Nordyne M3RL 060A AW User manual

Direct Vent (SeaHed Combustion) Forced Air Gas Furnaces
M3RL Series 90+ Downfiow Condensing Furnace
For installation in:
I. Manufactured Homes
2. Park Models and Manufactured Buildings
3. Modular Homes/Buildings
WARNING:
FiRE OR EXPLOSION HAZARD
Failure to fol!ow safety warnings e×actly could
result in serious injury, death or property
damage.
- Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
-WHAT TO DO mFYOU SMELL GAS
oDo not try to light any appliance.
oDo not touch any electrical switch; do not use any
phone in your building.
, Leave the building immediately.
oImmediately call your gas supplier from a neighbor s
phone. Follow the gas supplier's instructions.
, If you cannot reach your gas supplier, call the fire
department.
-installation and service must be performed by a
qualified installer, service agency, or the gas sup-
plier.
RISQUE D'INCENDmE OU D'EXPLOSmON
Le non-respect des avertissements de s_curit_
pourrait entra_ner des blessutes graves, la
mort ou des dommages mat_rieJs.
- Ne pas entreposer ni utiliser de I'essence ni
d'autres vapeurs ou liquides inflammables dans Ic
voisinage de cet appareil, ni de tout autre apparei
-QUE FAmRE S'IL YA UNE ODEUR DE GAZ
oNe pas tenter d'allumer aucun appareil.
,Ne toucher a aucun interrupteur 61ectdque;
n'utiliser aucun t616phone dans le b_timent.
oE_vacuerI'immeuble immCdiatement.
, Appeler immCdiatement le foumisseur de gaz en
employant le t616phone d'un voisin. Respecter
la lettre les instructions du foumisseur de gaz.
oSi personne ne repond, appeler le service des
incendies.
- Uinstallation et I'entretien doivent Ctre effectues
par un installateur qualifie, un organisme de
service ou le fournisseur de gaz.
BW Models
BWT Models
WARNING:
Shoumd overheating occur, or the
gas suppty fail to shut off, shut
off the manual gas valve to the
appliance before shutting off the
electrical supply.
Improper installation, adjust-
ment, amteration, 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.
LEAVE THESE mNSTRUCTmONS WroTHTHE HOMEOWNER.

TABLE OF CONTENTS
Generam ...................................................... 4
Unit Dimensions .................................. 4
Shipping Weights ................................ 4
Furnace Specification ........................ 4
Air Flow Data ..................................... 4
Owner's hformation ................................ 5
Installation Requirements ...................... 6
Location .............................................. 7
Clearance ........................................... 7
Circumating Air Supply ............................ 7
Return Air Provisions .............................. 8
Air Distribution Systems ........................ 9
Duct Connector Selection .................... 10
Duct Installation .................................... 10
Venting and Combustion
Air Requirements ........................... 13
Venting Requirements .......................... 14
Vent Table ........................................ 15
Vent Pipe Material ............................ 16
Vent Pipe Length and Diameter ....... 16
Vent Pipe installation ........................ 16
Pipe Routing & Support .................... 16
Location of Outdoor Termination ..... 16
Horizontal Venting ............................ 18
Vertical Venting ................................ 18
Vent Freezing Protection ................. 19
Concentric Vent Termination ........... 19
Drainage of Condensate
From Furnace ................................ 19
Gas Supply and Piping ......................... 20
Leak Check ....................................... 21
High Altitude Derate ......................... 21
Pressure Switch .............................. 21
Conversion .............................................. 21
Lighting and Adjustment
of the Appliance .............................. 23
ElectdcaIWiring ...................................... 24
Line Voltage Wiring ........................... 24
Low Voltage Wiring ........................... 26
Ventilation ................................................ 26
Start-up and Adjustment ........................ 26
Start-Up Procedure ........................... 26
Shut Down Procedure ....................... 27
Verifying and Adjusting Firing Rate ... 27
Temperature Rise ............................. 27
Verifying and Adjusting
Verifying Burner Operation .............. 28
Verifying Operation of the
Supply Air Limit Switch ................. 28
Description of Components ................ 29
Furnace Accessories ............................. 29
Maintenance ........................................... 29
Combustion Air and Vent System .... 29
Air Filter(s) ....................................... 29
Lubrication ........................................ 30
Condensate Drain Assembly ........... 30
Blower Compartment ....................... 30
Heat Exchanger and Burner
Maintenance .................................. 30
System Operation Information ............. 30
Sequence of Operation .................... 30
Furnace Fails to Operate ................. 31
Location of Major Components .......... 32
Wiring Diagram ....................................... 33
instaliationlPerformance
CheckJist ......................................... 35
M3RL-
Application 1
M-Manufactured Home
Furnace Series
Comfort Mode! m
RL - Condensing Downflow
Heating Capacity
input, BTUH (000')
060 A -A W c°°,,°°,°t,°°
W - White
G - Gray
Cabinet Dimensions
A - 56" x 19-3/4" x 23-3/4"
B - w/Coil Cavity,
76" x 19-3/4" x 23-3/4"
Electricam Code
A - IPH, 60 Hz, 120 VAC
Tabte 1. Model identification 3

