Suburban SFV-30 Installation guide
SUBURBAN
RV FURNACE
SERVICE & TRAINING
MANUAL
TABLE OF CONTENTS
PAGE
Furnace Introduction / Model & Serial Number Information ............................................................... 3
General Service Information / Cautions & Safety Information............................................................ 4
............................................................................................................... 5
Furnace Removal ............................................................................................................................... 6
Installation Information ....................................................................................................................... 8
Vent Assembly Installation.................................................................................................................. 9
Return Air & Ducting Information...................................................................................................... 19
Return Air & Ducting Requirements.................................................................................................. 20
Electrical Supply Information............................................................................................................ 23
................................................................................................................... 24
Sequence of Operation (12 VDC 520820 Fan Control Module Board) ............................................ 26
Sequence of Operation (24 VAC 520947 Fan Control Module Board)............................................. 27
Sequence of Operation (SHD-2542 Furnace) .................................................................................. 28
Sequence of Operation (Time Delay Relay Equipped Furnaces)..................................................... 29
...................................... 30
........................ 31
....................... 32
Furnace Wiring Diagrams................................................................................................................. 34
................................................ 37
........................................................................... 38
Maintenance..................................................................................................................................... 39
3
FURNACE INTRODUCTION
address: [email protected]
MODEL & SERIAL NUMBER INFORMATION
MODEL NO. / NUMÉRO DE MODÉLE
SF-35F
SERIAL NO./ NUMÉRO DE SÉRIE
093102771
STOCK NO. 2332
INPUT BTU/HR. 35,000 @
DEBIT 10.0” W.C.
CALORIFIQUE
OUTPUT BTU/HR. 27,300
CLARIFIQUE
MANIFOLD PRESSURE 10.0” W.C.
PRESSION TUBULURE
ORIFICE SIZE #51
DIMENSION DE L’INJECTEUR
TYPE OF GAS LP
ESPECE DE GAZ
MODEL BREAKDOWN
SF-35F
Suburban Furnace
35,000 BTU
Front Gas
SERIAL # BREAKDOWN
093102771
Year of MFG (2009)
Sequential SR#(02771)
4
GENERAL SERVICE INFORMATION
GAS SUPPLY PRESSURE REQUIREMENTS
*WC - water column
VOLTAGE REQUIREMENTS
VOLTAGE DC:
SERVICE TOOLS REQUIRED
Manometer gauge/ U-Tube
Module board tester #641511
Safety glasses
CAUTIONS & SAFETY INFORMATION
operation.
electrode assembly on remote sense units.
obstructed.
requirements.
model furnace.
5
SUBURBAN RV FURNACES
SPEC SHEET BTU/h
INPUT Height Width Depth Ignition Shipping
Weight
12 VDC DIRECT DISCHARGE
NT-16SE 16,000 Electronic 27
NT-20SE 19,000 Electronic 27
12 VDC DUCTED FURNACES
NT-16S 16,000 Electronic 27
NT-20S 19,000 Electronic 27
30,000 Electronic 40
34,000 Electronic 40
NT-40 40,000 Electronic 42
SF-20/20F 20,000 Electronic 35
SF-25/25F 25,000 Electronic 35
SF-30/30F 30,000 Electronic 35
SF-35/35F 35,000 Electronic 35
SF-42/42F 40,000 Electronic 35
SH-35/35F 35,000 Electronic 40
SH-42/42F 40,000 Electronic 42
SF-20Q/20FQ 20,000 Electronic 35
SF-25Q/25FQ 25,000 Electronic 35
SF-30Q/30FQ 30,000 Electronic 35
SF-35Q/35FQ 35,000 Electronic 35
SF-42Q/42FQ 40,000 Electronic 35
SH-35Q/35FQ 35,000 Electronic 40
SH-42Q/42FQ 40,000 Electronic 42
Accessories Description
6258ACW
6267ACW
SFV-20 20,000 Electronic 35
SFV-25 25,000 Electronic 35
SFV-30 30,000 Electronic 35
SFV-35 35,000 Electronic 35
SFV-42 40,000 Electronic 35
SHD-2542 25/40,000 Electronic 44
120 VAC PARK MODEL FURNACES
40,000 Electronic 46
Accessories Description
050733 Duct Cover
050715
051240
280552
062164
070853
520009
520576
520753
520864
6
FURNACE REMOVAL
SUBURBAN family of RV
steps:
DD-17DSI
1.
