Heatilator NNXT4236IF Installation Manual
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INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
NOTICE: DO NOT discard this manual!
Model(s):
This appliance may be installed as an OEM
installation in manufactured home (USA
only) or mobile home and must be installed
in accordance with the manufacturer's
instructions and the Manufactured Home
Construction and Safety Standard, Title 24
CFR, Part 3280 in the United States, or the
Standard for Installation in Mobile Homes,
CAN/CSA Z240 MH Series, in Canada.
This appliance is only for use with the type(s)
of gas indicated on the rating plate. This
appliance is not convertible for use with other
gases, unless a certifi ed kit is used.
Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15
Installation Manual
Installation and Appliance Setup
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
• DO NOT store or use gasoline or other fl am-
mable vapors and liquids in the vicinity of this
or any other appliance.
• 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 building.
- Leave the building immediately.
- Immediately call your gas supplier from
a neighbor's phone. Follow the gas sup-
plier's instructions.
- If you cannot reach your gas supplier, call
the fi re department.
• Installation and service must be performed
by a qualifi ed installer, service agency, or the
gas supplier.
DANGER
DO NOT TOUCH GLASS
NEVER ALLOW CHILDREN
A barrier designed to reduce the risk of
burns from the hot viewing glass is provided
with this appliance and shall be installed for
the protection of children and other at-risk
individuals.
In the Commonwealth of Massachusetts installation must be
performed by a licensed plumber or gas fi tter.
See Table of Contents for location of additional Commonwealth
of Massachusetts requirements.
HOT GLASS WILL
CAUSE BURNS.
UNTIL COOLED.
TO TOUCH GLASS.
1

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Summary of Contents for Heatilator NNXT4236IF

  • Page 1 In the Commonwealth of Massachusetts installation must be performed by a licensed plumber or gas fi tter. See Table of Contents for location of additional Commonwealth of Massachusetts requirements. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 2: Table Of Contents

    D. Disassemble Vent Sections ..... . . 31  = Contains updated information. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 3: Installation Standard Work Checklist

    _____________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ Comments Communicated to party responsible ____________________ by ______________________on ___________ (Builder / Gen. Contractor/) (Installer) (Date) = Contains updated information. Part #4055-982 5/14 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 4: Product Specifi C And Important Safety Information

    (0-2000 FT) 30,000 17,000 #52 DMS (Propane) NNXT3933IF (0-2000 FT) 29,000 16,000 #39 DMS (NG) NNXT3933ILF (0-2000 FT) 27,500 15,750 1.55 mm (Propane) Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 5: Requirements For The Commonwealth Of Massachusetts

    VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OB- of the installation. STRUCTIONS”. See Gas Connection section for additional Common- wealth of Massachusetts requirements. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 6: Getting Started

    Non-corrosive leak check solution 1/2 - 3/4 in. length, #6 or #8 Self-drilling screws Caulking material (300ºF minimum continuous exposure rating) One 1/4 in. female connection (for fan). Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 7: Framing And Clearances

    1-1/2 in. 8 in. 1-3/4 in. (76 mm) (38 mm) (44 mm) (203 mm) 15-3/4 in. (400 mm) 23-1/2 in. (597 mm) Figure 3.1 Appliance Dimensions Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 8: Clearances To Combustibles

    1689 1915 37-5/8 19-5/8 43-3/8 53-1/4 53-1/4 61-3/8 66-1/2 75-3/8 10-5/8 NNXT4236 1067 1102 1194 1353 1092 1330 1559 1689 1915 Figure 3.2 Appliance Locations  Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 9: Constructing The Appliance Chase

    (or an equivalent method may be making contact with fi replace or chimney. used) to achieve maximum air tightness. • Failure to maintain airspace may cause overheating and a fi re. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 10 Rough Opening Model (Width) (Height) (Depth) (DVP Pipe) (SLP Pipe) NNXT3933 34 7/8 19 5/8 NNXT4236 1067 34 7/8 19 5/8 Figure 3.3 Clearances to Combustibles Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 11: Termination Location And Vent Information

    Over 18/12 to 20/12 ..........7.5 Over 20/12 to 21/12 ..........8.0 * 3 foot minimum in snow regions Figure 4.1 Minimum Height From Roof to Lowest Discharge Opening Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 12: Chimney Diagram

    • Vinyl protection kits are suggested for use with vinyl siding. Figure 4.3 Minimum Clearances for Termination Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 13: Approved Pipe

    Horizontal pipe installed level with no rise. SLP6A 2 - 6 51 - 152 SLP Pipe SLP12A 2 - 12 51 - 305 (see chart) Figure 4.5 Pipe Effective Length Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 14: Vent Diagrams

