Enviro P4 User manual

WARRANTY REGISTRATION
enviro.com/warranty
P4
F R E E - S TAN D I N G PE LL E T S TOVE
OWNER’S MANUAL
Version Française: www.enviro.com/fr.html
50-3136
PLEASE READ THIS ENTIRE MANUAL BEFORE INSTALLATION AND USE
OF THIS PELLET BURNING ROOM HEATER. FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN PROPERTY DAMAGE, BODILY INJURY
OR EVEN DEATH
CONTACT YOUR BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS
AND INSTALLATION INSPECTION REQUIREMENTS IN YOUR AREA.
INSTALLER: LEAVE THIS MANUAL WITH THE WOOD STOVE.
CONSUMER:RETAIN THIS MANUAL FOR FUTURE REFERENCE

2
Table of Contents
Introduction...................................................................................................................3
Important Safety Data........................................................................................................3
Emissions and Efficiencies...................................................................................................4
Safety Warnings And Recommendations..............................................................................5
Rating Label Location.........................................................................................................7
Pellet Quality......................................................................................................................7
Installation.......................................................................................................................8
Deciding Where to Locate the Appliance............................................................................8
Unpacking and Removing Pellet Stove From Pallet..............................................................8
Clearances to Combustibles................................................................................................10
Alcove Clearances.............................................................................................................10
Vent Termination Requirements.........................................................................................11
Outside Fresh Air Connection...........................................................................................12
Exhaust and Intake Locations...........................................................................................12
Mobile Home Installation..................................................................................................13
Corner Through Wall Installation.......................................................................................13
Horizontal Exhaust Through Wall Installation....................................................................14
Through Wall Vertical Rise Horizontal Termination - Freestanding.......................................15
Inside Vertical Installations................................................................................................16
Outside Vertical Installations..............................................................................................16
Hearth Mount Installation................................................................................................17
Thermostat Installation.....................................................................................................18
Specifications.......................................................................................................................19
Dimensions and Specifications...........................................................................................19
Operating Instructions..................................................................................................................20
Control Board Functions....................................................................................................20
Automatic Safety Features of Your Pellet Stove...................................................................20
Operating Your Pellet Stove...............................................................................................21
Turning Your Pellet Stove Off..............................................................................................21
Damper Set-Up.................................................................................................................21
Guidelines For Fine-Tuning For Fuel Quality........................................................................22
Routine Cleaning and Maintenance................................................................................................23
Troubleshooting.................................................................................................................27
Wiring Diagram...........................................................................................................................30
Parts List.....................................................................................................................................31
Parts Diagram..............................................................................................................................33
Rating Label................................................................................................................................35
Warranty..................................................................................................................36
Installation Data Sheet...............................................................................................................37
Notes.......................................................................................................................................38

3
Introduction
Important Safety Data:
Please read this entire Owner’s Manual before installing or operating your ENVIRO Pellet Stove.
Failure to follow these instructions may result in property damage, bodily injury or even death. Any
unauthorized modification of the appliance or use of replacement parts not recommended by the
manufacturer is prohibited.
Contact your local building or fire official to obtain a permit and any information on installation restrictions and
inspection requirements for your area. All local regulations, including those referring to national and European
Standards need to be complied with when installing this appliance.
To prevent the possibility of a fire, ensure that the appliance is properly installed by adhering to the installation
instructions. An ENVIRO dealer will be happy to assist you in obtaining information with regards to your local
building codes and installation restrictions.
The stove’s exhaust system works with negative combustion chamber pressure and a slightly positive chimney
pressure. It is very important to ensure that the exhaust system be sealed and airtight. The ash pan and viewing
door must be locked securely for proper and safe operation of the pellet stove. Operating with door open could
cause a fire inside the house as well as the release of carbon monoxide into the living space.
Carbon monoxide is a colorless and odorless gas, to prevent it from poisoning you or your family know the
symptoms of carbon monoxide poisoning: headache, dizziness, weakness, sleepiness, nausea, vomiting, and
confusion. Carbon monoxide reduces the blood’s ability to carry oxygen. Low blood oxygen levels can result in
loss of consciousness and death.
Do not burn with insufficient combustion air. A periodic check is recommended to ensure proper combustion air
is admitted to the combustion chamber. Setting the proper combustion air is achieved by adjusting the slider
damper located on the left side of the stove.
When installing the stove in a mobile home, it must be electrically grounded to the steel chassis of the home and
bolted to the floor. Make sure that the structural integrity of the home is maintained and all construction meets
local building codes.
Consider all large air moving devices when installing your unit and provide room air accordingly. NOTE: Extractor
fans when operating in the same room or space as the appliance, may cause problems. Limited air for combustion
may result in poor performance, smoking and other side effects of poor combustion.
Soot or creosote may accumulate when the stove is operated under incorrect conditions such as an extremely
rich burn (black tipped, lazy orange flames).
Be sure to maintain the structural integrity of your home when passing a vent through walls, ceilings, or roofs.
It is recommended that the unit be secured into its position in order to avoid any displacement. This appliance
must be installed on a floor with an adequate load bearing capacity. If an existing construction doesn’t meet
these prerequisite, suitable measures (e.g. load distributing plate) shall be taken to achieve it.
FRESH AIR: Outside Fresh Air connection is optional. Fresh Air must be connected to all units installed in Mobile
Homes and Air Tight Homes (R2000) or where required by local codes.
If you have any questions with regards to your stove or the above-mentioned information, please feel free to
contact your local dealer for further clarification and comments.