2.
3.
4.
5. Remove duct from side of furnace, if equipped.
6.
7.
8.
9.
NT-12/16/20S
1.
2.
3.
4.
5.
applicable parts.
6.
7.
NT-12/16/20SE
1.
2.
3.
4.
5.
applicable parts.
6.
7.
NT-24/30/34SP and NT-40
1.
2.
NT-40.
3.
4.
5.
applicable parts.
6.
7.
7
FURNACE REMOVAL
SF-20/25/30/35/42, SF-20Q/25Q/30Q/35Q/42Q, SFV-20/25/30/35/42,
SH-35/42 and SHD-2542
1.
2.
3.
4.
applicable parts.
5.
6.
SF-20/25/30/35/42F, SF-20FQ/25FQ/30FQ/35FQ/42FQ,
SFV-20/25/30/35/42F and SH-35/42F
1.
2.
3.
4.
5.
applicable parts.
6.
7.
NOTE: ON SFV MODELS, REMOVE EXTRA SCREWS FOR CHAMBER REMOVAL.
P-30S and P-40
1.
2.
3.
4.
5.
applicable parts.
6.
7.
8
INSTALLATION INFORMATION
1. Selecting a Location
2. Venting
3. Return Air
4. Ducting
5. Electrical Supply
Location and Installation
Figure 1
9
VENT ASSEMBLY INSTALLATION
VENTING
a minimum
of 1/2” on intake, and 1 1/4” on exhaust.
CAULK BEHIND VENT CAP AS SHOWN TO SEAL
BETWEEN EXHAUST AND INTAKE AND TO
PREVENT MOISTURE INSIDE FURNACE
COMPARTMENT. APPLY CAULKING GENEROUSLY
AROUND PERIMETER OF VENT CAP AND ACROSS
CENTER AS SHOWN. CENTER PUTTY STRIP IS
ESSENTIAL.
OUTSIDE SKIN (PANEL)
TUBE, INTAKE AIR
WITH GASKET
VENT CAP AND
EXHAUST
DETAIL "A"
2" MAXIMUM WALL THICKNESS
TUBE, AIR INTAKE
WITH GASKET
VENT CAP AND
EXHAUST TUBE
SEE DETAIL "A"
OUTSIDE SKIN (PANEL)
REMOVABLE PANEL OF
COACH WALL MUST
SEAL WATER TIGHT
FURNACE CABINET
FRONT
ELECTRICAL
CONNECTION
GAS CONNECTION
INSIDE WALL
(2) 2 1/4"
DIA. HOLES
Figure 2 • SF & SFQ MODELS
17 3"
4
87"
8
613"
16
313"
16
33"
8
2" MAXIMUM WALL THICKNESS
TUBE, AIR INTAKE
WITH GASKET
VENT CAP AND
EXHAUST TUBE
SEE DETAIL "A"
OUTSIDE SKIN (PANEL)
REMOVABLE PANEL OF
COACH WALL MUST
SEAL WATER TIGHT
FURNACE CABINET
FRONT
ELECTRICAL
CONNECTION
GAS CONNECTION
INSIDE WALL
(2) 2 1/4"
DIA. HOLES
C
L
94
3"
CAULK BEHIND VENT CAP AS SHOWN TO SEAL
BETWEEN EXHAUST AND INTAKE AND TO
PREVENT MOISTURE INSIDE FURNACE
COMPARTMENT. APPLY CAULKING GENEROUSLY
AROUND PERIMETER OF VENT CAP AND ACROSS
CENTER AS SHOWN. CENTER PUTTY STRIP IS
ESSENTIAL.
DETAIL "A"
VENT CAP AND
EXHAUST
TUBE, INTAKE AIR
WITH GASKET
OUTSIDE SKIN (PANEL)
Figure 2A • SH MODELS
10
Figure 3 • SF & SFQ MODELS
Figure 3A • SH & SHD-2542 MODELS
VENT ASSEMBLY INSTALLATION
2" MAX.
