Nordyne Furnace M1B User Manual

Downflow, Direct Vent (Sealed Combustion)  
Forced Air Gas and Oil Furnaces  
Owners Manual/Installation Instructions  
Series M1B, M1G, M1M and M1S  
For installation in:  
1. Manufactured Homes  
2. Recreational Vehicles, Park Models,  
Manufactured Buildings  
3. Modular Homes/Buildings  
!
WARNING:  
If the information in this manual is not  
followed exactly, a fire or explosion  
may result causing property damage,  
personal injury or loss of life.  
– Donotstoreorusegasolineorother  
flammablevaporsandliquidsinthe  
vicinity of this or any other appli-  
ance.  
– WHAT TO DO IF YOU SMELL GAS  
• Do not try to light any appliance.  
• Do not touch any electrical switch;  
do not use any phone in your build-  
ing.  
• Immediately call your gas supplier  
fromaneighbor’sphone.Followthe  
gas supplier’s instructions.  
• If you cannot reach your gas sup-  
plier, call the fire department.  
– Installationandservicemustbeper-  
formed by a qualified installer, ser-  
vice agency or the gas supplier.  
!
WARNING:  
Improper installation, adjustment, al-  
teration, service or maintenance can  
cause injury or property damage. Re-  
fer to this manual. For assistance or  
additionalinformationconsultaquali-  
fied installer, service agency or the  
gas supplier.  
!
WARNING:  
Should overheating occur, or the gas  
supply fail to shut off, shut off the  
manual gas valve to the appliance  
before shutting off the electrical sup-  
ply.  
LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
NORDYNE originated the sealed combustion  
system, which separates the furnace combus-  
tion system from the living area of the home,  
now a standard for the manufactured home  
industry.  
!
WARNING:  
Do not use this appliance if any part  
has been submerged under water.  
Immediately call a qualified service  
technician to inspect the appliance  
and to replace any part of the control  
system and any gas control that has  
been submerged underwater.  
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.  
NOTICETOINSTALLER  
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 instal-  
lation may create hazardous conditions, and  
will void the appliance warranty.  
Follow the instructions in this booklet carefully  
and this appliance will provide many years of  
superior performance.  
If you wish to cool your home automatically with  
a central air conditioning system investigate the  
excellent NORDYNE cooling systems avail-  
able from your heating and cooling contractor.  
These systems are designed to work best with  
your NORDYNE furnace and have been care-  
fullyengineeredtodeliveroptimumperformance  
when mated with NORDYNE manufactured  
home furnaces.  
1.SPECIFICATIONS  
General Description  
M1 Series gas and oil furnaces are listed direct  
vent (sealed combustion), downflow heating  
appliances for manufactured (mobile) homes,  
recreational vehicles, and for use in residential/  
modular/commercial construction. The furnace  
must be located so that venting can be properly  
achieved.  
NORDYNE also offers water heaters, fire-  
places and ventilating systems specifically de-  
signed for manufactured housing applications.  
Check with your manufactured home retailer,  
your heating and cooling contractor or your  
distributor for information. Write directly to the  
factory (PO Box 46911, St. Louis, MO 63146)  
if you are not able to locate a source for  
NORDYNE manufactured housing products in  
your area.  
Airconditioningmaybeaddedtostructureswith  
M1 series furnaces using Platinum series air  
conditioning or conventional units. This Instal-  
lation Instruction manual includes special re-  
quirements for incorporation of air conditioning  
equipment to the M1 series of furnaces.  
Multi-speed blower assemblies as shown in  
Table 3 have been certified for field installation  
in M1 Series furnaces. An air conditioner can be  
easily field installed with M1GH Series furnaces  
if used in conjunction with certified 2-wire relay  
box,p/n903092Aor4/5wirerelaybox902898A.  
3.MANUFACTURERWARRANTY,  
OWNER’SRESPONSIBILITIES  
It is the sole responsibility of the homeowner to  
make certain the gas furnace has been cor-  
rectly set up and converted to the proper fuel  
(L.P. gas or Natural gas) and adjusted to oper-  
ate properly. All gas furnaces are manufac-  
tured for Natural gas and must be field con-  
verted when using L.P. gas.  
2.OWNERINFORMATION  
ABOUTYOURCENTRAL  
FURNACESYSTEM  
NORDYNE has been involved in the design of  
products for the manufactured home industry  
since the first manufactured home or trailer was  
built.  
A warranty certificate with full details is included  
with these instructions. However, NORDYNE  
will not be responsible for any costs found  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
necessary to correct problems due to improper  
setup, improper installation, furnace adjust-  
ments, improper operating procedure on the  
part of the user, etc.  
5. Correcting problems due to improper gas  
supply pressure to the furnace.  
6. Providing instructional training on how to  
light and operate the furnace.  
7. Furnace problems caused by installation of  
an air conditioner, heat pump or other air  
comfort devices.  
Some specific examples of service calls which  
cannot be included in warranty payments are:  
8. Adding a Roof Jack extension because of  
unusual wind and/or snow conditions.  
9. Revising installation of the furnace flue as-  
sembly (Roof Jack).  
10. Adjusting or calibrating of thermostat.  
11. Any construction debris which falls into flue  
system.  
1. Converting the furnace to use another type  
of gas.  
2. Repairing duct work in the home found to be  
faulty.  
3. Correcting wiring problems in the electrical  
circuit supplying the furnace.  
4. Resetting circuit breakers, blown fuses or  
other switches.  
Furnace  
Input  
Output  
Orifice No  
E.S.P.  
Pilot  
Burner  
Ignitor  
Direct  
Comb.  
Blower  
Motor A/C Ready  
Model No MBtu/h MBtu/h Nat.  
LP  
45  
45  
45  
45  
42  
42  
42  
42  
40  
40  
40  
40  
36  
36  
36  
36  
45  
45  
45  
45  
42  
42  
42  
42  
40  
40  
40  
36  
36  
36  
43  
43  
43  
37  
37  
In WC  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
0.3  
Hp  
1/8  
1/4  
1/2  
3/4  
1/5  
1/4  
1/2  
3/4  
1/4  
1/4  
1/2  
3/4  
1/4  
1/4  
1/2  
3/4  
1/8  
1/4  
1/2  
3/4  
1/5  
1/4  
1/2  
3/4  
1/4  
1/2  
3/4  
1/4  
1/2  
3/4  
1/5  
1/4  
1/2  
1/4  
1/2  
1/5  
1/4  
1/2  
1/4  
1/2  
Tons  
2*  
3
M1GH 056  
M1GB 056  
M1GC 056  
M1GD 056  
M1GH 070  
M1GB 070  
M1GC 070  
M1GD 070  
M1GH 077  
M1GB 077  
M1GC 077  
M1GD 077  
M1GH 090  
M1GB 090  
M1GC 090  
M1GD 090  
M1MA 056  
M1MB 056  
M1MC 056  
M1MD 056  
M1MA 070  
M1MB 070  
M1MC 070  
M1MD 070  
M1MB 077  
M1MC 077  
M1MD 077  
M1MB 090  
M1MC 090  
M1MD 090  
M1BA 066  
M1BB 066  
M1BC 066  
M1BB 086  
M1BC 086  
M1SA 066  
M1SB 066  
M1SC 066  
M1SB 086  
M1SC 086  
56  
56  
56  
56  
70  
70  
70  
70  
77  
77  
77  
77  
90  
90  
90  
90  
56  
56  
56  
56  
70  
70  
70  
70  
77  
77  
77  
90  
90  
90  
66  
66  
66  
86  
86  
66  
66  
66  
86  
86  
45  
45  
45  
45  
57  
57  
57  
57  
62  
62  
62  
62  
72  
72  
72  
72  
46  
46  
46  
46  
57  
57  
57  
57  
62  
62  
62  
72  
72  
72  
53  
53  
53  
68  
68  
54  
54  
54  
71  
71  
29  
29  
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
29  
4
29  
5
2½*  
3
4
5
3*  
3
24  
24  
24  
24  
21  
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
21  
21  
4
5
21  
17  
3*  
3
17  
17  
4
17  
5
29  
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
2
29  
3
29  
4
29  
5
24  
2½  
3
24  
24  
4
24  
5
21  
3
21  
4
21  
5
17  
3
17  
4
17  
5
26  
2½  
3
26  
26  
4
18  
3
18  
4
.50 Gph  
.50 Gph  
.50 Gph  
.65 Gph  
.65 Gph  
2½  
3
Burner Model  
AF-10 Nozzle  
Spray Angle  
80° A  
4
3
4
Electrical Supply - 120 volts, 60HZ, 1 Ph.  
Fuse or Breaker - 15 amps  
Thermostat Circuit - 24 volts, 60HZ, 30 vac  
Normal Anticipator Setting - 0.4  
Temperature Rise - 45° to 75°F  
Manifold Pressure - Natural Gas: 3.5” w.c.  
LP Gas: 10” w.c.  
*Blower capacity only - needs relay box for AC  
High Altitude - See Table 11. For Canadian  
High Altitude (2,000’ to 4,500’), reduce the  
gas manifold pressure to 3.0” W.C. for  
natural gas and to 8” W.C. for LP gas.  
Table 2. M1 Furnace Specifications  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
Blower / Motor Assembly  
A/C Capacity  
Ton  
2, 2½ & 3  
2, 2½, 3 & 4  
2, 2½, 3, 4 & 5  
Part No.  
Blower Wheel  
10 x 8  
Motor-Hp  
1/4  
903773  
903413  
903414  
11 x 8  
1/2  
11 x 8  
3/4  
Table 3. Field Installation Blower Assemblies  
Carefully review these responsibilities with your  
manufactured housing dealer, service com-  
pany or gas supplier so there will be no misun-  
derstanding at a later time.  
6" (152 mm)  
Top Clearance  
!
Removable access  
panel should be  
CAUTION:  
0" Side  
installed above  
Clearance  
to Furnace  
Cabinet  
furnace door frame  
to access roof jack  
• Never attempt to alter or modify this  
furnace or any of its components.  
• Never attempt to repair damaged or  
inoperablecomponents.Suchaction  
couldcauseunsafeoperation,explo-  
sion, fire and/or asphyxiation.  
Nearest  
Wall or  
Partition  
• If a malfunction has occurred, or if  
you feel that the furnace is not oper-  
atingasitshould,contactaqualified  
service agency or gas utility for as-  
sistance.  
Figure 2. Alcove Installation  
Provide min. 235  
sq. in. (1516 cm2)  
open free area in  
front or side wall  
6" (152 mm)  
Top Clearance  
or  
In closet  
door  
located  
at top,  
center  
or bottom  
4.INSTALLATIONSTANDARDS  
0" Side  
Clearance  
to Furnace  
Cabinet  
Installershallbefamiliarwithandcomplywithall  
codes and regulations applicable to the instal-  
lation 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.  
CLOSET DOOR  
Figure 3. Closet Installation  
“A”- 56"  
Provide min. 250  
sq. in. (1613 cm 2)  
open free area in  
front or side wall  
6" (152 mm)  
Top Clearance  
or  
in closet  
“B”- 76"  
“A” Model-  
w/o Coil Cabinet  
door  
a fully  
louvered  
door may  
be used  
0" Side  
“B” Model-  
w/Coil Cabinet  
Clearance  
to Furnace  
Cabinet  
23 3/4"  
CLOSET DOOR  
19 3/4"  
Figure 4. Special 1” Clearance  
Figure 1. Overall Dimensions  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
a. Federal Manufactured Home Constructions  
& Safety Standard (H.U.D. Title 24, Part  
3280.707[a][2])  
b. American National Standard (ANSI-119.2/  
NFPA-501C) for all recreational vehicle in-  
stallations.  
c. American National Standard (ANSI-Z223.1/  
NFPA-54) and/or CAN/CGA B149 for all gas-  
fired furnace models.  