4
Introduction
emISSIonS anD effIcIency - evolutIon:
WARNING: This pellet heater needs periodic inspection and repair for proper operation. It is against
federal regulations to operate this pellet heater in a manner inconsistent with operating instructions
in this manual.
WARNING: This pellet heater has a manufacturer set minimum low burn rate that must not be
altered. It is against federal regulations to alter this setting or otherwise operate this pellet heater in
a manner inconsistent with operating instructions in this manual.
Rates: This manual describes the installation and operation of the Enviro P4 Pellet heater. This heater
meets the 2015 U.S. Environmental Protection Agency’s pellet emission limits for pellet emission
limits sold after May 15, 2015. Under specic test conditions this heater has been shown to deliver
heat at rates ranging from 8,200-23,000 Btu/hr.

5
Introduction
Safety WarnIngS anD recommenDatIonS:
Caution: Do not connect to any air distribution duct or system. Do not burn garbage or flammable fluids
such as gasoline, naphtha or engine oil. Unit hot while in operation. Keep children, clothing and furniture
away. Contact may cause skin burns.
Warning: Parts of the appliance, especially the external surfaces, will be hot to touch when in operation and
due care will need to be taken. Never place wood, paper, furniture, drapes or other combustible materials within
80cm (31½”) of the front of the unit, 20cm (7⅞”) from each side, and 10cm (4”) from the back of the unit. Do
not let children or pets touch it when it is hot.
To prevent the possibility of a fire, ensure that the appliance is properly installed by adhering to the installation
instructions. An ENVIRO dealer will be happy to assist you in obtaining information with regards to your local
building codes and installation restrictions.
FIRE EXTINGUISHER AND SMOKE DETECTION: All homes with a pellet burning stove should have at least
one re extinguisher in a central location known to all in the household. Smoke detectors and carbon monoxide
detectors should be installed and maintained in the room containing the stove. If it sounds the alarm, correct the
cause but do not deactivate. You may choose to relocate the smoke detection devise within the room; DO NOT
REMOVE THE SMOKE OR CARBON MONOXIDE DETECTORS FROM THE ROOM.
CHIMNEY OR RUN AWAY FIRE: Call local fire department (or dial 911). Close the draft fully. Examine the flue
pipes, chimney, attic, and roof of the house, to see if any part has become hot enough to catch fire. If necessary,
spray with fire extinguisher or water from the garden hose. IMPORTANT: Do not operate the stove again until
you are certain the chimney and its lining have not been damaged.
FUEL: This pellet stove is designed and approved to only burn wood pellet fuel with up to 3% ash content. Dirty
fuel will adversely affect the operation and performance of the unit and may void the warranty. Check with your
dealer for fuel recommendations.
THE USE OF CORD WOOD IS PROHIBITED BY LAW.
SOOT and FLYASH: Formation and Need for Removal - The products of combustion will contain small particles
of flyash. The flyash will collect in the exhaust venting system and restrict the flow of flue gases. Incomplete
combustion, such as occurs during startup, shutdown, or incorrect operation of the room heater will lead to some
soot formation which will collect in the exhaust venting system. The exhaust venting system should be inspected
at least once every year to determine if cleaning is necessary.
CREOSOTE: When wood is slowly burned it produces tar and other organic vapours and these combine with
expelled moisture to form creosote. The creosote vapours condense in the relatively cool chimney flue associated
with a slow burning fire. As a result, creosote residue accumulates on the flue lining. When ignited this creosote
can result in an extremely hot chimney fire.
CLEANING: There will be some build up of fly ash and small amounts of creosote in the exhaust. This will vary
due to the ash content of the fuel used and the operation of the stove. It is advisable to inspect and clean the
exhaust vent semi-annually or every two tons of pellets.
ASHES: Disposed ashes should be placed in a metal container with a tight fitting lid. The closed container of
ashes should be on a non-combustible floor on the ground, well away from all combustible materials pending
final disposal. If the ashes are disposed of by burial in soil or otherwise locally dispensed, they should be retained
in the closed container until all cinders have been thoroughly cooled.

