Wood Stone MT. CHUCKANUT User manual

MOUNTAIN SERIES
Stone Hearth Oven
Radiant Flame, Gas-Fired Models
MT. CHUCKANUT WS-MS-4-RFG
MT. ADAMS WS-MS-5-RFG
MT. BAKER WS-MS-6-RFG
MT. RAINIER WS-MS-7-RFG
Installation and
Operation Manual
Toll Free 800.988.8103
Tel [phone]
Fax [phone]
www.woodstone-corp.com
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
DOC NO M0031.07 REVISED May 2017

PG 2 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
TABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTS. . . . . . . . . . . . . . . . . . . . . . . 2
MOUNTAIN SERIES. . . . . . . . . . . . . . . . . . . . . . . . . 3
CAUTIONS & WARNINGS . . . . . . . . . . . . . . . . . . . . 4
UNLOADING & MOVING . . . . . . . . . . . . . . . . . . . . . 6
INSTALLATION CLEARANCES . . . . . . . . . . . . . . . . . 7
FACADE DETAILS . . . . . . . . . . . . . . . . . . . . . . . . . . 9
OUTDOOR INSTALLATION . . . . . . . . . . . . . . . . . . . 10
GAS SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL SPECIFICATIONS. . . . . . . . . . . . . . . . 13
VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
FLUE ADAPTER . . . . . . . . . . . . . . . . . . . . . . . . . . 16
FIRE SUPPRESSION . . . . . . . . . . . . . . . . . . . . . . . 17
VENTING DO'S & DON'TS. . . . . . . . . . . . . . . . . . . 18
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
MANTLE MOUNTING . . . . . . . . . . . . . . . . . . . . . . 27
FRONT PANEL ASSEMBLY. . . . . . . . . . . . . . . . . . . 28
EXTENSION PANEL ASSEMBLY . . . . . . . . . . . . . . . 29
STUCCO APPLICATION . . . . . . . . . . . . . . . . . . . . . 31
CONTROLLER . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . 33
DAILY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . 34
FLAME HEIGHT CONTROL . . . . . . . . . . . . . . . . . . 35
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . 36
PERIODIC THERMAL CLEANING . . . . . . . . . . . . . . 37
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . 38
OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . 39
120 VAC ELECTRICAL DIAGRAM. . . . . . . . . . . . . . 40
240 VAC ELECTRICAL DIAGRAM. . . . . . . . . . . . . . 42
INTERLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . 44
LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . 45

PG 3 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
MOUNTAIN SERIES
INSTALLATION AND OPERATION MANUAL
THE WOOD STONE MOUNTAIN SERIES
STONE HEARTH COOKING EQUIPMENT
WS-MS-(4, 5, 6, 7)-RFG MODELS
GAS-FIRED OVEN
ADDITIONAL COPIES AVAILABLE UPON REQUEST

PG 4 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
CAUTIONS & WARNINGS
WOOD STONE MOUNTAIN SERIES GAS-FIRED OVEN OPERATING INSTRUCTIONS
FOR YOUR SAFETY: Consult your local gas supplier for a statement outlining a procedure to be followed
in the event you smell gas. Post the statement in a prominent location.
READ ALL INSTRUCTIONS BEFORE INSTALLING AND USING THIS APPLIANCE
Please read this entire manual before you install the oven. Failure to follow instructions may result in
property damage, bodily injury or even death. Contact your local building or fire officials about restrictions
and installation inspection in your area.
RETAIN THIS MANUAL FOR FUTURE REFERENCE
Additional copies of this manual at woodstone-corp.com.
For prompt responses to service/maintenance questions, call us at @ 1-800-988-8103.
WHEN THE OVEN IS NOT PROPERLY INSTALLED, A FIRE MAY RESULT.
TO REDUCE RISK OF FIRE, FOLLOW THE INSTALLATION INSTRUCTION.
FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors or liquids in the vicinity of
this or any other appliance. Also, always keep the area under and around this appliance free and clear of
any and all combustible materials.
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause property
damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before
installing or servicing this equipment.
IMPORTANT: It is recommended that this oven be installed, maintained and serviced by authorized
professionals.