6.MINIMUMCLEARANCES  
This heating appliance must be installed with  
clearances not less than the minimums shown  
in Table 4. This heating appliance must be  
installed with ample clearance for easy access  
to the air filter, blower assembly, burner assem-  
bly, controls, and vent connections.  
a. Alcove installations (see Figure 2): minimum  
18" clearance at front of furnace shall be  
provided for future servicing. A removable  
access panel should be installed between  
top of the furnace door frame and the ceiling.  
b. Closet installations must use a louvered door  
having a minimum free area of 235 sq. in.  
when located 6" from furnace (See Figure 3)  
or 390 sq. in. for 5 ton ready M1 furnaces. For  
special clearance between 1" and 6", re-  
quirements are a louvered door with a mini-  
mum of 250 sq. in. free area, with the open-  
ingsintheclosetdoorinlinewiththelouvered  
openingsinthefurnacedoor. Afullylouvered  
closet door may be used (See Figure 4 and  
section 7.i. to evaluate compliance with this  
requirement).  
d. American National Standard (ANSI-Z95.1/  
NFPA-31) and/or CSA B139 for all oil-fired  
furnace models.  
e. American National Standard (ANSI-C1/  
NFPA-70) and/or CSA 22.1 Canadian Elec-  
tric Code Part 1 for all electrical field wiring.  
f. Units have been investigated under stan-  
dards UL 307A & B, UL727-1999, ANSI  
21.47a-CAN/2.3a-1995, andCSAB140.10.  
5.UNITLOCATION  
The furnace shall be appropriately located to  
the supply and return air distribution system.  
(See “AIR DISTRIBUTION”, Page 8) Sides and  
back of the furnace may be enclosed by wall  
framing. (See “Minimum Clearances,” Table 4,  
and Figures 2 through 5.)  
7.RETURNAIRPROVISIONS  
The furnace installation is only intended for free  
air return through the furnace door louvers. DO  
NOT connect a ducted return air system di-  
rectly to the furnace. Improper installation may  
createahazardanddamageequipment, aswell  
as void all warranties.  
U.S.A. home manufacturers shall comply with  
allofthefollowingconditionstohave acceptable  
return air systems for closet installed forced air  
heating appliances:  
!
CAUTION:  
Furnace may be installed on combustible floor-  
ing when using NORDYNE Duct Connectors  
(see Section 10).  
HAZARD OF ASPHYXIATION: Nega-  
tive 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.  
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.  
A Single trunk duct  
ALL MODELS  
Front  
Back  
Sides  
Roof Jack  
CLOSET  
ALCOVE  
6"  
0"  
0"  
0"  
6"  
0"  
18"  
0"  
0"  
0"  
6"  
0"  
Dual trunk duct  
B
w/crossover connector  
Top  
Top and Sides of Duct  
Bottom of Duct  
B Cabinet  
A Cabinet (w/ coil box)  
A Cabinet (w/o coil box)  
Transition duct  
w/branches  
C
0"  
0"  
1/4"  
0"  
0"  
1/4"  
Figure 5. Non-Platinum  
Supply Duct System  
Table 4. Minimum Clearances  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
f. Noncombustible pans having 1" upturned  
flanges are located beneath openings in a  
floor duct system.  
a. Regardless of the location, the return air  
opening into the closet shall not be less than  
specified in the appliance’s listing.  
g. Wiring materials located in the return duct  
system shall conform to Articles 300-22 of  
theNationalElectricalCode(ANSIC1/NFPA-  
70).  
b. Means shall be provided to prevent inadvert-  
ent closure by a flat object placed over the  
returnairopeningwhenitislocatedinthefloor  
of the closet (versus the vertical front or side  
wall).  
ROOF JACK  
c. The cross-sectional area of the return duct  
system leading into the closet, when located  
inthefloororceilingshallnotbelessthan235  
square inches (or 390 square inches for 5 ton  
ready M1 Furnaces).  
SLANT DECK  
FLASHING  
PITCHED  
ROOF  
d. The total free area of openings in the floor or  
ceiling registers serving the return air duct  
system must be at least 235 sq. in. At least  
one register should be located where it is not  
likely to be covered by carpeting, boxes and  
other objects.  
"X" (SEE TABLE 1)  
CEILING  
CAVITY  
"A"  
ROOF  
OPENING  
Flue Pipe  
CEILING  
Combustion  
"B"  
Air Pipe  
e. 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.  
Furnace  
56" or 76"  
Approx. Length  
Model Number  
Below Flashing  
15" - 23"  
(F,S)AW(T)1523-(0,2,4)(A,S)  
(F,S)AW(T)2135-(0,2,4)(A,S)  
(F,S)AW(T)2747-(0,2,4)(A,S)  
(F,S)AW(T)3563-(0,2,4)(A,S)  
(F,S)AW(T)5195-(0,2,4)(A,S)  
Figure 6. Roof Jack Assemblies  
21" - 35"  
27" - 47"  
ROOF JACK  
35" - 63"  
51" - 95"  
SLANT DECK  
S AW  
T
47 - 2  
S
FLASHING  
27  
PITCHED  
ROOF  
FLUE STEEL TYPE  
A= ALUMINIZED  
S=STAINLESS  
F= FLAT FLASHING  
S= SLANT FLASHING  
MIN. ADJ.  
LENGTH  
FLASHING  
PITCH/12" RISE  
0=FLAT  
2=2.5/12  
4=4/12  
TYPE:  
"X" (SEE TABLE 6)  
CEILING CAVITY  
BLANK=NON-TRANSIT  
T= TRANSIT MODE  
MAX. ADJ.  
LENGTH  
AW= ALL WEATHER  
All Weather Roof Jack Assemblies  
CEILING  
ROOF OPENING  
CEILING OPENING  
MODEL  
NUMBER  
APPROX. ADJ.  
LENGTHS*  
BELOW FLASHING  
13" - 23"  
Figure 7. Example of Flat Jack  
with Flashing  
FO1323 -5  
FO2343 -5  
SO1835 -5  
SO2447 -5  
SO3263 -5  
SO4895 -5  
SOT2442 -5  
SOT2745 -5  
SOT4581 -5  
FOT2846 -5  
23" - 43"  
18" - 35"  
24" - 47"  
32" -63"  
48" - 95"  
24" - 42"  
27" - 45"  
45" - 81"  
ROOF JACK WITH  
2 1 2 /12 SLANT  
FLASHING  
28" - 46"  
S
O
T
27 45 -5  
21  
SLANT DECK  
2 /12  
T= TRANSIT  
MODE  
S= SLAT FLASHING  
F= FLAT FLASHING  
5 = 5" FLUE DIA.  
TYPE  
MAX. ADJ.LENGTH  
5/12 ROOF SLOPE  
O= TYPE; STANDARD  
H= HIGH WIND  
A= ARCTIC ROOF JACK  
MIN. ADJ.  
LENGTH  
Figure 8. Example of 2½/12 Slant Jack  
with Flashing  
Table 5. Roof Jack Assemblies  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
h. Gas piping is not run in or through the return  
duct system.  
b. F=Flat Flashing; flexes from 0/12 to 1/12 roof  
slope.  
i. 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.  
j. 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 A/C.  
c. S=SlantFlashing.2.5/12Slopeflexesfrom1/  
12 to 4/12 roof slope, 4/12 flexes from 3/12  
to 5/12.  
d. Stainless steel roof jacks are available.  
e. If the roof jack crown is covered or blocked  
with snow, the furnace will not operate prop-  
erly. If the home is located in regions where  
snow accumulation exceeds 7” (HUD  
snowload zones) use an external roof jack  
extension p/n 901937.  
f. M1 furnaces may be used with roof jacks as  
tall as 170” (except M1M 056 & M1B 066  
models,whicharelimitedto120”).Aninternal  
roof jack extension (p/n 901935 - 10”, p/n  
903107 - 18”) can be used to increase roof  
jack height. All connections inside the home  
must be made below the ceiling.  
8.AIR 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.  
These extensions are available as optional  
accessories and may be purchased through  
your NORDYNE distributor.  
Location, size, and number of registers should  
be selected on the basis of best air distribution  
and floor plan of the home.  
USE SLANT DECK  
FLASHING NO.  
!
CAUTION:  
IF ROOF PITCH IS:  
"X" FACTOR IS:  
"F Series Roof Jack  
HAZARD OF ASPHYXIATION: Do not  
cover or restrict return air opening.  
2" in 12"  
2-1/2" in 12"  
3" in 12"  
3-1/2" in 12"  
4" in 12"  
903893 (2.5/12)  
903893 (2.5/12)  
903894 (3/12)  
903894 (3/12)  
903895 (4/12)  
2-1/8"  
2-1/2"  
2-7/8"  
3-1/4"  
3-5/8"  
"S" Series Roof Jack (2.5/12 Pitch only)  
9.ROOFJACKSELECTION  
Note: Install only Roof Jack Assemblies listed  
in Table 5 on this heating appliance.  
4-1/2" in 12"  
903895 (2.5/12)  
903895 (2.5/12)  
903894 (3/12)  
903894 (3/12)  
903895 (4/12)  
2-1/8"  
5" in 12"  
5-1/2" in 12"  
6" in 12"  
2-1/2"  
2-7/8"  
3-1/4"  
3-5/8"  
6-1/2" in 12"  
a. Determine depth of ceiling cavity from center  
of roof opening to center of ceiling opening.  
(See Dimension “A” in Figure 6.)  
Optional Deck Flashings for Flat and 2.5/12 Pitch  
RoofJacks.  
(4/12PitchRoofJacksnotapplicable.)  
b. Determine ceiling height and subtract height  
of furnace. (See Dimension “B” in Figure 6.)  
c. AdddimensionsA+B(andXfromTable6and  
Figure 7 if slant deck flashing is used). The  
total length of (A + B + X) must be within the  
minimum and maximum range of one of the  
Roof Jacks listed in Table 5.  
Table 6. Slant Deck Flashings  
Use Duct Connector  
Model Part Number:  
Finger Tab Screw Down  
901987 904008  
If "X" (Floor Cavity) is:  
English  
7/8"  
Metric (mm)  
22  
51  
2"  
901988  
901989  
901990  
901991  
901992  
901993  
904009  
904010  
904011  
904012  
904013  
904014  
APPLICATION NOTES:  
4-1/4"  
6-1/4"  
8-1/4"  
10-1/4"  
12-1/4"  
108  
159  
210  
260  
311  
a. FAW, FAWT, SAW and SAWT Series Roof  
Jacks with a 5" diameter inner vent pipe may  
be used with all models of M1 Series gas and  
oil furnaces.  
Table 7. Floor Cavity Sizes  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
b. Select appropriate model from Table 7  
which matches X-dimension of the floor  
cavity. To maximize air delivery, re-  
move reducer “C” (see Figure 11) to  
obtain the largest open area that will fit  
the duct/floor construction. Screw down  
duct connector opening to duct without  
reducer is 13” x 13”. With reducer it is  
13” x 10-1/8”.  
10. DUCTCONNECTORSELECTION  
PLATINUM SERIES  
a. For Platinum ready construction use  
the 14” round duct connector, p/n:  
903896.  
NON-PLATINUMSERIES  
a. Determine depth of floor cavity from  
surface of floor to top of supply air duct  
(See Figure 9).  
FLOOR CAVITY  
(depth equal to "X" in Figure 11 and Table 7)  
x
SUPPLY AIR DUCT  
Figure 9.  
19”  
TopView  
of  
FingerTab  
Duct  
13 1/4"  
10 1/4"  
Connector  
Figure 10.  
*OPENING TO DUCT  
REDUCER  
WITH PLATE (C) REMOVED  
OPENING BECOMES  
13-1/4” x 13-1/4”  
*FELT-SEAL  
SPACERS  
C
SEE  
X
TABLE 7  
*INDICATES FINGER TAB DUCT CONNECTOR ONLY  
Figure 11.  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
C
L
CEILING AND ROOF  
OPENINGS  
13-1/2"  
C
L
REAR W  
ALL  
ALT. FUEL  
LINE HOLES  
10"  
C
L
C
L
FLOOR  
OPENING  
23 -1/4"  
FUEL LINE  
HOLE  
Figure 12. Closet or Alcove  
20"  
14-1/2"  
C
L
2-3/4"  
REAR WALL OF CLOSET OR ALCOVE  
FLOOR CUT-OUT  
FOR DUCT CONN.  