6
ELECTRICAL: The use of a surge protected power bar is recommended. The unit must be grounded.
The grounded electrical cord should be connected to a standard 110-120 volts, nominal average 2.0 Amps (4.1
Amps peak), 60 hertz electrical outlet and also must be accessible. Ensure the polarity to the outlet the unit will
be plugged into is correct as incorrect polarity can affect the unit’s operation. If this power cord should become
damaged, a replacement power cord must be purchased from the manufacturer or a qualified ENVIRO dealer. Be
careful that the electrical cord is not trapped under the appliance and that it is clear of any hot surfaces or sharp
edges. This unit’s maximum power requirement is 184 watts (600 watts peak).
GLASS: Do not abuse the glass by striking or slamming the door. Do not attempt to operate the stove with
broken glass. The stove uses ceramic glass. Replacement glass must be purchased from an ENVIRO dealer. Do
not attempt to open the door and clean the glass while the unit is in operation or if glass is hot. To clean the
glass, use a soft cotton cloth and mild window cleaner, gas or wood stove glass cleaner, or take a damp paper
towel and dip into the fly ash. This is a very mild abrasive and will not damage the glass.
FLAMMABLE LIQUIDS: Never use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter fluid, or
similar liquids to start or “freshen up” a fire in the heater. Keep all such liquids well away from the heater while
it is in use.
SMOKE DETECTOR: Smoke detectors should be installed and maintained in the structure when installing and
operating a pellet burning appliance.
OPERATION: The ash pan and door must be closed securely for proper and safe operation of the pellet stove.
Also ensure all gaskets on the door are checked and replaced when necessary.
KEEP ASH PAN FREE OF RAW FUEL.
Do not place unburned fuel or new fuel in ash pan. A fire in the ash pan may occur.
INSTALLATION: Be sure to maintain the structural integrity of your home when passing a vent through walls,
ceilings, or roofs. It is recommended that the unit be secured into its position in order to avoid any displacement.
DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST VENTING SYSTEM OF THIS UNIT.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
FRESH AIR: Outside Fresh Air connection is optional. Must be connected to all units installed in Mobile and “Air
Tight Homes” (R2000) or where required by local codes. Consider all large air moving devices when installing
your unit and provide fresh air accordingly. Limited air for combustion may result in poor performance, smoking
and other side effects of poor combustion.
If you have any questions with regards to your stove or the above-mentioned information, please feel free to
contact your local dealer for further clarification and comments.
SINCE SHERWOOD INDUSTRIES LTD. HAS NO CONTROL OVER THE INSTALLATION OF YOUR
STOVE, SHERWOOD INDUSTRIES LTD. GRANTS NO WARRANTY IMPLIED OR STATED FOR THE
INSTALLATION OR MAINTENANCE OF YOUR STOVE. THEREFORE, SHERWOOD INDUSTRIES LTD.
ASSUMES NO RESPONSIBILITY FOR ANY CONSEQUENTIAL DAMAGE(S).
SAVE THIS INSTRUCTION MANUAL FOR FUTURE REFERENCE
Introduction

7
Introduction
ratIng label locatIon:
The rating label is located on the back of the ash pan access cover.
pellet QualIty:
Pellet quality is important, please read the following:
Your Enviro pellet stove has been designed to burn wood pellets only. Do not use any other type of
fuel, as this will void any warranties stated in this manual.
The performance of your pellet stove is greatly affected by the type and quality of wood pellets
being burned. As the heat output of various quality wood pellets differs, so will the performance
and heat output of the pellet stove.
CAUTION: It is important to select and use only pellets that are dry and free of dirt or any impurities such as
high salt content. Dirty fuel will adversely affect the operation and performance of the unit and will void the
warranty. Pellet Fuel Industries (P. F. I.) has established standards for wood pellet manufacturers. We recommend
the use of pellets that meet or exceed these standards. Ask your dealer for a recommended pellet type.
P. F. I. PELLET STANDARDS:
Fines (fine particles)......1% maximum through a ⅛” screen
Bulk Density..................40 pound per cubic foot minimum
Size..............................¼” to 5/16” diameter ½ – 1½” long maximum
Ash Content..................1% maximum (Premium grade)
..................3% maximum (Standard grade)
Moisture Content...........8% maximum
Heat Content.................approximately 8200 BTU per pound minimum
ASH: The ash content of the fuel and operation of your stove will directly determine the frequency of cleaning.
The use of high ash fuels may result in the stove needing to be cleaned daily. A low ash fuel may allow longer
intervals between cleaning.
CLINKERING: [clinkers are silica (sand) or other impurities in the fuel that will form a hard mass during the
burning process]. This hard mass will block the air flow through the Burn Pot Liner and affect the performance
of the stove. Any fuel, even approved types, may tend to clinker. Check the Burn-Pot Liner daily to ensure
that the holes are not blocked with clinkers. If they become blocked, remove the liner (when the unit is cold)
and clean/scrape the clinkers out. Clean the holes with a small pointed object if required. Refer to the section
Routine Cleaning and Maintenance.
PELLET FEED RATES: Due to different fuel densities and sizes, pellet feed rates may vary. This may require
an adjustment to the slider damper setting or to the auger feed trim setting on low.
Since Sherwood Industries Ltd. has no control over the quality of pellets that you use, we assume no liability for
your choice in wood pellets.
Store pellets in a dry area at least 36” (1 m) away from the pellet stove.