PG 5 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
CAUTIONS & WARNINGS
A MAJOR CAUSE OF OVEN RELATED FIRES IS A
FAILURE TO MAINTAIN REQUIRED CLEARANCES
TO COMBUSTIBLE MATERIAL. IT IS OF UTMOST
IMPORTANCE THAT THIS OVEN BE INSTALLED ONLY
IN ACCORDANCE WITH THESE INSTRUCTIONS.
CAUTION: DISCONNECT POWER TO THE OVEN BEFORE SERVICING OR CLEANING.
Wood Stone’s gas-fired ovens have been tested and approved by Intertek Testing Services,
and are ETL Listed to ANSI Z83.11:2016 Ed. 4, CSA 1.8:2016 Ed. 4 and to NSF/ANSI Standard 4 - 2009.
WARNING: This product must be installed by a licensed plumber or gas fitter when installed within the
Commonwealth of Massachusetts.
SAVE THE INSTRUCTIONS
IN THE EVENT OF A POWER FAILURE, NO ATTEMPT SHOULD BE MADE TO OPERATE THE OVEN.
ANSI Z83.11:2016 Ed.4
CSA 1.8:2016 Ed.4
ANSI/NSF STD 4

PG 6 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
UNLOADING & MOVING
2. USING A PALLET JACK
Once the oven has been removed from the delivery vehicle, it can easily be
moved on flat surfaces using a Pallet Jack. To lift the oven with a Pallet Jack,
remove the front and rear angle iron stabilizers from the base of the oven stand
and place a stout 4x4 post through the Fork Pocket as shown in figure b.
THE OVEN IS VERY TOP-HEAVY. MOVING THE OVEN UP OR DOWN A RAMP
OR INCLINE ON A PALLET JACK IS NOT SAFE!
DELIVERY NOTE: The customer will receive an Oven Shipping Notification when the oven leaves the Wood Stone factory. This
will include a PRO# and a trucking company contact number. Wood Stone recommends that you confirm the delivery date/time
with the trucking company before committing to heavy equipment and/or labor. Our goal is a smooth and safe delivery.
4x4 post
1. USING A FORKLIFT
Be sure to use a Forklift rated, and Forks the minimum length,
as shown in the table below. If necessary, Fork Extensions must
be used so the Forks extend through the Fork Lift Pockets to the
opposite side of the stand. Lift from either side as shown in figure
a. Do not lift from the front or back. The oven is very top heavy, so
spread the Forks as far apart as possible.
Model Oven
Approximate
shipping
weight
Minimum
fork length
required
Required
forklift
capacity
WS-MS-4 Mt. Chuckanut 2,400 lbs. 4' 5,000 lbs.
WS-MS-5 Mt. Adams 3,600 lbs. 5' 6,000 lbs.
WS-MS-6 Mt. Baker 4,600 lbs. 6' 6,000 lbs.
WS-MS-7 Mt. Rainier 6,000 lbs. 7' 9,000 lbs.
3. USING A CRANE
The oven arrives with four lifting eyes attached. When craning a Wood Stone
oven, use a spreader bar with a two-legged sling rigged on each end. The
spreader bar should be of a sufficient length to keep the sling from contacting
the oven. See figure c.
DO NOT TURN THE OVEN ON ITS SIDE!
Contact Wood Stone if the oven must be turned on its side for specific instructions.
Moving a Wood Stone oven can present challenges to even the most experienced
riggers. Take your time, use your head, secure the proper equipment and make
safety your first priority. Please don’t hesitate to call the factory for technical
support.
LIFTING THE OVEN
NOTE: Once Pickeyes are no longer needed, remove the Pickeyes one at a
time AND BE SURE TO REPLACE THE BOLTS THAT ATTACH THE OVEN
TO THE STAND.
fig. a
fig. b
fig. c

