Evcon DGAM056BDD, DGAT056BDD, DGAT070BDD, DGAT075BDD, DGAT090BDD Installation Instructions Manual
...
INSTALLATION INSTRUCTIONS
SEALED COMBUSTION
DOWNFL OW GAS FURNACES
Forced Draft with Direct Ignition (Hot Surface)
FURNACE SET---UP CHECK LIST
IMPORTANT: ONLY INDIVIDUALS HAVING PROVEN EXPERIENCE WITH THIS TYPE OF EQUIPMENT
SHOULD ATTEMPT TO PERFORM SET --UP.
- HAS ROOF JACK CROWN BEEN CORRECTLY
INSTALLED?
- HASFURNACEGASVALVEANDBURNERORIFICE BEEN CORRECTLY CONVERTED FOR L .P.
GAS WHERE APPLICABLE?
- HASFURNACEGASVALVEBEENDE---RATED
FOR ALTITUDES ABOVE 2000 FEET WHERE
APPLICABLE?
- IS GAS LINE OUTLET PRESSURE PROPERLY
IMPORTANT: PROPER FURNACE SET--UP AND ADJUSTMENT IS THE RESPONSIBILITY OF THE
RETAILER/HOMEOWNER AND IS NOT COVERED UNDER WARRANTY.
DLAS MODELS
(No Coil Cabinet)
SET FOR FUEL TYPE? (NATURALGASIS3.5”
W.C.; L. P . IS 10” W.C.)
- IS PRIMARY AIR PROPERLY ADJUSTED PER
INSTALLATION INSTRUCTIONS?
- IS CROSS ---OVER DUCT INSTALLED PER
HOME BUILDER AND EVCON INSTALLATION
INSTRUCTIONS?
- HAS FURNACE BEEN OPERATED THROUGH A
COMPLETE HEATING CYCLE?
DGAT & DGAM MODELS
(With Built-- In Coil Cabinet)
For Installation In:
1. Manufactured (Mobile) Homes
2. Recreational Vehicles & Park
Models
3. Modular Homes & Buildings
TABLE OF CONTENTS
GENERAL SPECIFICATIONS AND INSTRUCTIONS 4.......................
FURNACE SPECIFICATIONS 5...........................................
INSTALLATION STANDARDS 6...........................................
Comply with Local Codes 6......................................................
HIGH ALTITUDE INSTALLATIONS 6...............................................
MINIMUM FURNACE CLEARANCES 6............................................
RETURN AIR REQUIREMENTS 7.................................................
CLOSET INSTALLATIONS 7......................................................
Furnace to Closet Door Clearance — Greater than 6 Inches 7........................
Additional Requirements 7.......................................................
Floor or Ceiling Return Air System 7..............................................
SPECIAL CLOSET INSTALLATIONS 8.............................................
Furnace to Closet Door Clearance — Greater than 1 Inch and Less than 6 Inches 8....
Furnace to Closet Door Clearance — Less than 1 Inch 8............................
AIR DISTRIBUTION SYSTEMS 9..................................................
ROOF JACKS 10.........................................................
Locating and Cutting Roof Jack Opening 10........................................
Installing Roof Jack in Roof 10....................................................
CEILING RINGS 12..............................................................
DUCT CONNECTORS 12.........................................................
TEMPLATE & CUTOUT DIMENSIONS 12...........................................
DLAS SERIES FURNACES 13.............................................
Installation Procedure for DLAS Furnace 13.........................................
DGAT & DGAM SERIES FURNACES 14....................................
Installation Procedure for DGAT & DGAM Furnaces 14...............................
CONNECTING ROOF JACK TO FURNACE 15...............................
VENT SYSTEM INSTALLATION INSTRUCTIONS 16.........................
EXISTING FURNACE REPLACEMENT 16...........................................
NEW HOME INSTALLATION 16....................................................
INSTALLATION IN SNOW REGIONS 16.............................................
ELECTRICAL WIRING 17.................................................
CONNECT ELECTRICAL POWER AND CONTROLS 17...............................
WALL THERMOSTAT 17..........................................................
THERMOSTAT WIRING FOR DGAT AND DGAM SERIES 18..................
THERMOSTAT WIRING FOR DLAS (HEAT ONLY) SERIES 19.................
WIRING DIAGRAMS 20...................................................
Wiring Diagram for DGAT Series 20................................................
Wiring Diagram for DGAM Series 21...............................................
GAS PIPING 22..........................................................
INSTALLATION AND CHECKING OF GAS LINE 22...................................
Observing Burner Operation 22...................................................
Combustion Air 22...............................................................
2
If Furance Fails to Operate Properly 24.............................................
FINAL PROCEDURE 24...................................................
Install Furnace Doors 24..........................................................
Finish and Trim 24...............................................................
Furnace and Air Conditioner Installations 24........................................
MANUFACTURED HOUSING DERATION CHART 25.........................
PROPANE 25....................................................................
NATURAL GAS 25...............................................................
REPAIR PARTS 26........................................................
3
LIST OF FIGURES
Figure 1 — Furnace Dimensions 4................................................
TABLE 1 — Furnace Specifications 5.............................................
TABLE 2 — Electrical Specifications 5.............................................
TABLE 3 — Minimum Clearances 6...............................................
Figure 2 — Alcove Installation 6..................................................
Figure 3 — Closet to Door Clearance — 6” or greater 7.............................
Figure 4 — Furnace to Closet Door Clearance — 1” to 6” 8..........................
Figure 5 — Furnace to Closet Door Clearance — Less than 1” 8.....................
Figure 6 — Air Distribution Systems 9.............................................
Figure 7 — Location of Roof Jack Opening 10.......................................
TABLE 4 — DLAS Roof Jacks 11..................................................
TABLE 5 — DGAT & DGAM Roof Jacks 11..........................................
Figure 8 — DLAS Models 11......................................................
Figure 9 — DGAT & DGAM Models 11.............................................
Figure 10 — Ceiling Rings 12.....................................................
TABLE 6 — Duct Connectors 12...................................................
Figure 11 — Duct Connector Dimensions 12........................................
Figure 12 — Template 12.........................................................
Figure 13 — Sub---base / Duct Connector 13........................................
Figure 14 — Duct Connector 14...................................................
Figure15—ConnectingRoofJacktoFurnace 15...................................
Figure 16 — Electrical Power & Controls 17.........................................
Figure 17 — Thermostat Wiring 18.................................................
Figure 17a — Thermostat W iring 19................................................
Figure 18 — DGAT Series Wiring Diagram 20.......................................
Figure 19 — DGAM Series Wiring Diagram 21.......................................
Figure 20 — Natural Gas Flame Appearance 23.....................................
Figure 21 — Propane Gas Flame Appearance 23....................................
Figure 22 — Anti---Backflow Damper 24............................................
4
GENERAL SPECIFICATIONS AND INSTRUCTIONS
DGAT & DGAM SeriesDLAS Series
19--- 1/2”
9--- 3/4”
10--- 5/8”
60 1/2”
( o n S u b --- B a s e )
1--- 7/8”
15--- 7/8”
2”
15--- 7/8”
24”
23”
76”
19--- 1/2”
9--- 3/4”
10--- 5/8”
24”
23”
Figure 1 -- DLAS, DGAT, and DGAM Series Furnace Dimensions
IMPROPER INSTALLATION, ADJUSTMENT, SERVICE
OR MAINTENANCE CAN CAUSE INJURY OR PROPERTY DAMAGE.