2"37116
-- I£_7/8 --
®
/32
Cooling
Coil
Box
i i
%1#2
317132
COMBUSTION AiR INTAKE
1-1/118
EXHAUST
VENT
18 1#2
56!/16
(W/O CoilBo_)
917132 ,
1_3/!6
24_5/8 --
KNOCKOUTS
•I-- I_r2 fl
21 157/6 --
1 19F32
_-- 24_t4 --
(W/C_EBOX}
7_!_
Top Return Knockouts
_J
, \
Top View
(AW and BW Models)
Figure 1. Furnace Dimensions
_12.000_
1000
21000
O
=©
Top Returr_ Opening
(BWT Models)
Furnace Model
M3RL 060A AW
M3RL 060A BW*
M3RL 080A AW
M3RL 080A BW*
* May include suffix - T
Table 2.
Shipping
Weight
(Ibs)
15O
170
155
175
Shipping Weight
Furnace Specifications /Airflow Data
Furnace Furnace Temp.
Furnace Input Output Rise @ Motor
Model No. Btuh Btuh .3"WC °F HP
M3 RL-060 60,000 54,000 35- 65 I/2
M3 RL-080
Note:
80,000 72,000 35 - 65 I/2
External Static Pressure ( Inches Water Column) Recommended
Motor 0.1 0.2 0.3 0.4 0.5 A/C
Speed CFM CFM CFM CFM CFM Ton
High* 1660 I599 I544 1474 I410 4
Med-High 1512 I467 I416 1363 I304 3
Med-Low 1340 I304 I261 1217 II58 2.-I/2
Low** 1176 II42 I108 1025 966 2
High* 1660 I599 I544 1474 I410 4
Med-High 1512 I467 I416 1363 I304 3
Med-Low** 1340 I304 I261 1217 II58 2.-I/2
Low 1176 II42 I108 1025 966 2
Data is for Operation with Filter,
* Factory Wired Cooling Tap
** Factory Wired Heating Tap
Table 3. Furnace SpecificationslAirflow Data

WARNmNG:
Do not use this appmiance if any part
has been submerged underwater. Im-
mediatemy camsa quamified service tech-
nician to inspect the appmiance and to
repmace any part of the controm system
and any gas controm that has been
submerged underwater.
NOTICE TO iNSTALLER
Installer is advised to follow carefully all instruc-
tions and warnings in this manual to insure
maximum performance, safety, and operating
efficiency of these appliances. Improper installa-
tion may create hazardous conditions, and will
void the appliance warranty.
GENERAL
General Description
The M3 series gas furnaces are listed direct
vent (sealed combustion) forced air furnaces
for use with both natural and propane gases.
The M3 series is a Category IV and type FSP
furnace. The M3 furnace series has been
certified to the ANSi Z21.47/CSA2.%2001 for
use in the United States and Canada and to the
UL307B --1995 for use in the United States.
These furnaces may be installed in:
I. Manufactured Homes.
2. Park Models and Manufactured buildings
3. Modular Homes/Buildings
The following are safety guidelines with refer-
ences to their specific sections or pages in the
manual.
I. Use only type of gas approved for this
furnace. Refer to the furnace rating plate.
2. Install this furnace only in location and
position as specified in pages 7 - 13 of
these instructions.
3. Provide adequate combustion and ventila-
tion air to the furnace space as specified in
pages 13 - 20 of these instructions.
4. Combustion products must be discharged
outdoors, connect this furnace to an ap-
proved vent system only, as specified in
pages 14-19 of these instructions.
5. Never test for gas leaks with an open
flame. Use a commercially available soap
solution made specifically for the detection
of leak to check all connections.
6. Always install furnace to operate within the
furnace's intended temperature rise range
with a duct system that has an external
static pressure within the allowable range,
as specified in page 4 of these instruc-
tions. See furnace rating plate.
7. 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 contain-
ing the furnace. Note: This section only
applies to furnaces installed with side or
top return air.
8. A gas-fired furnace for installation in a
residential garage must be installed as
specified in page 7 of these instructions.
9. The furnace is not to be used for tempo-
rary heat of buildings or structures under
construction.
M3 series furnaces are air conditioning ready
as shipped. The furnace cooling capacities of
the blower motor speed taps are shown in
Table 3. Table 2 lists the shipping weights for
the M3 series furnaces.
OWNER NFORMATION
NORDYNE has been involved in the design of
products for the manufactured home industry
since the first manufactured home or trailer
was built.
NORDYNE originated the sealed combustion
system, which separates the furnace com-
bustion system from the living area of the
home, now a standard for the manufactured
home industry.
NORDYNE engineers developed the first cen-
tral heating system and the first central air
conditioner for manufactured homes.
NORDYNE is dedicated to bringing to its cus-
tomers the finest heating and cooling comfort
possible. NORDYNE constantly seeks to fur-
ther refine its products to continuously provide
exceptional comfort.