PG 7 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
INSTALLATION CLEARANCES
CLEARANCES
1. The Wood Stone gas-fired oven must have a minimum 1" clearance to combustibles from all sides, and 14" clearance
to combustibles from the top (see INSTALLATION CLEARANCES section on next page). If building a facade that will contact
the oven, use completely non-combustible materials*. Please note that standard Drywall (or Sheetrock) is considered a
combustible.
2. Any facade materials 6" to either side of the oven doorway and above must be constructed of non-combustible building
materials.
3. Install this oven only on a non-combustible floor surface. (Cet appareil doit être installé sur une surface de plancher non-
combustible.) The non-combustible floor surface should extend 36" out in front of the oven, and extend 30" to either side of
the oven doorway.
*When non-combustible building materials contact the body of the appliance, the clearances to combustibles are transferred to
those non-combustibles.
NOTICE: For stucco-ready appliances (model numbers ending in “-S”), the same clearances as described above apply. Non-
combustible stucco mix must be used and applied to a minimum thickness of 1".
IF THIS OVEN IS NOT PROPERLY INSTALLED A FIRE MAY RESULT. TO REDUCE THE RISK OF FIRE, FOLLOW THESE
INSTALLATION INSTRUCTIONS. A MAJOR CAUSE OF OVEN RELATED FIRES IS FAILURE TO MAINTAIN REQUIRED
CLEARANCES (AIR SPACES) TO COMBUSTIBLE MATERIALS. IT IS OF UTMOST IMPORTANCE THAT THIS OVEN BE
INSTALLED ONLY IN ACCORDANCE WITH THESE INSTRUCTIONS.
WARNING: DO NOT PACK REQUIRED AIR SPACES WITH INSULATION OR OTHER MATERIAL.
PLEASE READ THIS ENTIRE MANUAL BEFORE YOU INSTALL THE OVEN. FAILURE TO FOLLOW INSTRUCTIONS
MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH. CONTACT YOUR LOCAL BUILDING OR
FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION INSPECTION IN YOUR AREA.
!WARNING: Installation and servicing of this product could expose you to glasswool/ceramic
fibers as well as calcium silicate dust. ALWAYS WEAR RESPIRATORY AND EYE PROTECTION
WHEN INSTALLING OR SERVICING THIS APPLIANCE. Please read this entire manual before
you install the oven. Failure to follow instructions may result in property damage, bodily
injury or even death. Contact your local building or fire officials about restrictions and
installation inspection in your area.

PG 8 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
INSTALLATION CLEARANCES
THE FOLLOWING CLEARANCE INFORMATION APPLIES TO ALL
WOOD STONE MOUNTAIN SERIES OVENS
1" side clearance to combustible
building materials.
14" top clearance to combustible
building materials.
Any facade materials 6” to either side of
the doorway and above must be NON-
COMBUSTIBLE.
Note: 0" side and top clearance to non-
combustible materials. However, the
respective clearances to combustibles
are transferred to those non-
combustibles.
14"
Combustible building material
Non-combustible building material
Any facade wall 6” to either side of the
oven doorway and above MUST be of non-
combustible construction with no exceptions.
For use only on noncombustible floors
(installér sur un plancher incombustible
seulement). Non-combustible floor
surface AND provided with a non-
combustible floor covering at least 30"
to each side of, and 36" in front of the
door opening.

PG 9 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
FACADE DETAILS
Wood Stone Mountain Series (MS-) ovens carry an ETL Sanitation listing. The oven interior only is ETL listed to NSF/ANSI
Standard 4. This means that the surfaces of the oven which are meant to be left exposed after the facade has been put in place
have been evaluated from the standpoint of sanitation and food safety and found to comply with NSF/ANSI Standard 4. To operate
the oven in accordance with NSF/ANSI Standard 4, only pizza and bread products may be cooked directly on the floor of the oven.
Other types of food may be cooked on or in pans, or other suitable containers to prevent spillage onto the oven deck.
Go to www.woodstone-corp.com for detailed instructions for constructing a facade around a Wood Stone oven.
A removable Service Panel or storage box allows
access for service of gas and electrical components.
If this panel is not used, access and air intake of
equivalent dimensions MUST be provided at the
front of the oven.
If using an exhaust hood over the oven, make sure
your facade allows proper access for removal of the
hood filters.
Hatched areas shall not be exposed after installation of facade.
Any facade wall 6” to either side of the oven doorway and above
MUST be of non-combustible construction with no exceptions.