PLEASE REFER TO ALL THE INSTRUCTIONS OF THIS
MANUALFORPROPERINSTALLATIONPROCEDURES. IMPROPER INSTALLATION WILL VOID THE
WARRANTY.
THEFURNACESHALLBEINSTALLEDSOTHEELECTRICAL COMPONENTS ARE PROTECTED FROM
WATER.
DO NOT TEST THE FUEL SYSTEM AT MORE THAN 14
INCHES WATER COLUMN AFTER FURNACE HAS
BEEN CONNECTED TO THE FUEL LINE. SUCH TESTING MAY VOID THE WARRANTY. ANY TEST RUN
ABOVE 14 INCHES WATER COLUMN MAY DAMAGE
WARNING
THE FURNACE CONTROL VALVE WHICH COULD
CAUSE AN EXPLOSION, FIRE, OR ASPHYXIATION.
These instructions are intended for the use of qualified individuals specially trained and experienced in installation of
this type of equipment and related system components.
Installation and service personnel are required by some
states to be licensed.
Persons not qualified shall not install this equipment or
interpret these instructions
The words “Shall” or “Must” indicate a requirement which is
essential to satisfactory and safe product performance.
The w ords “Should” or “May” indicate a recommendation
or advice which is not essential and not required but which
may be useful or helpful.
5
IMPORTANT NOTICE
.
NOTE
FURNACE SPECIFICATIONS
TABLE 1 — Furnace Specifications
DGAM — Automatic ignition — with Built -- in Coil Cabinet — 4 Ton -- A/C Ready
Model No. Factory Equipped for use w ith: Input/BTUH Output/BTUH
DGAM056BDD NATURAL GAS 56,000 46,000
DGAM075BDD NATURAL GAS 75,000 61,000
DGAT — Automatic Ignition — with Built-- in Coil Cabinet — 3 Ton -- A/C Ready
Model No. Factory Equipped for use w ith: Input/BTUH Output/BTUH
DGAT056BDD NATURAL GAS 56,000 46,000
DGAT070BDD NATURAL GAS 70,000 57,000
DGAT075BDD NATURAL GAS 75,000 61,000
DGAT090BDD NATURAL GAS 90,000 72,000
DLAS — Automatic Ignition — Heating Only — No Coil Cab inet
Model No. Factory Equipped for use w ith: Input/BTUH Output/BTUH
DLAS056BDD PROPANE 56,000 47,000
DLAS075BDD PROPANE 75,000 62,000
TABLE 2 — Electrical Specifications
Electrical Power Supply — 120 Volts — 60 Hz — 1 Phase
BreakerorFuse— 15 Amp
Thermostat Circuit — 24 Volt — 60 Hz — 40 VA
Nominal Anticipator Setting — .50
Gas Valve Inlet —
1
/2”NFPT
6
INSTALLATION STANDARDS
—
A
Comply with Local Codes
The installer shall familiarize himself with and comply with
all local codes and regulations which govern the installation
of this appliance. Local codes and regulations shall take
precedent over these regulations where applicable. In lieu
of local codes, the appliance shall be installed in accordance with:
In the U.S.A.:
the National Electrical Code, in accordance with recommendations made by the National Board of Fire Underwriters, in accordance with the the American National Standard Institute National Fuel Gas Code (Ansi
Z223.1/NFPA---54).
The installation must conform with:
local building codes,
Federal Manufactured Home Construction & Safety
Standard (H.U.D. Title 24, Part 3280),
or in the absence of local codes with:
American National Standard Mobile Homes A225.1 for
installation in mobile homes, and American National
S t a n d a r d ( A N S I --- C 1 / N F PA --- 7 0 ) f o r a l l e l e c t r i c a l w i r i n g ,
and American National Standard (A119.2/
NFPA---501C) for installation in recreational vehicles.
In Canada:
MINIMUM FURNACE CLEARANCES
Access for servicing is an important factor in the location of
any furnace. A minimum of 24 inches should be provided in
front of the furnace for access to the heating elements and
controls. This access may be provided by a closet door or
by locating the furnace 24 inches from a facing wall or partition.
These furnaces are design certified for the following minimum clearances from combustible material in alcove or
closet installation:
TABLE 3 — Minimum Clearances
CLOSET ALCOVE
BACK 0” 0”
SIDES 0” 0”
FRONT 6” 24”
TOP 2” 2”
ROOF JACK 0” 0”
DUCT 0” 0”
ALCOVE
Manufactured (Mobile) Homes:
Unit installation shall comply with current CSA standard CAN/CSA---Z240.4. 1 --- Installation Requirement
for Gas Burning Appliances in Mobile Homes.
Unit electrical wiring and grounding shall comply with
current standard CSA C22.1 --- Canadian Electrical
Code Part 1.
Recreational Vehicles:
Unit installation shall comply with current CSA standard CAN/CGA --- Z240.4.2 --- Installation Requirements
for Propane Appliances and Equipment in Recreational Vehicles.
Unit electrical wiring and grounding shall comply with
current CSA standard C22.2 No.148/CAN/CSA --Z240.6.2 --- Electrical Requirements for recreational vehicles.
HIGH ALTITUDE INSTALLATION
For elevation above 2,000 feet, derate furnace orifice
2% for each 1,000 feet of elevation above sea level. Derating is accomplished by reducing the orifice size.
See Derating Chart for orifice size and output adjustment.
Figure 2
23--- 1/2”
20”
Minimum
lcove Installation
7
RETURN AIR REQUIREMENTS
CLOSET INSTALLATIONS
Return Air Grille Part No.
7900--- 286P/A — Almond
7900--- 287P/A — White
Furnace to Closet Door Clearance —
Greater than 6 Inches
The closet door MUST have a minimum of 250
Square Inches of free area in the upper half of the
door .
If the opening for return air is locatedin the sidewall and below the top of the furnace casing:
a. total side return must equal or exceed
350 sq. in. free area
b. 6” min. clearance must be provided on
thesidewherethereturnislocated
c. 6” min. clearance must be
maintained in front of the furnace.
CLOSET
FURNACE
Return Air Closet Door Part No.
7900--- 8881 — Almond
7900--- 7771/C — White
Figure 3 — Closet to Door Clearance — 6” or greater
Additional Requirements
Additional requirements for floor and ceiling return system
for closet installed sealed combustion heating appliance
are given in the next paragraph.
Floor or Ceiling Return Air System
Floor or ceiling return air system for closet installed direct
vent forced air heating appliance.
Listed in the next paragraph are the conditions to be met by
Mobile Home Manufacturers to have U.L. acceptance of
in--- floor or ceiling return air systems of closet installed direct vent forced air heating appliances for Mobile Homes to
be sold in the United States.
A. The return---air opening into the closet, regardless of
location, is to be sized not less than specified on the
appliance’s rating plate.
B. If the return---air opening is located in the floor of the
closet (versus the vertical front or side wall), the opening is to be provided with means to prevent its inadvertent closure by a flat object placed over the opening.
C. The cross---sectional area of the return duct system
(when located in the floor or ceiling of the mobile home)
leading into the closet is to be not less than that of the
opening specified on the appliance’s rating plate.
