Kuma Stoves K-250 Cambridge LE, K-250 Wood Classic LE, K-250 Ashwood LE, K-180 Alpine LE Installation And Operating Instructions Manual

Model # K-250:

Ashwood LE

Wood Classic LE

Cambridge LE

Tested and listed by OMNI-Test
Laboratories Inc.
Portland OR, USA

Emissions tested to: ASTM 3053-2017
Report# 0123WM012E

Safety tested to UL 1482-2011 (R2015)
Report # 0123WS012S

INSTALLATION AND OPERATING INSTRUCTIONS

SAVE THESE INSTRUCTIONS

K-250 | 190808

This manual describes the installation and operation of the Kuma Model K-250 Catalytic equipped wood

heater. This heater meets the 2020 U.S. Environmental Protection Agency’s cord wood emission

limits for wood heaters sold after May 15, 2020. Under specific test conditions (ASTM 3053-2017) this

heater has been shown to deliver heat at rates ranging from 11,196 to 30,308 Btu/hr. and an efficiency

of 79.4% (High Heating Value). Please visit https://www.kumastoves.com/content/page/EPA for a

detailed explanation of stove efficiencies. Particulate emissions are 1.13 grams per hour and average

CO emissions are 0.1813 grams per minute.

Please read the safety precautions and the entire installation and operation

instructions carefully. Failure to properly install and maintain your wood stove

can result in an unsafe condition.

TABLE OF CONTENTS

SECTION 1 - SAFETY PRECAUTIONS

SECTION 2 - SPECIFCATIONS

SECTION 3 - INSTALLATION INSTRUCTIONS

SECTION 4 - OPERATING INSTRUCTIONS

SECTION 5 - CATALYST INFORMATION

SECTION 6 - MAINTENANCE

SECTION 7 - TROUBLESHOOTING

SECTION 8 - WARRANTY

K-250 | 190808

SECTION 1 - WARNINGS

If this stove is not properly install

ed, a house fire can occur. For your protection, follow the installation

instructions provided. We recommend contacting local building or fire officials regarding restrictions and
installation inspection requirements in your area. We also recommend that your Kuma stove be installed

by a properly trained and licensed installer, preferably an NFI (National Fireplace Institute) expert.

DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVICING ANOTHER APPLIANCE.
Do not burn garbage or flammable fluids such as gasoline, naptha or engine oil. Do not use charcoal

lighter fluid or similar liquids to start or “freshen up” a fire in this heater. Keep all such fluids well away from
the heater while in use. Storing these fluids near a stove could cause a fire.

DO NOT CONNECT TO ANY AIR DISTRIBUTION OR DUCT SYSTEM.
DO NOT OVERFIRE. If any part of the stove or chimney glows, the stove is in an over fire condition. If this

happens, shut the air control off immediately. Over firing can cause damage.

WARNING: DO NOT INSTALL IN A SLEEPING ROOM.
An improperly drafting stove can cause smoke and carbon monoxide to enter the home. Smoke detectors

and carbon monoxide monitors are recommended to be installed in the same room as this heater.

CAUTION: THE STRUCTURAL INTEGRITY OF THE FLOOR, WALLS, ROOF/CEILING, AND VAPOR

BARRIERS MUST BE MAINTAINED.

DO NOT USE SINGLE WALL PIPE OR CONNECTOR PIPE FOR ANY CHIMNEY APPLICATION, EXTERIOR

OR THROUGH THE WALL OR CEILING. Single wall pipe may only be used as a connection between the
stove and an approved masonry or stainless steel chimney. Single wall pipe may not be used as a
connector in mobile homes.

When installing into an existing masonry or metal chimney, examine the chimney system carefully. If you

have any questions, seek professional advice. We recommend having existing chimneys cleaned and
inspected by a qualified professional prior to the installation of your new stove.

NOTE ALL MINIMUM CLEARANCE REQUIREMENTS TO COMBUSTIBLES. Installation must comply with

minimum clearances as listed in this manual. Clearances may only be reduced by means approved by the

regulatory authority.