PG 10 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
OUTDOOR INSTALLATION
OUTDOOR INSTALLATIONS
The Mountain Series (MS-) model ovens are ETL approved for outdoor installation. When installed outdoors, the open area
beneath the oven must be enclosed, with the exception of the perforated area on the front Service Panel (or storage box) for
air intake. The oven may be installed in a weatherproof enclosure. If so be sure to maintain all clearances and adhere to the
installation requirements included in this manual.
KEEP THE AREA AROUND AND BENEATH THE OVEN CLEAR OF GRASS, LEAVES,
AND OTHER COMBUSTIBLE MATERIALS.
Wood Stone also offers the following options to enclose the area beneath the oven
Stand Wrap Kit
Lower Lagging Kit

PG 11 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
GAS SPECIFICATIONS
The Wood Stone Gas ovens are equipped with a 3/4" NPT gas connection located at the rear left of the oven. Have a licensed gas
installer provide the hook-up and test all fittings and pipe connections for leaks. Use approved gas leak detectors (soap solutions
or equivalent) over and around the fittings and pipe connections. DO NOT USE FLAME TO TEST FOR LEAKS!
SV-2 is the gas control valve that operates the interior radiant burner. SV-2 is located at the rear left beneath the oven. NOTE: The
gas valve is shipped in the ON position.
The manifold pressure test port for the radiant burner is a 1/8" NPT plugged tap located at the base of the T-junction between the
SV-2 and the radiant/interior burner.
The burner manifold pressure has been adjusted and tested at the factory. A variety of factors can influence this pressure, so be
sure to test the burner manifold pressure and adjust the valve as necessary to achieve the specified pressure.
NOTE: Maximum inlet gas pressure: 1/2 psi (14 inches W.C.)
This oven requires no modifications or adjustments for use at high altitudes.
Factory specified individual burner manifold pressures (W.C.) for RFG models
equipped to burn Natural Gas (NG)
Factory specified individual burner manifold pressures (W.C.) for RFG models
equipped to burn Propane (LP & HLP)
Model SV-2
WS-MS-4-RFG-NG 5"
WS-MS-5-RFG-NG 4.75"
WS-MS-6-RFG-NG 4.75"
WS-MS-7-RFG-NG 4.6"
Model SV-2
WS-MS-4-RFG-LP 7"
WS-MS-5-RFG-LP 8"
WS-MS-6-RFG-LP 8"
WS-MS-7-RFG-LP 9.5"
Model SV-2
WS-MS-4-RFG-HLP 7"
WS-MS-5-RFG-HLP 8"
WS-MS-6-RFG-HLP 8"
WS-MS-7-RFG-HLP 9.5"

PG 12 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
GAS SPECIFICATIONS
Hourly Natural Gas (NG) BTU/hr input rates for Wood Stone RFG models
Hourly Propane (LP & HLP) BTU/hr input rates for Wood Stone RFG models
Wood Stone recommends that the appliance’s individual shutoff valve (supplied by others) be left readily
accessible. Wood Stone also recommends that inspection and maintenance of the burner and gas piping
connections of this appliance be performed at regularly scheduled intervals and only by professional gas
appliance service agencies.
GAS CODE LIMITATIONS
The installation of this appliance must conform with local codes, or in the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1 or The Natural Gas installation Code CAN/CGA-B149.1 as applicable, including:
The appliance and its individual shutoff valve (supplied by others) must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressures in excess of 1/2 psi (3.45 kPa).
The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve (supplied by
others) during any pressure testing of the gas supply piping system at test pressure, equal to or less than 1/2 psi (3.45 kPa).
Model BTU/hr Input Rate
WS-MS-4-RFG-NG 68,000
WS-MS-5-RFG-NG 105,000
WS-MS-6-RFG-NG 105,000
WS-MS-7-RFG-NG 123,000
Model BTU/hr Input Rate
WS-MS-4-RFG-LP 60,000
WS-MS-5-RFG-LP 94,000
WS-MS-6-RFG-LP 94,000
WS-MS-7-RFG-LP 142,000
Model BTU/hr Input Rate
WS-MS-4-RFG-HLP 68,000
WS-MS-5-RFG-HLP 105,000
WS-MS-6-RFG-HLP 105,000
WS-MS-7-RFG-HLP 142,000

