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"