Followtheinstructionsinthisbookletcarefully
andthisappliancewillprovidemanyyearsof
superiorperformance.
if youwishto coolyourhomeautomatically
witha centralair conditioningsysteminvesti-
gatetheexcellentNORDYNEcoolingsystems
availablefromyourheatingandcoolingcon-
tractor.Thesesystemsare designedto work
bestwithyour NORDYNEfurnaceand have
beencarefullyengineeredto deliveroptimum
performancewhen matedwith NORDYNE
manufacturedhomefurnaces.
NORDYNEalsoofferswaterheaters,fireplaces
andventilatingsystemsspecificallydesigned
formanufacturedhousingapplications.Check
with your manufacturedhomeretailer,your
heating and cooling contractor or your
distributorfor information.Writedirectlytothe
factory(POBox8809,O'Fallon,MO63366)if
youarenotabletolocateasourceforNORDYNE
manufacturedhousingproductsin yourarea.
MANUFACTURERWARRANTY,OWNER'S
RESPONSIBILITIES
itisthesoleresponsibilityofthehomeownerto
makecertainthegasfurnacehasbeencorrectly
setupandconvertedtotheproperfuel(UP.gas
or Naturalgas)andadjustedtooperateprop-
erly.All gas furnacesare manufacturedfor
Naturalgasandmustbefieldconvertedwhen
usingUP.gas.
Awarrantycertificatewithfulldetailsisincluded
withtheseinstructions.However,NORDYNE
willnotberesponsibleforanycostsfoundnec-
essaryto correctproblemsdue to improper
setup,improperinstallation,furnaceadjustments,
improperoperatingprocedureonthepartofthe
user,etc.
Somespecificexamplesofservicecallswhich
cannotbeincludedinwarrantypaymentsare:
I. Convertingthefurnacetouseanothertype
ofgas.
2. Repairingductworkinthehomefoundtobe
faulty.
3. Correctingwiringproblemsintheelectrical
circuitsupplyingthefurnace.
4. Resettingcircuitbreakers,blownfusesor
otherswitches.
5. Correctingproblemsdueto impropergas
supplypressuretothefurnace.
6. Providinginstructionaltrainingon howto
lightandoperatethefurnace.
7. Furnaceproblemscausedbyinstallationof
anair conditioner,heatpumpor otherair
comfortdevices.
8. Revisinginstallationof the furnaceflue
assembly.
9. Adjustingorcalibratingofthermostat.
10.Any constructiondebriswhichfalls into
thefluesystem.
Carefullyreviewtheseresponsibilitieswithyour
manufacturedhousingdealer,servicecompany
orgassuppliersotherewill beno misunder-
standingatalatertime.
CAUTmON'.
Never attempt to alter or modify this
furnace or any of its components.
Never attempt to repair damaged or
inoperable components. Such action
could cause unsafe operation, ex-
plosion, fire and/or asphyxiation.
• If a malfunction has occurred, or if
you feel that the furnace is not oper-
ating as it should, contact a qualified
service agency or gas utility for as-
sistance.
iNSTALLATiON STANDARDS
Installer shall be familiar with and comply with all
codes and regulations applicable to the installa-
tion of these heating appliances and related
equipment. In lieu of local codes, the installation
shall be in accordance with the current provi-
sions of one or more of the following standards.
a. Federal Manufactured Home Constructions
& Safety Standard (H.U.D. Title 24, Part
3280.707[a][2])
b. The Standard for Manufactured Home Instal-
lations (Manufactured Home Sites, Commu-
nities, and Set-Ups) ANSI A225.1 and/or
CAN/CSA-2240 MH Series).
c. American National Standard (ANS1-119.2/
NFPA-501C) for all recreational vehicle in-
stallations.
d. American National Standard (ANSI-Z223.1/
NFPA-54) and/or CAN/CGA B149 for all gas-
fired furnace models.
e. American National Standard (ANSI-C1iNFPA-
70) and/or CSA 22. I Canadian Electric Code
Part I for all electrical field wiring.

CE gen6rateurd'air chauddoit 6tre installe
conformementauxinstructionsdufabricantet
auxcodesIocaux.EnI'absencedecodelocal,
respecterlanormeANSIZ223.,I,instituleNa-
tionalFuelGasCodeoulescodesd'installation
CAN/GCA-B149.
TheNationalFuelGasCodeis availableby
writing:
AmericanNationalStandardsinstitute,inc.
1430Broadway
NewYork,NY10018
NFPApublicationsareavailablebywriting:
NationalFireProtectionAssociation
BatterymarchPark
Quincy,ME02269
LOCATION
The furnace must be installed on a level suF
face, and as close to the center of the air
distribution system as possible. See Figure I
for overall dimensions to determine the re-
quired clearances in hallways, doorways,
stairs, etc. to allow the furnace to be moved to
the installation point. The furnace must be in-
stalled 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.
This furnace is certified for use on wood
flooring. The furnace must be installed on a
solid surface and must be level front4o-back
and side-to-side. This furnace must not be
installed directly on carpeting, tile, or any com-
CLOSET ALCOVE
ALL MODELS Inches Inches
Front
Back
Sides
Vent
Top
Duct (Plenum)
w/Coil Box
w/o Coil Box
(within 3 feet)
1" 1"
0 0
0 0
0 0
6 6
0 0
1/4 1/4
*Note: For 1"clearance, use afullylouvered door with at
least 400 square inches offree airflow area.
Table 4. Minimum Clearances
bustible material other than wood flooring. The
furnace may be installed on combustible floor-
ing when installed on a Nordyne duct connec-
tor (see Table 5).
The ductwork within 3 feet of the furnaces
without the A/C coil box must be installed such
that surfaces are at least I/4" from combustible
materials.
When installed in a residential garage, the fur-
nace must be positioned so the burners and the
source of the ignition are located no less than
18 inches above the floor and protected from
physical damage by vehicles.
CiRCULATiNG AiR SUPPLY
WARNmNG:
Products of combustion must not be
allowed to enter the return air openings
of the furnace 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 iniury or death.
The floor 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 floor or platform.
The circulating air ductwork must not
be connected to any other heat
producing device such as a fireplace
insert, stove, etc.
GENERAL
Plenums and air ducts must be installed in
accordance with the Standard for the Installa-
tion of Air Conditioning and Ventilating Systems
(NFPA No. 90A) or the Standard for the Instal-
lation of Warm Air Heating and Air Conditioning
Systems (NFPA No. 90B).