D. The total free area of openings in the floor or ceiling reg-
isters serving t he return ---air duct system is to be not
less than 150% of the size of the opening specified on
6” or greater —
Closet to Door
Clearance
DOOR
the appliance’s rating plate. At least one such register
is to be located where likelihood of its being covered by
carpeting, boxes, and other objects is minimized.
E. Materials located in the return duct system have a flame
spread classification of 200 or less.
F. N o n --- c o m b u s t i b l e p a n s h a v i n g o n e --- i n c h u p t u r n e d
flanges are located beneath openings in the floor return duct system.
G. Wiring materials located in the return duct system con -
form to Article 300 --- 22 (b&c) of the National Electric
Code (ANSI C1 / NFPA---70).
H. Gas piping is not run in or through the return duct sys-
tem.
I. The negative pressure in the closet as determined by
test with the air --- circulating fan operating at high heating speed and the closet door closed is to be not more
negative than minus 0.05---inch water column.
J. For floor return systems, the mobile home manufacturer
or installer shall affix a prominent marking on or near
the appliance where it is easily read when the closet
door is open. The marking shall read:
WARNING
HAZARD OF ASPHYXIATION
DO NOT COVER OR RESTRICT FLOOR OPENING
or equivalent.
8
SPECIAL CLOSET INSTALLATIONS
Furnace to Closet Door Clearance — Greater than 1 Inch and Less than 6 Inches
Clearance — Greater than 1 Inch and
Less than 6 Inches
A. The closet door MUST have a minimum
of 250 Square Inches of free area in the
upper half of the door and a minimum of
50 Square Inches of free area in the lower area of the door.
The lower closet door grille may be
omitted if an undercut of 2 1/2 Inches is
provided in the door.
B. A fully louvered closet door MUST have
a minimum of 250 Square Inches of free
areaintheupperhalfofthedoor
.
As an option to the lower grill,
an undercut of 2 1/2” will provide
50 Sq. In. of free area.
Figure 4 — Furnace to Closet Door Clearance—1” to 6”
Furnace to Closet Door Clearance — Less than 1 Inch
Clearance — Less than 1”
The closet door MUST have three return air
grilles. The total free area of the two upper grilles
must be a minimum of 250 Square Inches. The
total free area of the lower grille MUST be a
minimum of 50 Sq. In.
Figure 5 — Furnace to Closet Door Clearance—Less than 1”
NOTE: Each grille MUST BE ALIGNED directly
opposite the corresponding return air grille of
the furnace door.
9
AIR DISTRIBUTION SYSTEMS
—
A
For proper air distribution, the supply duct system shall be
designed so that the static pressure does not exceed the
listed static pressure rating on the furnace rating plate.
Three typical distribution systems are illustrated in
Figure 6.
Location, size and number of registers should be selected
on the basis of best air distribution and floor plan of the
home.
TheAirTemperatureRiseistobeadjustedtoobtainatemperature rise within the range(s) specified on the furnace
rating plate.
A
Single trunk duct
Dual trunk duct with crossover connector
Dual trunk duct
Crossover
* B
1
Crossover Duct must be centered directly under furnace.
S
2
Use 12” Diameter Round or equivalent insulated Flex--- duct only.
S
3
Terminate Flex---duct (opposite furnace) in the center of the trunk duct.
S
4
Flex--- duct material must be pulled tight — No Loops or unnecessary dips
S
— Air Flow may be impeded.
B*
4
Figure 6
C
Transition Duct with Branches
Trans it io n duc t
Branches
1
2
3
ir Distribution Systems
10
ROOF JACKS
CAUTION
Only use the appropriate roof jack.
See TABLE 4 & TABLE 5 for correct application.
Do not exceed the maximum height as determined from
TABLE 4 & TABLE 5. Installer should allow an addition-
1
al 1--
/2” travel before the flue pipe assembly is fully extended against the built--in stop. This provides an additional safeguard against the flue assembly being pulled
from the roof jack during transportation or other stress
conditions.
Improper installation may damage the equipment, can
create a hazard, and will void the warranty.
Carefully follow all instructions and warnings to avoid
Fire,Explosion,OrAsphyxiation.
Locating and Cutting Roof Jack Opening
To facilitate the proper installation of the roof jack, it is very
important that the roof jack opening in the ceiling and roof
be on the same verticalcenter lineas the furnace flue collar.
SeeFigure7.
The dimensions shown in Figure 7 may be used if the furnace is flush with the walls or adjusted to allow for any spacing away from either wall.
Mark Center
9--- 3/4”
12--- 1/4”
These dimensions may be
used if furnace fits snug
against wall.
TEMPLATE FRONT
Figure 7—Location of Roof JackOpening
Installing Roof Jack in Roof
(See Figure 8 & Figure 9 for Dimensional requirements.)
Insert roof jack into opening in the roof.
The roof jack should be secured to the furnace before
roof flange (flashing) is secured to the roof. This will in-
sureabetteralignmentofthefluepipeandfurnacefluecollar. Caulk completely around the underside of the roof jack
flashing to provide a rain tight seal, before securing roof
jack flashing to roof. After roof jack flashing has been
secured to the roof, caulk carefully all a round swivel joint
with sealant supplied by furnace manufacturer.
Mark this location on ceiling and scribe a circle with a 5” radius (10” diameter) around this mark. Cut opening for roof
jack through ceiling and roof. (If furnace was installed
during construction, cover furnace and flue opening to
prevent debris from entering flue and combustion air
when hole is cut for roof jack.)
11
TABLE 4 — DLAS Roof Jacks
Thesedimensionsar
e
(SeeFigure8.)
Thesedimensions
roo
f.SeeFigure
9
—DGA
Roof Jack
Model
Number
Adjustable Height
4000--- 7121/C 75” to 86”
4000--- 7141/C ** 83” to 104”
4000--- 7151/C ** 90” to 116”
4000--- 7171/C 127” to 157”
4000--- 8161/C *+ 85” to 101”
4000--- 8181/C *+ 99” to 129”
* These jacks have removable crowns.
Note: It is recommended that the 7900--- 6171 (17”) Interior
extension be used with these models. If used refer to TABLE 5
for sizing of roof jack.
** Available with 3 ---1/2, 12 Pitch Fixed Flashing.
Models 4000--- 6141 and 4000--- 6151
+ Available with 3 ---1/2, 12 Pitch Fixed Flashing.
Models 4000--- 9161 and 4000--- 9181
19 1/2”
Installation Dimensions
¡
These dimensions are
from the floor to the
top side of the roof.
ROOF FLANGE IS ADJUSTABLE UP TO 23˚ ( 5 --- 1 2 P I T C H )
NOTE:
FLUE
GASE
S
COMBUSTION
AIR
CAULK CAREFULLY ALL AROUND
SWIVEL JOINT WITH SEALANT
SUPPLIED BY FURNACE
MANUFACTURER.
TABLE 5 — DGAT & DGAM Roof Jacks
Roof Jack
Model
Number
Adjustable Height
4000--- 7101/C 86” to 95”
4000--- 7121/C 91” to 102”
4000--- 7141/C ** 99” to 120”
4000--- 7151/C ** 106” to 132”
4000--- 7171/C 143” to 173”
4000--- 8161/C *+ 101” to 117”
4000--- 8181/C *+ 115” to 145”
* These jacks have removable crowns.
** Available with 3 ---1/2, 12 Pitch Fixed Flashing.
Models 4000--- 6141 and 4000--- 6151
+ Available with 3 ---1/2, 12 Pitch Fixed Flashing.