CEILING  
C
L
CUT-OUT FOR  
FLUE AND  
ROOF JACK  
(See Fig 12)  
FLOOR CUT-OUT  
FOR OPTIONAL  
COOLING COIL  
FUEL-LINE  
3/4"  
C
L
FOR NON-PLATINUM  
SERIES UNITS  
C
L
2"  
1-1/4" D.  
ALT FUEL-LINE  
ENTRY  
10"  
1-3/4"  
FURNACE  
OUTER DOOR  
12-7/8"  
14-3/4"  
15-1/2"  
Figure 13. Cut-Out Locations  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
5-1/4" to the left of center of the floor cut-out,  
or for entry through right-side of furnace  
measured 9" to the right of center of the floor  
cut-out.  
11. INSTALLATION  
Required floor, ceiling, and roof cut-out open-  
ings must be carefully located to avoid misalign-  
ment of the furnace and Roof Jack (see Figures  
12 & 13). Installation procedures are suggested  
for typical furnace installations and need not be  
followed in the exact listed sequence.  
d. Cut out floor opening and one fuel line hole.  
!
IMPORTANT:  
CUT OUT FLOOR OPENING & FUEL LINE  
HOLE  
a. Determine center of closet or alcove (Figure  
13).  
b. Locate center of the floor opening, measured  
10" from the rear wall, and mark cut-out  
measuring approximately 14-1/2" by 14-1/2"  
( 1”) for model duct connector used (refer  
to Figures 10 & 11).  
c. Locate center of fuel line hole, measured 23-  
1/4" from the rear wall and 6-5/8" to the left of  
center of the floor cut-out (See Figure 12) or  
Refer to the installation instructions  
providedwithoptionalairconditioning  
packageswheninstallingfurnaceswith  
optional cooling coil cabinet or with  
optional C***-series indoor coils.  
CUT OUT CEILING AND ROOF OPENINGS  
a. Locate center of Roof Jack opening, mea-  
sured 13 1/2" from the rear wall of closet or  
alcove along the center line of furnace and  
floor opening. (See Figure 13)  
MOUNTING  
PLATE  
REAR WALL  
FLOOR  
OPENING  
FUEL  
LINE  
HOLES  
SUPPLY AIR DUCT  
CUT DUCT OPENING  
1/16TH. LARGER THAN  
DUCT CONNECTOR  
Figure 14. Mounting Plate  
SCREWS  
MOUNTING  
PLATE  
UNDER DUCT OPENING  
DUCT  
CONNECTOR  
MOUNTING  
PLATE  
FLOOR  
OPENING  
FUEL  
LINE  
HOLES  
FUEL  
LINE  
HOLES  
SUPPLY AIR DUCT  
14” SUPPLY  
CONNECTION  
Platinum Series  
Figure 15. Duct Connector  
Non-Platinum Series  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
b. Cut ceiling and roof holes as follows:  
Ceiling Hole = 8-3/4" (222 mm) diameter  
Roof Hole = 9-3/8" (238 mm) diameter  
c. DO NOT ALLOW DEBRIS TO FALL INTO  
THE FURNACE. THIS COULD CAUSE  
UNSAFE OPERATION AND VOIDS THE  
FURNACE WARRANTY. Use the top cap  
that comes with the furnace packaging (or  
alternate protector) to prevent debris from  
falling into the furnace before the final roof  
jack connection is made.  
INSTALLING FINGER TABBED DUCT CON-  
NECTORS  
a. Place duct connector through the floor open-  
ing with bottom tabs extending through the  
duct opening. (See Figure 15)  
b. Secure duct connector to floor.  
c. Bendbottomtabsunderanduptightlyagainst  
the supply air duct (See Figure 16).  
NOTE: The duct connector is designed for use  
on ducts 12" in width. When using the connector  
on 12" wide ducts, there may be insufficient  
clearance to bend the tabs on two sides of the  
duct connector. In such cases the tabs may be  
attached to the sides of the duct by using sheet  
metal screws or other suitable fasteners. (See  
Figure 17).  
CUT DUCT OPENING (FINGER TABBED  
ONLY)  
a. Place duct connector through the floor open-  
ing with bottom tabs resting on top of the  
supply air duct.  
b. Centerductconnectorandpushbackagainst  
rear edge of floor opening.  
c. Mark cut-out location (tab area) and remove  
duct connector.  
If sealant, mastic, or tape is used to provide a  
better seal, it should be approved by applicable  
national or local codes.  
d. Cut out duct opening 1/4" larger than area  
marked.  
ALTERNATE ATTACHMENT METHODS  
INSTALL FURNACE MOUNTING PLATE  
a. Place mounting plate (supplied within duct  
connector) at rear of the floor opening (See  
Figure 15).  
This procedure may also be used to install a  
furnace duct connector to narrow metal  
ductwork where insufficient clearance prevents  
INSTALLING PLATINUM SERIES 14” ROUND  
DUCT CONNECTOR  
a. Place duct connector through the floor open-  
ing. (See Figure 15).  
TABS  
DUCT  
b. Secure duct connector to floor.  
1. INSERT DUCT CONNECTOR INTO  
DUCT CUT-OUT.  
INSTALLING SCREW DOWN DUCT CON-  
NECTOR  
TABS  
a. Apply a bead of caulking, mastic, or other  
approved sealant around bottom side of 1/2”  
flange and restrictor plate, when applicable.  
b. Locate the duct connector over duct and  
carefully lower screw down duct connector  
into place.  
DUCT  
2. BEND BOTTOM TABS OVER  
AND ONTO THE UNDERNEATH  
DUCT SERVICE.  
c. Once duct connector is located on duct,  
temporarily hold in place while fastening duct  
connector to the floor using flat head screws  
or nails. Be sure flanges of duct connector  
stay in contact with the duct.  
Figure 16. Installation of Duct Connector  
Duct Connector  
d. Screw plenum to duct making sure a seal is  
made between the duct and the duct connec-  
tor. Additional screws may be added if re-  
quired.  
e. Cut away duct along edge of flange allowing  
the center to drop into the duct. Remove  
section of duct with caution, as edges will be  
sharp.  
Narrow Duct  
Duct  
Figure 17.  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
bending of the duct connector tabs at the  
side(s) of the duct. (See Figure 18).  
1. Score and cut the top of the metal duct as  
indicated in Step 1 or Step 2. With Step 1  
choice,alsocutoutthemetalfromtheshaded  
area “A”.  
NOTE: Additional fasteners may be used at  
rear, sides or through door frame, as desired,  
to secure furnace to closet or alcove framing.  
INSTALL ROOF JACK  
2. Fold the duct flap “B” up, (See Step 3).  
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 duct connector is securely attached.  
6. Tape the duct flap edges with an approved  
tape for a leak-free joint.  
Apply caulking compound on underside of roof  
flashing to form a continuous strip at least 3/8"  
wide (see Figure 21) around the underside of  
the perimeter of the flashing. Connect Roof  
Jack Assembly to the furnace. Insert telescop-  
ing Roof Jack Assembly through the opening  
cut on the roof. Connect flue pipe to flue collar  
of furnace. Connect combustion air pipe to  
furnace collar with sheet metal screw (See  
Figure 22). It is recommended that the connec-  
tion of the combustion air pipe to the furnace be  
made before the flashing is secured to the roof  
to maintain alignment of roof jack and furnace  
connections.  
NOTE: For replacement furnaces, be sure the  
inner flue pipe connects over the furnace vent  
collar. DO NOT use a smaller diameter inner  
flue pipe which could slide inside the fur-  
nace vent collar and restrict the flow of  
furnace flue products.  
INSTALL 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.)  
Attach Roof Flashing: If necessary, shift roof  
flashing slightly in the roof opening so that  
assembly is in good alignment with furnace.  
Press down firmly over caulking on roof flashing  
to make the seal with roof water tight. Secure  
flashing with appropriate fasteners. As an  
d. Secure front with one (1) fastener at each  
corner (See Figure 19 or 20).  
STEP 2.  
STEP 1.  
Fold Back Flap "B"  
Fold Back Flap"B"  
Cut  
Lines  
Duct  
Cut- Out  
Area "A"  
Cut- Out  
Area"A"  
"B"  
"B"  
"B"  
"A"  
A"  
"A"  
"A"  
"B"  
Top of Duct  
Fold Back Flap"B"  
Fold Back Flap "B"  
Staple Folded Duct  
Flap (typ) to side of Duct  
Connector  
Bend Duct Connector Tabs Up  
and Over- (along length of duct)  
Duct  
Flap "B"  
Duct  
Duct  
STEP 4.  
STEP 3.  
Figure 18.  
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
added protection against leaks, coat the flash-  
ing plate and fasteners with approved roofing  
compound.  
SLIDE FURNACE  
ALL THE WAY BACK  
ONTO MTG. PLATE  
MTG. PLATE TABS  
If flashing mounted on 12 degree angle is used  
it may be necessary to adjust the angle to match  
the roof pitch; (1/12 - 4/12 maximum).  
SECURE FURNACE  
WITH 2 FASTENERS AT FRONT  
CORNER HOLES  
12. INSTALLATIONOFTRANSIT-  
MODE VENTING SYSTEM  
MANUFACTURED HOME FACTORY  
a. Furnace to be installed per furnace installa-  
tion manual.  
b. Roof Jack to be selected from Table 5 of  
these instructions.  
Figure 19. “A”, “B”, & Platinum  
Cabinet Furnaces  
c. Roof Jack (less upper Roof Jack crown),  
with weather cap to be installed as described  
under Install Roof Jack.  
SLIDE FURNACE  
ALL THE WAY BACK  
ONTO MTG. PLATE  
MTG. PLATE TABS  
d. Upper Roof Jack crown to be stored in a  
prominentlocationinsidemanufacturedhome  
until on-site installation.  
e. The four warning tags supplied must be  
installed as follows:  
SECURE FURNACE  
WITH 2 FASTENERS  
AT FRONT CORNER HOLES  
FUEL  
LINE  
HOLES  
To weather cap  
To fuel line connection point (Gas) or  
furnace burner (Oil)  
Figure 20. “A” Cabinet Furnace on 911969  
Coil Cabinet (Non-Platinum Series)  
To furnace flame observation door (Gas  
or Oil)  
To furnace wall thermostat  
Secure Roof Jack with  
appropriate fasteners  
after connecting to  
furnace  
MANUFACTURED HOME SITE  
a. Transit-mode weather cap to be removed  
and upper Roof Jack crown installed (See  
Figure 24).  
b. Place upper Roof Jack (crown) on to the flue  
pipe assembly. Be sure inside flue pipe  
attaches over inner flue pipe. Be sure outer  
Roof Jack pipe fits over outer pipe. Secure  
in place using three (3), #10, 1/2" sheet metal  
screws removed in step #a. Do not use the  
same holes which secured the rain cap in  
place.  
Roof  
Caulk under roof  
flashing to prevent  
water leakage  
Ceiling  
Optional #901943  
Ceiling Trim Ring  
or #902521  
2-piece Ceiling Ring  
Figure 21. Flat Roof  
Upper Roof  
Jack Section  
Secure lower roof  
jack section with  
no. 10 S.M. screws  
Optional  
Slant-Deck  
Flashing  
Secure flashing  
with appropriate  
fasteners  
Caulk under roof  
flashing to prevent  
water leakage  
Ceiling  
Figure 22.  
Figure 23. Pitched Roof  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Power supply circuit to the furnace must be  
installed and grounded in accordance with the  
National Electrical code (ANSI-C1/NFPA-70),  
or Canadian Electric Code Part 1 (CSA 22-1)  
and all local codes having jurisdiction.  
c. Venting system warning tags to be removed  
and discarded.  
!
WARNING:  
CONNECT POWER SUPPLY WIRES  
a. Remove the furnace control panel cover.  
b. Insert 115 volt wires through the strain relief  
on the left side of the furnace control box (see  
Figure 25).  