RETURN AiR PROViSiONS
U.S.A. home manufacturers shall comply with
aft of the following conditions to have accept=
able return air systems for closet installed
forced air heating appliances:
a. Regardless of the location, the return air
opening into the closet shall not be less than
specified in the appliance's listing.
b. Means shall be provided to prevent inadverb
ent closure by a flat object placed over the
return air opening when it is located in the
floor of the closet (versus the vertical front
or side wall).
c. Closet installations must use a Iouvered
door having a minimum free area of 235 sq.
in. when located 6" from furnace. For clear=
ance between I" and 6" from furnace, re-
quirements are a Iouvered door with mini-
mum of 235 sq. in. free area, with the open=
ings in closet door directly inJine with the
Iouvered openings in the furnace door. For
I" clearance from furnace, use a fully Iou-
vered door with at least 400 sq. in. of free
airflow area.
d. The cross-sectional area of the return duct
system leading into the closet, when located
ASingle trunk duct
,
/Dual trunk duct
B w/crossover connector
I
I
I
Transition duct
C pw/branches _
U U
Figure 2. Non=Platinum
Supply Duct System
inthe floor or ceiling shall not be less than 235
square inches.
e. The total free area of openings in the floor or
ceifing registers serving the return air duct
system must be at least 352 sq. in. At least
one register should be located where it is not
likely to be covered by carpeting, boxes and
other objects.
f. Materials located in the return duct system
must have a flame spread classification of
200 or less. This includes a closet door ifthe
furnace is in a closet.
g. Noncombustible pans having I" upturned
flanges are located beneath openings in a
floor duct system.
h. Wiring materials located in the return duct
system shall conform to Articles 300=22 of
the National Electrical Code (ANSI CI/
NFPA=70).
19"_ I
I_13 1/4'_
10 1/4"
I
k
Top View
_, of Duct
"_ Connector
Figure 4.
Use Duct Connector
If "X" (Floor Cavity) is: Model Part Number:
English Metric (mm I Finger Tab Screw Down
7/8" 22 901987 904008
2" 51 901988 904009
4 1/4" 108 901989 904010
6 1/4" 150 901990 904011
8 1/4" 210 901991 904012
10 1/4" 260 901992 904013
12 1/4" 311 901993 904014
Table 5. Duct Connectors
FLOOR CAVITY
Z(depth equal to "X" in Figure 5 and Table 5)
X i, "1
I I:/ SUPPLY AIR DUCT
/
/(
Figure 3.

( )OPENING TO DUCT
(1) WITH PLATE (C) REMOVED
OPENING BECOMES
13-1/4" x 13-1/4"
(2) WITH PLATE (C) REMOVED
OPENING BECOMES
13"X 13" WITH REDUCER
ITIS 13"X 10-1/8"
SPACERS -m . E • I • I • I •-
(1) FINGER TAB DUCT CONNECTOR ONLY
(2) SCREW DOWN DUCT CONNECTOR ONLY
A
X SEE
y TABLE 5
Figure 5.
ALTFUEL
FUEL
HOLE
Figure 6. Closet or Alcove
i. Gas piping is not run in or through the return
duct system.
j. 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.
k. For floor return systems, the manufactured
home manufacturer shall affix a prominent
marking on or near the appliance where it
can be easily read when the closet door is
open. The marking shall read:
HAZARD OF ASPHY×IATmON: Do not
cover or restrict return air opening.
I. Air conditioning systems may require more
duct register and open louver area to ob-
tain necessary airflow. Use NORDYNE's
certiduct program to determine proper duct
size for AiC.
DUCTED RETURN AIR
M3 furnaces with model numbers ending in AW
or BW are factory configured for the return air
to flow through the front Iouvered door. The
return air may also be attached to either side or
the top of the furnace cabinet using a field
installed kit. Refer toTable 12 for the NORDYNE
ducted return kit PiN number. The location and
size of the side and top return air connections
are shown in Figure I. The filter size for the side
return air is 20" x 20" x I". For top return the
filter size is 24" x 16" x I".
M3 furnaces with model numbers ending in
BWT are factory configured for the return air to
enter the top of the furnace.