PG 13 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
ELECTRICAL SPECIFICATIONS
Incoming power should be connected to the terminal strip located in the Transformer Junction Box beneath the oven (see diagram
below). The standard oven model comes configured for connection to a 120 VAC circuit. The oven can be ordered configured
for connection to a 240 VAC circuit. Always refer to the equipment data plate beneath the oven to verify the proper voltage. The
voltage is also specified on the Transformer Box cover. Never connect an oven rated 120 VAC to a 240 VAC circuit or vice versa.
It is recommended that the oven be connected to its own individual branch circuit. Have a licensed electrician connect the oven
to the appropriate 120 VAC or 240 VAC circuit. Electrical diagrams are located directly to the right, behind the removable service/
intake panel of the appliance as well as inside the control box. Electrical diagrams are also located near the end of this manual.
See the FRONT PANEL ASSEMBLY section of this manual for the location of the transformer housing.
ELECTRICAL RATINGS
120 VAC, 1.1 A, 50/60 Hz
240 VAC, 1.1 A, 50/60 Hz
ELECTRICAL CODE LIMITATIONS
Electrical grounding: This appliance must be electrically grounded in accordance with local codes, or in the absence of local
codes, with the National Electrical code, ANSI/NFPA 70 or the Canadian Electrical Code, CSA C22.1 as applicable.
Terminal Strip location

PG 14 OF 48
M0031.07 MAY 2017
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WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
VENTING
The following are the manufacturer’s recommendations for venting the Wood Stone MS (Mountain Series) RFG ovens. It is
never appropriate to use “B vent” in any part of an exhaust system connected to a Wood Stone oven. All duct material must be
manufactured to the specifications of a grease duct. Submit your venting plans to your local authorities before proceeding with
your installation, as there may be additional requirements in your area. All non-solid fuel venting systems should be inspected and
cleaned at least every 3 months.
THERE ARE THREE VENTING OPTIONS:
1. Direct Connection: A listed building heating appliance chimney, also listed as a grease duct as described in NFPA 96,
connected directly to the oven flue collar and provided with a power ventilator listed for restaurant appliance exhaust. The
power ventilator should be rated for a minimum of 300 °F. Wood Stone does not recommend the use of an in-line fan. A field
built grease duct, constructed and installed to the specifications of a grease duct as detailed in NFPA 96 or the International
Mechanical Code, may also be used.
A static pressure of -0.1 inches water column is necessary at the oven flue collar to ensure that flue gas temperatures do not
exceed 300 °F at the fan inlet. This measurement may be taken by inserting the probe of the magnahelic gauge through the
oven doorway, upwards to the oven flue collar. NOTE: Double door ovens (models ending in DD), have two flue collars, both
must be connected and a static pressure of negative 0.1 inches must be maintained at each collar. See table below for CFM
required to attain the specified static pressure.
CFM REQUIREMENTS (DIRECT CONNECT)
Model CFM required
WS-MS-4-RFG 400
WS-MS-5-RFG 450
WS-MS-6-RFG 450
WS-MS-7-RFG 450
Install the venting system in accordance with the duct manufacturer’s instructions and in accordance with all local codes. All field
built components should be built to the applicable codes and standards and are subject to the approval of the authority having
jurisdiction.
NOTE: If your MS-5, MS-6 or MS-7 oven is ordered from Wood Stone without a hood, it will have a round flue adapter installed to
facilitate direct connection to a round duct. If the oven is to be installed under a hood, it MAY be necessary to remove the round
adapter to properly position the hood. This is done by removing the screws that attach the adapter to the oven. Please contact
Wood Stone if you have any questions.
Collar I.D.
Flue adapter
NOTE: MS-4 ovens come standard with a round 8" O.D. collar
and do not require the flue adapter for a direct connection.
Model Oven Flue Collar I.D. (nominal)
WS-MS-5 Mt. Adams 10 inch
WS-MS-6 Mt. Baker 10 inch
WS-MS-7 Mt. Rainier 10 inch

