Martin MDV12P User manual

Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS:
* Do not try to light any appliance.
* Do not touch any electrical switch; do not
use any phone in your building.
* Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
* If you cannot reach your gas supplier, call
the fire department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
This Appliance may be installed in an aftermarket,
permanently located, manufactured home (USA
only) or mobile home, where not prohibited by
local codes.
This appliance isonly for use with
the type of gas indicated on the
rating plate. This appliance isnot
convertible for use with other gases.
WARNING: If the information in these instructions
are not followed exactly, a fire or explosion may
result causing property damage, personal injury,
loss of life.
INSTALLER: Leave this manual with
the appliance.
CONSUMER: Retain this manual for
future reference.
OWNER’S INSTALLATION, SAFETY
AND OPERATIONS MANUAL
GRAVITY VENTED WALL FURNACE SERIES: MDV8P, MDV8N, MDV12P, MDV12VP,
MDV12N, MDV12VN, MDV20P, MDV20VP, MDV20N, MDV20VN
Your heater may differ from models shown.
We thank you for purchasing our quality and reliable MARTIN heater. If you require assistance or have
any questions about safety, installation, operation, require replacement parts, safety label or manual, please
contact our customer service:
Call us toll-free at 1-800-266-1414 Monday to Friday 8H AM to 17 H PM
Or email us at [e-mail] www.bismar.com
Bismar Inc., 9, de Montgolfier st., Boucherville, Qc, J4B 8C4
®
V1-6.2016
Conforms to ANSI STD Z21.86-2008
and certified to CSA STD 2.32-2008 (R2014), and CGA 2.17-M91 (R2009) 0544GH001S

Your MARTIN® heater is especially designed to provide maximum comfort to you and your home. Its large solid injected
aluminum front grill assures the optimum use of the generated heat in the ambient, maintains normal temperatures behind
the heater to avoid sticking of particles, which would soil the wall. You can feel safe with absolute security guaranteed by:
A flame failure safety, which cuts the gas supply in the event of the heater pilot extinguishing due to strong air currents
or momentary interruption of the supply of gas.
Its gas pressure regulator assures an optimum operational function, avoiding peak pressures in the gas supply
affecting normal combustion.
Its tight gas combustion chamber, totally enameled avoids gases which are caused by combustion to contaminate
the air and ensures a useful, long lasting working life.
•
•
•
A guarantee of long lasting comfort provided by this heater and its quality components, the high technology applied
in the process of fabrication and especially by the traditional vocation of MARTIN® to supply durable products for your
maximum comfort and satisfaction.
Install and use the heater with care. The installation must conform with local codes or in the absence
of local codes, use the latest edition of The National Fuel Gas Code ANSI Z223.1/NFPA 54 Natural
Gas and Propane Installation Code, CSA B149.1.
A manufactured home (USA only) or mobile home OEM installation must conform with the
Manufac-
tured Home Construction and Safety Standard, Title 24 CFR, Part 3280
, or, when such a standard is
not applicable, the Standard for
Manufactured Home Installation, ANSI Z225.1
, or Standard for
Gas
Equipped recreational Vehicles and Mobile Housing, CSA Z240.4.
2
GAS SPECIFICATIONS
8,000 BTU/hr 11,000 BTU/hr 20,000 BTU/hr
2,900 BTU/hr 3,600 BTU/hr 6,000 BTU/hr
L.P. 13” W.C.
NAT. 10.6” W.C.
L.P. 13” W.C.
NAT. 10.6” W.C.
L.P. 11” W.C.
NAT. 7” W.C.
L.P. 11” W.C.
NAT. 7” W.C.
L.P. 11” W.C.
NAT. 7” W.C.
5.8” W.C. 5.2” W.C.
10.5” W.C.
6,400 BTU/hr 8,800 BTU/hr 16,000 BTU/hr
MDV8 MDV12 MDV20
Maximum Input
Minimum Input
Maximum Inlet Pressure
Minimum permissible gas supply
pressure for purpose of input
adjustments.
Manifold Pressure (Propane gas)
Manifold Pressure (Natural gas)
Thermal Output Capacity
6” W.C.
10.8” W.C. 10.8” W.C.
L.P. 13” W.C.
NAT. 10.6” W.C
HEATER MODEL
INTRODUCTION
LOCAL CODES