Failuretoproperlysecurethefluepipe  
tothefurnacemayresultinfire,explo-  
sion or asphyxiation when operating  
the furnace.  
c. Connect the “hot” wire to the BLACK pigtail  
lead, and the “neutral” wire to the WHITE  
pigtail lead. Secure all connections with  
suitable wire nuts.  
d. Connect the “ground” wire to the grounding  
screw.  
13. ELECTRICALWIRING  
Refer to the wiring diagram in these instructions  
or affixed to the inside of the control box cover  
for the wiring of your particular unit.  
e. Reinstall the control panel cover and secure  
with the original mounting screws.  
ELECTRICAL BRANCH SUPPLY CIRCUITS.  
Route all electrical wiring to the left side of the  
furnace. For installation of “A” Cabinet fur-  
naces, allow sufficient slack in the wiring if an  
optional cooling coil cabinet is added at a later  
time. Use of copper conductors is recom-  
mended.  
CONNECT THERMOSTAT WIRES  
a. Insert 24 volt wires through the plastic grom-  
met just above the control panel.  
b. Connect the thermostat wires to the furnace  
low voltage pigtails (see Figure 25).  
c. Connect low-voltage circuit to the wall ther-  
mostat.  
!
d. A hole may be made in the furnace cabinet to  
ease thermostat wiring. Make sure that the  
wiring is protected from the sharp edge of the  
added hole.  
WARNING:  
Anyattempttooperatefurnacebefore  
replacing transit-mode weather cap  
with upper roof jack section may re-  
sult in hazard of fire, explosion or as-  
phyxiation.  
NOTE: The thermostat should be installed 4 to  
5 feet above the floor on an inside wall which is  
relatively free from direct sources of heat or  
UPPER ROOF  
JACK (CROWN)  
SCREWS  
WEATHER CAP  
FLASHING  
COMPLETED  
ASSEMBLY  
OUTER PIPE  
TO FURNACE  
INNER FLUE  
PIPE  
FLUE ASSEMBLY  
Figure 24.  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
cold drafts. The nominal anticipator setting is  
0.4. (Refer to the thermostat literature for addi-  
tional information.)  
If the heat anticipator is set too low, the furnace  
may cycle frequently and not provide comfort  
to the homeowner.  
Five-conductor thermostat wire is recom-  
mended for 24 volt low-voltage circuit (2-wire is  
required for furnace only; 5-wire for heating and  
optional cooling systems).  
14. FUEL PIPING  
Sizing and installation of fuel lines must be in  
accordance with federal, state and local regu-  
lations. All piping shall be black iron pipe, or  
equivalentlysizedsteeltubing. Internallytinned  
copper tubing may be used for gas supply  
systems.  
For Platinum-ready Construction:  
a. Use a heat/cool thermostat.  
b. Run thermostat wire from the Thermostat to  
the Furnace (see Figure 39).  
c. Using thermostat wire with at least two wires  
(four wire is recommended), run thermostat  
wire from the Furnace to the intended loca-  
tionofthePlatinum-seriesunit. Leaveatleast  
six feet of extra thermostat wire at the in-  
tended location for future hook-up. Coil re-  
maining six feet of wire and attach to the  
home’s undercarriage.  
Fuel line installations other than typical installa-  
tions shown in Figures 26 and 27 must comply  
with the fuel piping provisions stated in the  
Federal Manufactured Home Standard (H.U.D.  
TITLE24,PART280)andtheNationalFuelGas  
Code (ANSI-Z223.1/NFPA-54).  
a. Optionalfuelinletlinesareavailableforallgas  
furnace models to permit the addition of a 1/  
2" F.P.T. shut-off valve above the floor.  
Once the furnace is installed check the thermo-  
stat anticipator against the nominal setting of  
0.4:  
1. Connectthemilliampmeterinserieswithone  
of the gas valve’s low voltage terminals.  
2. Energize the gas valve.  
3. Read the value of the milliamps.  
4. Adjust the heat anticipator of the thermostat  
to the value read on the milliamp meter.  
NOTE: Shut-off valve must be designed and  
listed for use with liquid petroleum (L.P. gas).  
The gas supply to your home will either be  
Natural Gas or L.P. (bottle gas). Your furnace  
is factory equipped to operate on Natural Gas.  
If your gas supply is L.P. (bottle gas), you must  
contact a qualified serviceman or gas supplier  
to convert the furnace. The necessary instruc-  
tions for the gas conversion are found on the  
lighting instruction label attached to the furnace  
in Section 16, Service Guide.  
If the heat anticipator is set too high, the furnace  
may delay in coming on.  
Thermostat Wires  
On-Off  
Switch  
Furnace  
Control Box  
Blower  
Plug  
To Combustion  
Blower or  
Flame Roll-Out  
Switch  
Power  
Entry  
On-Auto  
Switch  
(Heating  
Models Only)  
To Gas Valve  
or Burner  
Figure 25. Control Panel (All Models)  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
For natural gas operation, the furnace is de-  
signed for 7" W.C. inlet pressure. Pressure is  
reduced to 3-1/2" W.C. by the pressure regu-  
lator in the gas valve. The maximum inlet  
pressure for the valve is 13” W.C.  
T’STAT  
Wire Gauge  
Recommended T’STAT Wire  
Length (Unit to T’STAT)  
2-Wire  
(Heating)  
55  
5-Wire  
(Heating/Cooling)  
24  
22  
20  
18  
25  
45  
90  
For L.P. gas, pressure to the gas valve must  
be more than 11" W.C. but not more than 13"  
W.C. Pressure is reduced to 10" W.C. by the  
pressure regulator in the gas valve.  
140  
70  
225  
110  
Table 8. Thermostat Wire Gauge  
!
CAUTION:  
Use a tank capacity suitable for the application  
with a weatherproof, capped fill opening and a  
shieldedventtoletinairasfuelisused.Thetank  
mustbecleaninsidebeforefilling.Allwater,rust,  
sediment and other foreign matter must be  
flushed out.  
The furnace must be converted by a  
qualifiedtechnician.Improperconver-  
sion can cause unsafe operation, ex-  
plosion, fireand/orasphyxiation.  
A fuel or tank gauge is recommended for easy  
checking of the fuel level. Check the gauge  
reading with a dipstick.  
Oil Tank and Piping Installation  
The following procedures are recommended  
as good practice. However, requirements of  
local codes and ordinances, H.U.D. Manufac-  
tured Home and Safety Standards or National  
Fire Protection Association must be satisfied,  
where they apply, for an approved installation.  
Locate the storage tank conveniently near the  
home. For above ground fuel tank installations,  
the tank may rest three to four inches off the  
On-Off-Fan  
Switch  
Control  
Panel  
Floor  
Floor Cavity  
Alt. Fuel  
Line Entry  
To Gas  
Supply  
Figure 26. Typical Gas Piping  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
ground. Fuel tanks may also be buried if prop-  
erlycoatedtoresistcorrosion.Forbelowground  
fuel tank installations, the vertical dimension  
from the bottom of the fuel tank to the fuel pump  
must not exceed ten feet. Keep the tank filled,  
especially in the summer to reduce the accu-  
mulation of condensation.  
problems such as nozzle failure, odors, rum-  
bling noise, and false safety shutdown.  
7. Inserttheshortlengthofthecoppertubelevel  
with the bottom of the duplex bushing. Form  
the tube into an inverted “U” to serve as a  
vent.  
How to Eliminate Air Leaks  
Fuel Line Hook-Up: One Line System  
The one line system is highly recommended  
where vertical lift, from bottom of tank to pump,  
is not more than eight feet. A single line hookup  
has the advantage of costing less and giving  
quieter operation.  
To eliminate problems caused by air in the oil  
line, all connections in the oil supply line and all  
plugs, nuts, and fittings on the pump must be  
airtight. This includes the nut that covers the  
pressure adjustment. It is important that the  
hook-up be done carefully and with a good  
flaring tool.  
Fuel Line Hook-Up: Two Line System  
Use a two line system only if the vertical lift  
exceeds 8 feet.  
1. Install the oil feed line as outlined in steps 1-  
6 below.  
To assure continuous operation, use a wire to  
jump terminals T-T (or F-F) on the primary  
control while burner is running. If furnace is  
equipped with the Honeywell R7184 primary  
control, priming oil pump procedure is as fol-  
lows:  
2. Install the oil pump bypass plug in the bottom  
return port.  
3. Run the return line up through the furnace  
base to the return port of the pump. Run the  
other end of the line to the tank, using 3/8”  
O.D. copper tubing or 1/4” pipe with the ends  
capped, and routing the line so it stays clean.  
4. Insert the return line through the second  
opening in the duplex bushing. If the bottom  
of the tank is lower than the pump intake, the  
tube should be inserted three or four inches  
from the tank bottom. If the bottom of the tank  
is higher than the pump intake, the return line  
should extend not more than 8” inside the  
tank.  
1. While the ignition is on, press, for 1/2 second  
or less, and release the reset button. The  
lockout time will be extended to 4 minutes.  
2. If prime is not established within the 4 min-  
utes, the control will lock out. Press the reset  
button to reset the control.  
3. Repeat steps “1” and “2”, if needed, until the  
pump is fully primed.  
When oil flow is clear and free of air bubbles,  
closeair-bleedvalveandtighten. (Timetobleed  
air out will vary depending on length of oil line,  
number of bends, etc.)  
If a two pipe system is used or if oil is taken from  
the bottom of the tank, a filter is recommended.  
Fuel Oil Type  
Do not use fuel oil heavier than Grade No. 2.  
Grade No. 1 may be used where the oil supply  
is subject to low temperatures.  
Hook-Up Procedure (See Figure 27)  
1. Usea3/8O.D. coppertubingforthefuelline.  
Cap the end with tape to keep out dirt while  
the line is being routed.  
2. Install duplex bushing for two 3/8” lines in the  
top fitting of the tank.  
DO NOT USE GASOLINE, CRANKCASE OIL,  
OR ANY OIL CONTAINING GASOLINE.  
3. Insert one end of the tubing through the  
duplex bushing until it is three to five inches  
from the bottom drain. Tighten the bushing.  
4. Run the line where it will not be subject to  
damage. Also, make bends gradually and  
avoid kinks which might restrict oil flow.  
5. Open the furnace door. Connect the oil line  
to the intake port on the pump. Tighten other  
port plugs on the pump.  
!
WARNING:  
Failure to keep supply of oil clean by  
various procedures described above  
may cause failure of certain compo-  
nents such as the fuel pump gears,  
check valve, shaft seal, or burner  
nozzle which may result in a burner  
fire.  
6. Be sure oil line is airtight! Air leaks can cause  
the pump to lose prime and will create other  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
d. WHAT TO DO IF YOU SMELL GAS: Do not  
try to light any appliance. Do not touch any  
electric switch and do not use any phone in  
your building. Immediately call your gas  
supplier from a neighbor’s phone. Follow the  
gas supplier’s instructions. If you cannot  
reach your gas supplier, call the fire depart-  
ment.  
e. Use only your hand to push in the gas control  
lever. Never use tools. If the lever will not  
push in by hand, don’t try to repair it. Call a  
qualified service technician. Force or at-  
tempted repair may result in a fire or explo-  
sion.  
15. FLUE GAS SAMPLING  
It may be necessary to take flue gas sampling  
from oil and gas gun furnaces (M1S and M1B  
Series Models) in order to check the perfor-  
mance after furnace installation. A flue gas  
sample may be taken from the heat exchanger,  
which is located behind the hole of the top-front  
of blower compartment.  
1. STOP! Read the SAFETY INFORMATION.  
2. Turn off all electric power to the appliance.  
3. Remove the black plastic cap located above  
the blower and save.  
4. Through the top of the blower compartment  
hole,drillaholeforyoursamplingtubeintothe  
heat exchanger.  
5. Insert sampling tube through the drilled hole.  
6. After a complete check and adjustment of  
furnace performance, fill the drilled hole with  
a screw that is larger than the hole.  
7. Put silicon sealant (rated at least 500° F)  
around the screw.  
f. Do not use this furnace if any part has been  
under water. Immediately call a qualified  
service technician to inspect the furnace and  
to replace any part of the gas valve or control  
system which has been under water.  