C
L
97
64
18 32
7
89
32
FURNACE
TIE-DOWN SCREW
(FURNACE TO CABINET)
OUTSIDE SKIN
CAULK ALONG THE EDGE OF THE CUTOUT
(ALL THE WAY AROUND)
ANCHOR FURNACE CABINET TO COACH
FLOOR (2) PLACES AS ILLUSTRATED
BACK OF CABINET MUST BUTT
AGAINST THIS EDGE OF THE FRAME
DOOR FRAME
AIR INTAKE TUBE
WITH GASKET
6 SCREWS
(SUPPLIED)
VENT CAP & EXHAUST TUBE
4 SCREWS
DOOR MOUNTING
FURNACE ACCESS DOOR
SECURE FRAME TO
OUTER PANEL WITH SCREWS
(16 PLACES)
GAS
CONNECTION
ELECTRICAL
CONNECTION
CAULK BEHIND VENT CAP AS SHOWN TO SEAL
BETWEEN EXHAUST AND INTAKE AND TO PREVENT
MOISTURE INSIDE FURNACE COMPARTMENT. APPLY
CAULKING GENEROUSLY AROUND PERIMETER OF
VENT CAP AND ACROSS CENTER AS SHOWN. CENTER
PUTTY STRIP IS ESSENTIAL.
2" MAX.
C
L
97
64
18 32
7
10 1
32
FURNACE
TIE-DOWN SCREW
(FURNACE TO CABINET)
OUTSIDE SKIN
CAULK ALONG THE EDGE OF THE CUTOUT
(ALL THE WAY AROUND)
ANCHOR FURNACE CABINET TO COACH
FLOOR (2) PLACES AS ILLUSTRATED
BACK OF CABINET MUST BUTT
AGAINST THIS EDGE OF THE FRAME
DOOR FRAME
AIR INTAKE TUBE
WITH GASKET
6 SCREWS
(SUPPLIED)
VENT CAP & EXHAUST TUBE
4 SCREWS
DOOR MOUNTING
FURNACE ACCESS DOOR
SECURE FRAME TO
OUTER PANEL WITH SCREWS
(16 PLACES)
GAS
CONNECTION
ELECTRICAL
CONNECTION
CAULK BEHIND VENT CAP AS SHOWN TO SEAL
BETWEEN EXHAUST AND INTAKE AND TO PREVENT
MOISTURE INSIDE FURNACE COMPARTMENT. APPLY
CAULKING GENEROUSLY AROUND PERIMETER OF
VENT CAP AND ACROSS CENTER AS SHOWN. CENTER
PUTTY STRIP IS ESSENTIAL.
11
Figure 4 • SF & SFQ MODELS
SH-35F, SH-42F STANDARD VENT INSTALLATION
X"
INTAKE: 1/2" MINIMUM OVERLAP
EXHAUST: 1 1/4" MINIMUM OVERLAP
23
4
DIA.
23
4
DIA.
C
L
L
CEXHAUST INTAKE
X" DIMENSION
0" TO 1 1/2"
1 1/2" TO 3"
3" TO 4 1/2"
4 1/2" TO 7 1/2"
7 1/2" TO 9"
EXTENSION TUBES KIT NO.
520767
520768
520769
520551
USE VENT SUPPLIED WITH FURNACE
TRAILER SKIN
VENT CAP
FRONT GAS
HOOKUP
MOUNTING
SURFACE
NEVER INSTALL THE EXHAUST TUBE WITH LESS THAN 1 1/4" OVERLAP,
OR THE INTAKE TUBE WITH LESS THAN 1/2" OVERLAP.
STANDARD VENT ASSEMBLY FURNISHED WITH FURNACE. SPECIAL
EXTENSION TUBES, IF NEEDED, MUST BE ORDERED SEPARATELY.
EXTENSION KITS COME WITH COMPLETE INSTALLATION INSTRUCTIONS.
1"
Figure 4A • SH Models
VENT ASSEMBLY INSTALLATION
SF-20F, SF-25F, SF-30F, SF-35F, SF-42F, STANDARD VENT INSTALLATION
X"
INTAKE: 1/2" MINIMUM OVERLAP
EXHAUST: 1 1/4" MINIMUM OVERLAP
23
4
DIA.
23
4
DIA.