2-1/4
14-1/2
21-3/4
3-I14
1-1/4
ALT FUEL LINE
ENTRY
I
I
FLOOR CUT-OUT
FOR DUCT CONNECTIONS
I
12-7/8
15-1/2
FLOOR CUT-OUT
FOR OPTIONAL
COOLING COIL
FOR NON-PLATINUM
SERIES UNITS
8-19/32
1-3/4
f VENT
COMBUSTION AiR INTAKE
FUEL LINE ENTRY
1-3/4
OUTER DOOR
17-29/32
21-7/16
Figure 7. Cut-Out Locations
NR DiSTRiBUTiON SYSTEMS
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.
Three typical distribution systems are illus-
trated in Figure 2. Location, size, and number
of registers should be selected on the basis of
best air distribution and floor plan of the home.
DUCT CONNECTOR SELECTION
PLATINUM SERES
a. For Platinum ready construction use
the 14" round plenum, pin: 903896.
I0
NON-PLATINUM SERIES
a. Determine depth of floor cavity from
surface of floor to top of supply air duct
(See Figure 3).
b. Select appropriate model from Table 5
which matches X-dimension of the floor
cavity. To maximize air delivery, re-
move reducer "C" (see Figure 5) to
obtain the largest open area that will fit
the duct/floor construction.
DUCT iNSTALLATiON
Required floor, ceiling, and roof cut-out open-
ings must be carefully located to avoid mis-
alignment of the furnace (see Figures 6 & 7).
installation procedures are suggested for typi-
cal furnace installations and need not be fol-
lowed in the exact listed sequence.
CUT OUT FLOOR OPENING & FUEL LINE
HOLE
a. Determine center of closet or alcove (Fig-
ures 7 & 8).
b. Locate center of the floor opening, mea-
sured 10" from the rear wall, and mark cut-
out measuring approximately 14-I/2" by 14-
I/2" (+ I") for model duct connector used
(refer to Figures 4 & 5).
c. Locate center of gas line hole, measured 23-
I/4" from the rear wall and 6-5/8" to the left of
center of the floor cut-out (See Figure 6) or

5-I/4"totheleftofcenterofthefloorcut-out,
or for entrythroughright-sideof furnace
measured9"totherightofcenterofthefloor
cut-out.
d.Cutoutflooropeningandonegaslinehole.
CUT DUCTOPENING(FINGERTABBED
ONLY)
a.Placeductconnectorthroughtheflooropen-
ingwithbottomtabsrestingon top of the
supplyairduct.
b.Centerductconnectorandpushbackagainst
rearedgeofflooropening.
c. Markcut-outlocation(tabarea)andremove
ductconnector.
d.Cutoutductopening1/16"largerthanarea
marked.
INSTALLFURNACEMOUNTINGPLATE
a.Placemountingplate(suppliedwithinduct
connector)atrearoftheflooropening(See
Figure9).
INSTALLING PLATINUM SERIES 14"
ROUNDDUCTCONNECTOR
a.Placeductconnectorthroughtheflooropen-
ing.(SeeFigure9).
b.Secureductconnectortofloor.
INSTALLINGSCREWDOWNDUCTCON-
NECTOR
a.Applya beadof caulking,mastic,or other
approvedsealantaroundbottomsideofI/2"
flangeandrestrictorplate,whenapplicable.
b.Locatethe ductconnectoroverduct and
carefullylowerscrewdownductconnector
intoplace.
c. Onceduct connectoris locatedon duct,
temporarilyholdinplacewhilefasteningduct
connectortothefloorusingflatheadscrews
ornails.Besureflangesof ductconnector
stayincontactwiththeduct.
d.Screwplenumtoductmakingsureasealis
madebetweentheductandtheductcon-
MOUNTING REARWALL
FUEL
LINE
HOLES
Figure8. MountingPlate
BEND CONNEC _OR TABS
UNDER DUCT OPENING
Finger Tabbed
Duct Connectors Screw Down
Duct Connectors
MOUNTING
SCREWS
CONNECTION
Platinum Series
Figure 9. Duct Connector
11

nector.Additionalscrewsmaybe addedif
required.
e.Cutawayalongedgeofflangeallowingthe
centertodropintotheduct.Removesection
ofductwithcaution,asedgeswillbesharp.
INSTALLINGFINGERTABBEDDUCTCON-
NECTORS
a.Placeductconnectorthroughtheflooropen-
ingwithbottomtabsextendingthroughthe
ductopening.(SeeFigure9)
b.Secureductconnectorto floor.
c. Bendbottomtabsunderanduptightlyagainst
thesupplyairduct(SeeFigure10).
NOTE:Theductconnectorisdesignedforuse
onducts12"inwidth.Whenusingtheconnec=
toron12"wideducts,theremaybeinsufficient
clearancetobendthetabsontwosidesofthe
ductconnector,insuchcasesthetabsmaybe
attachedtothesidesoftheductbyusingsheet
metalscrewsorothersuitablefasteners.(See
Figure11).
ifsealant,mastic,ortapeisusedtoprovidea
betterseal,itshouldbeapprovedbyapplicable
nationalorlocalcodes.
ALTERNATEATTACHMENTMETHODS
Thisproceduremayalsobeusedto installa
furnace duct connector to narrow metal
ductworkwhereinsufficientclearanceprevents
bendingof the duct connectortabsat the
side(s)oftheduct.(SeeFigure12).
I. Scoreandcutthetopof themetalductas
indicatedin StepI or Step2. WithStepI
choice,alsocutoutthemetalfromtheshaded
area"A'.
2.Foldtheductflap"B"up,(SeeStep3).
12
STEP 1.
TABS TABS
DUCT _ DUCT
1. INSERT DUCTPLBNUM CONNECTOR 2. BEND BOTTOM TABS OVER
INTO DUCT CUT-OUT. AND ONTO THE UNDERNEATH
DUCTBERVtCE.
Figure 10. Installation of Duct Connector
Duct Connector i_
I
_) Duct
Figure 11. Narrow Duct Installation
_ Narrow Duct
Fold Back Flap "B"
Cut- Out Cut- Out
Area"A"
Top of Duct
Fold Back Flap "B"
STEP 2.
Fold Back Flap"B"
Cut
-- Fold Back Flap"B"
Bend Duct Connector Tabs Up
and Over- (along length of duct)
, ,/ \, ,
// "_k_ !LtC t
Staple Folded Duct
Flap (typ) to side of Duct
Connector .
_L_ Duct _--'_
STEP 4.
Figure 12. Alternate Installation