Models 4000--- 9161 and 4000--- 9181
Installation Dimensions
¡
These dimensions
are from the floor to
the top side ofthe
FLUE
GASE
S
COMBUSTION
AIR
19 1/2”
.
CAULK
UNDER
FLASHING
The Bead or End of Upper Portion of Roof Jack need Not extend below the ceiling.
IMPORTANT
SEAL ROOF JACK FLASHING TO THE
ROOF JACK AND ROOF.
THIS IS THE INSTALLER’S RESPONSIBILITY.
CAULK
UNDER
FLASHING
ROOF
¡¡
76”
60--- 1/2”
(INCLUDES
SUB ---BASE)
WARM AIR DUCT DUCT CONNECTOR
Figure 8 — DLAS Models
FLOOR
12
Figure 9
WARM AIR DUCTDUCT CONNECTOR
T&DGAMModels
CEILING RINGS
The ceiling ring is to meet fire stop requirements.
Accessory Ceiling Ring (P/N 7660 --- 2841) may be
used, (see Figure 10) or the mobile home manufacturer or the installer may use other approved methods to
stop fire.
If required, three (3) sections of Accessory Ring may be
used as shown in Figure 10B to provide closer clearance around roof jack.
AB
DUCT CONNECTORS
The duct connector is designed for use on ducts down to
12” in width. When using the connector on smaller width
ducts, there will n ot be sufficient 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. Holes for sheet metal screws are provided in three (3)
tabs on each side of the duct connector. If more than 3 tabs
need to be used to provide a more secure and air tight connection, the remaining tabs can also be fastened t o the
duct with screws after drilling the required screw holes.
Figure 10 — Ceiling Rings
If tape is used to provide a better air seal, it should be a type
approved by the applicable national or local codes.
TABLE 6 — Duct Connectors
Sales Package Part Number Depth
7681---6621 7681--- 602 2” Duct Connector — For Ducts 1 -- -1/8” below top of floor surface
7681---6631 7681--- 603 3” Duct Connector — For Ducts 2 -- -1/8” below top of floor surface
7681---6651 7681--- 605 5” Duct Connector — For Ducts 4 -- -1/8” below top of floor surface
7681---6661 7681--- 606 6” Duct Connector — For Ducts 5 -- -1/8” below top of floor surface
7681---6671 7681--- 607 7” Duct Connector — For Ducts 6 -- -1/8” below top of floor surface
7681---6681 7681--- 608 8” Duct Connector — For Ducts 7 -- -1/8” below top of floor surface
7681---6691 7681--- 609 9” Duct Connector — For Ducts 8 -- -1/8” below top of floor surface
7681---6611 7681--- 611 11” Duct Connector — For Ducts 10 --- 1/8” below top of floor surface
7681---6711 7681--- 612 12” Duct Connector — For Ducts 11 --- 1/8” below top of floor surface
TEMPLATE & CUTOUT DIMENSIONS
1--- 13/16
1--- 15/16”
15--- 7/8”
9--- 3/4”
14”
Duct Cutout
Dimensions
11--- 9/16”
13--- 9/16”
12”
NOTE:
Duct Connector may be used
positioned in any of four (4))
positions to fit duct.
Figure 11 — Duct Connector Dimensions
13
23”
1”
15--- 7/8”
Duct
Locating
Hole
Flue Center
Floor Cut--- out Line
Casing Front
Door Front
Figure 12 — T emplate
9--- 7/8”
12--- 1/4”
DLAS SERIES FURNACES
Installation Procedure for DLAS Furnace
The following steps are listed for installation of furnace and
need not be performed in the exact order as listed.
Follow this procedure to avoid serious misalignment of furnace duct connector opening and supply duct.
A. This Furnace requires a SUB --BASE (Included)
For convenience, a template is provided on the furnace
shipping carton. This may be cut out and used to accurately locate furnace, floor and vent openings. See
Figure 12.
Locate template on floor to provide proper clearances
to the walls and the front. Cut 2” diameter hole or small
square hole as indicated on template.
Locate template so that furnace opening outline is centered over under ---floor supply duct as accurately as
possible. This is important because of the limited adjustment from side to side, and from front to rear of the
duct connector.
Locate under---floor duct through hole and center“floor
cut---out opening” on template over duct.
Accurately cut “floor cut---out opening” from template,
mark floor opening, remove template and cut floor on
outsideedgeofmarkedline.
Position sub---base over hole.
Duct connectors will fit openings of sub --- base in any one of
four (4) positions. Place proper duct connector in the opening in the best position, (duct connector may be shifted in
either direction for best location).
Mark duct opening with a scribe or marking pen, then remove duct connector. Cut hole in duct to correct size ac-
cording to dimensions shown in Figure 11. Cut duct accurately to prevent air leakage.
Reinstall duct connector with tabs inside of hole in the duct
and bend tabs up firmly against underneath side of duct.
Secure duct connector with four (4) sheet metal screws using holes provided in the connector , and the sub --- base.
SeeFigure13.
Secure sub ---base to floor with 2 or more screws or nails.
B. Install Furnace
Check to make sure roof jack is not extending too far
down into furnace location. Slide furnace into location
and align over floor opening.
Pre---cut openings and knock ---outs are provided in
furnace base to install a front fuel line and/or front refrigerant lines. If rear entrance lines are to be used,
they must be installed before the duct connector is
installed and secured in place.
For air conditioning lines, remove the knock---out.
C. Securing Furnace
Make any minor adjustments in the furnace location
necessary to insure that the opening in the furnace bottom is centered over the opening in the duct. Secure
furnace to sub---base, as required, through holes at
front and rear of furnace. Holes for screws are located
in bottom flange front corners and rear flanges.
Secure furnace to wall at top by using metal strap provided. (See Figure 13.)
Manufacturers may add straps equivalent to provided
straps, if required, for securing furnace to structural
member.
Secure Sub --- base
to floor firmly with 2
or more screws Or
nails.
Use screw holes in sub---base
to fasten duct connector .
TAB S TAB S
DUCT DUCT
1.. Insert Duct Plenum Connector Into Duct Cut--- out.
Secure duct connector
to sub--- base with 4
screws.
Bend tabs of duct
connector under duct
opening to secure to the
supply duct.
For imp roved air
seal, duct
connector flanges
may be sealed to
the sub--- base with
aluminum duct
tape.
Secure sub ---base
to floor with 2 nails
or screws.
2.. Bend Bottom Tabs Over And Onto
The Underneath Duct Service.
Figure 13 — Sub --base / Duct Connector
14
DGAT & DGAM SERIES FURNACES
Installation Procedure for DGAT & DGAM
Furnaces
The following steps are listed for installation of furnace and
need not be performed in the exact order as listed:
Follow this procedure to avoid serious misalignment of furnace duct connector opening and supply duct.
A. This Furnace requires NO sub -- base
For convenience, a template is provided on the furnace
shipping carton. This may be cut out and used to accurately locate furnace, floor and vent openings. See
Figure 12.
Locate template on floor to provide proper clearances
to the walls and the front. Cut 2” diameter hole or small
square hole as indicated on template.
Locate template so that furnace opening outline is centered over under ---floor supply duct as accurately as
possible. This is important because of the limited adjustment from side to side, and from front to rear of the
duct connector.
Locate under---floor duct through hole and center“floor
cut---out opening” on template over duct.
