Vermont Castings MONTPELIER II MONTP-II-BM, Installation Manual

23

07/20

7101-802G

Spark Arestor Cap 

Roof Flashing 

Storm Colla

r 

Joist Shield/Firestop 

Double Wall 

Connector Pipe  

Figure 23.1  

NOTICE:

 Top sections of chimney must be removable 

to allow maximum clearance of 13.5 feet (411cm) from 

ground level for transportation purposes.

NOTICE:

 Offsets from the vertical, not exceeding 45°, are 

allowed per 

Section 905(a) of the Uniform Mechanical 

Code (UMC)

.  Offsets  greater  than  45°  are  considered 

horizontal and are also allowed, providing the horizontal 

run does not exceed 75% of the vertical height of the 

vent. Construction, clearance and termination must be 

in compliance with the 

UMC Table 9C

. This installation 

must also comply with 

NFPA 211

.

You  must  use  a  Vermont  Castings  Outside  Air  Kit 

Part number:

OAK-ACC

1.  An outside air inlet must be provided for combustion and 

must remain clear of leaves, debris, ice and/or snow. It 

must be unrestricted while unit is in use to prevent room 

air starvation which can cause smoke spillage and an 

inability to maintain a fire. Smoke spillage can also set 

off smoke alarms.

2.  Unit must be secured to the mobile home structure at 

two attachment points. Remove bolts from each side of 

insert and use plumbers tape to secure to structure (a 

washer may be required). Re-install bolts.

3.  Unit must be grounded with #8 solid copper grounding 

wire or equivalent and terminated at each end with 

N.E.C. approved grounding device.

4.  The  factory-built  fireplace  must  meet 

(UM)84-HUD

requirements for outside combustion air supply to 

the  fireplace  fire  chamber  and  the  chimney  must  be 

listed to 

UL103 HT

 or a listed 

UL-1777

 full length six 

inch (152mm) diameter liner must be used. It must be 

equipped with a spark arrestor cap and the outside air 

must be installed on the insert. 

5.  Refer to 

pages  8-10

 of this manual for clearance to 

combustibles  and  floor  protections  requirements.    All 

clearances must be followed precisely.

6.  Use  silicone  to  create  an  effective  vapor  barrier  at 

the location were the chimney or other component 

penetrates to the exterior of the structure.

7. Follow the chimney and chimney connector 

manufacturer’s  instructions  when  installing  the  flue 

system for use in a mobile home.

8.  Burn  wood  only.  Other  types  of  fuels  may  generate 

poisonous gases (e.g., carbon monoxide).

9.  If unit burns poorly while an exhaust blower is on in 

home, (i.e., range hood), increase combustion air.

10. 

Installation shall be in accordance with the 

Manufacturers Home & Safety Standard (HUD) CFR 

3280, Part 24

.

6 

6 

Mobile Home Installation, Approved for USA Installation only! 

Fire Risk. Asphyxiation Risk.

Do not draw outside combustion air from:

•  Wall, floor or ceiling cavity

•  Enclosed space such as an attic or garage

• Close proximity to exhaust vents 

or chimneys

Fumes or odor may result

WARNING

!

THE  STRUCTURAL  INTEGRITY  OF  THE  MOBILE 

HOME  FLOOR,  WALL  AND  CEILING/ROOF  MUST 

BE MAINTAINED

Do NOT cut through:

•  Floor joist, wall, studs or ceiling trusses.

• 

Any  supporting  material  that  would  affect  the 

structural integrity.

CAUTION

!

Asphyxiation Risk.

NEVER INSTALL IN A SLEEPING ROOM.

Consumes oxygen in the room.

WARNING

!