NOTE:Additionalfastenersmaybe usedat
rear,sidesorthroughdoorframe,asdesired,
tosecurefurnacetoclosetoralcoveframing.
VENTING AND COMBUSTION AiR
Figure 13. "A', "g', & Platinum
Cabinet Furnaces
SLIDE FURNACE
ALL THE WAY BACK
ONTO MTG PLATE
SECURE FURNACE _ q, -
•[, ' WFH 2 FASTENERS , ,
,', AT FRONT CORNER HOLES ' '
HOLES
Figure 14. "A" Cabinet Furnace on 911969
Coil Cabinet (NonoPmatinum Series)
3. At the front-to-back of duct run (Area "A'),
bend the duct tabs and secure them directly
to the duct.
4. At Area "B", bend the duct tabs up and back
over, around the duct connector, (See
Step 3).
5. Fold/form the duct flap against the side of the
duct connector and attach as shown, (See
Step 4). Use three (3) staples (minimum) on
each duct flap OR, if a 2X block/joist is not
provided, use two (2) sheet metal screws
(minimum) on each duct flap. An alternate
attachment method is acceptable, as long
as the plenum is securely attached.
6. Tape the duct flap edges with an approved
tape for a leak-free joint.
_NSTALL FURNACE
a. Remove furnace outer door(s) and bottom
fuel line knockout.
b. Place furnace onto duct connector and cen-
ter with floor opening.
c. Slide onto mounting plate. (Bottom rear slots
on furnace should engage with mounting
plate tabs.)
d. Secure front with one (1) fastener at each
corner (See Figure 13 or 14).
CAUTmON'.
Snow must not be allowed to restrict or
block the combustion air intake or vent
pipes.
General
NORDYNE condensing furnaces must be
installed with outdoor combustion air piped
directly to the furnace. Codes refer to this
type of installation as direct vent, or two pipe
installation.
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 Z223.1iNPFA-54). For Canadian
installations, requirements are specified in the
National Standard of Canada (CAN/CGA
B149.1 & .2). Consult local codes for special
requirements.
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 prematurely.
G:
The combustion air piping must not be
blocked or restricted in any manner.
WARNmNG:
Furnace installation using methods
other than those described in the
following sections must complywith the
National Fuel Gas Code and all
applicable local codes to provide
sufficient combustion air for the furnace.
13

Do not allow debris to fail into the fur-
nace. This could cause unsafe opera-
tion and voids the furnace warranty.
VENTING REQUIREMENTS
WARNmNG:
FURNACE MUST NOT BE COMMON
VENTED WiTH OTHER APPLIANCES.
Genera_
This section specifies installation requirements
for 2-pipe combustion air piping. The capacity
table provided in this section applies to the
maximum equivalent lengths of vent and
combustion air intake pipe.
These condensing furnaces are classified as
"Category IV" appliances, which require
special venting materials and installation
procedures. Category tV 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 6.
The furnace must be vented to the outdoors.
WARNmNG:
CARBON MONOXmDE POiSONmNG
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/OGA Bt49 mnstallation Codes
and these instructions. Determine
that there is no blockage or re-
striction, leakage, corrosion and
other deficiencies 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 fireplace 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
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, ANSt Z223.1/NFPA
54 an d/or CSA B I49.1, 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, fireplace dampers and any
other gas burning appliance to
their previous conditions of use.
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
14

APPLICATION
PVC,CPVC or ABS
SCH. 40 Pipe Size
Model M3RL 060
Model M3RL 080
MAXIMUM
DIRECT VENT, DUAL
PIPE LENGTH (ft.)*
Inlet/Outlet
3" 3"
50 50
50 50
*NOTES
1. Subtract 3.5ft. for each additional 3" 90degree elbow.
2. Two45degree elbowsare equivalent toone 90degree elbow
3 One short radius elbow is equivalent to two long radiu,_
elbows.
4. Donot include terrnination elbows incalculation ofvent length
5 This table is applicable for elevations from sea levelto 400(
ft. Forhigher elevations, decreasevent pipe lengthsby 8%pe
1000ft.of altitude
6 Only theabove pipematerialsare approved for usewith thes(
condensing furnaces.
Tabie 6. Vent Tabie
/
/
/
/
/
/
_J VENT TERMINAL (_ AiR SUPPLY INLET [] AREA WHERE TERMINAL iS NOT PERMITTED
A = Clearance above grade, veranda, porch,
deck, or balcony
B = Clearance to window or door that may be
opened
C = Clearance to permanently closed window
D=Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (61 cm) from
the center tine of the terminal
E = Clearance to unventilated soffit
F = Clearance to outside corner
G = Clearance to inside corner
H = Clearance to each side of center tine
extended above meter/regulator assembly
I = Clearance to service regulator vent outlet
J = Clearance to nonmechanicaI air supply inlet
to building or the combustion air inlet to any
other appliance
Canadian Installations 1
12 inches (30 cm)
K = Clearance to a mechanical air supply inlet
L = Clearance above paved sidewatk or paved 7 feet (2.13 m) 1
driveway located on public property
M= Clearance under veranda, porch deck, or 12 inches (30 cm) $
balcony
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)
3 feet (91 cm) within a height 15 feet
above the meter/regulator assembly
3 feet (1.83 m)
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 feet (1.83 m)
US Installations 2
12 inches (30 cm)
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) fol
appliances > 50,000 Btuh (15 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) fol
appliances > 50,000 Btuh (15 kW)
3 feet (91 cm) above if within 10 feet (3 m)
horizontally
In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code
2 In accordance with the current ANSI Z223.1 /NFPA 54 National Fuel Gas Code
1 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dweltings
_: Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* For clearances not specified in ANSI Z223.! /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 15. Vent Termination Clearances for Direct Vent Furnaces
15