C
L
L
CEXHAUST INTAKE
X" DIMENSION
0" TO 1 1/2"
1 1/2" TO 3"
3" TO 4 1/2"
4 1/2" TO 7 1/2"
7 1/2" TO 9"
EXTENSION TUBES KIT NO.
520767
520768
520968
520551
USE VENT SUPPLIED WITH FURNACE
TRAILER SKIN
VENT CAP
FRONT GAS
HOOKUP
MOUNTING
SURFACE
NEVER INSTALL THE EXHAUST TUBE WITH LESS THAN
1 1/4" OVERLAP, OR THE INTAKE TUBE WITH LESS THAN
1/2" OVERLAP.
STANDARD VENT ASSEMBLY FURNISHED WITH FURNACE.
SPECIAL EXTENSION TUBES, IF NEEDED, MUST BE
ORDERED SEPARATELY. EXTENSION KITS COME WITH
COMPLETE INSTALLATION INSTRUCTIONS.
1"
12
Figure 5
Figure 5A
8.281"
2.000" MAX.
18.218"
BACK OF CABINET MUST BUTT
AGAINST THIS EDGE OF FRAME
DOOR FRAME
SECURE FRAME TO OUTER PANEL
WITH SCREWS (16 PLACES)
4 SCREWS
DOOR MOUNTING
FURNACE ACCESS DOOR
AIR INTAKE TUBE WITH GASKET
VENT CAP & EXHAUST TUBE
CAULK ALONG THE EDGE OF THE
CUTOUT (ALL THE WAY AROUND)
6 SCREWS SUPPLIED
ELECTRICAL CONNECTION
GAS CONNECTION
(REAR)
FURNACE
FLOOR
ANCHOR FURNACE
TO FLOOR USING
(2) #10 X 3/4
SCREWS PROVIDED
TIE-DOWN SCREW
OUTSIDE SKIN
(FURNACE TO CABINET)
SPACERS ON LEFT SIDE
OF FURNACE ARE FLUSH
WITH LEFT SIDE OF
CUTOUT
CABINET MOUNTING
BRACKET
CAULK BEHIND VENT CAP AS SHOWN TO SEAL BETWEEN EXHAUST
AND INTAKE AND TO PREVENT MOISTURE INSIDE FURNACE
COMPARTMENT. APPLY CAULKING GENEROUSLY AROUND PERIMETER
OF VENT CAP AND ACROSS CENTER AS SHOWN. CENTER PUTTY STRIP
IS ESSENTIAL.
*
*
BRACKET
GAS CONNECTION
(FRONT)
.625 MIN. (THICKNESS)
8.313
MIN.
**NOTCH DETAIL**
FLOOR AND OUTER SKIN
MUST BE NOTCHED AS
SHOWN BELOW.
.220 MIN. (HEIGHT)
(WIDTH)
DETAIL A
(ONE PER SIDE)
CABINET MOUNTING
L
C
.375
2.062
**.220
MIN.
2.060
8.281
CUTOUT AS VIEWED FROM OUTSIDE
R.V.
*
*CUTOUT FOR FURNACE ACCESS DOOR FRAME
FLOOR
18.218
FURNACE
3.375
C
L
*
BRACKET
ANCHOR BRACKET
TO FLOOR USING
(2) #10 X 3/4
SCREWS PROVIDED
CABINET SUPPORT BRACKET
WELDED TO CABINET
** SEE NOTCH DETAIL A
VENT ASSEMBLY INSTALLATION (SFV MODELS)
SFV-20F, 25F, 30F, 35F, 42F VENT INSTALLATION FOR VERTICAL MOUNT
STANDARD VENT ASSEMBLY FURNISHED WITH FURNACE. SPECIAL EXTENSION TUBES, IF NEEDED, MUST BE
ORDERED SEPARATELY. EXTENSION KITS COME WITH COMPLETE INSTALLATION INSTRUCTIONS.
USE VENT SUPPLIED WITH FURNACE
EXTENSION TUBES KIT NO.
7 1/2" TO 9"
4 1/2" TO 7 1/2"
3" TO 4 1/2"
1 1/2" TO 3"
0" TO 1 1/2"
X" DIMENSION
520769
520551
520768
520767
VENT CAP
EXHAUST & INTAKE
L
C
TRAILER SKIN
SURFACE
MOUNTING
"X"
234
"
DIA.