Accurately cut “floor cut---out opening” from template,
mark floor opening, remove template and cut floor on
outsideedgeofmarkedline.
C. Securing Furnace
Make any minor adjustments in the furnace location
necessary to insure that the opening in the furnace bottom is centered over the opening in the duct. Secure
furnace to floor, as required, through holes at front and
rear of furnace. Holes for screws are located in bottom
flange front corners and rear flanges.
Secure furnace to wall at top by using metal strap provided. (See Figure 14.)
Manufacturers may add straps equivalent to provided
straps, if required, for securing furnace to structural
member.
Secure furnace to du ct
connector base with 4
screws.
Duct connectors will fit opening in any one of four (4) positions. Place proper duct connector in the opening in the
best position, (duct connector may be shifted in either direction for best location).
Mark duct opening with a scribe or marking pen, then remove duct connector. Cut hole in duct to correct size according to dimensions shown in Figure 11. Cut duct accurately to prevent a ir leakage.
Reinstall duct connector with tabs inside of hole in the duct
and bend tabs up firmly against underneath side of duct.
Secure duct connector to floor with four (4) sheet metal
screws using holes provided in the connector. See
Figure 14.
B. Install Furnace
Remove panel from air conditioning compartment.
Check to make sure roof jack is not extending too far
down into furnace location. Slide furnace into location
and align over floor opening.
Pre---cut openings and knock ---outs are provided in
furnace base to install a front fuel line and/or front refrigerant lines. If rear entrance lines are to be used,
they must be installed before the duct connector is
installed and secured in place.
For air conditioning lines, remove the knock---out.
SUPPLY DUCT
OPENING
Furn ace
Base
Use screw holes in furnace
base to fasten to duct connector (relative to position of
duct connector) .
TAB S TAB S
DUCT DUCT
1. Insert Duct Plenum
Connector Into Duct
C u t --- o u t .
Figure 14 — Duct Connector
Bend tabs of
duct connector
under duct
opening to secure to the
supply duct.
Fuel Line
Opening
Refrigerant
Line Opening
2. Bend Bottom Tabs Over
And Onto The Underneath
Duct Service.
15
CONNECTING ROOF JACK TO FURNACE
CAUTION
Theinnerfluepipemustbepresent.
It is mandatory that the combustion air pipe and flue
pipe assembly be fully engaged. The combustion air
pipe MUST be securely fastened to the furnace with
sheet metal screws in the holes provided.
1
Use
/2” blunt or sharp end sheet metal screws to fasten
roof jack combustion air pipe to furnace combustion air
collar. Screw holes are provided in the pipe and collar.
Excessively long screws may extend to flue pipe and
puncture it. Screws are not to exceed 1
NOTE
1
/2”inlength.
It is mandatory that the combustion air and flue tube
assemblybefullyengagedatbacksidesandfront,and
combustion air tube securely fastened to the furnace
with sheet metal screws (2) in the screw holes provided.
COMBUSTION
AIR TUBE
SECURE
STRAP
TO WALL
FLUE PIPE
FURNACE
FLUE OUTLET
K SCR EW
HOLES (2)
Combustion air tube and flue pipe are part of the same assembly. Only the combustion air tube need be fastened to
the furnace.
1. Check to be certain that the flue pipe and combustion
air tube are present.
2. Pull the telescoping flue tube and combustion air tube
assembly down from the roof jack. Slide the flue tube/
combustion air tube assembly down firmly over the fur-
collar
1
/2inch
that
nace flue outlet and combustion air collar. Insure
the back, side and front of combustion air tube
is fully engaged
. Fasten the combustion air tube to the
furnace combustion air collar using two (2)
sheet metal screws. (Screw holes are provided in combustion air tube and furnace combustion air collar.
(See Figure 15.)
COMBUSTION
AIR TUB E COLLAR
FRONT OF FURNACE
K #8 OR #10
SCREWS RECOMMENDED
Figure 15 — Connecting Roof Jack to Furnace
16
IMPORTANT
VENT SYSTEM INSTALLATION INSTRUCTIONS
NEW HOME INSTALLATION
WARNING
IF THIS FURNACE IS INSTALLED ON A NEW HOME DO
THE FOLLOWING
FAILURE TO FOLLOW ALL VENTING INSTRUCT -IONS CAN RESULT IN FIRE, ASPHYXIATION, OR
EXPLOSION.
The vent system is an important part of your furnace installation. Carefully read and observe the following basic
instructions, as well as those pack ed with the vent system.
EXISTING FURNACE REPLACEMENT
IF THIS FURNACE REPLACES AN EXISTING FURNACE,
DO THE FOLLOWING.
nd
1. If a 2
existing roof of the home, remove the old vent system
completely!... to avoid the possibility of an improperly installed pipe or gaps in the old vent system,
INSTALL A NEW VENT SYSTEM. Your ceiling and
roof height will determine the correct vent system to
use. Refer to the vent selection table, of the furnace
installation instructions.
2. After unpacking the vent system, check the rain caps.
Insure they are not damaged, tilted or crooked. Do not
twist, crush or sit on the roof caps during installation. Damaged roof caps will cause improper furnace
operation. The furnace will not h eat properly and could
result in explosion.
roof, roof cap or addition has been made to the
1. Inspect the furnace top collars for signs of insulation or
ceiling debris which might have fallen in during cutting
of the ceiling and roof holes. Remove all debris before
continuing.
2. After unpacking the vent system, check the rain caps.
Insure they are not damaged, tilted or crooked. Do not
twist, crush or sit on the roof caps during installation. Damaged roof caps will cause improper furnace
operation. The furnace will not h eat properly and could
result in explosion.
3. Before inserting the vent pipe into the furnace top, inspect the furnace flue and combustion air opening for
debris or insulation which might have fallen in during
pre---installation steps. Do not proceed unless all debris have been cleaned out or removed.
4. After installing vent pipe on furnace top collar, check to
make sure there is no gap in back or side between the
pipe collar and the furnace casing top.
INSTALLATION IN SNOW REGIONS
When the combustion air pipe inlet is covered or blocked
with snow, the furnace will not operate properly due to the
depleted combustion air supply.
Therefore, if the furnace will be located in regions where
snow accumulation on the roof exceeds 7” or in H.U.D.
Snow Load Zones, a # 7680B6541 roof jack extension is
recommended.
3. After installing vent pipe on furnace top collar, check to
make sure there is no gap in back or side between the
pipe collar and the furnace casing top.
4. Use only the pipes provided with the roof jack assembly. Do not add to or adapt other sheet metal pipes. Do
not cut, insert or add other pipes to this assembly.
5. In no case should there be a gap between sections of
thefluepipeorthecombustionairpipe.
17
ELECTRICAL WIRING
CAUTION
TO INSTALLER: INCOMING POWER MUST BE POLARIZED. OBSERVE COLOR CODING.
DANGER
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 and
wrap with electrical tape.
d. Connect the “ground” wire to t he grounding screw.
e. Reinstall the control panel cover and secure
mounting screw.
-- SHOCK HAZARD --
DISCONNECT ELECTRICAL POWER SUPPLY TO THE
UNIT BEFORE SERVICING TO AVOID THE POSSIBILITY OF SHOCK INJURY OR DAMAGE TO THE EQUIPMENT.