LIGHTING INSTRUCTIONS FOR STAND-  
ING PILOT MODELS.  
8. Plug the outside hole with the plastic cap you  
removed in step 3.  
a. Stop! Read the safety information.  
b. Set the thermostat to the lowest setting.  
c. Turn off all electric power to the appliance.  
d. Push in the gas control lever slightly and  
move left to “OFF.” DO NOT FORCE.  
e. Wait ten (10) minutes to clear out any gas.  
If you then smell gas, STOP! Follow step “d”  
in the SAFETY INFORMATION. If you don’t  
smell gas, go to the next step.  
f. Find pilot - follow metal tube (pilot tube) from  
gas control valve. Open hinged fire obser-  
vation door. The pilot is found at the end of  
the pilot tube just left of the pilot shield.  
g. Slightly depress the gas control lever and  
move it right to the “ON” position and release;  
then move it to the “PILOT” position.  
h. Move the control lever to “SET” and hold.  
Immediately light the pilot with a match.  
Continue to hold the control lever for about  
one(1)minuteafterthepilotislit. Releasethe  
lever and it will spring back to the “PILOT”  
position. Pilot should remain lit. If it goes out,  
repeat steps “d” through “h” above. If the  
lever does not spring back when released,  
stop and immediately call your service tech-  
nician or gas supplier. If the pilot will not stay  
lit after several tries, move the gas control  
lever to “OFF” and call your service techni-  
cian or gas supplier.  
!
WARNING:  
If you do not follow these instructions  
exactly, a fire or explosion may result  
causingpersonalinjury,lossoflife,or  
property damage.  
16. LIGHTINGANDSHUTDOWN  
GENERAL-ALL MODELS  
Read the safety information on the front page of  
these installation instructions before lighting  
furnace. DO NOT ATTEMPT TO LIGHT  
FURNACE IF YOU SMELL GAS.  
SAFETY INFORMATION  
FOR YOUR SAFETY READ BEFORE LIGHT-  
ING.  
a. The first lighting of the furnace after any  
home setup must be performed by a  
qualified service technician.  
b. If this appliance has a pilot that must be lit by  
hand, follow these instructions exactly.  
c. BEFORE LIGHTING smell all around the  
furnace for gas. Be sure to smell next to the  
floor because some gas is heavier than air  
and will settle on the floor.  
i. Move the gas control lever left to “ON”.  
j. Turn on all electric power to the furnace. Set  
the thermostat to “Heat” and/or the desired  
temperature setting. Set the On-Off-Fan  
switch to “ON”.  
k. Replace the furnace door.  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SEQUENCE OF OPERATION FOR STAND-  
ING PILOT  
a On a call for heat, the thermostat contacts  
close, supplying 24 VAC to the gas valve.  
b. When the gas valve is energized it steps  
open at a reduced flow and opens fully after  
approximately 14 seconds.  
c. When the call for heat is satisfied the thermo-  
stat contacts open, the gas valve shuts off  
gas flow.  
!
WARNING:  
Close hinged fire door. If fire door is  
open or spring is broken it may allow  
productsofcombustionintotheliving  
space by the furnace blower resulting  
in possible asphyxiation.  
In the event of any flashback or explosion,  
immediately shut off the furnace and call your  
service technician.  
SEQUENCE OF OPERATION FOR STAND-  
ING PILOT W/INDUCED DRAFT BLOWERS  
MODELS  
a. On a call for heat, the thermostat contacts  
close, supplying 24 VAC to the relay.  
b. The relay contacts close and energize the  
induced draft motor.  
c. When the inducer starts, the air pressure  
switch closes at -0.20”WC differential pres-  
sure and energizes the gas valve.  
d. When the gas valve is energized it steps  
open at a reduced flow and opens fully after  
approximately 14 seconds.  
TO TURN OFF GAS TO APPLIANCE:  
a. Set the thermostat to the lowest setting.  
b. Turn off all electric power to the appliance at  
breaker or fuse box, before servicing.  
c. Remove the furnace door.  
d. Push in the gas control lever slightly and  
move to the left to “OFF.” DO NOT FORCE.  
e. Replace the furnace door.  
Gas Control Lever  
Pilot Adjustment  
Figure 28. Standing Pilot Valve  
Pilot  
Bracket  
Figure 29. Lighting Furnace  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
e. When the call for heat is satisfied the thermo-  
stat contacts open, the gas valve shuts off  
gas flow, and the induced draft blower stops.  
f. Wait ten (10) minutes to clear out any gas. If  
you smell gas, STOP! and follow step “d” in  
the SAFETY INFORMATION section. If you  
do not smell gas, go to the next step.  
GENERAL-DIRECT IGNITION MODELS  
g. Set the On-Off switch to the “ON” position.  
h. Honeywell - turn knob on gas control counter  
clockwise to “ON.” Robertshaw - push the  
gas control lever to “ON.”  
Read safety information on front page of these  
installation instructions before operating fur-  
nace.  
DO NOT ATTEMPT TO OPERATE  
i. Turn on all electric power to the appliance.  
j. Replace the furnace door.  
FURNACE IF YOU SMELL GAS.  
k. Set the thermostat to “HEAT” and the desired  
temperature setting. The furnace should light  
after approximately 75 seconds. If the appli-  
ance will not operate, follow the instructions  
“To Turn Off Gas To Appliance” and call your  
service technician or gas supplier.  
Operating instructions for  
M1M — MODELS WITH DIRECT IGNITION:  
a. STOP! Read the SAFETY INFORMATION.  
b. Set the thermostat to the lowest setting.  
c. Turn off all electric power to the appliance.  
d. This appliance is equipped with an ignition  
device which automatically lights the burner.  
Do not try to light the burner by hand.  
In the event of any flashback or explosion,  
immediately shut off the furnace and call your  
service technician.  
e. Honeywell - push in the gas control knob and  
turn clockwise to “OFF.” Robertshaw - push  
the gas control lever to “OFF.” NOTE: The  
lever cannot be placed in the “OFF” position  
unless it is pushed in slightly. DO NOT  
FORCE (See Figures 30 & 31).  
TO TURN OFF GAS APPLIANCE:  
a. Set the thermostat to the lowest setting.  
b. Turn off all electric power to the appliance  
before servicing unit.  
c. Set the ON-OFF switch to “OFF.”  
d. Honeywell - push in the gas control knob and  
turn clockwise to “OFF.” Robertshaw - push  
the gas control lever to “OFF.”  
e. Replace the furnace door.  
SEQUENCE OF OPERATION FOR M1M  
MODELS WITH DIRECT IGNITION  
Direct ignition model furnaces do not have a  
pilot. Ignition is accomplished automatically by  
a silicon carbide hot surface ignitor. A control  
module takes care of all timing functions. After  
lighting, the control module uses the ignitor as  
aflamesensor,shuttingoffgasshouldtheflame  
go out. There are no external relays or timing  
devices.  
GAS CONTROL KNOB  
Figure 30. Direct Ignition  
Gas Valve - Honeywell  
Do not try to light this furnace manually.  
The control module is not field serviceable.  
a. On a call for heat, the thermostat contacts  
close, supplying 24 VAC between terminals  
“C” and “W” of the control module, which  
starts combustion motor.  
b. When the inducer starts, the air pressure  
switch closes at -0.20”WC differential pres-  
sure and energizes the control.  
c. After a 45 second purge period, the ignitor is  
energized for a 30 second warm-up period,  
after which the gas valve opens.  
d. The trial period for ignition is approximately 6  
seconds, after which the gas valve either  
Gas Control  
Figure 31. Direct Ignition  
Gas Valve - Robertshaw  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
remains open if flame is sensed, or closes if  
flame is not sensed.  
Do not try to light this furnace manually.  
e. If flame is not sensed, the entire sequence is  
repeated four more times before “lockout”  
occurs. To reset, wait 30 seconds and then  
interrupt the 24 VAC power by turning the  
room thermostat below room temperature,  
then returning it to the original set point.  
f. If flame is not established on the fifth trial for  
ignition (initial try + 4 re-tries), the control de-  
energizes the gas valve, flashes “4” on the  
Status LED, and lockouts out heat operation  
for 1 hour.  
g. If a flame is present, the control energizes the  
main blower on heat speed 30 seconds after  
the gas valve opens.  
h. When call for heat is satisfied the thermostat  
contacts open, the gas valve shuts off gas  
flow and the combustion blower remains on  
for a 30 second post-purge period.  
a. Open all valves in the oil line.  
b. Be sure the fire door is closed.  
c. Set the On-Off switch to “ON”.  
d. Set the thermostat to the desired setting.  
SEQUENCE OF OPERATION FOR  
OIL GUN MODELS  
Oil Furnace - Honeywell R7184 Control  
1. When a call for heat is initiated, there is a 2-  
6 second delay while the control performs a  
safe start check.  
2. The ignition and motor are turned on and a  
flame should be established within the 15-  
second lockout time. NOTE: Burner will  
prepurge for 15 seconds if equipped with  
R7184B Control.  
3. If flame is not sensed within the 15-second  
lockout time, the control shuts down on  
safety lockout and must be manually reset.  
If control locks over three times in a row, the  
control enters restricted lockout. To reset,  
hold down the reset button for 30 seconds  
until the LED flashes twice.  
4. Once flame is established, the ignition re-  
mains on 10 seconds to ensure flame stabil-  
ity. It then turns off.  
i. The main blower is de-energized after a 120  
second blower off delay.  
!
WARNING:  
FOR YOUR SAFETY; WHAT TO DO IF  
YOU SMELL GAS:  
Do not try to light any appliance.  
Donottouchanyelectricalswitch;do  
not use any phone in your building.  
Immediately call your gas supplier  
from a neighbor’s phone. Follow the  
gas supplier’s instructions.  
5. The circulating air blower will energize after  
the temperature fan switch closes.  
6. The furnace runs until the call for heat is  
satisfied.  
7. The circulating air blower will de-energize  
when the temperature fan switch opens.  
If you cannot reach your gas sup-  
plier,callthefiredepartment.Should  
overheating occur or the gas supply  
fail to shut off, disconnect the power  
at the main circuit breaker and then  
see “To Turn Off Gas To Appliance.”  
!
WARNING:  
If furnace still does not light, turn the  
furnaceoff(describedabove)andcall  
your technician. In the event of any  
flashback or explosion, immediately  
shut off furnace and call your service  
technician.  
OPERATING INSTRUCTIONS FOR  
OIL AND GAS GUN FURNACE:  
Oil Gun Model  
M1 oil gun furnaces may be converted to gas  
gun in the field by using the proper conversion  
kit listed in the RPL.  
Gas Gun Models  
M1 gas gun furnaces may be converted to oil  
gun in the field by using the proper conversion  
kit listed in the RPL.  
IfyourfurnacemodelnumberbeginswithM1S*,  
the furnace is equipped with an ignition device  
which automatically lights the burner.  
IfyourfurnacemodelnumberbeginswithM1B*,  
the furnace does not have a pilot. Ignition is  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
c. If the burner has not lit, the ignition sequence  
is repeated a maximum of two more times. If  
flame is not sensed after three attempts, the  
control enters “Lockout” and no further at-  
tempts to light the burner will occur. If  
“Lockout” occurs, contact a qualified service  
technician for assistance.  
accomplished automatically by a silicon car-  
bide hot surface ignitor. A control module takes  
care of all lighting and timing functions. There  
are no external relays or timing devices.  
Do not try to light this furnace manually.  
The control module is not field serviceable.  
1. Before operation, smell all around the fur-  
nace for gas. Be sure to smell next to the  
floor because some gas is heavier than air  
and will settle on the floor. If you smell gas,  
STOP! and follow the safety instructions  
below. If you don’t smell gas, go to the next  
step.  
2. Set the thermostat to the lowest setting.  
3. Turn off all electric power to the appliance.  
4. This appliance is equipped with an ignition  
devicewhichautomaticallylightstheburner.  
Do not try to light the burner by hand.  
5. Honeywell - push in the gas control knob  
and turn clockwise to “OFF.” Robertshaw  
- push the gas control lever to “OFF.”  