8
Installation
DecIDIng Where to locate your pellet applIance:
1. Check the “Clearances to Combustibles” section for proper spacing.
2. Do not obtain combustion air from an attic, garage or any unventilated space.
Combustion air may be obtained from a ventilated crawlspace.
3. Do not install the stove in a bedroom.
4. You can vent the stove through an exterior wall behind the unit or connect it to an
existing masonry or metal wood stove chimney (must be lined if the chimney is over
6” (15 cm) diameter, or over 28 inches² (180 cm²) cross sectional area). An interior
vent can be used with approved pipe passing through the ceiling and roof.
5. Locate the stove in a large and open room that is centrally located in the house. This
will optimize heat circulation.
6. The power cord is 8 feet (2.43 m) long and may require a grounded extension cord to
reach the nearest electrical outlet.
7. Stove must sit on a non-combustible pad that extends six inches in front of the door
or the included hearth pad (50-3119).
unpackIng anD removIng pellet Stove from pallet
1. Start by removing the crating and unit bag, you will need a pry bar and hammer to remove the crating. A
sawzall can be used to cut the staples as well.
2. Loosen six screws securing Back Grill, once loose slide downwards and
remove.
3. Remove the six T-20 screws that fasten each cabinet side to the stove.
See Figure 1.
4. Remove the 2 lag bolts on each side that hold the stove to the pallet.
See Figure 2.
5. Remove the 1/4” bolts that secure the shipping brackets to the stove.
See Figure 3.
Figure 1: Cabinet Side
Removal
Figure 2: Shipping Bracket
Removal
A
A
Figure 3: Shipping Bracket
Removal

9
Installation
aSSembly
1. First install the hearth pad if you plan on using it.
You will need to install the Hearth Pad Mounting
Tabs before installing the Hearth Pad. The Mounting
Tabs are installed by screwing one #8-32 T-20 screw
throught the Hearth Pad and into each Mounting Tab
(there are three total). See Figure 4a. You may have
to unscrew feet to raise unit up. Tilt the unit so it
is balancing on the back feet, slide the hearth pad
under the unit while making sure the side mounting
tabs are on the outside of the base flange. Once
holes are aligned secure with provided T-20 thread
rolling screws. See Figure 4b.
DATE: 24/06/2015 BY
SHERWOOD INDUSTRIES LTD.
INTERNAL ASSEMBLY MANUAL
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
1 of 2
SHEET:
P4 PROTO R01
STOVE:
UPDATED: ----/--/-- BY
--
REVISION:
0.0
DATE: 24/06/2015 BY
SHERWOOD INDUSTRIES LTD.
INTERNAL ASSEMBLY MANUAL
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
1 of 2
SHEET:
P4 PROTO R01
STOVE:
UPDATED: ----/--/-- BY
--
REVISION:
0.0
DATE: 24/06/2015 BY
SHERWOOD INDUSTRIES LTD.
INTERNAL ASSEMBLY MANUAL
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
1 of 2
SHEET:
P4 PROTO R01
STOVE:
UPDATED: ----/--/-- BY
--
REVISION:
0.0
2. Next install the Cabinet Sides. There are six
screws for mounting each cabinet side. Start by
installing screws at front top of the panels, Do not
fully tighten screws. Now get the back top screws
started. Now install the rest of the screws and
tighten them down. See Figure 5.
3. Now Install Ash Shelf and Louvers. Ash Shelf is
mounted using two T-20 thread roller screws. The
Louvers are installed by inserting into slots cut into
louver mounting brackets located above the door.
If properly aligned the louvers should catch on the
bracket tabs and sit at a 15 degree angle.
Figure 5: Cabinet Side Install
Figure 6: Louver and Ash Shelf Install
Figure 4b: Hearth Pad Install
ITEM NO. PART NUMBER DESCRIPTION QTY.
1
12-14846-HP HEARTH PAD
1
2 12-14967-HP HEARTH PAD MOUNTING TAB 3
3
C-10187
SCREW 8-32 X .375IN PN HD TRX 3
SA-900760 P4 HEARTH PAD
DATE: 13/07/2015 BY
SHERWOOD INDUSTRIES LTD.
INTERNAL ASSEMBLY MANUAL
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
1 of 1
SHEET:
SA-900760 P4 Hearth Pad
STOVE:
UPDATED: ----/--/-- BY
--
REVISION:
0.0
Figure 4a: Hearth Pad Tab Install