3
SAFETY RULES
1. Due to high temperatures, the appliance should be located out of traffic and away from furniture and
draperies.
2. Children and adults should be alerted to the hazards of high surface temperatures and should stay away
to avoid burns or clothing ignition.
3. Young children should be carefully supervised when they are in the same room as the appliance.
4. Clothing or other flammable material should not be placed on or near the appliance.
5. Any safety screen or guard removed for servicing an appliance must be replaced prior to operating the
appliance.
6. Installation and repair should be done by a qualified service person. The appliance should be inspected
before use and at least annually by a qualified service person. More frequent cleaning may be necessary
due to excessive lint from carpeting, bedding material, etc. It is imperative that control compartments,
burner and circulating air passageways of the appliance be kept clean.
7. WARNING: Do not operate appliance with the panel removed, cracked or broken. Replacement of the
panel should be done by a licensed or qualified service person.
8. Do not spray any aerosol near heater when functioning. Do not store pressurized containers near
appliance.
9. Do not touch the grill to avoid burning yourself.
10. Do not touch the gases outlet cap while heater is in operation to avoid burning yourself.
11. Avoid blocking air inlet and hot air outlet.
12. Do not spill water over the heater as it may cause corrosion.
13. Allow heater to thoroughly cool before servicing.
14. Input ratings are shown in BTU per hour and are rated for elevations up to 2,000 feet above sea level.
For elevations above 2,000 feet, input ratings should be reduced 4 percent for each 1,000 feet above
sea level. Refer to the National Fuel Gas Code.
15. The heater and its appliance main gas valve must be disconnected from the gas supply piping
system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
16. The appliance must be isolated from the gas supply piping system by closing its equipment shutoff
valve during any pressure testing of the gas supply piping system at test pressures equal to or less
than 1/2 psig (3.5 kPa).
17. This gas appliance must not be connected to a chimney flue serving a separate solid-fuel burning
appliance.
18. The installation must provide for adequate and unobstructed combustion and ventilation air.
19. The installation must provide adequate accessibility clearances for servicing.
20. The efficiency rating of this appliance is a product thermal efficiency rating determined under
continuous operating conditions and was determined independently of any installed system.
21. The minimum inlet gas supply is for the purpose of input adjustment.
22. Do not use this appliance if any part has been under water. Immediately call a qualified service
technician to inspect the appliance and to replace any part of the control system and any gas control
that has been under water.
.

4
MINIMUM CLEARANCES TO COMBUSTIBLES
Spacer:
MDV8: 2 cm (25/32 in)
MDV12/20: 3 cm (1-3/16 in)
61 cm (24 in)
15 cm (6 in)
Clearances to combustible surfaces:
Rear : MDV8: 2 cm (25/32 in)
MDV12/20: 3cm (1-3/16 in)
Sides : 15 cm (6 in)
Above : 61 cm (24 in)
From floor :
18 cm (7 in)
18 cm (7 in) to top of tile, carpeting, etc.

Ø 8 mm
(Ø 5/16”)
Ø 8 mm
(Ø 5/16”)
Ø 8 mm
(Ø 5/16”)
68 mm
(2-11/16”)
68 mm
(2-11/16”)
ART. 13844
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Gas inlet
3/8”NPT
300 mm (11-13/16”)
Ø230 mm (9-1/16”)
150mm (5-7/8”) 40mm
(1-9/16”)
112mm (4-7/16”)
180mm (7-1/8”)
Ø115mm
(Ø4-1/2”)
25mm (1”)
390mm (15-3/8”)
575mm (22-5/8”)
92mm (3-5/8”)92mm (3-5/8”)
92mm (3-5/8”)92mm (3-5/8”)
490mm (19-5/16”)
172 mm (6-3/4”)
Hole for
combustible
wall in both
indoor and
outdoor.
Floor level (Fold here)
5
The following diagrams serve as a reference for the installation of your heater with the ventilation provided
with the unit. The template that is provided with the heater should be used. In this case, fold it at the dotted
line 7” below the heater which indicates the floor level, and make it coinciding with the floor level as a
minimum clearance. Also take into consideration the other minimum distances shown. Then fix it to the wall
INSTALLATION INSTRUCTIONS
Model MDV8
with adhesive tape.

Ø 8 mm
(Ø 5/16”)
Ø 8 mm
(Ø 5/16”)
Ø 8 mm
(Ø 5/16”)
110mm
(4-5/16”)
110mm
(4-5/16”)
ART. 13012 V2
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roolfmorf
Gas inlet
3/8”NPT
380 mm (15”)
Ø230 mm (9-1/16”)
190mm (7-1/2”) 40mm
(1-9/16”)
112mm (4-7/16”)
180mm (7-1/8”)
Ø115mm
(Ø4-1/2”)
25mm (1”)
390mm (15-3/8”)
575mm (22-5/8”)
92mm (3-5/8”)92mm (3-5/8”)
92mm (3-5/8”)92mm (3-5/8”)
490mm (19-5/16”)
215mm (8-1/2”)
Hole for
combustible
wall in both
indoor and
outdoor.
Floor level (Fold here)
6
INSTALLATION INSTRUCTIONS
Model MDV12

Ø 8 mm
(Ø 5/16”)
Ø 8 mm
(Ø 5/16”)
Ø 8 mm
(Ø 5/16”)
245mm
(9-5/8”)
245mm
(9-5/8”)
Ø 8 mm
(Ø 5/16”)
Floor level (Fold here)
ecnatsidnuminiM
roolfmorf
Gas inlet
3/8”NPT
660 mm (26”)
Ø270 mm (10-5/8”)
300mm (11-13/16”)
110mm (4-5/16”) 390mm (15-3/8”)
40mm
(1-9/16”)
112mm (4-7/16”)
180mm (7-1/8”)
Ø160mm
(Ø4-1/2”)
25mm (1”)
390mm (15-3/8”)
118mm (4-5/8”) 118mm (4-5/8”)
118mm (4-5/8”)118mm (4-5/8”)
490mm (19-5/16”) 575mm (22-5/8”)
12mm (1/2”)
Hole for
combustible
wall in both
indoor and
outdoor.
ART. 13066 V2
7
INSTALLATION INSTRUCTIONS
Model MDV20