NOTE: The lever cannot be placed in the  
“OFF” position unless it is pushed in slightly.  
DO NOT FORCE (See Figures 30 & 31).  
6. Wait ten minutes to clear out any gas. If you  
then smell gas, STOP! and follow the safety  
information on the preceding page. If you  
don’t smell gas, go to the next step.  
7. Set the On-Off switch to the “ON” position.  
8. Honeywell-turnknobongascontrolcounter  
clockwise to “ON.” Robertshaw - push the  
gas control lever to “ON.”  
9. Turn on the electric power to the appliance.  
10. Set the thermostat to “Heat” and/or the  
desired temperature setting. The furnace  
should light in approximately 45 seconds.  
If the appliance will not operate, follow the  
instructions “To Turn Off Gas To Appli-  
ance” and call your service technician or  
gas supplier.  
!
DANGER:  
Before placing the furnace in service  
it must be checked to make sure it is  
equipped for the type of gas being  
used. The burner flame must also be  
observed and adjusted if necessary.  
Failure to observe this caution may  
result in unsafe operation, explosion  
and/or fire, or asphyxiation. See the  
following sections “Gas Supply” and  
“CombustionAir.”  
d. When call for heat is satisfied, the thermostat  
contacts open and the gas valve shuts off  
gas flow.  
TO TURN OFF GAS/OIL APPLIANCE:  
a. Set the thermostat to the lowest setting.  
b. Turn off all electric power to the appliance  
before servicing unit.  
c. Set the On-Off Switch to “OFF.”  
d. Honeywell - turn gas control knob clockwise  
to “OFF” Robertshaw - Push the gas control  
lever to “OFF.”  
e. For oil, shut off all valves.  
f. Replace the furnace door.  
THE FURNACE CONTROLS AND FUNC-  
TIONS  
1. On-Off Switch - This switch turns electrical  
power to the furnace on and off. The switch  
must be set in the “On” position for the  
furnace to operate. For M1G* models, in  
warm weather there is a possibility of the  
blower coming on periodically or operating  
continuously due to a heat buildup within the  
furnace by a combination of warm weather  
and heat from the pilot. This is normal  
operation as long as there is power to the  
furnace and the On-Off switch is at the “ON”  
position. If blower operation is not desired,  
the On-Off switch may be set in the “OFF”  
position to cut the electrical power to the  
furnace.  
In the event of any flashback or explosion,  
immediately shut off the furnace and call  
your service technician.  
SEQUENCE OF OPERATION FOR  
GAS GUN MODELS  
a. On a call for heat, the furnace control begins  
an ignition sequence which lasts approxi-  
mately 45 seconds.  
b. After this sequence, the control module tests  
to see if flame is sensed. If it has, the furnace  
continues to heat until the thermostat is  
satisfied.  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2. Limit Control - This furnace is protected by  
two high temperature safety limit switches.  
The auxiliary (upper) limit switch and the high  
temperature (lower) limit switch are auto-  
matic reset types. If either limit trips, the  
burner will shut off. If either limit switch trips  
off again soon after resetting, set the furnace  
On-Off switch to the “OFF” position and call  
your authorized serviceman.  
tion. Therefore the following items should be  
checked and readjusted if necessary.  
Atmospheric Gas with Standing Pilot and Direct  
Ignition Furnaces, Including Gas Gun.  
a. Gas Pressure  
The gas pressure can be checked with a  
manometer at the pressure tap located on  
the side of the gas valve. The gas valve  
pressure regulator can be adjusted by re-  
moving the regulator selector stack and  
turning the slotted insert located directly  
under the selector stack. The regulator  
selector stack must be secured in place  
before each pressure reading is taken.  
Natural gas manifold pressure should be 3.5"  
W.C. and L.P. gas manifold pressure should  
be 10" W.C. Replace the gas pressure tap  
plug on the gas valve.  
3. Gas Valve - The gas valves for the gas  
furnaces are a 100% shut-off type and will fail  
safe if for some reason the gas is turned off.  
The valve is a “step-open” type for M1G*-  
modelsandslow-openforM1M*-andM1B*-  
models which means it opens to a “low-fire”  
position, and after a few seconds, “steps-  
open” to “high-fire.”  
4. Roll Out Switch - (M1G* - 056 & 070) The  
furnace is protected by a manual reset safety  
switch located on the bottom left hand side of  
the combustion pipe.  
b. Pilot Flame (Standing Pilot Only)  
The pilot flame can be adjusted by turning the  
pilot adjustment screw, located on top of the  
gas valve (See Figure 29). The pilot flame  
height should be between 3/4” and 1.” The  
flame tip should be visible just above the pilot  
bracket when viewed through the observa-  
tion door. The same pilot orifice is used with  
both natural and L.P. gas.  
5. Oil Burner Primary Control - The primary  
control for oil gun furnaces starts the burner,  
monitors a safe operating cycle, and shuts  
the burner off at the end of a heating cycle.  
The control uses a light sensing transducer  
to determine if fuel ignition has been suc-  
cessfullyattained. Ifignitionisnotattainedby  
theendofthesafetyignitiontimingperiod,the  
control shuts the burner off and enters “lock-  
out.”  
COMBUSTION AIR  
In order for the flame to burn efficiently, it must  
receive adequate combustion air. The amount  
of combustion air required will vary depending  
on altitude, actual B.T.U. content of the fuel  
being used, gas pressure, conversion to an-  
other gas and other factors. The burner flame  
should be observed and any necessary adjust-  
ments made before the furnace is placed into  
service. See Table 9 for Factory Air settings.  
6. a. Summer Cooling - (H Series): Your fur-  
nace is equipped to operate the circulating  
fan only. Turn the Fan On-Auto switch to the  
“ON” position during warm weather. The  
blower will now operate to circulate air in your  
home through the duct system.  
Gas Gun  
Combustion air adjustment is made to the main  
burner by loosening the lock nut on the plastic  
air shutter, located on the side of the plastic  
burner air inlet box. Move the threaded rod to  
a smaller number (counterclockwise) for less  
b. Summer Cooling - (A, B, C, & D Series):  
Your furnace is A/C ready, equipped with A/  
Crelayandtransformer. Theunitisequipped  
to use a 4-wire thermostat. When using a 5-  
wire thermostat, RC and RH should be  
jumped (see instructions included with ther-  
mostat).  
Factory Combustion  
Air Settings  
17. SERVICE GUIDE  
BURNER ADJUSTMENTS  
M1B* - 066 = 3.5  
M1B* - 086 = 4.0  
M1S* - 066 = 3.0  
M1S* - 086 = 5.5  
Burner settings and adjustments are made at  
the factory. However, these settings may  
change during shipping, handling, and installa-  
Table 9.  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
air, to a larger number (clockwise) for more air.  
Tighten the lock nut after completing the adjust-  
ment. For best results, use instruments to  
measure between 8-9% CO2 after the combus-  
tion air has been adjusted.  
!
CAUTION:  
Combustion air adjustment must be  
made only by a qualified technician.  
Improper air adjustment may cause  
unsafe operation, explosion and/or  
fire asphyxiation.  
If the input to the furnace is too great  
because of excessive gas pressure,  
wrongsizenozzleororifice,highalti-  
tude, etc., the burner flame will be  
sooty and can produce carbon mon-  
oxide, which could result in unsafe  
operation, explosion and/or fire or  
asphyxiation.  
Oil Gun Only  
It is recommended that the CO2 and Smoke  
levels should be measured for maximum per-  
formance. CO2 readings should be 10-11% for  
66,000 BTUH furnaces and 12-13% for 86,000  
BTUH furnaces. The Smoke should be N0. 0 on  
the Bacharach Scale, and 0 to 0.02 negative  
draft over fire.  
Electrode Setting (Oil Gun Only)  
Poor ignition of the oil spray may result if the  
electrodes are not adjusted as shown in Figure  
32. Donotpermitanyelectrodestobegrounded  
to any surface.  
GAS CONVERSION  
Switching the Honeywell R7184 Ignition  
Control between Interrupted and Intermit-  
tent Duty (Oil Gun Only)  
This gas fired heating appliance was shipped  
from the factory for use with natural gas. How-  
ever, the appliance can be converted for use  
with LP gas. Use the following procedure for  
gas conversion of the burner.  
The Honeywell oil primary control can be  
switched between interrupted and intermittent  
ignition control. To switch from interrupted duty  
(Factory set) to intermittent duty, remove the  
igniterwirefromthebluecontrolwire. Attachthe  
burner motor and igniter wire to the orange  
control wire. Cap and reseal the orange control  
wire. Cap and isolate the blue control wire.  
ATMOSPHERIC AND DIRECT IGNITION  
FURNACES  
a. Follow the instructions to “Turn Off Gas to the  
Appliance.”  
b. Disconnect the gas pipe union and the elec-  
trical wires connected to the gas valve.  
c. Remove the pilot tube and thermocouple  
from the gas valve (M1G*).  
5/32” GAP  
ELECTRODE  
Honeywell  
Valve  
OR  
5/16” ABOVE CL  
NOZZLE  
0-1/16”  
1 3/8”  
OTHER SIDE  
PRESSURE  
OF CAP  
REGULATOR  
CAP  
M11678  
Figure 33. Convertible Pressure  
Regulator Cap  
Figure 32. Oil Gun electrode Position  
26  
Download from Www.Somanuals.com. All Manuals Search And Download.  
NOTE: The pilot flame is adjustable by turning  
the adjustment screw located on the gas valve  
with a small screwdriver. (See Figure 29)  
Robertshaw  
Valve  
TROUBLESHOOTING - STANDING PILOT  
MODELS  
Main Burner Does Not Come On  
a. Check the electrical supply to the furnace.  
b. Be sure the furnace On-Off switch is in the  
“ON” position.  
c. Check for proper thermostat operation.  
d. Check for broken or open thermostat wires.  
e. Check to make sure the insulation located on  
the inside of the front panel is glued securely  
around the fan switch and the limit switch.  
f. Shut off the electrical supply to the furnace  
and remove the electrical box cover.  
g. Check for a defective transformer or blown  
fuse.  
Figure 34. Convertible Pressure  
Regulator  
h. Check electrical circuit for proper grounding,  
polarity, and make sure the electrical con-  
nections are tight.  
i. Check to see if limit switches may have failed  
to close.  
j. Replace the electrical box cover and restore  
electrical power to the furnace. Turn the On-  
Off switch to “ON” and raise the thermostat  
setting above room temperature.  
k. Check for 24 volts at the gas valve.  
l. Replace the gas valve if the pilot is estab-  
lished and it does not open when powered  
with 24 volts.  
d. To remove the gas valve assembly, remove  
screw(s) from gas valve bracket. Gas valve  
and spud may be removed. Orifice is located  
at the end of the spud (M1G*,M1M*),or re-  
move three (3) bolts from U-shaped manifold  
plate and orifice assembly (M1B*).  
e. Replace the main orifice with the L.P. gas  
orificesuppliedintheenvelopelocatedbythe  
gas valve. Check to insure the orifice size  
matches the nameplate.  
f. It is not necessary to convert the pilot orifice.  
g. For Honeywell gas valves with the regulator  
converter (Figure 33), check for the letters  
NAT or LP on the pressure regulator cap.  
Unscrew the cap, invert it, replace, and  
tighten until snug.  
h. For the Robertshaw gas valve with the regu-  
lator converter (Figure 34), remove the black  
cover and unscrew the converter located on  
top of the gas valve. Invert the converter.  
(For “LP” the red ring will be located at the  
bottom and the “LP” stamping on the con-  
verter will appear right side up.) Then screw  
converter back into the regulator, hand tight  
plus 1/8 turn, and replace the black cover  
onto the converter top to protect the threads.  
i. Reassemble the burner assembly into the  
furnace.  
Gas Valve Powered (24 volts)– No Main  
Flame  
a. The manual shut-off valve must be on.  
b. The pilot flame must be established.  
c. The gas valve control lever must be in the  
“ON” position.  
d. Check gas pressure coming to the gas  
valve.  
e. Replacethegasvalveifthemainburnerdoes  
not come on under the above conditions.  