10
Installation
clearanceS to combuStIbleS:
IMPORTANT: The P4 must have a Hearth Pad when installing the unit on a combustible floor. The included
hearth pad meet all the requirement of a proper hearth pad. If you do not use the included hearth pad a certified
non combustible Hearth Pad with a minimum R Value of at least 0.84 must be placed underneath the unit and
extend 7.25 inches in front of the unit measured from the glass. If the P4 is installed on carpet the use of a solid
non combustible Hearth Pad must be used under leveling legs.
These dimensions are minimum clearances but it is
recommendedthat you ensuresufficientroom for servicing,
routine cleaning and maintenance.
A. Side wall to unit 6 inches (20 cm)
B. Back wall to unit 8 inches (20 cm)
C. Back wall to Chimney Connector 5 inches (13 cm)
D. Corner to unit 3 inches (7.5 cm)
E. Glass to Hearth Pad 7.25 inches (18.5 cm)
48in
(122 cm)
48in
(122 cm)
48in
(122 cm)
The unit may be installed in an alcove if desired.
These minimum clearances to combustibles must
be maintained at all times. Be sure to leave room
for servicing, routine cleaning, and maintenance.
These are inside dimensions.
Minimum Alcove Width 48 inches (122 cm)
Minimum Alcove Height 48 inches (122 cm)
Minimum Alcove Depth 48 inches (122 cm)
alcove clearanceS:
Figure 7: Minimum Install Clearances
Figure 8: Minimum Alcove Clearances
A
E
D
C
B

11
Installation
vent termInatIon reQuIrementS:
IT IS RECOMMENDED THAT YOUR PELLET STOVE BE INSTALLED BY AN AUTHORIZED DEALER/INSTALLER.
Figure 9: Use in conjunction with Table 1 for allowable exterior vent termination
locations.
Table 1: Use in conjunction with Figure 6 for allowable exterior vent termination locations.
Air Supply Inlet Gas Meter Restriction Zone
(Termination not allowed)
Termination Cap
G
G
Opens
Opens
Opens
DF
B
B
AI
H
KG
G
L
C
E
the inlet elevation. It is recommended that at least five feet of vertical pipe be installed outside when the appliance is
vented directly through a wall, to create some natural draft to prevent the possibility of smoke or odor during appliance
shut down or power failure. This will keep exhaust from causing a nuisance or hazard from exposing people or shrubs to
high temperatures. In any case, the safest and preferred venting method is to extend the vent through the roof vertically.
4. Distance from the bottom of the termination and grade is 12” (30 cm) minimum. This is conditional upon the plants and
nature of grade surface. The exhaust gases are hot enough to ignite grass, plants and shrubs located in the vicinity of
termination. The grade surface must not be lawn.
5. If the unit is incorrectly vented or the air to fuel mixture is out of balance, a slight discoloration of the exterior of the
house might occur. Since these factors are beyond the control of Sherwood Industries Ltd, we grant no guarantee against
such incidents.
NOTE: Venting terminals shall not be recessed into walls or siding.
Letter Minimum Clearance Description
A 24 in (61 cm) Above grass, top of plants, wood, or any other combustible materials.
B 48 in (122 cm) Beside/below any door or window that may be opened. (18” (46 cm) if outside
fresh air installed.)
C 12 in (30 cm) Above any door or window that may be opened. (9” (23 cm) if outside fresh air
installed.)
D 24 in (61 cm) To any adjacent building, fences and protruding parts of the structure.
E 24 in (61 cm) Below any eave or roof overhang
F 12 in (30 cm) To outside corner.
G 12 in (30 cm) To inside corner, combustible wall (vertical and horizontal terminations).
H 3 ft (91 cm) within a height
of 15 ft (4.5 m) above the
meter/regulator assembly
To each side of center line extended above natural gas or propane meter/
regulator assembly or mechanical vent.
I 3 ft (91 cm) From any forced air intake of other appliance
J 12 in (30 cm) Clearance to non-mechanical air supply inlet to building, or the combustion air
inlet to any appliance.
K 24 in (61 cm) Clearance above roof line for vertical terminations.
L 7 ft (2.13 m) Clearance above paved sidewalk or paved driveway located on public property.
1. Do not terminate the vent in any
enclosed or semi-enclosed areas
such as a carport, garage, attic,
crawlspace, narrow walkway,
closely fenced area, under a sun
deck or porch, or any location
that can build up a concentration
of fumes such as stairwells,
covered breezeway, etc.
2. Vent surfaces can become
hot enough to cause burns
if touched by children. Non-
combustible shielding or guards
may be required.
3. Termination must exhaust above

12
exhauSt anD Intake locatIonS:
Figure 11: P4 Inlet and Outlet Location.
EXHAUST
Base of unit to center of flue 13.044 in (331 mm)
Center of unit to center of flue 2.842 in (72.1 mm)
[at center of unit]
FRESH AIR INTAKE
Base of unit to center of intake 11.045 in (280.5 mm)
Center of unit to center of intake 4.144 in (53 mm)
Outside fresh air is mandatory when installing this
unit in airtight homes (R2000) and mobile homes.
A Fresh-air intake is strongly recommended for all
installations. Failure to install a fresh air intake may
result in improper combustion as well as the unit smoking
during power failures.
Whenconnecting toan outside fresh air source, do not use
plastic or combustible pipe. A 2” minimum (51 mm) ID
(inside diameter) steel, aluminum or copper pipe should
be used. It is recommended, when you are installing a
fresh air system, to keep the number of bends in the pipe
to a minimum.
Installation
outSIDe freSh aIr connectIon:
2" ID
(51 mm)
Optional
Elbow
Outside
Wall
Figure 10: Outside Air Connection.
11.045in
(28.05 cm)
13.044in
(33.13cm)
4.144in
(10.53 cm)
2.842in
(7.21 cm)
IMPORTANT: When attaching the exhaust venting
system to the unit or when joining vent sections
three screws must be used at each joint. If vented
horizontally, joints shall be made gas tight with
aluminum foil duct tape.