1.000
TYP.
NEVER INSTALL THE EXHAUST TUBE WITH LESS
THAN 1 1/4" OVERLAP, OR THE INTAKE TUBE
WITH LESS THAN 1/2" OVERLAP.
HOT
SUBURBAN
DO NOT BLOCK OPENINGS
BRACKET REAR VERTICAL
MOUNTING-USE IF POSSIBLE
BRACKET, CABINET MOUNTING
(ONE PER SIDE)
GASKET, BOTTOM DUCT
13
Figure 6
Figure 6A
VENT ASSEMBLY INSTALLATION (SFV MODELS)
STANDARD VENT ASSEMBLY FURNISHED WITH FURNACE. SPECIAL EXTENSION TUBES, IF
NEEDED, MUST BE ORDERED SEPARATELY. EXTENSION KITS COME WITH COMPLETE
INSTALLATION INSTRUCTIONS.
USE VENT SUPPLIED WITH FURNACE
EXTENSION TUBES KIT NO.
7 1/2" TO 9"
4 1/2" TO 7 1/2"
3" TO 4 1/2"
1 1/2" TO 3"
0" TO 1 1/2"
X" DIMENSION
520769
520551
520768
VENT CAP
EXHAUST & INTAKE
L
C
TRAILER SKIN
SFV-20, 25, 30, 35, 42 VENT INSTALLATION FOR VERTICAL MOUNT
SURFACE
MOUNTING
"X"
234"
DIA.
1.000
TYP.
NEVER INSTALL THE EXHAUST TUBE
WITH LESS THAN 1 1/4" OVERLAP, OR
THE INTAKE TUBE WITH LESS THAN
1/2" OVERLAP.
HOT
SUBURBAN
BRACKET REAR VERTICAL
MOUNTING-USE IF POSSIBLE
BRACKET, CABINET MOUNTING
(ONE PER SIDE)
051249
DO NOT BLOCK OPENINGS
GASKET, BOTTOM DUCT
THICKNESS
8.000"
3.375"
2.062"
18.750"
VENT CAP & EXHAUST TUBE
WITH GASKET
DETAIL "A"
(SECURE WITH 6 SCREWS)
REMOVABLE PANEL OF COACH WALL
MUST SEAL WATER TIGHT
WITH GASKET
C
L
L
CFURNACE
CUTOUT
ANCHOR FURNACE TO FLOOR USING THE
(4) #10 X 3/4 SCREWS PROVIDED
(2) 2.250 DIA. HOLES
2.000" MAX. WALL
TUBE, AIR INTAKE
2.060"
SECURE CABINET MOUNTING BRKTS TO CABINET
WITH (2) #8 X 1/2 SCREWS
INSIDE WALL
CAULK BEHIND VENT CAP AS SHOWN TO SEAL BETWEEN
EXHAUST AND INTAKE AND TO PREVENT MOISTURE INSIDE
FURNACE COMPARTMENT. APPLY CAULKING GENEROUSLY
AROUND PERIMETER OF VENT CAP AND ACROSS CENTER
AS SHOWN. CENTER PUTTY STRIP IS ESSENTIAL.
SEE DETAIL "A"
OUTSIDE SKIN (PANEL)
FURNACE CABINET
FRONT
RAIN SHIELD INSTALLATION:
APPLY CAULKING BETWEEN RV SKIN AND BACK OF RAIN SHIELD.
POSITION RAIN SHIELD AS ILLUSTRATED. APPLY A SECOND LAYER
OF CAULKING OVER RAIN SHIELD AND BEHIND VENT CAP AS
ILLUSTRATED. FOLLOW INSTRUCTIONS FOR CAULKING VENT.
TUBE, INTAKE AIR
REMOVABLE PANEL
VENT CAP & EXHAUST TUBE
ELECTRICAL CONNECTION
GAS CONNECTION (REAR) (SFV-35)
FLOOR
OUTSIDE SKIN (PANEL)
3.750
2.060
RIGHT SIDE
OF CUTOUT
GAS CONNECTION (FRONT) (SFV-35F)
CUT OUT AS VIEWED
FROM INSIDE R.V.
