Wood Stone MOUNTAIN Series User 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
MOUNTAIN SERIES
Commercial & Residential Stone Hearth Oven
Gas-Fired, Wood-Fired and
Gas/Wood Combination Models
MOUNTAIN SERIES WS-MS-(4, 5, 6, 7)
MOUNTAIN HOME WS-MH-(4, 5)
TRADITIONAL SERIES WS-TS-(5,6)
DOC NO M0014.09 REVISED APRIL 2019
Service Manual

Mountain Series
Service Manual
PG 2 OF 56
M0014.09 APRIL 2019
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
TABLE OF CONTENTS
TABLE OF CONTENTS
Mountain Series Ovens� � � � � � � � � � � � � � � � � � � � � � � 3
Before You Begin���� � � � � � � � � � � � � � � � � � � � � � � � � � 4
Product Overview� � � � � � � � � � � � � � � � � � � � � � � � � � � 5
Venting � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Wood-Fired Oven Overview� � � � � � � � � � � � � � � � � � � � 7
Wood Oven Troubleshooting � � � � � � � � � � � � � � � � � � � 8
Electrical Diagram (Wood)� � � � � � � � � � � � � � � � � � � � � 9
Gas Oven Overview � � � � � � � � � � � � � � � � � � � � � � � � 10
Operational Overview (Gas)� � � � � � � � � � � � � � � � � � � 11
OPERATIONAL SEQUENCE
W-IR� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 12
RFG � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 13
RFG-IR � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 14
Legacy � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 15
Gas Oven Components� � � � � � � � � � � � � � � � � � � � � � 16
Oven Controllers � � � � � � � � � � � � � � � � � � � � � � � � � � 17
Gas System Components � � � � � � � � � � � � � � � � � � � � 20
Gas Oven Troubleshooting � � � � � � � � � � � � � � � � � � � 22
Burner Troubleshooting� � � � � � � � � � � � � � � � � � � � � � 30
IR Burner Troubleshooting� � � � � � � � � � � � � � � � � � � � 34
Common Repair Procedures � � � � � � � � � � � � � � � � � � 36
Gas Component Diagrams � � � � � � � � � � � � � � � � � � � 39
Electrical Diagrams � � � � � � � � � � � � � � � � � � � � � � � � 43
Parts List� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 50
Gas Specifications � � � � � � � � � � � � � � � � � � � � � � � � � 52
Electrical Specifications � � � � � � � � � � � � � � � � � � � � � 54
Technical Verification Checklist � � � � � � � � � � � � � � � 55
Limited Warranty � � � � � � � � � � � � � � � � � � � � � � � � � � 56

Mountain Series
Service Manual
PG 3 OF 56
M0014.09 APRIL 2019
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 OVENS
WOOD STONE OVEN SERVICE MANUAL FOR GAS-FIRED AND WOOD-FIRED
MOUNTAIN SERIES OVENS
FOR WS-MS-(4, 5, 6 AND 7) MODELS
TS-(5, 6) MODELS
ADDITIONAL COPIES AVAILABLE UPON REQUEST
This manual is for use only by qualified service personnel. It is recommended that this oven be
installed, maintained and serviced by qualified professionals. Warning: Improper installation,
adjustment, alteration, service or maintenance can result in property damage, injury or death.
Read the installation, operation and maintenance instructions thoroughly before installing or
servicing this equipment.
!

Mountain Series
Service Manual
PG 4 OF 56
M0014.09 APRIL 2019
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
BEFORE YOU BEGIN...
INTRODUCTION
This manual primarily covers the Mountain Series (MS) gas-fired, wood-fired and wood/gas ovens� Most of the general and
troubleshooting information applies to other Wood Stone models as well� For specific information regarding other models, please
contact the Wood Stone Service Department� This manual is for use only by Trained and Qualified Service Personnel�
WARNING: Improper installation adjustment, alteration, service or maintenance can result in property damage, injury or death�
Please read and understand all pertinent instructions before attempting to install or perform any kind of service on this equipment�
BE SAFE.
SERVICE DEPARTMENT AND WARRANTY INFORMATION
If you have any questions please call the Wood Stone Service Dept� at 1-800-988-8103� Normal hours are 8 a�m� to 5p�m� Pacific
Standard Time Monday through Friday� After hours and on weekends call and follow the instructions to leave a message on the
emergency service voice mail� A Wood Stone technician will be paged and return your call promptly�
YOU MUST CONTACT WOOD STONE BEFORE PROCEEDING WITH ANY WARRANTY SERVICE.
We encourage you to call whenever any service is performed� By doing this we can direct you toward the best solution to the
problem� It also allows us to check and update the service history we keep for each oven� Our goal is to help you service the
equipment correctly and as efficiently as possible�
Parts are available through Wood Stone� Please contact the factory for pricing� Additional Service Manuals and Installation and
Operation Manual are also available�
The Installation and Operation Manual may also be downloaded from the Wood Stone web site at: www�woodstone-corp�com�

Mountain Series
Service Manual
PG 5 OF 56
M0014.09 APRIL 2019
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
PRODUCT OVERVIEW
THE FOUR CATEGORIES OF THE MOUNTAIN SERIES OVENS
-W MODELS
Wood-only models use wood as the only heat source� See the Installation and Operation Manual for specific information regarding
the burning of wood�
RFG MODELS
These models have a Radiant flame burner located at the rear or, optionally, on either side of the oven� This burner is designed
to give the appearance of a wood-fire type flame� The burner runs continuously when the oven is turned on� The oven has a
manually controlled Throttle Valve, the Flame Height Control Knob, to raise and lower the flame to control the oven temperature�
RFG-IR MODELS
These models have a Radiant flame burner as well as a thermostatically controlled, Underfloor Infrared (IR) burner� The Radiant
burner is the main heat source in this oven� This burner is designed to give the appearance of a wood-fire type flame� The burner
runs continuously when the oven is turned on� The oven has a manually controlled Throttle Valve to raise and lower the flame to
control the oven temperature� The Underfloor IR Burner is designed to assist in initial heat-up and periods of high production�
W-IR
These are wood-fired models with a thermostatically controlled Underfloor Infrared (IR) burner� The wood fire is the main heat
source� The underfloor burner is designed to assist in initial heat-up and periods of high production�
Gas-fired ovens that include a “-W” in the model number are configured to allow the burning of wood in addition to the gas
burners� See the Installation and Operation Manual for specific information regarding the burning of wood�

Mountain Series
Service Manual
PG 6 OF 56
M0014.09 APRIL 2019
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
VENTING
VENTING AND INSTALLATION INFORMATION
Complete installation and venting information can be found in the Installation and Operation Manual supplied with the oven�
Additional copies are available online at: woodstone-corp�com or call Wood Stone� Below is a brief overview�
OVEN VENTING
The Wood Stone Mountain Series ovens may be installed under a hood, or direct connected� All ductwork must be constructed
and installed to the specifications of a grease duct� If a hood is used it must be a Type 1 hood (grease-rated)� A power ventilator
listed for restaurant exhaust applications must be provided� If fire suppression is required by the local jurisdiction, the oven must
then be vented with 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�
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�

Mountain Series
Service Manual
PG 7 OF 56
M0014.09 APRIL 2019
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
WOOD-FIRED OVEN OVERVIEW
WOOD-FIRED OVENS
TEMPERATURE READOUT
The only electrical components on the wood-fired ovens are in the Temperature Readout Display at the front of the oven� Be
aware that these displays are often relocated to an area beside the oven to accomodate kitchen design requirements� The
assembly is made up of three components:
1. A Thermocouple that is installed into the floor of the oven from below�
2. A Temperature Readout Assembly, with settings adjustable between Fahrenheit and Centigrade�
3. A Transformer, available as 120 VAC or 240 VAC� Outputs 12 VAC to power the Readout Display�
TEMPERATURE READOUT COMPONENTS
Readout Assembly Faceplate
Readout Display Thermocouple