CONNEC T POWER SUPPLY WIRES
a. Remove the field w iring cover.
b. Insert 115 volt wires through the large plastic bush-
ing on the left side of the furnace ( See Figure 16).
If conduit is used it should be secured to the control
box.
CONNECT THERMOSTAT WIRES
a. Insert 24 volt wires through the small plastic bush-
ing just a bove the control panel.
b. Connect the thermostat wires to the furnace low
voltage pigtails (See Figure16).
c. Connect low---voltage circuit to the wall thermostat
pigtails.
A separate 120 V.A.C. supply circuit must be used for the
furnace. The circuit should be protected by a 15 amp fuse
or circuit breaker.
This screw does not
need to be removed in
order to remove the
field wiring cover. (just
loosen).
WALL THERMOSTAT
Avoid locations where the thermostat could be subject to
drafts from outside, or exposed to direct light from lamps,
sun, fireplaces, etc., or affected by air from a duct register
blowing directly on the thermostat.
NOTE:
Cover should
not be removed
except when
servicing the
controls.
Figure 16
The wall thermostat should be mounted approximately 5
feet from the floor. The preferred location is on an inside
wall situated in an area with good air circulation, and where
the temperature will be reasonably representative of other
living areas the thermostat is controlling.
18
THERMOSTAT WIRING FO R DGAT AND DGAM SERIES
Blend Air
Control Box
White
Red
Green
Black
Wall Thermostat
White
Green
Red
Yellow
White
Green
Red
Black
Yellow
Condensing
Unit
Furnace Control Box
Not Factory Installed
Figure17 -- Thermostat Wiring
19
THERMOSTAT WIRING FOR DLAS (HEAT ONL Y) SERIES
W
Wall Thermostat
(Rear View)
White
Red
R
White
Green
Black
Red
Yellow
Furnace Control Box
Figure17a --- Thermostat Wiring for DLASSeries
20
Blend Air
Control Box
(If equipped)
Upper
Limit Switch
W
G
RH
Y
Wall
Thermostat
To A /C
Condensing
Unit (If
equipped)
Blower
Motor
BLK
GRN
RED
WHT
WHT
GRN
BLK
RED
YEL
BLK
BLU
GRY
1 2 3 4 5 6 7 8 9
W
G
C
R
Y
BRN
BRN
9
8
7
6
5
WHT
4
3
2
1
NEUTRALS
BLK
RED
WHT
WHT
HEAT
COOLL1XFMR
BLK
BLK
Transformer
BRN
BLU
LINE
LOAD
GRN
BLU
6
5
4
3
2
1
BLU
ORG
BLK
BLK
WHT
WHT
COM
RED
24
VAC
Lower
Limit
Switch
YEL
Centrifugal
Switch
Combustion
Blower
Motor
To Earth Ground
115
{
VAC
Incoming Power Must
Be Polarized. Observe
Color Coding
Neutral
L1
Ground
Screw
BLK
System
Switch
Figure 18 -- DGAT Series Wiring Diagram
21
2
1
Hot Surface
Ignitor
Gas
Valve
Sensor Rod
Blend Air
Control Box
(If equipped)
Upper
Limit
Switch
W
G
RH
Y
Wall
Thermostat
To A / C
Condensing
Unit (If
equipped)
Blower
Motor
BLK
GRN
RED
WHT
WHT
GRN
BLK
RED
YEL
WHT
BLK
RED
BLU
GRY
1 2 345
W
G
C
R
Y
9
8
7
6
5
WHT
4
3
2
1
NEUTRALS
BLK
RED
WHT
WHT
HEAT
COOLL1XFMR
6 7
8 9
BLU
BRN
BRN
BLK
BLK
LINE
LOAD
Transformer
GRN
BLU
6
5
4
3
2
1
BLU
ORG
BLK
BLK
WHT
WHT
COM
RED
24
VAC
Lower
Limit
Switch
YEL
Centrifugal
Switch
Combustion
Blower
Motor
To Earth Ground
115
VAC
{
Neutral
L1
Incoming Power Must
Be Polarized. Observe
Color Coding
Ground
Screw
BLK
System
Switch
Figure 19 -- DGAM Series Wiring Diagram
22
2
1
Hot Surface
Ignitor
Gas
Valve
Sensor Rod
GAS PIPING
INSTALLATION AND CHECKING OF GAS LINE
Gas Supply piping must be sized in accordance with the
recommendations contained in “American National Standard Institute Installation of Ga s Piping” ANSI 223.1 unless
local codes or regulations state otherwise.
Materials used and pipe sizing for U.S. mobile homes must
comply with requirements contained in Mobile Homes
A119.1, Recreational Vehicles A119.2 and H.U.D. Title 24,
Section 280.705 and any local or state codes.
NOTE
Thegaslineinletonthegasvalveis1/2--- 1 4 N . P.T. T h e g a s
line may be installed through the furnace floor or furnace
side to the gas valve.
CAUTION
To install gas line and to connect it to the gas valve, care
must be taken to hold gas valve firmly to prevent misalignment of the burner orifice, or to damage gas valve
which could result in improper heating, explosion, fire
or asphyxiation.
DO NOT USE EXCESSIVE PIPE SEALANT ON PIPE
JOINTS. Pipe sealant, metal chips or other foreign material that could be deposited in the inlet of the gas
valve, when gas pipe is installed or carried through the
gas piping into the gas valve inlet after installation, may
cause the gas valve to malfunction and could result in
possible improper heating, explosion, fire or asphyxiation. Al so, pipe sealant must be resistant to Propane
gas.
Where regulations require, a main shut--off valve shall
be installed externally of furnace casing. After piping
has been installed, turn gas on and check all connections with a leak detector or soap solution.
NEVER USE OPEN FLAME. FIRE OR EXPLOSION
COULD OCCUR.
Do not test the fuel system at more than 14” W.C. after
furnace has been connected to fuel line. Such testing
could void the warranty. Any test run above 14” W.C.
may damage furnace control valve which could cause
an explosion, fire or asphyxiation.
IMPORTANT
When converting valve from or to Propane gas, it will be
necessary to change main burner orifice to prevent an underfired or overfired condition. See furnace nameplate for
complete instructions.
CAUTION
If the gas input to the furnace is too great because
of excessive gas pressure, wrong size orifice, high
altitude, etc., the burner flame will be sooty and
may produce carbon monoxide, which could result
in unsafe operation, explosion, and/or fire or asphyxiation.
Observing Burner Operation
1. Observe burner to make sure it ignites. Observe color
of flame. On natural gas the flame will burn blue with
appreciably yellow tips. On Propane gas a yellow flame
maybeexpected.Ifflameisnotthepropercolorcalla
qualified serviceman for service.
2. Let furnace heat until blower cycles on.
3. Turn thermostat down.
4. Observe burner to make sure it shuts off.
5. Let the furnace cool and blower cycle off.
WARNING
Should overheating occur, or the gas supply fail to
shut off, shut off the manual gas valve to the furnace and allow burner to run until furnace cools
down and blower shuts off before shutting off the
electrical supply.
If any abnormalities are observed when checking for correct operation, such as burner failing to ignite or to turn off,
sooty flame, etc., call your nearest authorized service technician as shown in the Service Center List included in the
home owner envelope with the furnace.
Combustion Air
A dirt leg may be required by some local codes to trap moisture and contaminations.
For NAT. gas operation, the furnace is designed for 7” W.C.
inlet gas pressure. Pressure to main burner is then reduced
1
to 3
/2”W.C.