14
Figure 8
NT 12/16/20SE
Figure 9
NT 12/16/20S and SE
INSTALLING VENT CAP
TRAILER SKIN
OUTLINE OF FURNACE
VENT CAP &
EXHAUST TUBE
ASSEMBLY
HOLE DIA. IN OUTER SKIN MAY BE 2 1/4"
IF OPENING CUT IN COMBUSTIBLE WALL
IS CUT AS ILLUSTRATED IN FIGURES 3
OR 4. HOLE DIA. MUST BE 2 3/4" IF THE
4 X 7 1/2" OPENING AS SHOWN IN FIGURE
4 IS NOT CUT THROUGH COMBUSTIBLE
WALL.
INTAKE TUBE
CAULK BEHIND VENT CAP AS SHOWN TO SEAL
BETWEEN EXHAUST AND INTAKE AND TO PREVENT
MOISTURE INSIDE FURNACE COMPARTMENT.
APPLY CAULKING GENEROUSLY AROUND
PERIMETER OF VENT CAP AND ACROSS CENTER
AS SHOWN. CENTER PUTTY STRIP IS ESSENTIAL.
IMPORTANT: VENT CAP AND TUBE ASSY. MUST BE
INSTALLED FROM OUTSIDE OF COACH.
VENT ASSEMBLY INSTALLATION (NT SERIES)
VENT TUBE INSTALLATION
VENT TUBE (INTAKE) SEE CHART
MOUNTING SURFACE
VENT TUBE (EXHAUST) 8" X 2" O.D.
2" O.D. X 2 3/4" SPECIAL
2" O.D. X 5" *STANDARD
2' O.D. X 7 1/4" SPECIAL
INTAKE TUBE LENGTH ONLY
STANDARD TUBE FURNISHED WITH FURNACE.
THE SPECIAL TUBES, IF NEEDED, MUST
BE ORDERED.
PART NO.
NEVER INSTALL VENT TUBES
ON INTAKE & 1 1/4" ON EXHAUST
WITH LESS THAN 1/2" OVERLAP
X050708
X050711
X050712
1 1/4" MIN. OVERLAP
"X"
"X" DIMENSION
25 1/2" TO 27 3/4"
21" TO 23 1/4"
23 1/4" TO 25 1/2"
TRAILOR SKIN
2 1/4"
VENT CAP
1/2" MIN. OVERLAP
DIA.
2 1/4"
Y"
7 1/2" DIA.
21" OF INTAKE TUBE
ON EXHAUST
1 3/8"
15
Figure 10
NT 12/16S
Figure 11
NT 20S
VENT ASSEMBLY INSTALLATION (NT SERIES)
VENT TUBE INSTALLATION NT-16S
INTAKE TUBE LENGTH ONLYPART NO. "X" DIMENSION
VENT TUBE ASSY. (INTAKE) SEE CHART
MOUNTING SURFACE
VENT TUBE (EXHAUST) 8" X 2" O.D.
2' O.D. X 3" STANDARD
2' O.D. X 5" SPECIAL
2' O.D. X 7 1/4" SPECIAL
STANDARD TUBE FURNISHED WITH FURNACE. THE
SPECIAL TUBES, IF NEEDED, ARE TO BE ORDERED.
NEVER INSTALL THE EXHAUST TUBE WITH LESS
LESS THAN 1/2" OVERLAP.
THAN 1 1/4" OVERLAP, OR THE INTAKE TUBE WITH
X050708
X050906
X050712
1 1/4" MIN. OVERLAP
3/8"
"X"
27 1/4" TO 29 1/2"
22 3/4" TO 25"
25" TO 27 1/4"
TRAILOR SKIN
2 1/4"
VENT CAP
1/2" MIN. OVERLAP
DIA.
2 1/4"
Y"
7 1/2" DIA.
VENT TUBE INSTALLATION NT-20S
VENT TUBE ASSY. (INTAKE) SEE CHART
MOUNTING SURFACE
VENT TUBE (EXHAUST) 8" X 2" O.D.
2' O.D. X 3" STANDARD
2' O.D. X 5" SPECIAL
2' O.D. X 7 1/4" SPECIAL
INTAKE TUBE LENGTH ONLY
STANDARD TUBE FURNISHED WITH FURNACE.
THE SPECIAL TUBES, IF NEEDED, ARE TO
BE ORDERED.
PART NO.