escapethroughsuchappliancesorvents.Do
notventthefurnacetoafireplacechimneyor
buildingchase.
if removingan existingfurnacein a venting
system,theventingsystemmaynotbeproperly
sized.Totesttheventsystemwiththeremaining
appliances,followthetestoutlinedbelow.
CAUTmON'.
Combustion air must not be drawn from
occupied spaces and a corrosive
atmosphere.
The following steps shall be followed with each
appliance connected to the venting system
placed in operation, while any other appliances
connected to the venting system are not in
operation:
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.
Vent Pipe Material
Vent and combustion air pipe and fittings 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
Cement and primer must conform to ATSM
Standard D2564 for PVC and Standard D2235
for ABS. When joining PVC piping to ABS, use
an appropriate solvent cement and procedure
per the piping manufacturer's recommendation
and ASTM Standard D3138.
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 length limitations per
Table 6. 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. 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 flows back to the furnace
where it can be disposed of through the
condensate disposal system.
Piping must be mechanically supported so that
its weight does not bear down on the furnace.
Supports must be at intervals no greater than
five feet, and at smaller intervals if necessary
to ensure that there are no sagging sections
to trap water (See Figures 16 & 17).
These condensing furnaces have been
certified 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
Vent and combustion air intake terminations
must be located to ensure proper furnace
operation and to conform to applicable codes.
Figure 15 illustrates necessary distances from
the vent termination to windows and building
air intakes. In Canada, the Canadian Fue!
Gas Code takes precedence over these
instructions. Specifically, all minimum
distance requirements with respect to
term!nation of the vent piping listed below.
The following list is a summary of vent terminal
location requirements:
I. 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 direct vent
(2-pipe) installation from any door,
openable window, or air gravity inlet is I ft.
below, 1 ft. horizontally, or 1 ft. above.
3. The vent termination shall be a minimum of
3 ft. above any forced air inlet within 10 ft.
4. The vent termination shall be located at
least 4 ft. horizontally from any electric
meter, gas meter, regulator and any relief
equipment. These distances apply ONLY
to U.S. installations, in Canada, the Cana-
dian Fuel Gas Code takes precedence.
16

Downflow Furnace
Seal/Cat_lk I_
Around Pipe
at Building \\\\\\
90 ° Elbow _ \
\\
f
Normal Snow Level
Vent _ _!3 9/1E"_
÷i 7,8
Combustion
Al ,oto,oO,po l i i
Straps or Other Suitable _ __-_j ___Z
Supports at Minimum of
5 ft. Intervals
' Top View
iq
Combustion Air
Intake Pipe
Offset with
Vent for Adequate
Dirnensiona_ C}eara#ce
Exhaust
Vent
PVC or
ABS pipe
Figure 16. Horizontal Venting
Support System
on Vertical Rise
Below Joints
¢//_ Vent
First support should be as
close to furnace es possible
Vent
Upward Pitch
t/4" per foot
.
Figure 17. Vertical Venting
Avoid areas where condensate drainage
may cause problems by dropping on plant_
ers or patios, etc. Also ensure that ex_
haust gases will not impinge on windows
or building surfaces, which may be com_
promised 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 termi-
nate above any public walkways.
6. Select the point of wall penetration where
the minimum I/4 inch per foot of slope up
can be maintained.
CAUTmON'.
For optimal performance vent furnace
through wall which experiences the least
exposure to winter winds.
17