    0.61 - 5.18 7.62 17 5.18 7.01 17 5.18 You may install the elbow directly on top of the appliance (DVP only). Figure 4.7 Figure 4.6 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 15 Two Elbows 0.15 1.83 0.30 3.35 3.35 0.46 5.18 5.18 0.61 5.18 5.18 7.62 5.18 5.18 7.01 5.18 5.18 Installed Vertically Installed Horizontally Figure 4.9 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 16 Remove the refractory retainer from one of the side refractories. Remove lower refractory retainer 12 ft (3.66 m) min. 60 ft (18.29 m) max. Figure 4.11a Remove Refractory Retainer Figure 4.11 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 17 Figure 4.11c Remove Top Refractory Figure 4.11e 31-60 ft Vertical Run • Reinstall Refractory: Replace top refractory. Lift top refractory and slide side refractory back into position. Replace bottom retainer. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 18 Maximum horizontal run is 100% of vertical, but cannot exceed 17 ft (5.18 m) 12 ft (3.66 m) min. 60 ft (18.29 m) max. Figure 4.12 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 19 12 ft (3.66 m) min. 60 ft (18.29 m) max. Maximum horizontal run is 100% of vertical, but cannot exceed 17 ft (5.18 m) Figure 4.13 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 20 3. Rear Vent - Horizontal Termination No Elbow 18 in. (457 mm) max. Figure 4.14 One 45° Elbow 18 in. (457 mm) max. Figure 4.15 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 21 Three Elbows 0.30 0.91 0.61 0.30 0.91 1.22 0.61 1.83 1.83 0.91 2.74 2.44 1.22 3.66 2.44 1.52 4.57 2.44 1.83 5.49 Installed Horizontally Figure 4.17 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 22 6 ft (1.83 m) max. 60 ft (18.29 m) max. Maximum horizontal run is 100% of vertical, but cannot exceed 18 ft (5.49 m) Figure 4.19 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 23 12 ft (3.66 m) min. 60 ft (18.29 m) max. Maximum horizontal run is 100% of vertical, but can- not exceed 18 ft (5.49 m) Figure 4.20 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 24: Vent Clearances And Framing

    * Shows center of vent framing hole for top or rear venting. The center of the hole is one (1) in. (25.4 mm) above the center of the horizontal vent pipe. Figure 5.2 Wall Penetration Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 25: Ceiling Firestop/Floor Penetration Framing

    INSTALL ATTIC INSULATION SHIELDS BEFORE OR AFTER INSTALLATION OF VENT SYSTEM CEILING FIRESTOP CEILING FIRESTOP INSTALLED BELOW CEILING INSTALLED ABOVE CEILING Figure 5.4 Installing the Attic Shield Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 26: Appliance Preparation

    Snap the fi rst vent section into place. Figure 6.2 • Cut the metal retaining band and fold the sides out. Figure 6.6 Proceed to Section 6.C. Figure 6.3 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 27: Rear Vent

    Figure 6.7 Figure 6.10 • Fold the center parts of the retaining band out and use to remove the vent cap. Figure 6.8 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 28: Securing And Leveling The Appliance

    • Secure the appliance to the fl oor by inserting two screws through the pilot holes at the bottom of the appliance. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 29: Venting And Chimneys

    Use screws no longer than 1/2 INCORRECT in. (13 mm). If predrilling screw holes, DO NOT penetrate inner pipe. Figure 7.4 Seams Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 30: Assemble Slip Sections

    Figure 7.5 Adding Venting Components • All unit collar, pipe, slip section, elbow and cap outer fl ues shall be sealed. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 31: Secure The Vent Sections

    Figure 7.10 Rotate Seams for Disassembly connection point to appliance. 120º Figure 7.11 Align and Disassemble Vent Sections Figure 7.8 Securing Vertical Pipe Sections 120º Figure 7.9 Securing Horizontal Pipe Sections Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 32: Vertical Termination Requirements

    • Caulk the perimeter of the fl ashing where it contacts the roof surface. See Figure 7.13. • Caulk the overlap seam of any exposed pipe sections that are located above the roof line. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 33: Horizontal Termination Requirements

    Figure 7.15 Figure 7.15 Important Notice: Heat shields may not be fi eld constructed. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 34 SLP-TRAP2 can adjust 4 in. (5 1/4 to 9 1/4)) DVP-HPC1 can adjust 2 1/8 in. (4 1/4 to 6 3/8) DVP-HPC2 can adjust 4 1/8 in. (6 3/8 to 10 1/2) Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 35: Hht Shrouds

    483 x 483 Min. Top Dim. Min. Top Dims. 16 x 16 406 x 406 Min. Base Dim. Min. Base Dim. Figure 7.17 Open Top Shroud Dimensions Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 36 508 x 508 Min. Height Minimum Height Minimum Opening Min. Opening Width Height Min. Opening Width Minimum Base Dimension Min. Opening Height Figure 7.19 Roofed Style Shroud Dimensions Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 37: Electrical Information

