVRPBGEMGE-2
Polyproplene Louver Kit (Beige)
Polyproplene Louver Kit (Beige) MGE4-10-30 & MGE4-09-36
ALVRPTPSTMGE-1
ALVRPTPSTMGE-2
Polpropylene Louver Kit (Taupestone)
Polpropylene Louver Kit (Taupestone) MGE4-10-30 & MGE4-09-36
ALVRAL-1
ALVRAL-2
ALVRAL-3
ALVRAL-4
ALVRAL-5
ALVRAL-6
Etruded Aluminum Louver Kit
Etruded Aluminum Louver Kit MGE4-10-30 & MGE4-09-36
Extruded Aluminum Louver Kit (45” Height)
Extruded Aluminum Louver Kit (45” Height) MGE4-10-30 & MGE4-09-36
Extruded Aluminum Louver Kit (50” Height)
Extruded Aluminum Louver Kit (50” Height) MGE4-10-30 & MGE4-09-36
ASLEEVE2-1
ASLEEVE2-2
2” Wall Sleeve Kit
2” Wall Sleeve Kit MGE4-10-30 & MGE4-09-36
ASLEEVE6-1
ASLEEVE6-2
6” Wall Sleeve Kit
6” Wall Sleeve Kit MGE4-10-30 & MGE4-09-36
ASLEEVE8-1
ASLEEVE8-2
8” Wall Sleeve Kit
8” Wall Sleeve Kit MGE4-10-30 & MGE4-09-36
ASLEEVE10-1
ASLEEVE10-2
10” Wall Sleeve Kit
10” Wall Sleeve Kit MGE4-10-30 & MGE4-09-36
ASLEEVE12-1
ASLEEVE12-2
12” Wall Sleeve Kit
12” Wall Sleeve Kit MGE4-10-30 & MGE4-09-36
ASLEEVE6-3
ASLEEVE8-3
6” Wall Sleeve for 45” Louver
8” Wall Sleeve for 45” Louver
ASLEEVE10-3 10” Wall Sleeve for 45” Louver
ASLEEVE12-3 12” Wall Sleeve for 45” Louver
ASLEEVE6-4 6” Wall Sleeve for 45” Louver MGE4-10-30
ASLEEVE8-4 8” Wall Sleeve for 45” Louver MGE4-10-30
ASLEEVE 10-4 10” Wall Sleeve for 45” Louver MGE4-10-30
ASLEEVE 12-4 12” Wall Sleeve for 45” Louver MGE4-10-30
AFILTMP-1
ALPKT612-1
Outdoor Coil Filter Kit
Propane Conversion Kit
All Models
All Models
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)
MGE4-09 (12,18,24 & 30)/MGE4-10(18 & 24)

Page 18 of 20 506326-01Issue 0941
Wall Sleeve Dimensions (in.)
NOTE: Bottom surface of wall opening must be at least 4" off the floor.
29
16
Range of
Wall Thickness
16
B
1
A
C
D
Required Wall Opening
12
/
58
/
1-6EVEELSA6928/1-928/1-92
2-6EVEELSA64/3-238/7-238/1-92
3-6EVEELSA 6548/1-548/1-92
4-6EVEELSA
1-8EVEELSA8928/1-928/1-92
2-
8EVEELSA84/3-238/7-238/1-92
3-8EVEELSA 8548/1-548/1-92
4-8EVEELSA
1-01EVEELSA01928/1-928/1-92
2-01EVEELSA014/3-238/7-238/
1-92
3-01EVEELSA 01548/1-548/1-92
4-01EVEELSA
1-21EVEELSA21928/1-928/1-92
2-21EVEELSA214/3-238/7-238/1-92
3-21EVEELSA 2
1548/1-548/1-92
4-21EVEELSA
.oNtiKABCD
928/1-928/1-92
ASLEEVE2-2
ASLEEVE2-1
2
2
4/3-23 8/7-23 8/1-92
The unit must be installed with approved wall sleeve and grille accessories for safe
operation. Improper installations could result in property damage, personal injury, or
death.
WARNING

506326-01 Page 19 of 20Issue 0941
Figure 10
Connection Diagram

Page 20 of 20 506326-01Issue 0941
Figure 11
Schematic