Horizontal Venting
Vent and combustion air intake terminations
must be as shown in Figure 19 unless the
concentric vent termination kit is used.
NG:
Ensure that the combustion air vent and
the exhaust vent are configured as
shown in Fig. t9. Improper vent
termination can cause recirculation of
the flue gases. This may result in furnace
vibration, in severe cases, the furnace
will cycle, due to the intermittent contact
between the flame and the flame sensor.
If you note these oscillations occurring,
check the vent configuration. Make sure
that the exhaust vent does not have a 90
degree termination.
For horizontal venting, either the Horizontal
Exterior Vent Mounting Kit or the Concentric
Vent Termination Kit may be used (See Table
12).
For Canadian installations please refer to the
Canadian Installation Code (CAN/CGA-B149.1
or 2) and/or local codes.
The HorizontaJ Exterior Vent Mounting Kit con-
sists of two face plates and an insulating gas-
ket to seal the exterior surface. A hole sized
closely to the pipe diameter must first 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 fitting standard cou-
plings. The face plates are retained on both
sides of the waJJ by the couplings, and the
gasket is retained against the wail by the outer
face plate. Face plates must be fastened to the
walJ and the outside one must be flashed as
appropriate to prevent entry of water.
When the above kits are not used the following
steps are required:
I. Check the hole size cut through the exte-
rior 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 I" and seal the area be-
tween the wall and pipe.
3. 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.
4. Insure the combustion air inlet pipe has a 90
degree termination elbow, and is pointing
downward as shown in Figures 19 & 20.
Note that a combustion air intake must be
provided with an elbow opening downward.
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 18.
Insulation is required to prevent freezing of this
section of pipe.
Vertical Venting
For verticaJ venting, either the configuration
shown in Figure 20 or the Concentric Vent
Termination Kit may be used. Vertical venting is
one of the shortest routing methods when
piping vents for furnaces. The M3 furnace
operates trouble-free when the furnace is in-
stalled with a shorter vent.
oThe inlet for the combustion intake pipe must
be extended at least one foot above the roofline
or snow accumulation level.
oThe outlet of the vent must be extended at least
10 inches above the inlet of the combustion air
intake pipe.
, The vent as well as the combustion air intake
pipe should be located on the same side of the
reel Both pipes must not be closer than 5
inches apart. They should not be separated
more than 36 inches.
The roof penetration must be properly flashed
and waterproofed with a plumbing roof boot or
equivalent flashing. Termination spacing re-
quirements from the roof and from each other
must be per Figure 20.
Concentric Vent Terminatien
A concentric vent termination is approved for
use with these furnaces (See Table 12). For
proper installation of the concentric vent termi-
nation, follow the installation instructions pro-
vided with the kit.
18

Vent Configuration to
Provide 12" Minimum
height above <7_
Snow Level. \ 12" Min.
I 19" Nax.
i
Outside _ Support
WaEI _J
i_ 1/2"
// /_ Armaflex
f/ 4
S _ Bnsulationor
,:_ Equivalent
'_..............................._ (if required)
12"Above
NormaHy
Expected
Snow
Level
Figure 18. A_ternate Horizontam
Vent Installation
DRAINAGE OF CONDENSATE
FROM FURNACE
NG:
The condensate produced by the furnace
must be drained. Do not connect awater
suppmy to the drainage hose of the
furnace.
NOTE: The condensate drain should be pro-
tected from freezing when in unheated spaces.
The furnace is supplied with an internal conden-
sate drain trap.
Exhaust Vent
Figure 19. Exhaust and Combustion Air
Pipe Clearances
CAUTION'.
Do not install additional traps in the
condensate drain.
The condensate drain may exit through the left
side panel, the right side panel, or through the
left or right hole on the bottom panel. (See Figure
21). Ensure that the flexible drain hose is not
kinked.
The condensate should drain from the plastic
collector box (location A in Figure 21) as drop-
lets 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.
A= 12" Above Roof or s-Min.
36" l*_ax.
Snow Accumulation Level
Elbow
Bxheust
Plumbing Vent
Roof Boot
(Typ. Both Pipes)
Note: If terminations meet-
ing these vertical require-
ments exceed the maximum
height for safe transit, the
vent and combustion air in-
takes may be shipped with
the home for assembly on
site. The furnace must be
labeled to notify the installer/
user not to use the furnace
until the vent and combus-
tion air intake terminations
are installed.
Figure 20. Vertical Vent Termination 19

direction
Figure 21. Furnace with Condensate Drain Trap Assembty
I. Remove the collector box soft tube at
location A in Figure 21 and insure the exit
from the collector box is clear of any
debris or obstructions.
2. Replace this tube and insure the fit to the
header spout is air tight. Airwill 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.
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 (See Table 12). Proper
drains and connections to the condensate tub=
ing 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
General
This furnace is equipped for bottom, left, or
right side gas entry. Typical gas service hook=
ups are shown in Figure 22. 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 ofa manual
main shut=offvalve and ground joint union exter=
hal to the furnace. The shut=off valve should be
readily accessible for service and/or emer=
gency 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 instal=
lation must comply with the provisions stated in
the Federal Manufactured Home Standard
(H.U.D Title 24, part 280) and the National Fuel
Gas Code (ANSI Z223.1!NFPA=54) or (CAN/
CGA B149) installation codes.
A drip leg should be installed in the vertical pipe
run to the unit. Table 7 lists gas flow capacities
for standard pipe sizes as a function of length
in typical applications based on nominal pres=
sure drop in the line.
NOTE: Gas piping must not be run inor through
air ducts, gas vents, etc.
Compounds used on threaded joints of gas
piping must be resistant to the actions of Iique=
fled petroleum gases.
CAUTmON'.
Do not use matches, lighters, candles,
or other sources of open flame to check
for gas leaks.
NOTE: When pressure testing gas supply
lines at pressures greater than I/2 psig (14 in.
water column), the furnace must be discon-
nected from the gas supply piping system to
prevent damage to the gas control valve.
2O