For Propane gas operation, the furnace is designed for 11”
W.C. inlet gas pressure. Pressure to main burner is then
reduced to 10” W.C.
In order for the burner flame to burn efficiently, it must receive adequate combustion air.
The amount of combustion air can be changed by operating the combustion air adjustment rod located beneath the
gas valve. (See Figures 19 and 20.)
The adjustment rod is set at an “average” position at the
factoryandmaybeproperlysetformanyapplications.
23
However, the amount of combustion air required will vary
depending on altitude, actual BTU. content of the gas being used, gas pressure, conversion to another gas, and
other variable factors.
Therefore, it is essential that the burner flame be observed
and any necessary adjustments are made before the furnace is put into service at the final home site. Adjusting the
burner air is considered part of the normal home set ---up
procedure and is the responsibility of either t he home seller
or buyer, depending on their agreement. Adjustments of
this type are not covered by the warranty.
CAUTION
Combustion air adjustments must be made only by
a qualified technician. Improper air adjustment
may cause unsafe operati on, explosion or asphyxiation.
View of Burner Through the Observation Window
To adjust the combustion air:
1. To light and operate furnace see label inside lower furnace door .
2. Allow the burner to burn for about 1 MINUTE.
3. Look through the observation window and observe the
appearance of the flame.
4. On natural gas, the base of the flame should be blue
but the tips of the flame will be yellow. (See Figure 20.)
5. On Propane gas, almost all of the flame will be yellow
although some blue should still be present at the base
of the flame next to the end of the burner. (See Figure
21.)
6. If the flame is too yellow, the combustion air should be
increased. If the flame is excessively blue (no yellow)
the combustion air should be decreased.
7. To adjust the combustion air, loosen the lock screw
holding the combustion air rod in place. Push in on the
rod to increase the combustion air. Pull out on the combustion air rod to decrease the combustion air. Tighten
lock screw after adjustment is made. Do not completely close air damper at any time. Complete closure of air
damper to burner will result in improper operation. See
caution above.
Correct Amount of
Primary Air
Correct Amount of
Primary Air
Too Little Primary Air
Push Shutter Rod In
Figure 20 -- Natural Gas Flame Appearance
Too Little Primary Air
Push Shutter Rod In
Figure 21 -- Propane Gas Flame Appearance
Too Much Primary Air
Pull Shutter Rod Out
Too Much Primary Air
Pull Shutter Rod Out
24
If Furnace Fails to Operate Properly
1. Check setting of thermostat --- and position of HEAT/
COOL switch if air conditioning is installed. If a set --back type thermostat is employed be sure that the thermostat is in the correct operating mode.
2. Check to see that electrical power is ON.
3. Check to see that the knob on the gas control valve is
in the full ON position.
FINAL PROCEDURE
4. Make sure filters are clean, return grilles are not ob structed, and supply registers are open.
5. Be sure that furnace flue piping is open and unobstructed.
If the cause for the failure to operate is not obvious, do
not attempt to service the furnace yourself. Call a qualifiedserviceagencyoryourgassupplier.
Install Furnace Doors
Install the bottom door first by holding the door flush
against the casing and sliding the door down until the
door top and bottom flanges rest in the casing channels. Then install the upper door in the same manner.
Finish and Trim
Alcove and Closet Installations may now be finished and trimmed as necessary.
Leave enough gap above upper furnace door to allowit
to be lifted and removed.
NOTE
See nameplatefor conversion and lighting instructions. Obtain a temperature rise within the ranges specified on the
name plate.
Furnace and Air Conditioner Installations
In an air conditioner is installed w hich does not use the
blower for air distribution and operates completely independent of the furnace, the thermostat system must have
an interlock to prevent the furnace and air conditioner form
operating at the same time. This interlock system usually
contains a heat---cool switch which must be turned to either
HEAT or COOL to activate either heating or cooling operation, or a positive OFF switch on the cooling thermostat.
When used in connection with a cooling unit the furnace
shall be installed parallel with or on the upstream side of the
cooling unit to avoid condensation in the heat exchanger.
For installations with a parallel flow arrangement, the furnace must be equipped with a damper to prevent cold air
from being discharged up around the heat exchanger.
Cold air causes condensation inside the exchanger and
can cause it to rust out w hich can allow products of combustion to be circulated into the living area by the furnace
blower resulting in possible asphyxiation. An air flow activated automatic damper, P/N 7900 ---6771, is available from
furnace manufacturer.
SUPPLY DUCT
OPENING
Furn ace
Base
Note: For best air delivery install damper with blades
parallel to supply duct.
Figure 22 --Anti--Backflow Damper
Automatic
Damper
Duct Connector
25
Part #
Part #
Drill
Orifice /
Part # Output
Drill
Orifice /
PROPANE
Part # Output
Drill
Orifice /
Part # Output
Drill
Orifice /
Part # Output
NATURAL GAS
Drill
Orifice /
Part # Output
Drill
Orifice /
Part # Output
MANUFACTURED HOUSING DERATION CHART — DGAM, DGAT, DLAS Series
56,000 — Input 70,000 — Input 75,000 — Input 90,000 — Input
Drill
Orifice /
47,000 .082 / 45 9951---0821 57,000 .093 / 42 9951 --- 0931 60,000 .096 / 41 9951 --- 0961 72,000 . 104/ 37 9951---1041
Elevation Output
0 --- 2000
(Factory)
2,000 43,240 .082 / 46 9951---0821 52,440 .093 / 42 9951 --- 0931 55,200 .093 / 42 9951 ---0931 66,240 .101 / 38 9951---1011
3,000 41,360 .078 / 47 9951---0781 50,160 .089 / 43 9951 --- 0891 52,800 .093 / 42 9951 ---0931 63,360 .099 / 39 9951---0991
4,000 39,480 .078 / 47 9951---0781 47,880 .089 / 43 9951 --- 0891 50,700 .093 / 42 9951 ---0931 60,430 .099 / 39 9951---0991
5,000 37,600 .078 / 47 9951---0781 45,600 .089 / 43 9951 --- 0891 48,000 .089 / 43 9951 ---0891 57,600 .098 / 40 9951---0981
6,000 35,720 .076 / 48 9951---0761 43,320 .086 / 44 9951 --- 0861 45,600 .089 / 43 9951 ---0891 54,720 .096 / 41 9951---0961
7,000 33,840 .076 / 48 9951---0761 41,040 .086 / 44 9951 --- 0861 43,200 .086 / 44 9951 ---0861 51,840 .093 / 42 9951---0931
8,000 31,960 .073 / 49 9951---0731 38,760 .082 / 45 9951 --- 0821 40,800 .086 / 44 9951 ---0861 48,960 .093 / 42 9951---0931
9,000 30,080 .073 / 49 9951---0731 36,480 .082 / 45 9951 --- 0821 38,400 .082 / 45 9951 ---0821 46,080 .089 / 43 9951---0891
10,000 28,200 .073 / 50 9951---0731 34,200 .078 / 47 9951 --- 0781 36,000 .082 / 46 9951 ---0821 43,200 .089 / 43 9951---0891
26
56,000 — Input 70,000 — Input 75,000 — Input 90,000 — Input
Drill
Orifice /
46,000 .128 / 30 9951---1281 56,000 .149 / 25 9951 --- 1491 59,000 .154 / 23 9951 ---1541 72,000 .177 / 16 9951---1771
Elevation Output
0 --- 2000
(Factory)
2,000 42,320 .128 / 30 9951---1281 51,520 .149 / 25 9951 --- 1491 54,280 .149 / 25 9951 ---1491 66,240 .173 / 17 9951---1731
3,000 40,480 .120 / 31 9951---1201 49,280 .144 / 27 9951 --- 1441 51,920 .149 / 25 9951 ---1491 63,360 .169 / 18 9951---1691
4,000 38,640 .120 / 31 9951---1201 47,040 .144 / 27 9951 --- 1441 49,560 .144 / 27 9951 ---1441 60,480 .169 / 18 9951---1691
5,000 36,800 .120 / 31 9951---1201 44,800 .140 / 28 9951 --- 1401 47,200 .144 / 27 9951 ---1441 57,600 .166 / 19 9951---1661
6,000 34,960 .120 / 31 9951---1201 42,560 .140 / 28 9951 --- 1401 44,840 .144 / 27 9951 ---1441 54,720 .166 / 19 9951---1661
7,000 33,120 .116 / 32 9951---1161 40,320 .136 / 29 9951 --- 1361 42,480 .140 / 28 9951 ---1401 51,840 .161 / 20 9951---1611
8,000 31,280 .116 / 32 9951---1161 38,080 .136 / 29 9951 --- 1361 40,120 .136 / 29 9951 ---1361 48,960 .157 / 22 9951---1571
9,000 29,440 .113 / 33 9951---1131 35,840 .128 / 30 9951 --- 1281 37,760 .136 / 29 9951 ---1361 46,080 .154 / 23 9951---1541
10,000 27,600 .110 / 35 9951---1101 33,600 .128 / 30 9951 --- 1281 35,400 .128 / 30 9951 ---1281 43,200 .149 / 25 9951---1491
Above 2,000 feet: Derate furnace output capacity @ 4% per 1,000 feet of elevation.