NEVER INSTALL THE EXHAUST
TUBE WITH LESS THAN 1/2"
OVERLAP, OR THE INTAKE
TUBE WITH LESS THAN 1 1/4"
OVERLAP.
X050708
X050906
X050712
1 1/4" MIN. OVERLAP
1"
"X"
"X" DIMENSION
27 7/8" TO 30 1/8"
23 3/8" TO 25 5/8"
25 5/8" TO 27 7/8"
TRAILOR SKIN
2 1/4"
VENT CAP
1/2" MIN. OVERLAP
DIA.
2 1/4"
Y"
7 1/2" DIA.
16
Figure 12
NT 24/30/34SP • P30S
2 3/4" DIA. TWO HOLES.
INTAKE TUBE
MAXIMUM WALL THICKNESS
FOR THIS UNIT IS 2 1/4"
SEE FIGURE 4 IF MORE THAN
2 1/4" WALL THICKNESS.
ANCHOR VENT ASSEMBLY
WITH THE SCREW PROVIDED.
BE SURE SCREW ENGAGES
FURNACE EXHAUST TUBE
AND IS PULLED SECURE.
CAULK BEHIND VENT CAP AS SHOWN TO
SEAL BETWEEN EXHAUST AND INTAKE
AND TO PREVENT MOISTURE INSIDE
FURNACE COMPARTMENT. APPLY
CAULKING GENEROUSLY AROUND
PERIMETER OF VENT CAP AND ACROSS
CENTER AS SHOWN. CENTER PUTTY
STRIP IS ESSENTIAL.
Figure 13
NT 24/30/34SP • P30
EXTENSION TUBE
KIT NUMBER
MIN./MAX. LENGTH
(Extension Tube Range)
520498
520499
520500
520501
EXTENSION TUBE
KIT NUMBER
MIN./MAX. LENGTH
(Extension Tube Range)
520593
520594
520595
520596
Figure 15
NT 40 • P40
Figure 14
NT 24/30/34SP • P30
*3 1/2" FROM CENTER LINE
OF INTAKE TO CENTER LINE
OF EXHAUST
** 7 1/2" FROM CENTER LINE
OF INTAKE TO FLOOR
GASKET: PEEL OFF PROTECTIVE PAPER
TO EXPOSE THE ADHESIVE SURFACE.
ATTACH GASKET TO WASHER. PLACE
WASHER OVER GAS FITTING. THE
GASKET SHOULD SEAL AGAINST CABINET
WHEN GAS FITTING IS THREADED
INTO POSITION.
MAXIMUM WALL THICKNESS 3"
NOTE: 0" CLEARANCE PERMISSIBLE
AT REAR OF FURNACE FOR A WIDTH
OF 3" MAXIMUM
3 1/2
TWO 2 1/4" DIA HOLES
**
*
7 1/2
2 3/4
13
6 7/32
12 7/16
VENT CAP
EXHAUST
AIR INTAKE
THE SCREW PROVIDED
MUST BE USED ON ALL
INSTALLATIONS
INSIDE WALL
OUTSIDE SKIN
FLOOR
ANCHOR TO FLOOR
WASHER
GAS FITTING
FURNANCE
VENT ASSEMBLY INSTALLATION (NT SERIES)
17
Figure 16
NT40
3 1/2
**
*
7 1/2
2 3/4
13
6 7/32
12 7/16
1/8
SUBURBAN
* 3.50" FROM CENTER LINE OF INTAKE TO
CENTER LINE OF EXHAUST
** 7.50" FROM CENTER LINE OF INTAKE TO FLOOR
HEAT SHIELD COLLAR
EXHAUST
AIR INTAKE
(2) 3.00" DIA. HOLES
INSIDE WALL
OUTSIDE SKIN
FLOOR
FURNACE
POWER SUPPLY
WIRES
THERMOSTAT WIRES
GAS LINE
SHUT-OFF VALVE
GAS LINE
ELBOW
ANCHOR TO FLOOR
MAXIMUM WALL THICKNESS 2.25"
NOTE: 0" CLEARANCE PERMISSIBLE
AT REAR OF FURNACE FOR
A WIDTH OF 2.25" MAXIMUM.