    Cover Plate outside firebox to permanent electrical service. Copper ground attached GRN wire to GRN screw with inside box GRN wire Figure 8.1 Junction Box Detail Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 38 Figure 8.3 Junction Box Wired to Wall Switch or BC10 (1/4 in. male) as shown. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 39: Gas Information

    4500 feet (1370 m). • If substituting for these components, please consult local codes for compliance. Check with your local gas utility to determine proper orifi ce size. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 40: Air Shutter Setting

    • Turn the thumbscrew to open and close. NOTICE: If sooting occurs, provide more air by opening the air shutter. Close Open Figure 9.1 Air Shutter Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 41: Finishing

    0 in. 0 in. 0 in. High Temperature Sealant (300° F/149° C min.) Top and Side Seal Joint Figure 10.1 Non-combustible Facing Diagram Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 42: Mantel And Wall Projections

    3-1/2 in. (89 mm) min. from fireplace opening to perpendicular wall Figure 10.3 Mantel Leg or Wall Projections (Acceptable on both sides of opening) Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 43: Appliance Setup

    The top log pack is shipped inside the fi rebox. When you remove the glass, the log pack will come out also. Figure 11.3 Remove Screen Package Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 44: Remove Packing Material

    Vermiculite Figure 11.6 Placement of Rockwool, Lava Rock and Vermiculite Figure 11.9 Install Left Top Log I. Place the Vermiculite Sprinkle on top of lava rock. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 45: Replacing Fixed Glass Assembly

    Cut the tape on top of the screen protector. See Figure 11.12. • Open the screen protector and remove the screen. See Figure 11.13. Figure 11.14 Removing Hood Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 46: Install Hood

    Make sure all wires are under the top of the control heat shield and that there are no wires pinched between legs and the bottom pan. Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 47 Press in on the bottom of the screen until the magnetic touch latches close. See Figure 11.20. Figure 11.19 Rotate the Screen Down Figure 11.20 Press on Bottom of Screen Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 48: Reference Materials

    (356 mm) 5 in. 12 in. (127 mm) (305 mm) 6 in. (152 mm) DVP-HVS (Vent Support) DVP-WS (Wall Shield Firestop) Figure 12.1 DVP vent components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 49 117 mm Length DVP-TRAP 5-3/8 in. 9-3/8 in. Trap2 Horizontal Termination Cap 137 mm 238 mm DVP-TRAP2 DVP-TRAP1 DVP-TRAPK2 DVP-TRAPK1 DVP-HPC1 DVP-HPC2 Figure 12.2 DVP vent components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 50 9-1/2 in. (352 mm) (241 mm) 26 in. 660 mm 14 in. (356 mm) DVP-HSM-B DRC-RADIUS Extended Heat Shield Cap Shield Figure 12.3 DVP vent components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 51 High Performance Cap 3/8 in. (10 mm) 1 in. (25 mm) 7-3/4 to 10-3/8 in. (197 to 264 mm) DVP-FBHT FireBrickTermination Cap Figure 12.4 DVP vent components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 52 5-3/4 to 8-3/8 in. 140 mm 213 mm 146 to 213 mm 3° 87° 10-1/2 in. 267 mm 10-7/8 in. 276 mm DVP-HRC-ZC-SS Figure 12.5 Vent Components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 53 1-1/2 in. 12 in. 5-1/2 in. 220 mm 38 mm 305 mm 146 mm SLP-WS SLP-FS Wall Shield Firestop Ceiling Firestop Figure 12.6 SLP Series Vent Components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 54 367 mm 26 in. 660 mm 2-5/16 in. 14-7/16 in. 59 mm 367 mm DVP-HSM-B SLP-WT-BK Extended Heat Shield Wall Thimble-Black Figure 12.7 SLP Series Vent Components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 55 DVP-FBHT SLK-SNKD Horizontal Snorkel Termination Cap Termination Cap 12 in. 305 mm 12-1/2 in. 318 mm SLP-TVHW Vertical Termination Cap Figure 12.8 SLP Series Vent Components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 56 PVI-WH100 separately. Use if the PVLP-SLP is installed in a high traffi c area. PVLP-HS PVLP-BEK Heat Shield Brick Kit  Figure 12.9 PVLP-SLP Vent Components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 57 LDS-BV Decorative Shroud Catalog # 12.5 15.5 LDS-BV See your Heatilator dealer for a complete listing of optional components. Figure 12.10 Coaxial to Colinear Vent Components Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...
  • Page 58: Accessories

    Please contact your Heatilator dealer with any questions or concerns. For the location of your nearest Heatilator dealer, please visit www.heatilator.com. Printed in U.S.A. - Copyright 2015 Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15...

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