Pilot Will Not Light or Goes Out  
a. Check the incoming gas pressure.  
b. Check for the proper pilot orifice. See the  
nameplate SPECIFICATION.  
c. Check for proper pilot flame adjustment. See  
“BURNER ADJUSTMENTS.”  
d. Check the thermocouple millivoltage.  
• Millivoltage should read between 18 and 30  
mv.  
j. Reconnectthegaspipingandelectricalwires  
to the gas valve.  
k. Open the manual shut-off valve and follow  
the FURNACE START-UP procedure as  
outlined previously in this manual to put the  
furnace into operation.  
• If the closed millivolt reading is not between  
18 and 30 mv., the gas valve electromagnet  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Control Module Status Indicators - M1M Series  
Control Status  
The Red LED labeled “STATUS” is provided to indicate system faults.  
Steady ON:  
Steady OFF:  
Rapid flash:  
One flash:  
Control OK  
No power  
False flame or internal control fault  
Limit switch is open  
Two flashes:  
Three flashes:  
Four flashes:  
Five flashes:  
Pressure switch is open  
Pressure switch is stuck closed  
Lockout due to failed ignition  
L1 neutral reversed or L1 voltage  
not present on L1  
Flame Status  
A Yellow LED labeled “Flame” is provided to indicate flame status. When  
flame is sensed, the flame LED is lit. If flame sense is weak, yellow LED  
will flash.  
Control Module Status Indicator - M1B  
a. One flash-the control is in lock-out because the inducer centrifu  
gal switch is or was stuck closed.  
b. Two flashes-the control is in lockout because the signal was not  
received by the control that the inducer centrifugal switch had  
closed within the time.  
c. Three flashes-the control is in lockout because a failed ignition  
attempt, a gas valve error, or a false flame sensed during the warm  
up period. If false flame has been sensed, the control will return to  
normaloperation,andrepeatignitionsequencewhenthefalseflame  
is not present.  
d. Fourflashes-thecontrolisinlockoutduetoafailurewithinthecontrol  
board.  
Control Module Status Indicator - M1S* Series  
The indicator light on the oil primary control provides lockout, recycle,  
and cad cell indications as follows:  
1. Flashing 1/2 second on, 1/2 second off - system is locked out or  
in restricted mode.  
2. Flashing 2 seconds on, 2 seconds off - control is in recycle mode.  
3. Indicator light is on - cad cell is sensing flame.  
4. Indicator light is off - cad cell is not sensing flame.  
may be defective. Replace the gas valve if  
c. Check the flue for any blockages or loose  
necessary.  
connections.  
e. Be sure the pilot shield is in place.  
f. Check for gas leaks in the pilot line or the pilot  
assembly.  
g. Check the flue assembly to make sure all  
connections are tight.  
d. Checkthecombustionairpassagesforblock-  
age.  
High Gas Bills  
a. Be sure the proper orifices are being used.  
b. Be sure the return air system is clear and free  
of blockage.  
h. See the FURNACE START-UP procedure  
for lighting details.  
c. Be sure the furnace filter is clean.  
d. Be sure the home is insulated, that windows  
and doors fit tightly, and that there are no  
leaks in the heating duct system.  
e. Check the room thermostat to be sure the  
setting is not higher than necessary. Low  
Main Flame Is Not Burning Properly  
a. Check the manifold gas pressure.  
b. Check for the correct main burner orifice.  
- See the nameplate SPECIFICATION.  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Set on RX1 scale.  
humidity requires higher temperatures for  
the same level of comfort. Check for proper  
humidity level in the home.  
• Normal reading should be 40 - 75 ohms.  
• If above or below this rating at room tem-  
perature change ignitor.  
TROUBLESHOOTING -  
DIRECT IGNITION FURNACES INCLUDING  
GAS GUN  
c. Check for continuity from ignitor receptacle  
to burner.  
Main Flame Ignites—  
Burner Locks Out  
a. Ignition control is not properly grounded.  
Burner Motor Does Not Run—  
Thermostat Calls For Heat  
a. Check the electrical supply to the furnace.  
b. Be sure the furnace On-Off switch is in the  
“ON” position.  
b. Defective ignition control.  
c. Improper polarity of 120 volt power supply.  
d. Ignitor has hairline crack.  
c. Defective thermostat circuit - white and red  
thermostat low voltage leads (M1M*, M1B*  
models). If the burner motor or combustion  
fan runs, check:  
e. Improper gas pressure or burner air adjust-  
mentisnotallowingflametocontactignitortip  
for flame rectification.  
f. Misaligned ignitor does not allow flame to  
contact ignitor tip for flame rectification.  
• Thermostat connections  
• Thermostat  
Burner Short Cycling —-  
Thermostat Calls for Heat, Limit Switches  
Closed  
a. Check for polarity.  
b. Check ground.  
d. No voltage to control module - determine if 24  
volts (or 120 volts) is available to the control  
module. If voltage is not available check for:  
• Blown fuse, defective transformer, circuit  
breaker, no electrical supply.  
c. Check flue.  
• Limit switch open.  
d. Check combustion air.  
e. Check gas pressure.  
f. Check orifice.  
g. Check the position of ignitor, a normal read-  
ing should be 40-75 ohms.  
• Loose connections.  
Combustion Blower Does Run - No Flame  
a. Defective centrifugal switch (M1B* Model).  
• Check the operation of centrifugal switch  
by removing end bell of the burner motor.  
• Clean contacts of motor.  
24 Volts Supplied To Gas Valve During  
Ignition —  
No Main Gas Flow  
• If the contacts are closed, replace the  
motor.  
a. Gas valve may be defective. Replace if  
b. Defective pressure switch (M1M* and M1G*  
077, 090 Models) - check air tube and elec-  
trical connections.  
c. Burner in purge mode - allow 75 seconds for  
flame establishing period.  
d. Check for proper electrical connections at  
purge timer, control box, or gas valve.  
e. Check for gas supply - gas line valve on,  
control lever on.  
necessary.  
b. Gas piping may be plugged. Check for  
adequate gas supply to gas valve at union.  
Burner Operates—  
Insufficient Heat  
a. Check thermostat for proper setting and  
location. Thermostat should not be located  
where it will be affected by another heat  
source.  
b. Check for clean filter and proper air flow.  
c. Check burner for proper gas firing rate.  
d. Be sure unit is not undersized for its thermal  
load.  
Control Module Is Powered—  
Ignitor Does Not Heat Up  
a. Disconnect ignitor leads at AMP receptacle  
and check for 120 volts at the plug during  
ignition sequence.  
e. Check thermostat anticipator. The nominal  
anticipator setting is 0.4.  
b. Replace ignition control if 120 volts is not  
available at AMP plug during ignition se-  
quence.  
Burner Flame Without Motor Running  
a. Gas valve stuck open, check gas valve for  
proper operation (replace if necessary) and  
inspect heat exchanger.  
b. Check for 115 volts to the combustion blower  
motor; replace if necessary.  
120 Volts Is Available At AMP Plug—  
Ignitor Does Not Heat Up  
a. Disconnect power to the furnace.  
b. Disconnect AMP plug to the ignitor, and  
check ignitor resistance with an ohm meter.  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
c. If no power to combustion blower then check  
wiring and control module; replace if neces-  
sary.  
Led Flashes CadCellResistanceinOhms  
1
2
3
4
0 - 400  
400 - 800  
800 - 1,600  
>1600  
Circulation Air Blower Will Not Operate  
Even Though The Burner Does Operate  
a. Check thermostat “G” wiring.  
b. Check wiring to motor.  
Table 10. Cad Cell Resistance when  
sensing flame  
c. Check for a defective motor.  
TROUBLESHOOTING - OIL GUN  
turns on, but control locks out again,  
check cad cell if cad cell is Okay,  
replace primary control.  
Honeywell R7184 oil gun control only.  
Burner does not start with a call for heat.  
1. Check the electrical supply to the furnace.  
2. Be sure the furnace door switch is in the on  
position.  
3 Check for line voltage at the oil primary  
control. The voltage should be 115 VAC.  
4. Check indicator light with burner off, no call  
for heat (no flame).  
3. If indicator light continues to flash at  
1/2 second on, 1/2 second off, verify  
that control is not in restricted mode. If  
restricted mode, reset it. If not in re-  
stricted mode, replace R7184.  
4. Ifindicatorlightstaysoffwhiletheflame  
is on, check cad cell sighting for view  
of flame.  
5. If burner locks out, check cad cell  
resistance. (See Table 10)  
6. If burner keeps running, system is  
Okay.  
a. If indicator light is on, the cad cell is seeing  
stray light or the cad cell or controller is  
defective.  
b. If indicator light is off, go to step 5.  
c. If flashing, refer below (a. Reset primary  
control).  
7. If indicator light is off, check cad cell  
assembly after disconnecting line volt-  
age power.  
5. Jumper T to T terminals on primary control.  
a. If burner starts, check thermostat or limit  
wiring connections.  
b. Burner will not start, and indicator light is  
flashing at 2 second on, 2 second off.  
Hold the reset button down for 1-2 second.  
If indicator light continues to flash, wait for 60  
- 70 seconds. If it still continues to flash,  
replace the primary control.  
b. If burner does not start, turn off power.  
Check all wiring connections.  
c. If burner does not start, replace R7184  
control.  
c. To check cad cell resistance.  
Press and release the button during the run  
mode. The light will flash to indicate the cad  
cell resistance. For proper burner operation,  
it is important that the cad cell resistance  
reaover 1600 Ohms. For cad cell resistance,  
see Table 10.  
Burner starts, then locks out on safety with  
indicator light flashing at ½ second on, ½  
second off.  
a. Reset primary control.  
To reset the control from lockout, the button  
needs only to be pressed and released. If it  
is in restricted mode, the button should be  
held in for 30 seconds (until the light flashes  
twice, or until the light stops flashing on  
earlier models).  
Note: Restricted Mode: If the control  
locks out three times in a row without a  
complete heat cycle between attempts,  
the lockout becomes restricted mode.  
1. If indicator light stops flashing and  
ignition remains off, primary control  
could be defective. If line voltage is  
present at the ignitor terminals, but  
thereisnoignition,theignitorisprobably  
defective and needs to be replaced.  
2. If indicator light stops flashing, burner  
Figure 35. Periodic Cleaning  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
a. Remove the air circulator and clean all dust  
and lint from the unit with a stiff bristle brush.  
b. Inspect the combustion chamber blower  
compartment, flue collar and Roof Jack.  
c. Check the gas valve (if applicable) and fuel  
line connections for leaks.  
Check for  
Ice Here  
d. Make any adjustments necessary for good  
operation.  
!
WARNING:  
Useoffurnaceorairconditioningcom-  
ponents that are not included in the  
certificationofthisappliancemaycre-  
ate a hazard, invalidate the certifica-  
tion, and in many states, make instal-  
lations illegal. Listed NORDYNE air  
conditioning components are speci-  
fied on the furnace label.  
Figure 36. Roof Jack  
!
WARNING:  
Do not obstruct any return air open-  
ings, including the grille on the fur-  
nace. To do so may cause the furnace  
toactivatethehighlimitandshutdown,  
or it may cause asphyxiation.  
ADDITIONAL OIL  
FURNACE MAINTENANCE  
Inadditiontothepreceding,thefollowingshould  
be performed by a qualified service contractor  
at least once each season for oil-fired furnaces:  
a. Replace the oil nozzle with the type nozzle  
specified for your furnace.  
b. Clean, adjust and replace if necessary the  
spark electrodes.  
c. Reset the nozzle/drawer assembly to fac-  
tory specifications.  
d. Clean the inside of the furnace heat ex-  
changer and replace the combustion liner if  
necessary.  
18.MAINTENANCE  
By Homeowner  
1. Return Air - On some closet installations the  
return air opening to the furnace may be on  
the floor, on the door, on the side wall of the  
closet, or some combination of these. The  
upper grille on the front of the furnace admits  
return air to the blower. Return air must be  
provided back to the circulating blower in  
order to provide air distribution.  
e. Clean or replace the oil filter element at the oil  
tank.  
f. Adjust the burner for top efficiency and check  
to make sure all fittings are leak-tight.  