PG 15 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
VENTING
INSTALLATION VIEWS OF A WOOD STONE HOOD
Allow sufficient opening
between any facade
and the inside edge of
the front of the hood to
allow for filter removal
and hood cleaning. Any
front facade wall should
not be built any higher
than the top of the oven
to allow for access to
the filter.
2. A Listed Type 1 exhaust hood or one that is constructed and installed in accordance with all relevant Local and National
Codes. Wood Stone offers eyebrow-type hoods designed specifically for Wood Stone ovens. See specification sheet on
ventilators for Wood Stone ovens. Note that the notch of the hood is even with the front edge of the oven. The hood must
be installed in accordance with the hood manufacturer's instructions, and with the Standard for Ventilation Control and Fire
Protection of Commercial Cooking Operations, NFPA 96 and/or the applicable local and national codes.
3. Exhaust from Wood Stone gas-fired ovens (RFG models) can be vented using one of the previously mentioned methods OR
can be combined with exhaust from other equipment, assuming the common duct meets the construction requirements
listed in #1. If the Wood Stone oven is installed using the direct connect method, and is going to be tied into a common
duct that is connected to any hoods; the system must be engineered so that the duct pressure at the oven flue collar is
-0.1 inches W.C. (-0.14 inches W.C. for solid fuel models). Failure to properly engineer the venting system will severely
compromise oven performance and reliability. Tying a direct connected Wood Stone oven into a common duct may not be a
feasible solution for many installations. In these cases the oven must either be vented separately, or vented using a Type 1
hood.
It is never appropriate to use “B vent” in any part of an exhaust system connected to a Wood Stone oven. All duct
material must be manufactured to the specifications of a grease duct. Due to the possibility of sparks entering the duct,
exhaust systems serving solid fuel equipment MUST not be combined with exhaust systems serving other non-solid fuel
equipment. VERY IMPORTANT! WOOD STONE RECOMMENDS THAT YOU CONSULT WITH A QUALIFIED MECHANICAL
ENGINEER AND SUBMIT YOUR VENTING PLANS TO LOCAL CODE AUTHORITIES BEFORE PROCEEDING WITH
INSTALLATION.
Flat face hood Curved face hood

PG 16 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
FLUE ADAPTER
MOUNTAIN SERIES OVENS: FLUE ADAPTER
The flue adapter unit is designed to facilitate connection to a round duct. Use the stainless steel screws and sealant provided to
attach the flue adapter to the exhaust outlet on the oven if it is not already installed. NOTE: MS-4 ovens come standard with a
round 8" O.D. collar and do not require the flue adapter for a direct connection.
Note: If using a Selkirk or other modular-type duct, attach according to the manufacturer’s instructions. Otherwise, the duct must
be attached with a full perimeter weld. All duct must be grease-rated duct. If the oven is going to be enclosed, the flue adapter
and exhaust outlet must be wrapped with an insulating material approved for use with a grease-duct.
Apply the supplied Engineered
Grade Ceramic Sealing Compound
to the underside of the Flue Adapter
with an unbroken bead around
the perimeter, and around each
individual screw hole.
Then fasten with the supplied
screws.
Underside of Flue Adapter showing
where Ceramic Sealing Compound
should be applied
FLUE ADAPTER INSTALLATION (If not already installed)
Flue adapter attached
to oven flue collar
If the oven is to
be enclosed, wrap
with an approved
insulation.
Flue adapter

PG 17 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
FIRE SUPPRESSION
FIRE SUPPRESSION
Check with your local code officials to see if fire suppression is required in your area. If fire suppression is required, you must
vent the oven using a Type 1 hood, constructed and installed in accordance with NFPA 96. If fire suppression is required, Wood
Stone recommends providing protection for the hood and duct plenum. The fusible link in the hood must be rated at 450 °F
minimum. Wood Stone offers Listed Exhaust hoods for our ovens that are pre-piped for ANSUL R-102 fire suppression. Wood
Stone does not recommend aiming any fire suppression nozzles into the cooking chamber of the oven. All installations
are subject to the approval of the local authority having jurisdiction.