13
Figure 13: Corner Installation.
corner through Wall InStallatIon:
Installation
mobIle home InStallatIon:
● Secure the heater to the floor using the two
holes in the pedestal.
● Ensure the unit is electrically grounded to
the chassis of your home (permanently).
● Do not install in a room people sleep in.
● Outside fresh air is mandatory. Secure
outside air connections directly to fresh air
intake pipe and secure with three screws
evenly spaced.
CAUTION:
Figure 12: Mobile home installation.
ENVIRO P4
1/4” Lag Bolts
Securely Fastened Ground Wire Directly
to Metal Chassis
Hearth Pad
Flooring
Steel Frame
3" (75mm)
3"
(75mm)
Wall thimble
manufactured
by pellet vent
manufacturer.
Minimum clearances must be maintained
for a corner installation as shown in
figure 13.
THE STRUCTURAL INTEGRITY OF
THE MANUFACTURED HOME FLOOR,
WALL AND CEILING/ROOF MUST BE
MAINTAINED.

14
Installation
horIzontal exhauSt through Wall InStallatIon:
Vent installation: install vent at clearances specified by the vent manufacturer.
A chimney connector shall not pass through an attic or roof space, closet or similar concealed spaces, or a floor,
or ceiling. Where passage through a wall or partition of combustible construction is desired, the installation shall
conform to CAN/CSA-B365 Installation Code for Solid-Fuel-Burning Appliances and Equipment. Only use venting
of L or PL type with an inside diameter of 3 or 4 inches (7.6 or 10.1 cm).
1. Choose a location for your stove that
meets the requirements stated in this
manual and allows installation with the
least amount of interference to house
framing, plumbing, wiring, etc.
2. Install a non-combustible hearth pad
(where necessary).
3. Place the appliance 15” (37.5 cm) away
from the wall. If the stove is to be set
on a hearth pad, set the unit on it, and
adjust the leveling legs.
4. Locate the center of the exhaust pipe
on the stove. Extend that line to the
wall. Once you have located the center
point on the wall, refer to pellet vent
manufacturer installation instructions
for correct hole size and clearance to
combustibles.
5. Install the wall thimble as per the
instructions written on the thimble.
Maintain an effective vapour barrier in
accordance with local building codes.
6. Install a length of 3” (75 mm) or 4” (100
mm) vent pipe into the wall thimble.
The pipe should install easily into the
thimble.
7. Connect the exhaust vent pipe to the
exhaust pipe on the stove. Seal the
connection with high temperature
silicone.
8. Push the stove straight back, leaving a
minimum of 4” (10 cm) clearance from
the back of the stove to the wall. Seal
the vent pipe to the thimble with high
temperature silicone.
9. The pipe must extend at least 12”
(30 cm) away from the building. If
necessary, bring another length of pipe
(PL type) to the outside of the home to
Figure 14: Straight through wall Installation.
Figure 15: Venting to use with straight through wall Installation.
Non-combustible
floor protection. Existing floor
(combustible)
6.5"
(16.5 cm)
8"
(20 cm)
Wall
thimble
45°
elbow
12"
(30.5 cm)
Exhaust Tube
3" (75mm) or 4" (100mm) "PL" or "L" vent
Wall Thimble
45° Elbow with screen or
Termination Cap
High Temperature RTV
Silicone Required
Fresh Air Intake Tube
connect to the first section. Do not forget to place high temperature silicone around the pipe that passes
through the thimble.

15
Figure 16: Venting horizontally with rise. Figure 17: Venting with concrete wall behind unit .
Installation
10. Install a vertical pipe, or if all requirements for direct venting are met, install vent termination. The stainless
steel cap termination manufactured by the vent manufacturer is recommended. However, when the vent
terminates several feet above ground level and there are no trees, plants, etc. within several feet, a 45°
elbow can be used as termination. The elbow must be turned down to prevent rain from entering.
NOTE:
• It is recommended that horizontal through wall installations have 3 to 5 feet (91 to 152 cm) of vertical pipe in
the system to help naturally draft the unit in the event of extreme weather or a power outage.
• Some horizontal through wall installations may require a “T” and 3 to 5 feet (91 to 152 cm) of vertical pipe
outside the building to help draft the unit. This may be required if a proper burn cannot be maintained, after
the stove has been tested and the airflow set. This is due to the back pressure in the exhaust caused by airflow
around the structure.
• Follow vent manufacturer guidelines for installation of venting. High temp sealant must be used when connecting
vent pipe to the unit’s starter pipe. Improper seals at the vent joints may cause combustion by-products to leak
into the room where installed - seal as required.
through Wall vertIcal rISe horIzontal termInatIon InStallatIon - freeStanDIng:
A termination cap is always recommended for this type of install but a stainless steel termination hood or a 45°
elbow may be used in place of the cap.
Figure 16 is the recommended installation set up, venting length is negligible.
Figure 17 is the installation to use if there is a concrete or retaining wall in line with exhaust vent on a pellet
stove. The termination must be 12” (30 cm) from the outside wall and 12” (30 cm) above the ground.
Wall framing
Wall thimble
Termination cap
Vertical section of vent pipe
Horizontal frame for thimble
Clean out tee
90° elbow
Wall strap
Wall framing
Wall thimble
Termination cap
Vertical section
of vent pipe
Horizontal frame
for thimble
90° elbow
Concrete Wall
Clean out tee