2. Filters - At least twice each season (more  
often in dusty areas) remove and clean the  
air filters with a vacuum or with warm water  
and soap. Reinstall when dry. Also clean  
dust and lint around furnace and in the fur-  
nace vestibule. (Figure 35.)  
19.OPTIONALACCESSORIES  
3. Seasonal Service Information - During ex-  
tremely cold weather, ice may form on the  
furnace roof jack. Small amounts of ice form-  
ing on the roof jack will present no problems  
to proper furnace operation. Excessive ice  
formation could restrict the combustion air  
supply to the burner, causing inefficient  
burneroperation. Ifexcessiveicehasformed  
on the air inlet or exhaust portions of the roof  
jack, it must be carefully removed (Figure  
36).  
Necessary when the Furnace is Used with  
Some Central Air Conditioners  
If an air conditioner is installed that does not use  
the furnace blower for air distribution and that  
operates independently of the furnace, the  
thermostat system must have an interlock to  
prevent the furnace and air conditioner from  
operating at the same time. This interlock sys-  
temusuallycontainseitheraHeat-Coolswitch  
which must be turned to the “Heat” or “Cool”  
position to activate either heating or cooling  
operation, or a positive “OFF” switch on the  
cooling thermostat.  
By Serviceman  
All furnaces need periodic service at the begin-  
ning of each heating season. Call your service-  
man to:  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Figure 37. Coil Cavity Damper (Non-Platinum Series Only)  
Figure 38. Damper without Coil Cavity (Non-Platinum Series Only)  
M1* A/C Ready  
Furnace  
M1* A/C Ready  
Furnace  
Thermostat  
Thermostat  
Red  
Red  
Red  
Red  
Rc  
Rc  
RH  
RH  
White  
White  
White  
White  
W
W
Green  
Yellow  
Green  
Grey  
Green  
Yellow  
Green  
Grey  
G
Y
G
Y
**  
**  
Standard Wiring  
Route Thermostat wire to intended Platinum  
Series AC/HP location. Coil and secure extra  
six feet of wire to home's undercarriage.  
Platinum Ready Wiring  
Figure 39.Thermostat Wiring A/C Ready Models  
32  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Blower Speed Selection Chart for M1*B Models and  
for use with Blower Kit No. 903773 1/4 Hp 3 Speed  
Heating Cooling Speed/ Evap Coil  
Furnace Input  
Speed  
Setting  
H
2-1/2  
Ton  
2 Ton  
3 Ton  
086, 090  
L
M
H
066, 070, 077  
056  
M
L
L
L
M
M
H
H
Blower Speed Selection Chart for M1*C Models and  
for use with Blower Kit No. 903413 1/2 Hp 4 Speed  
Cooling Speed/ Evap Coil  
Heating  
Speed  
2-1/2 Ton  
& 3 Ton  
3-1/2  
Ton  
2 Ton  
4 Ton  
Furnace Input  
Setting  
077, 086, 090  
ML  
L
L
L
ML  
ML  
MH  
MH  
H
H
056, 066, 070  
Blower Speed Selection Chart for M1*D Models and  
for use with Blower Kit No. 903414 and 903890  
3/4 Hp 4 Speed  
Heating  
Speed  
Cooling Speed/ Evap Coil  
Furnace Input  
2-1/2 Ton 3-1/2 Ton  
& 3 Ton & 4 Ton  
2 Ton  
5 Ton  
Setting  
077, 086, 090  
056, 066, 070  
ML  
L
L
L
ML  
ML  
MH  
MH  
H
H
Table 11. A/C Blower Selection  
The furnace must also be equipped with an  
automatic damper (See Figures 37 or 38,  
NORDYNE p/n 901996 for furnaces without coil  
cavity, or p/n 901083 with coil cavity) to prevent  
cold air from being discharged up around the  
heat exchanger. Cold air may cause conden-  
sationinsidetheheatexchangerwhichcanlead  
to rust and early failure.  
Listed and ARI Certified, all models are pro-  
tected by the NORDYNE Air Conditioner Lim-  
ited Warranty.  
Platinum series units are self contained pack-  
age units with compressor and cooling coils.  
They are designed as a drop in system when  
used with the AC ready M1.  
OPTIONAL ADD-ON AIR CONDITIONING  
Ask your dealer or contractor about NORDYNE  
add-on central air conditioning systems. There  
is a split-system or package air conditioner  
designed for your total comfort needs. Whether  
split system or single package, an energy-  
saving NORDYNE unit is available that has  
been designed specifically for manufactured  
housing applications and can best handle your  
home comfort needs.  
Singlepackageunitincludescoolingcoils, com-  
pressor, and vertical discharge fan. This type  
of unit connects with the existing home air duct  
system (an optional close-off damper is re-  
quired with the furnace).  
Splitsystemunitwithverticaldischargeforquiet  
operation connects with NORDYNE cooling  
coil furnace (optional coil cavity required with  
“A” model furnaces).  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
B L U E  
3 A F U S E  
W H I T E  
R E D  
R E D  
G R A Y  
B L A C K  
B L A C K  
B L A C K  
B L A C K  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
B L A C K  
B L A C K  
B L A C K  
W H I T E  
3 A F U S E  
R E D  
R E D  
G R A Y  
B L A C K  
B L A C K  
B L A C K  
B L A C K  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
W H I T E  
O R A N G E ( M E D . L O )  
B L U E ( M E D . H I )  
B L A C K ( H I G H )  
R E D ( L O W )  
G R E E N  
W H I T E  
3 A F U S E  
R E D  
G R A Y  
W H I T E  
R E D ( L O W )  
B L U E ( M E D . H I )  
B L A C K ( H I G H )  
O R A N G E  
B L A C K  
B L A C K  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
W H I T E  
O R A N G E ( M E D . L O )  
B L U E ( M E D . H I )  
B L A C K ( H I G H )  
R E D ( L O W )  
G R E E N  
W H I T E  
G R E E N  
R E D  
3 A F U S E  
R E D  
G R A Y  
W H I T E  
R E D ( L O W )  
B L U E ( M E D . H I )  
B L A C K ( H I G H )  
G R A Y  
B L A C K  
B L A C K  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
W H I T E  
. L O )  
O R A N G E ( M E D  
B L U E ( M E D . H I )  
C K ( B H L I G A H )  
R E D ( L O )  
W H I T E  
R E D ( L O )  
B L U E ( M E D . H I )  
B L A C K  
B L A C K  
C K ( B H L I G A H )  
W H I T E  
G R E E N  
R E D  
G R A Y  
S e e T a b l e  
C W G R  
C O M  
Y E L L O W  
Y E L L O W  
B L A C K  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
W H I T E  
W H I T E  
W H I T E  
B U S H I N G  
B L U E  
V I O E T  
B L A C K  
B L A C K  
G R E E N  
W H I T E  
G R E E N  
R E D  
3 A F U S E  
R E D  
G R A Y  
R E D  
G R A Y  
B L A C K  
B L A C K  
W H I T E  
O R A N G E ( M E D L O )  
B L U E ( M E D . H I )  
B L A C K ( H I G H )  
R E D ( L O )  
( S E E N O T E 3 )  
R E D  
B L A C K  
W H I T E  
R E D ( L O )  
B L U E ( M E D H I )  
B L A C K ( H I )  
B L A C K  
39  
Download from Www.Somanuals.com. All Manuals Search And Download.  
21. EQUIVALENT ORIFICE SIZES AT HIGH ALTITUDES  
(Includes 4% Input Reduction for Each 1,000 Feet)  
FURNACE  
MODEL  
ORIFICE SIZE AND  
OUTPUT CAPACITY  
ALTITUDE - FEET  
SEA LEVEL 2000 3000 4000 5000 6000 7000 8000 9000 10000  
ORIFICE SIZE - NAT. GAS  
M1M/G 056 ORIFICE SIZE - LP  
OUTPUT- MBTUH  
ORIFICE SIZE - NAT. GAS  
M1M/G 070 ORIFICE SIZE - LP  
OUTPUT- MBTUH  
29  
45  
45.4  
24  
42  
56.7  
21  
40  
61.7  
21  
40  
59.9  
17  
36  
71.7  
17  
36  
69.7  
26  
43  
52.6  
18  
29  
46  
30  
47  
30  
47  
30  
47  
30  
48  
31  
48  
31  
49  
31  
49  
32  
50  
30.2  
30  
47  
37.7  
29  
45  
41.0  
29  
45  
39.8  
26  
43  
47.7  
26  
43  
46.3  
30  
48  
35.0  
27  
41.8 40.1 38.5 37.0 35.5 34.1 32.7 31.4  
25  
42  
52.3 50.2 48.2 46.2 44.4 42.6 40.9 39.3  
23  
41  
56.9 54.6 52.4 50.3 48.3 46.4 44.5 42.7  
23  
41  
55.2 53.0 50.9 48.9 46.9 45.0 43.2 41.5  
18  
37  
66.1 63.5 60.9 58.5 56.1 53.9 51.7 49.7  
18  
37  
64.2 61.7 59.2 56.8 54.6 52.4 50.3 48.3  
27  
44  
48.5 46.6 44.7 42.9 41.2 39.6 38.0 36.5  
19  
38  
26  
43  
27  
43  
27  
43  
28  
44  
28  
44  
29  
45  
29  
46  
ORIFICE SIZE - NAT. GAS  
ORIFICE SIZE - LP  
OUTPUT- MBTUH  
ORIFICE SIZE - NAT. GAS  
ORIFICE SIZE - LP  
OUTPUT- MBTUH  
ORIFICE SIZE - NAT. GAS  
ORIFICE SIZE - LP  
OUTPUT- MBTUH  
ORIFICE SIZE - NAT. GAS  
ORIFICE SIZE - LP  
OUTPUT- MBTUH  
ORIFICE SIZE - NAT. GAS  
ORIFICE SIZE - LP  
OUTPUT- MBTUH  
ORIFICE SIZE - NAT. GAS  
ORIFICE SIZE - LP  
23  
42  
24  
42  
25  
42  
26  
43  
27  
43  
28  
44  
28  
44  
M1M 077  
M1G 077  
M1M 090  
M1G 090  
M1B 066  
M1B 086  
23  
42  
24  
42  
25  
42  
26  
43  
27  
43  
28  
44  
28  
44  
19  
38  
19  
38  
20  
39  
21  
40  
22  
41  
23  
41  
24  
42  
19  
38  
19  
38  
20  
39  
21  
40  
22  
41  
23  
41  
24  
42  
28  
44  
28  
44  
28  
45  
29  
45  
29  
46  
30  
47  
30  
47  
19  
39  
20  
39  
21  
40  
22  
41  
23  
42  
24  
42  
26  
43  
37  
43  
OUTPUT- MBTUH  
68.2  
62.9 60.3 57.9 55.6 53.4 51.2 49.2 47.2  
45.3  
Table 12. High Altitude  
Reference Sources: ANSI Z233.1 & NFPA 54, National Fuel Gas Code.  
For Canadian high altitude (2,000 - 4,500'), reduce gas manifold pressure to 3.0”  
W.C. for  
natural gas and 9” W.C. for LP gas.  
NOTE: Do not attempt to change the size of an orifice by drilling it out. To do so will  
void the manufacturer’s warranty  
INSTALLER: Please leave  
these installation instructions  
with the homeowner.  
¢708074/¤  
708074E  
708074E(Replaces708074D)  
Specifications and illustrations subject to change  
without notice and without incurring obligations.  
PrintedinU.S.A.(04/06)  
O’Fallon,MO  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Multi Tech Systems Network Card MVP400 User Manual
Muratec All in One Printer MK3190 User Manual
NEC Computer Monitor DPSB70 User Manual
NETGEAR Network Router DG834 User Manual
Nikon Film Camera D3000 User Manual
NordicTrack Home Gym NTB09920 User Manual
Omega Home Security System PSW 31 User Manual
Optoma Technology Projector EH503 User Manual
Oregon Scientific Clock BAR888RA User Manual
Panasonic All in One Printer KX PW601DL User Manual