Do not operate this stove with the door in an open position, except for cracking open during start-up.

Continued operation with the door open can cause overheating of the unit, and expose embers to nearby
combustibles.

Do not operate with broken glass. Do not abuse glass such as striking or slamming the door.
This stove must be connected to a minimum 6” diameter listed chimney that complies with U.L. type 103HT

factory built chimney or a code approved masonry chimney. When installing into masonry chimneys, a U.L.
1777 approved liner must be installed.

When connecting single wall or double wall connector pipe to the stove and chimney, use 3 screws per pipe

joint including 3 screws securing the pipe to the stove. Depending on the type of double wall pipe you are
using, it may also be necessary to fasten it at the chimney.

Use only approved components for Chimney and Connector. Field fabricated or “makeshift” components are

not allowed and can cause a fire.

DO NOT USE THIS STOVE WITHOUT THE BAFFLE BOARDS AND CERAMIC INSULATION PACKAGED

WITH YOUR STOVE.

When connecting this stove to a masonry chimney, make sure you observe all applicable clearances including

walls, ceilings and other combustible material. A masonry chimney must be minimum 6” diameter and
constructed with a liner according to NFPA code 211. If you have any questions about the condition or the
code compliance of your masonry chimney, please speak with a qualified professional.

HOT WHILE IN OPERATION. KEEP CHILDREN, CLOTHING AND FURNITURE AWAY. CONTACT MAY

CAUSE SKIN BURNS.

WARNING

SECTION 2 - SPECIFICATIONS

CERTIFICATION TAG

WOOD CLASSIC DIMENSIONAL DRAWINGS

All dimensions are in inches.

ASHWOOD DIMENSIONAL DRAWINGS

All dimensions are in inches.

CAMBRIDGE DIMENSIONAL DRAWINGS

All dimensions are in inches.

MINIMUM CLEARANCE REQUIREMENTS

18” or follow pipe

manufacturer’s

Pipe clearances (A,C,E) are measured to the outside diameter of the pipe. Pipe diameter will vary by brand so
when planning your installation, make sure the stove clearances (B,D,F) AND the pipe clearances (A,C,E) are
equal to or greater than the minimum clearances. Always follow local building codes. These clearances may
be reduced only by using approved methods found in NFPA 211.

Minimum

Clearance with

single-wall pipe

A 15” 10”

B 11.5” 7”

C 24.5” 23.5”

D 14.5” 14”

E 15” 14.5”

F 5” 5”

L 18.5” 18.5”

N 84” 84”

Minimum

clearance with

double-wall pipe

Alcove Dimensions:

(must use double-wall pipe)

instructions

Minimum

56” wide

Minimum

84” tall

SECTION 3 –

It is highly recommended that this stove is installed by a qualified professional certified by the

National Fireplace Institute.

The structural integrity of the floor, walls and ceiling/roof must be maintained. Use additional

bracing if required. Never cut a load bearing wall or engineered truss.

NEVER INSTALL A STOVE IN A SLEEPING ROOM

This stove is heavy: Get help from another person and use proper lifting techniques

The safety standards referenced in this manual are easy to find online. Products that meet these standards
will be readily available from your dealer. Refer to this glossary of terms for a better understanding of these
standards:

Standard Description

(F S)

INSTALLATION INSTRUCTIONS

UL 103

UL 103HT

UL 1777

NFPA 211

Covers the safety requirements for factory-built (metal)chimneys that
vent wood stoves. Chimney manufacturers can either comply with a
1700° or a 2100° flue-gas temperature test.

Chimney manufacturers that choose to comply with the 2100° flue-gas
temperature test will receive the designation of a 103HT chimney
system. HT stands for High Temperature and virtually all modern
wood stoves will require this type of chimney.

Covers the safety requirements for chimney liners that are installed
into masonry fireplaces. Your chimney liner will meet the safety
requirements of UL 1777 only if the installation instructions for the liner
are followed.

A publication put out by the National Fire Protection Association that
details the proper installation of wood stoves, chimneys, fireplaces,
and venting systems.