Mountain Series
Service Manual
PG 8 OF 56
M0014.09 APRIL 2019
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
WOOD OVEN TROUBLESHOOTING
Display does not light 1. Breaker to oven tripped or turned off
2. If the breaker is fine, verify proper incoming power at input side of
Transformer� If incoming power is present, verify 12 VAC at output of
Transformer� If 12 VAC present replace temperature readout� If 12 VAC is
not present, replace the Transformer�
Display lights but readout is
erratic or displays ”EEE”
Check that the Thermocouple connections on the readout module are
correct: Red to TC- (negative), yellow to TC+ (positive)�
If the connections are good, remove the Thermocouple wires from
the display� Jumper between TC+ and TC- on the display; the display
should show the ambient temperature� If it does not display the ambient
temperature, replace the readout� If the readout displays the ambient
temperature (when jumpered), replace the Thermocouple�
Note: Some models may include a plug connection between the readout
box and the Thermocouple� If applicable, check this connection� If this
connection is defective, remove and wire the Thermocouple directly�
CRACKING IN THE FLOOR OR DOME OF THE OVEN
Some cracking of the oven refractory, especially hairline cracking, is completely normal and in no way degrades the performance
of the oven� Any abnormal or extreme cracking (larger than 1/8 inch) should be brought to the attention of the Wood Stone
Service Department� Do not attempt any type of repair to the oven refractory unless specifically instructed to do so by the factory,
and then, only with materials supplied by Wood Stone�
Symptom Probable Cause and/or Solution

Mountain Series
Service Manual
PG 9 OF 56
M0014.09 APRIL 2019
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
ELECTRICAL DIAGRAM (WOOD)
Solid Fuel Only
DATE:
DIAG #: WD051 Rev. 0
3/27/2014
Bellingham, WA [phone] www.woodstone-corp.com
Thermocouple Readout
12 VAC Yellow + Red -
GND
XFMR
110-120 VAC
50-60Hz
wired by others Type K
Thermocouple
Probe
Solid Fuel Only EM-2V
DATE:
DIAG #: WD052 Rev. 0
3/27/2014
Bellingham, WA [phone] www.woodstone-corp.com
Thermocouple Readout
12 VAC Yellow + Red -
TB-A
GND
XFMR
220-240 VAC
50-60Hz
wired by others Type K
Thermocouple
Probe
120 VAC
240 VAC

Mountain Series
Service Manual
PG 10 OF 56
M0014.09 APRIL 2019
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
GAS OVEN OVERVIEW
GAS OVENS - OPERATIONAL OVERVIEW AND COMPONENTS
RFG-IR
IR and Radiant burner
Radiant burner only
RFG
IR burner only
W-IR

Mountain Series
Service Manual
PG 11 OF 56
M0014.09 APRIL 2019
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
OPERATIONAL OVERVIEW (GAS)
GAS-FIRED OVENS OPERATIONAL OVERVIEW
Wood Stone manufactures three different model types of gas-fired ovens�
RFG MODELS
RFG models have a Radiant flame burner located at the rear or either side of the oven� This burner is designed to give the
appearance of a wood-fire type flame� The burner runs continuously when the oven is turned on� The oven has a manual Control
Throttle Valve to raise and lower the flame to control the oven temperature�
RFG-IR MODELS
These models have a radiant flame burner as well as a thermostatically controlled Underfloor Infrared (IR) burner� The Radiant
burner is the main heat source in this oven� The Radiant burner is designed to give the appearance of a wood-fire type flame� The
burner runs continuously when the oven is turned on� The oven has a manually Controlled Throttle Valve, the Flame Height Control
Knob, to raise and lower the flame to control the oven temperature� The Underfloor burner is designed to assist in initial heat-up
and during periods of high production�
W-IR MODELS
These are wood-fired models with a thermostatically controlled Underfloor Infrared (IR) burner� The wood fire is the main heat
source� The IR burner is designed to assist in initial heat-up and during periods of high production�
Gas fired ovens that include a “-W” in the model number are configured to allow the burning of wood in addition to the gas
burners� See the Installation and Operation manual for further details�
BURNER FUNCTION
RADIANT FLAME BURNER
The Radiant burner is the main heat source for the oven, and it runs continuously when the oven is turned on� The control for
this burner is the Flame Height Control Knob located on the front of the oven, generally on the left side� There is no thermostatic
control for the Radiant burner—the operator manually adjusts the flame height with the Flame Height Control Knob to control the
temperature of the oven�
UNDERFLOOR INFRARED (IR) BURNER
The IR burner is installed beneath the floor of the oven� It is controlled independently of the Radiant burner by a temperature
control located in the oven Control Box� This box is usually located on the front of the oven on the right side, but sometimes this
might be moved to a different spot to accommodate the type of installation� The Controller incorporates a programmable Hearth
Set Point and a Hearth (floor) Temperature display� Remember the IR is not the primary heat source for the oven�

Mountain Series
Service Manual
PG 12 OF 56
M0014.09 APRIL 2019
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
OPERATION SEQUENCE: W-IR
* NOTE: On ovens equipped with the Honeywell Smart Valves that have a round on/off control knob (instead of a slide switch), the
valve will not time out if the pilot fails to light� The valve will remain powered and the Igniter will remain on indefinitely
until the pilot lights or power is turned off�
BURNER OPERATION SEQUENCE
W-IR OVEN - TYPE 2 CONTROLLER
Floor temperature below Hearth Set
Point – Controller sends power to
SV-1 valve, SV-1 powers Igniter and
opens Pilot valve�
Pilot does not light, SV-1
times out*, Controller will
flash “chec”�
Power on�
Floor temperature above
Hearth Set Point–
No action�
Pilot lights, SV-1 senses
Pilot Flame, Igniter off�
SV-1 opens, Underfloor
Infrared Burner lights,
Hearth Heat light comes
on�
Floor reaches Hearth
Set Point temperature,
Controller turns off
power to SV-1 to turn off
Underfloor IR burner�
Controller reads floor temperature
from Thermocouple�

Mountain Series
Service Manual
PG 13 OF 56
M0014.09 APRIL 2019
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
OPERATION SEQUENCE: RFG
* NOTE: On ovens equipped with the Honeywell Smart Valves that have a round ON/OFF control knob (instead of a slide switch),
the valve will not time out if the pilot fails to light� The valve will remain powered and the Igniter will remain on indefinitely
until the pilot lights or power is turned off�
BURNER OPERATION SEQUENCE
RFG OVEN - ALL CONTROLLERS
Power on�
Pilot lights�
SV-2 senses Pilot Flame, turns
Igniter off– SV-2 opens� Burner
lights� Amber light comes on or, on
touchpad-style Controllers, dome
light comes on�
Pilot does not light– SV-2 times out�*
Touch-style Controllers will flash “chec”�
SV-2 valve powers Igniter and opens
pilot valve�
Burner remains on until oven
Controller is turned off�

Mountain Series
Service Manual
PG 14 OF 56
M0014.09 APRIL 2019
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
OPERATION SEQUENCE: RFG-IR
* NOTE: On ovens equipped with the Honeywell Smart Valves that have a round on/off control knob (instead of a slide switch), the
valve will not time out if the pilot fails to light� The valve will remain powered and the Igniter will remain on indefinitely
until the pilot lights or power is turned off�
Power on�
Pilot lights�
Pilot does not light, SV-2 times out*�
SV-2 valve powers Igniter and opens
Pilot valve to Radiant (rear) burner�
SV-2 senses Pilot Flame
– Igniter off, SV-2 opens,
Burner lights, Dome
Flame Indicator light
comes on�
Floor reaches the Hearth Set
Point temperature, Controller
turns off power to SV-1 to turn off
Underfloor IR Burner�
Pilot does not light – SV-1
times out*, Controller
flashes “chec”�
BURNER OPERATION SEQUENCE
RFG-IR-(W) OVEN - TYPE 2 CONTROLLER
Pilot lights, SV-1 senses Pilot
Flame, Igniter off, SV-1 opens,
Underfloor IR Burner lights, Hearth
Heat light on�
Floor temperature below Hearth
Set Point – Controller sends
power to SV-1 valve, SV-1 powers
Igniter and opens
Pilot valve�
Radiant burner remains
on until oven Controller is
turned off�
Floor temperature above
Hearth Set Point –
No action�

Mountain Series
Service Manual
PG 15 OF 56
M0014.09 APRIL 2019
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
OPERATION SEQUENCE: LEGACY
BURNER OPERATION SEQUENCES
RFG-IR OVEN - TYPE I CONTROLLER
Power On
Temperature Controller
and display�
SV-2 Powers Igniter–
Pilot Valve opens�
Pilot does not light–
SV-2 times out�*
Pilot lights�
.
SV-2 senses Pilot Flame–
Igniter off– SV-2 opens–
Burner lights– Amber
Dome Flame indicator
light comes on�
Radiant burner remains
on until oven is turned off�
Floor Temperature
above Hearth Set
Point– No action�
Floor Temperature below Hearth Set Point–
Controller sends power to SV-1– SV-1
powers Igniter and opens Pilot Valve�
Pilot does not light–
SV-1 times out�*
Pilot lights– SV-1 senses Pilot Flame–
Igniter off– Red Hearth Heat indicator light
comes on– SV-1 opens– Burner lights�
Floor reaches the Hearth Set Point
temperature– Controller turns off power to
SV-1 and IR burner shuts off�
* NOTE: On ovens equipped with the Honeywell Smart Valves that have a round ON/OFF control knob (instead of a slide switch),
the valve will not time out if the pilot fails to light� The valve will remain powered and the Igniter will remain on indefinitely
until the pilot lights or power is turned off�

Mountain Series
Service Manual
PG 16 OF 56
M0014.09 APRIL 2019
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
GAS OVEN COMPONENTS
24 VOLT TRANSFORMERS
This is the power supply for all of the electrical components on the oven� Here are two
styles in use:
ACME MULTI-TAP TRANSFORMER
Wiring is pre-configured at the factory for the correct voltages� The incoming power
connection is made to the red and white taped leads and the green ground wire that
are found inside the Transformer case� Do not alter any of the other wiring within the
Transformer case� 24 VAC output can be tested in the adjacent junction box� 24 VAC
should be present between terminal P (pink wire) and terminal 8 (white wire)� Some
models may have a fuse mounted on this Transformer�
CLASS 2 TRANSFORMER
This Transformer that incorporates a circuit breaker on its output� This unit is installed
inside a junction box on the left side of the Transformer Plate� Incoming power is
connected to the terminal strip (marked L N G) inside this box� L=line� N=neutral�
G=ground� 24 VAC output can be measured in the adjacent junction box� 24 VAC
should be present between terminal P (pink wire) and terminal 8 (white wire)�
TRANSFORMER PLATE ASSEMBLY (PRIOR TO MAY 2015)
The Transformer Plate is located beneath the oven on the back stand� It consists of one
of the two types of Transformers and a Junction Box� All wiring within this 4x4" Junction
Box is low voltage� It allows easy voltage testing to various oven components for
troubleshooting� All wiring harnesses and the Thermocouple are routed through terminal
strips within this box�
Do not alter any wiring within this box or on the oven� Under no circumstances is high
voltage (120 VAC) wiring to be connected within this box� No external equipment should
be connected to the low voltage wiring of the oven� This may affect the operation of
the oven and will void the oven warranty� High voltage connections are to be made only
within the Transformer case—ACME, or the Transformer junction box –Class 2� The
Class 2 Transformer may only be used where the incoming power is 120 VAC� Never
connect 240 VAC to the Class 2 Transformer.
TRANSFORMER PLATE ASSEMBLY (AFTER MAY 2015)
The Transformer Plate is located beneath the oven on the back stand� It consists of one
of the two types of Transformers within an 8x12" Junction Box� It allows easy voltage
testing to various oven components for troubleshooting� All wiring harnesses and the
Thermocouple are routed through terminal strips within this box�
Do not alter any wiring within this box or on the oven� No external equipment should
be connected to the low voltage wiring of the oven� This may affect the operation of
the oven and will void the oven warranty� Incoming power must be 120 VAC when
configured with the Class 2 Transformer. Do not connect to 240 VAC!
GAS OVEN COMPONENTS
The following is a list of the key electrical and gas components found in Wood Stone gas-fired ovens, accompanied by information
about the individual parts�

Mountain Series
Service Manual
PG 17 OF 56
M0014.09 APRIL 2019
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
OVEN CONTROLLERS
The green button is a “normally open” switch that turns the oven ON� The red button is a “normally closed” switch that shuts
the oven OFF� The lights across the top indicate the following: Green: Power ON, Amber: Unit is sensing flame rectification at the
Radiant burner inside the oven, Red: Unit is sensing flame rectification at the Underfloor IR burner�
The digital display is the Temperature Control Module for the Underfloor IR burner� It does not control the Radiant burner. The
red HEAT ON light indicates that the control is calling for IR burner operation� The number shown on the display when the oven
is running is the thermostatic Hearth Set Point for the IR burner� To display the actual floor temperature press the right-most pad
marked either TEMP/ADV OR FLOOR TEMP, (depending on the unit)� To change the Hearth Set Point, press and hold the PROG
button until the display flashes “Set”, then “Pnt”� At this time, adjust to the desired Hearth Set Point using the UP OR DOWN
ARROWS; when the desired Hearth Set Point is reached, press the PROG button again to “lock in” the new temperature
There are actually two slightly different versions of this Temperature Control Module. One will have “NCC National Controls
Corporation” written on the front and the right most button reads TEMP/ADV� The second version reads “Wood Stone Corp�” on
the front and the right most button reads FLOOR TEMP� The only difference is that the unit that reads “NCC” has programmable
hysteresis parameters and the Wood Stone version has these locked� It is critical that the factory settings on the NCC model are
not altered� See the Troubleshooting section for information on the hysteresis settings�
ADDITIONAL COMPONENTS
Located inside the Control Box are a 5 A fuse, an “ice cube” relay, a terminal strip and a wiring diagram for the oven�
OVEN CONTROLLERS
There are currently five types of Controllers found on Wood Stone gas-fired ovens� A brief overview for each of them follows�
Detailed troubleshooting instructions will be found in the Troubleshooting section of this manual�
TYPE 1 CONTROLLER
This Controller was used on gas and wood/gas combination ovens built prior to March 2000� This unit is comprised of a Control
Box that has one green and one red push button on the front� There are two or three indicator lights across the top, and a digital
display with four touch pads: PROG, ARROW UP, ARROW DOWN followed either by TEMP/ADV or FLOOR TEMP�

Mountain Series
Service Manual
PG 18 OF 56
M0014.09 APRIL 2019
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
OVEN CONTROLLERS
TYPE 4 RFG CONTROLLER
This control is used on RFG models produced
after August 2005, Bistro series ovens,
and some field conversion ovens� It has a
Temperature display, ON/OFF and F/C functions�
Also included on the touch-pad are on/off, F/C
and up and down adjustment arrows� Other than
the Controller board there are no other parts
inside the box� The DIP switches on the Controller
board are preset at the factory and are used to
configure the board for the type of oven—
RFG-IR, W-IR or RFG� There should be no reason
to alter these settings�
DIP SWITCH SETTINGS
RFG-IR - Both ON
W-IR - #1 OFF, #2 ON
RFG - Both OFF
TYPE 2 (TOUCHPAD) RFG-IR, W-IR CONTROLLER
This style of Controller is the standard on all gas ovens produced after March 2000� RFG models produced after August 2005 use the
Type 4 control� On the front of the control is a touch-pad overlay with a Hearth Temperature display, and depending on the oven model
– a Hearth Set Point display, and Dome flame and Hearth Heat indicator lights�
RFG CONTROLLER (LEGACY)
This Controller is found on the RFG type ovens
manufactured prior to March of 2000, and on previously
installed ovens that have been converted from wood-
fired only (-W) to RFG gas by Wood Stone� Ovens
built after March of 2000 use the Type 2 or Type 4
Controller� The function of this Controller is to turn the
Radiant burner on or off, and to display the current
floor temperature� RFG ovens are equipped with only a
Radiant flame burner, which runs at all times when the
oven is turned on� This Controller housing is smaller
than the Type 1 or the Touchpad� On the front it has a temperature display, ON button, OFF button, green power indicator light, and an
amber flame rectification indicator light� Mounted to a bracket on the back of the faceplate are a relay and a terminal strip� It should
be noted that on this Controller the Temperature Readout only is powered by 12 VAC output of the ACME Transformer� The readout
remains on as long as incoming power is supplied to the oven� The other components in the Controller and on the oven are still
powered by the 24 VAC output of the ACME Transformer� When this Controller is used, it is accompanied by a 3 A fuse mounted to the
Transformer box�

Mountain Series
Service Manual
PG 19 OF 56
M0014.09 APRIL 2019
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
OVEN CONTROLLERS
8-FOOT RFG CONTROLLER
This Controller differs slightly from the standard RFG Controller because this oven is equipped with three Radiant burners� It
utilizes a larger box than the Controller described above� It does not have a power ON indicator light� The three lights across the
top are indicators for each of the three burners� They are on when the respective burner has lit and is running� This unit uses
a Temperature Readout that is powered by 12 VAC coming from a tap on the ACME Transformer� This display is lit whenever
incoming power is supplied to the oven, regardless of whether the oven is turned ON or not�
Just below this display is a red Over-Temperature light� This light indicates that the over temperature module located in the
junction box on the Transformer Plate has tripped and shut off 24 VAC power to the relay and start switch� All of the other
components on the oven and Controller are powered by the 24 VAC output of the ACME Transformer� Additional parts inside
the Control Box are a relay, terminal block, four 2 A fuses (one for each Gas Valve and one for the temperature readout) and
a 5 A fuse for the entire 24 volt circuit� NOTE: The over temperature module will trip if the oven temperature exceeds 800 °F
and the red indicator below the temperature readout will light� To reset, the oven floor temperature must drop below 800 °F�
Then turn the Controller off, then back on to reset and run the oven�
8-Foot RFG Controller

PG 20 OF 56
M0014.09 APRIL 2019
Mountain Series
Service Manual
GAS SYSTEM COMPONENTS
PILOT IGNITER ASSEMBLY
The Pilot/Igniter is used in conjunction with the smart valve to ignite the burner
and provide flame sensing (flame rectification) for the Gas Valve� It uses a
tungsten glow coil for hot surface ignition� This coil is fragile� Flame rectification
is achieved from the Flame Rod to ground through the Pilot Tubing� The Pilot/
Igniter assembly wiring is connected to the Gas Valve via Molex connector� On
the connector the two wires closest to each other supply power to the glow coil�
GAS VALVES
Wood Stone uses a “smart” type Gas Valve to control gas flow to each burner� These
valves do not require the use of a separate ignition module, the ignition control
system is integrated into the circuitry of the valve itself� Electrical connections are
made via Molex connectors� The same valve is used regardless of oven size or
model, IR or Radiant burner� When used on the IR burner it is referred to as SV-1�
When used on the Radiant burner it is referred to as SV-2� An adjustable pressure
regulator is incorporated into the valve� There is also an adjustment on the valve for
the Pilot Flame height� Note: Maximum incoming line pressure must not exceed 14"
W�C� (34�8mbar)� Use an external regulator if line pressure exceeds 14" W�C�
RADIANT BURNER ASSEMBLY
This is the burner typically located at the rear of the oven and
produces the flames visible inside the dome, but may also be
located on one or both sides� It consists of a stainless steel burner
housing, a cast iron burner manifold, the burner jets and the Flame
Retention Springs that are attached to each jet� There is an opening
in the burner housing through which the Pilot/Igniter assembly is
mounted�
THROTTLE CONTROL VALVE
This Valve is located on the left side of the oven in front, or at the rear left� The Flame Height Control Knob is always at the front
of the oven� This is what the operator uses to control the flame height of the Radiant burner only� It is not a shutoff Valve� Do not
remove, or replace this Valve with anything but a Valve supplied by Wood Stone� Replacing this Valve with any part not supplied
by Wood Stone could create a DANGEROUS operating condition� The Valve is shown below with the Control Rod and Cotter Pin�
Regulator
Pilot adjustment
Older ovens are equipped with a butterfly style Valve that does not require the Control Rod� The handle (wings) are cast as part
of the Valve stem� On newer ovens the Throttle Valve is located at the rear of the oven above the SV-2 Gas Valve (shown)� The
knob assembly is clamped to an EMT extension beneath the oven, which is then in turn connected to the Valve with a cotter key�
Throttle
Control Valve
Control Rod
EMT Throttle Rod Extension
Flame Height
Control Knob
Cotter Pin Clamp