Orifice deration = 2% for each 1,000 feet of elevation. High altitude oxygen level deration = 2% per 1000 feet of elevation.
Adjust air shutter for correct flame color.
DGAM, DGAT & DLAS SERIES
HSI Gas Downflow Furnace
Repair Parts List for:
DGAM056BDD DGAT056BDD DLAS056BDD DGAT070BDD DGAM075BDD DGAT075BDD DLAS075BDD DGAT090BDD
20
21
45
40
41
43
44
2
3
5
6
4
7
8
9
15
BURNER
ORIFICE
(SEE CHART)
18
39
22
42
36
21
23
10
32
33
31
24
17
34
29
12
37
38
CODE
USED ON
MODEL
NO.
REQ.
PAR T
NUMBER
__ ALL X 8B246P
8B247P
2 ALL 1 7945A5721 Casing Top
3 ALL 1 7990 --- 3591B Limit Switch (Upper)
*
4 ALL 1 7990 --- 6451 Booster Assembly (Includes Code 5 --- 9)
5 ALL 1 7995A386 Booster Gasket
6 ALL 1 2900 --- 3601 Impellor (3
7 ALL 1 2900 --- 147 Mount Plate (Booster Motor)
8 ALL 1 7990 --- 300 Motor Mount Plate Gasket
9 ALL 1 7990 --- 317P Booster Motor --- 3000 RPM
*
B
NOTE: The 7624A3591 (180˚ Manual Reset) is a designed approved alternate for this limit switch.
25
DESCRIPTION
Enamel (Spray 15 oz. Almond)
Enamel (Spray 15 oz. White)
(180˚ Manual Reset)
13
/16x17/8x1/4)
27
26
DGAM, DGAT, & DLAS SERIES
HSI GAS DOWN FLOW FURNACE
USED ON
CODE
10 ALL 1 7945--- 1351/B Cover (Control Box)
12 ALL 1 7990--- 319P Integrated Control
*
15 ALL 1 7990--- 326PBB Gas Valve (24V .5 Amp1/2”x3/8”)
*
1 6 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --17 ALL 1 7945--- 5151/C Valve Bracket
18 DGAM,DGAT 1 7956A5201 Panel (Coil Cavity 19
1 9 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --20 ALL 1 7670--- 368P/A Thermostat (Adj. Ant.)
*
21 ALL 1 7945--- 3011 Gasket Pkg. (Heat Exchanger)
22 ALL 1 7995--- 5751 Heat Exchanger (with Gaskets)
23 ALL 1 7975--- 3881 Remote Sensor
*
24 ALL 1 7681--- 3301 System Switch
25 ALL 1 7956--- 1121 Junction Box Cover
26 ALL 1 2940A3541 Transformer (115 --- 24V 40VA)
*
29 056
*
31 ALL 1 7970--- 5851/A Burner Assembly (Less Gas Valve ---
32 ALL 1 1474--- 0521 Hot Surface Ignitor
*
33 ALL 1 7970--- 179 Ignitor Shield
34 ALL 1 7945--- 1631/A Mounting Plate (Burner)
3 5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --36 ALL 1 1214--- 2511 Filter (16 x 20 x 1 Disposable) (2 Required)
*
37 DGAM
38 DGAM,DGAT
MODEL
070,075
090
DLAS, DGAT11
DLAS
NO.
REQ.
1 7945 ---3281/A
1
1
1
PAR T
NUMBER
7970--- 3281/A
7995--- 3381/A
7975--- 1561/B
7990--- 1561/A
7956--- 1571/A
7956--- 1631/A
DESCRIPTION
13
/16”
L i m i t S w i t c h ( O P E N --- 1 4 0 ˚ C L O S E --- 1 1 0 ˚)
L i m i t S w i t c h ( O P E N --- 1 4 5 ˚ C L O S E --- 1 1 5 ˚)
L i m i t S w i t c h ( O P E N --- 1 5 0 _ C L O S E --- 1 2 0 _)
Includes Codes 32, 33, 34)
Panel (Upper)(White)
Panel (Upper)(White)
Panel (Lower)(White)
Panel (Lower)(White)
BLOWER PARTS
39 DGAM 1 1468--- 220P Motor
*
DGAT, DLAS
(057, 070, 075)
090 1 1468--- 212P Motor
40 All 1 7966A530 Scroll
41 All 1 2702 ---4091 Motor Mount(3/Pkg.)
42 All 1 7680 ---348 Connector Plug
43 All 1 7670 ---6391 Motor Clamp
44 090
*
45 All 1 1472 ---2751 Blower Wheel
DGAM
1 7966 ---311P Motor
1
1
1499--- 4461
1499--- 4471
Run Capacitor
Run Capacitor
(10 5/8 Dia. x 7 1/8 x 1/2)
BURNER ORIFICE CHART
MODEL 056 070 075 090
Nat. 9951--- 1281 9951--- 1491 9951--- 1541 9951--- 1771
LP 9951--- 0821 9951--- 0931 9951--- 0961 9951--- 1041
BB NOTE: The 7707--- 326P is a designed approved alternate for this valve.
NOTE: All parts with three digit suffix numbers are “Special Order” Parts. These parts are subject to factory availability and require extra
time for delivery.
* Suggested Parts Inventory (2% of Units Installed ---Minimum 1 each)
1973--- 106/B Rev.5 (4/97) P.I.
Evcon Industries, Inc.
3110 North Mead
P.O. Box 19014
Wichita, KS 67204--- 9014
28
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