PG 18 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
VENTING DO'S & DON'TS
VENTING DO’S AND DON’TS
When installing a Wood Stone Mountain Series oven there are some basic guidelines to follow regarding oven venting that will
help ensure proper operation and performance of the gas burners on the oven. These guidelines will also help prevent damage
to the oven's gas and electrical components due to improper venting and installation. Damage caused by improper venting and
installation is not covered by the oven warranty. This information applies to all Wood Stone Mountain Series (MS) ovens equipped
with one or more gas burners.
Most Wood Stone Mountain Series ovens are built into some sort of wall structure or enclosure. This creates the potential for
different venting scenarios that can be detrimental to the operation and performance of the oven burners. Here are some basic
rules that to follow that will ensure a properly functioning oven installation. Illustrated examples are included on the following
pages.
RULE 1
The ONLY pathway for air to enter the space beneath the oven should be at the front of the oven at the perforated opening in the
oven Service Panel provided with the oven, or on ovens equipped with an optional Storage Box, through the perforations provided
on the oven Storage Box. This will eliminate the chance of air movement or cross drafts beneath the oven that can disrupt the
oven burners.
RULE 2
DO NOT block the flow of air through the front Service Panel. It is required to provide necessary combustion air to the oven
burners. Airflow and service access MUST be provided from the front of the oven only at this Service Panel. DO NOT relocate the
oven air intake (see Rule 1).
RULE 3
To ensure proper venting of the oven, you must use an appropriate exhaust fan as described in this manual. There must also be
an adequate source of make-up air provided to your kitchen space—the room that the oven opens into. The make-up air supply
should not point directly at the oven. Other than the oven Service Panel, do not provide make-up air or other ventilation into an
enclosure that surrounds the oven (see Rule 1). Without proper make-up air the oven, (or any gas equipment), will not vent and
operate correctly.
Please review the illustrations on the following pages.

PG 19 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
VENTING DO'S & DON'TS
DIRECT CONNECT VENTING EXAMPLES
Example 1 shows a proper installation. The
enclosure around the oven is completely
sealed so that the only air entering the space
beneath the oven comes through the oven
Service Panel.
Equal air pressure inside and
outside of oven room
Exhaust
flow
direction
is normal
Stud wall
Facade
surface
Air intake area
on removable
Service Panel
properly
exposed
Intake air flows
through designed
intake vents in the
Service Panel to
oven burners
1 Acceptable venting
Example 2 is not acceptable because the
combustion air intake is blocked, preventing
combustion air from reaching the oven
burners. The burners will not function properly,
and will lead to damage of oven components.
2. Unacceptable venting
Exhaust
flow
direction is
normal
Facade material
improperly placed
over oven air
intake
Insufficient
combustion air
resulting in burner
problems & poor
oven performance
Equal air pressure
inside and outside of
oven room

PG 20 OF 48
M0031.07 MAY 2017
An ongoing program of product improvement may
require us to change specifications without notice.
WOOD STONE CORPORATION
1801 W. Bakerview Rd.
Bellingham, WA 98226 USA
TOLL FREE 800.988.8103
TEL [phone]
FAX [phone]
E-MAIL [e-mail]
woodstone-corp.com
Mountain Series RFG
Installation and Operation Manual
VENTING DO'S & DON'TS
DIRECT CONNECT VENTING EXAMPLES
Example 3 shows an incorrect installation
where an additional vent was added to
the wall behind the oven, creating an air
pressure difference causing air movement
beneath the oven and disrupting the
operation of the oven burners. This air
movement can be so severe as to cause
a downdraft, pulling the exhaust down
the oven flue and backwards through the
burners, leading to heat damage of oven
components.
3. Unacceptable venting
Neutral room
air pressure
Exhaust flow
direction is
reversed
Equal air pressure
inside and outside of
oven room
Low pressure is created
by HVAC or any air
moving equipment
outside the oven room
Exhaust air is pulled
backwards through
oven burners
An added vent
intended to increase
air supply
Airflow to oven is
altered as air moves
from normal to low
pressure
Example 4 shows an incorrect installation
where the enclosure surrounding the oven
is open to the attic space above the ceiling.
Air can move rapidly through the space
enclosing the oven to the lower pressure
area within the attic space. This can
cause a downdraft situation at the oven,
pulling air and heat backwards through the
oven burners, leading to damage of oven
components.
4. Unacceptable venting
Air flow Low pressure area
Exhaust
flow
direction is
reversed
Combustion air is
diverted from oven
burners because
room is open to a
low pressure area.
Exhaust air is
pulled backwards
through oven
burners.
False ceiling