16
Figure 18: Inside Vertical Installation.
1. Choose a stove location that is ideal. See the
section “DeciDing Where to Locate your PeLLet
aPPLiance.”
2. Place a non-combustible hearth pad where
necessary.
3. Place the unit on the hearth pad (if installed on
a combustible surface) and space the unit in
a manner so when the pellet vent is installed
vertically, it will be 3” (7.5 cm) away from a
combustible wall.
4. Install the tee with clean out.
5. Install the pellet vent upward from there. When
you reach the ceiling, make sure that the vent
goes through the ceiling fire stop. Maintain a 3”
(7.5 cm) distance to combustibles and keep attic
insulation away from the vent pipe. Maintain an
effective vapor barrier.
6. Finally, extend the pellet vent to go through the
roof flashing.
7. Ensure that the rain cap is approximately 24”
(600 mm) above the roof.
To accomplish a outside vertical pipe installation, follow
steps 1 through 5 in the “insiDe VerticaL instaLLations -
FreestanDing”section and then finish it by performing
the following (refer to Figure 19).
1. Install a tee with clean out on the outside of the
house.
2. Install PL vent upward from the tee. Make sure
that you install support brackets to keep the vent
straight and secure.
3. Install ceiling thimble and secure the flashing as you
go through the roof.
4. Ensure that the rain cap is approximately 24” (600
mm) above the roof.
Installation
InSIDe vertIcal InStallatIonS:
Figure 19: Outside Vertical Installation.
outSIDe vertIcal InStallatIonS:
2 ft
(600 mm)
Rain Cap (ensure cap is
at least 3ft above the
roof at the lowest point)
Roof Flashing
Roof Rafter
Fire Stop with
Support Collar
Ceiling Joist
Vertical Vent Pipe
Clean Out Tee with
Pipe Adapter
NOTE:All vent sections must
maintain 3 inches (7.5 cm)
clearances to combustibles.
Rain cap
Flashing
24"
(61 cm)
4"
(10 cm)
Tee with
cleanout
3" (7.5 cm)
Clearance
Support
bracket
Type "PL"
vent
Figure 21: Freestanding hearth mount installation overview.

17
Installation
hearth mount InStallatIon:
Figure 21: Freestanding hearth mount installation overview.
Refer to Figures 20 and 21.
1. Install the hearth pad.
2. Lock the fireplace damper in the open
position.
3. Install a positive flue connector at the
fireplace dampers or seal the chimney
at the top.
4. Connect a tee to the exhaust pipe.
5. Install flexible stainless steel liner or
listed pellet vent to the top of the
chimney.
Figure 20: Freestanding hearth mount installation.
Min 7.25" (185 mm)
Optional Hearth
or Other
Floor Protection
Combustible FloorMasonry Fireplace
Rain Cap
Steel Plate or Flashing
Flexible or
Rigid 6" Stainless
Steel Liner
10" (25.4 cm) Mantel
Minimum 8" (20 cm)
from top of stove
Damper Removed
or Fastened Open
Clean-out tee
Flue
Connector
Rain cap
Storm collar
Seal plate (cover plate)
Existing masonry flue
Vent pipe (single wall
stainless flex pipe or
solid PL vent)
Fireplace damper
location
Clean out tee
Existing fireplace
Flexible vent connector
(use this 5 foot [152cm]
section of pipe to vent
past fireplace damper or
small shelf)

18
Installation
thermoStat InStallatIon:
1. Install the wall thermostat in a location that
is not to close too the unit but will effectively
heat the desired area.
2. The Right Cabinet Side will need to be
removed to access the Control Board. There
are six T-20 screws that need to be removed
on the Right Cabinet Side before it can be
removed.
Remove jumper
wire and install
thermostat wires here.
Figure 34: Thermostat wire placement.
DATE: 30/06/2015 BY
SHERWOOD INDUSTRIES LTD.
INTERNAL ASSEMBLY MANUAL
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
1 of 2
SHEET:
P4 PROTO R01
STOVE:
UPDATED: ----/--/-- BY
--
REVISION:
0.0
A
DETAIL A
SCALE 1 : 4
DATE: 30/06/2015 BY
SHERWOOD INDUSTRIES LTD.
INTERNAL ASSEMBLY MANUAL
STATION:
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
STEP:
2 of 2
SHEET:
P4 PROTO R01
STOVE:
UPDATED: ----/--/-- BY
--
3. Once the side has been removed you can remove
three T-20 screws securing the Control Board Cover.
4. Once the Control Board is out, you can easily
access the circuit board and will be able to attach
the thermostat wires to the thermostat connection
shown in Figure 24.
5. Use a small flat head screwdriver to tighten and
secure the wires. The wires should be run through
the plastic bushing located at the back of the stove,
opposite side from the power.
6. Reverse steps 1-5.
Figure 22: Cabinet Removal
Figure 23: Control Board Cover Removal.