VENT CAP
Figure 17
P40
VENT ASSEMBLY INSTALLATION (NT40 & P40)
3 1/2
**
*
7 1/2
2 3/4
13
6 7/32
12 7/16
FLOOR
1/8
SUBURBAN
(2) 3.00" DIA. HOLES
INSIDE WALL
OUTSIDE SKIN
** 7.50" FROM CENTER LINE OF INTAKE TO FLOOR
* 3.50" FROM CENTER LINE OF INTAKE TO
CENTER LINE OF EXHAUST
HEAT SHIELD COLLAR
EXHAUST VENT CAP
AIR INTAKE
A WIDTH OF 2.25" MAXIMUM.
AT REAR OF FURNACE FOR
NOTE: 0" CLEARANCE PERMISSIBLE
MAXIMUM WALL THICKNESS 2.25"
POWER SUPPLY
WIRES
GAS FITTING
FURNACE
ANCHOR TO FLOOR
18
Figure 18
NT40 • P40
Figure 19
VENT ASSEMBLY INSTALLATION (NT40 & P40)
INTAKE TUBE
2 1/4"
2 3/4"
MAX.
*7"
*
EXHAUST TUBE
7 1/2"
3 1/2"
MAXIMUM WALL THICKNESS FOR THIS
TYPE INSTALLATION IS
2 1/4"
3 1/2"
HEAT SHIELD COLLAR
WARNING:
COLLAR MUST BE ATTACHED
TO ASSURE SAFE
OPERATION. DO NOT
REMOVE COLLAR.
VENT CAP
CENTERLINE OF FURNACE
INSTALLATION
3" DIA. (2) HOLES
(OUTER SKIN)
3 1/2" X 7" CUTOUT
THRU COMBUSTIBLE
CONSTRUCTION
*
CAULK BEHIND VENT CAP AS
SHOWN TO SEAL BETWEEN
EXHAUST AND INTAKE AND TO
PREVENT MOISTURE INSIDE
FURNACE COMPARTMENT. APPLY
CAULKING GENEROUSLY AROUND
PERIMETER OF VENT CAP AND
ACROSS CENTER AS SHOWN.
CENTER PUTTY STRIP IS
ESSENTIAL.
VENT ASSEMBLY INSTALLATION (DD SERIES)
19
RETURN AIR
furnace. Note: Refer to the installation manual for the minimum return air area for your specic furnace model.
0" TO SPACER
0" TO SPACER
OPENING FOR RETURN AIR
SPACER BUMPS
OPENING FOR
RETURN AIR
MAINTAIN A 1/4" INCH CLEARANCE
WHERE DUCTS PASS THROUGH
A CABINET WALL. UL LISTED DUCT
MATERIALS CAN BE 0" CLEARANCE.
THE TOTAL, FREE, UNOBSTRUCTED RETURN AIR OPENING
TO THE FURNACE MUST NOT BE LESS THAN THE MINIMUM
SPECIFIED.
SPACER BUMPS
FURNACE
Figure 20
SF 20F/25F/35F/42F
DUCTING
NOTE: (Refer to the
installation manual for the minimum ducted square inches area for
each model.)
NOTE: Ducts terminating in a dead air space (like holding tank
compartments or cargo areas (Toy Boxes) with no means for return
air recirculation should not be counted in the required duct area.
Also, ducts 2” in diameter or smaller should not be counted in the
required duct area.
furnace to cycle on limit.
Figure 21
20
RETURN AIR & DUCTING INSTALLATION REQUIREMENTS
NOTE:
MODELS CLR
FRONT
CLR
TOP
CLR
BTM
CLR
BACK
CLR
LEFT
CLR
RIGHT
DUCTS
REQ’D
BTM DUCT
SQ INCH
TOP DUCT
SQ INCH
L & R SIDE DUCT
SQ INCH
RETURN AIR
SQ INCH
DD-17DSI N/A N/A N/A N/A N/A
NT 12S N/A N/A
NT 16S N/A N/A
NT 20S N/A N/A
NT 12SE N/A N/A N/A N/A N/A
NT 16SE N/A N/A N/A N/A N/A
NT 20SE N/A N/A N/A N/A N/A
NT 24SP N/A
NT 30SP N/A
NT 34SP N/A
NT 40 N/A
P 30 N/A
P 40 N/A
This manual suits for next models
4
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