19
Specifications
DImenSIonS anD SpecIfIcatIonS:
Figure 25: Dimensions of P4.
Weight (with full hopper): 275 lb (125 Kg)
Hopper Capacity: up to 82 lb (37 Kg)
Voltage: 110 - 120 V
Max Current: 4.1 Amps
Consumption on High: 3.1 lb/hr (1.4 Kg/hr)*
Consumption on Low: 1.3 lb/hr (0.6 Kg/hr)*
(Note: Consumption will vary with the type of
fuel used.)
22.485
36.513
26.254
21.978
20.000
6.299
21.297
25.348
DATE: 23/06/2015 BY
SHERWOOD INDUSTRIES LTD.
INTERNAL ASSEMBLY MANUAL
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
1 of 1
SHEET:
P4
STOVE:
UPDATED: ----/--/-- BY
--
REVISION:
0.0

20
Operating Instructions
control boarD functIonS:
1. POWER BUTTON: This is the green button with the power symbol, it is used to turn
the unit on and off. When the power is on and the blue LED beside the button will be
illuminated. The LED will flash during the start-up cycle. Once start-up cycle is complete
the power LED will stay on.
2. AUTO BUTTON: Located below the Power button, when pressed this activates Auto or
“Comfort” mode. LED beside button will be illuminated when active.
3. THERMOSTAT BUTTON: Located below the Auto Button. This is for external thermostat
control. LED beside button will be illuminated when active.
4. ARROW BUTTONS: The Arrow Buttons are used to adjust heat level and trim settings.
START-UP: When the unit is turned on it will go into a start-up cycle while trying to light a
fire. During start-up you have no control over the settings. The Power LED will flash until
start-up is complete. You can adjust heat levels or toggle the different modes during start-
up but these adjustments will not come into affect until the start-up cycle is complete.
MANUAL MODE: Once the start-up cycle is completed you will be in either Manual mode or
Auto mode. When in Manual mode the Power LED is illuminated and AUTO LED is not. Use
the Arrow buttons to adjust heat level from L1-L5.
AUTO MODE: Press the Auto button to activate Auto or “Comfort” mode. When activated the
Power and Auto LED’s will be illuminated. Use the Arrow buttons to adjust from C1-C9.
Each setting corresponds to a different temperature set point. The stove will automatically
adjust to hold this temperature. As the room temperature gets close to the set point the
fire will decrease in size. If room temperature is above the set point for a certain amount
of time the stove will shut down and go into Suspend mode.
SUSPEND MODE: Once a stove has gone into Suspend mode the fire will go out. This means
the room has heated up beyond the Auto set point. Once temperature in the room drops
below the Auto set point the stove start back up and run until the room gets
to hot once again. When in suspend mode the Auto LED will flash.
THERMOSTAT MODE: This can only be used in Manual mode, and is for external
thermostat control. A external thermostat can be wiring to the main control board. When activated the LED beside the
Thermostat Button will be illuminated.
FEED/COMBUSTION TRIM: To adjust the Feed Trim you must be in Manual mode heat level 1. Press the hidden button
located under the down arrow. The Display will then change from P (Program) to A (Auger) to C (Combustion) with a
two second delay between changes. When the display shows an A use the arrows to adjust the feed trim. To adjust the
combustion fan trim wait until the display shows C then use the arrows to adjust.
SERVICE INDICATOR: If you see the “S1” on the LED display this is a maintenance recommended indicator. The “S1”
will come on when your stove has run for so many hours. It is recommended that you contact your local dealer for
component inspection and servicing. Pellet stoves require regular maintenance to keep running efficiently.
Auto
Figure 26: Circuit Board
Control Panel Decal.
automatIc Safety featureS of your pellet Stove:
A. The stove will shut off if the fire unexpectedly goes out, once exhaust temperature drops below 120°F (49°C), you will
see an E3 code on the LED display.
B. The stove has a high temperature safety switch. If the temperature on the hopper reaches 200°F (93°C), the auger
will automatically stop and the stove will shut down. The LED display will show an E4 error code, see Troubleshooting
section. If this happens, call your local dealer to reset the 200°F (93°C) high limit switch. ALSO FIND THE REASONS
WHY THE UNIT OVERHEATED. This code can also be cause by leaving the hopper lid open, there is a magnetic safety
switch.
C) The unit is equipped with a vacuum switch to monitor the venting pressure; if it becomes blocked the vacuum switch
will turn off the auger and there will be an E2 error code on The LED Display.