MDV8 - Total length of ventilation : wall thickness + 15.5 cm (6-3/32’’)
MDV12 & MDV20 - Total length of ventilation : wall thickness + 16.5 cm (6-1/2’’)
MDV12 / MDV20 : 5,5 cm (2-5/32’’)
MDV12 / MDV20 : 3,5 cm (1-3/8’’)
MDV8 : 4,5 cm (1-3/4’’)
MDV8 : 2,5 cm (1’’)
11 cm (4-5/16’’)
MDV8
Total length of rod:
Wall thickness + 14,7 cm (5-5/32’’)
MDV12/20
Total length of rod:
Wall thickness + 15,7 cm (6-3/16’’)
To heater
MDV8 - Total length of internal tube : wall thickness + 11 cm (4-5/16’’)
MDV12/20 - Total length of internal tube : wall thickness + 12 cm (4-3/4’’)
MDV8 - Total length of external tube : wall thickness + 13,5 cm (5-5/16’’)
MDV12/20 - Total length of external tube : wall thickness + 14,5 cm (5-11/16’’)
Thimble maximum length : 32 cm (12-5/8’’)
MDV12 : diameter 23 cm (9-1/16’’)
MDV20 : diameter 27 cm (10-5/8’’)
8
HEATER & VENTILATION INSTALLATION
The ventilation system consists of:
Take into consideration the area indicated for the gas connection.
1. Mark the 5/16” (8mm) mounting holes on wall.
For wooden walls use the wood screws provided
to mount heater to wall. Into drywall or where no
studs are available, drill and insert the anchor plugs
provided into mounting holes.
2. Mark the ventilation tube hole and the mounting
plate screws.
The ventilation must be rectilinear with a slight
downward sloap of 2 degrees towards the
exterior to avoid rain water infiltration.
3. Cut out ventilation opening in wall.
Install the indoor & outdoor mounting plates with
screws provided.
* MDV12 / MDV20 heaters only:
Assemble the wall thimble.
4. Prepare the rear spacers with mounting screws.
* The wallʼs thickness cannot be less than 4-1/2”
(11.5 cm) nor can it exceed 12-5/8” (32 cm).
Tube lengths and threaded mounting rod should
be trimmed to comply to the dimensions as shown
in figure 1.
1. Remove the front cover of the heater by removing
the control knob and the two (2) screws on the top
of the cover. To remove slide the front upwards.
2. After tubes have been cut to length, slide the
tubes and the rod into position on the heater
and adjust with the nut provided until you get a
compact unit. Slide the heater and ventilation
assembly through the hole in wall making sure
spacers are in place on mounting screws, until
the heater reaches the wall.
- For models MDV8 and MDV12, secure to the
wall with the three (3) screws and spacers.
- For model MDV20, secure to the wall with the
four (4) screws and spacers provided.
3. Check that hood protrudes the intended 4-5/16”
(11 cm) from the exterior wall.
4. Seal any imperfections between mounting plate wall and vent hood with putty, making sure that nothing falls inside the
hood as shown in figure 3 on next page.
Final Assembly
1x External tube (Air intake tube with enamel hood riveted), 1 x Internal tube (Outgoing flue gases)
1x Indoor mounting plate, 1x Outdoor mounting plate
1x Wall thimble (models MDV12 & MDV20 only), 1x Threaded mounting rod, 1x Adjusting nut
˃ Use the template provided with heater to mark wall mount installation and ventilation opening size.
Fig. 1

9
VENTILATION INSTALLATION continued
Minimum wall thickness:
4-1/2’’ (11.5 cm)
Maximum wall thickness:
12-5/8’’ (32 cm)
Fig. 2
Fig. 3
Fig. 4
IMPORTANT: The appliance’s vent cap should be at least 24 in. (61 cm) from any outside
adjacent or intersecting wall.
IMPORTANT: The appliance’s venting system should be inspected at least once a year and
cleaned if necessary.
IMPORTANT: THE VENT-AIR INTAKE SYSTEM MUST BE PROPERLY INSTALLED TO
INSURE PROPER AND SAFE OPERATION.

MDV20 66 cm (26’’)
MDV12 38 cm (15’’)
MDV8 30 cm (12’’)
57,5 cm (22-5/8’’)
Gas
connection
Mounting Details
Gas valve
18 cm (7’’) 41 cm (16-1/8’’)
MDV20
24 cm (9-7/16’’)
MDV12
21 cm (8-1/4’’)
MDV8
20 cm (7-7/8’’)
See mounting details
Putty
11 cm (4-5/16’’)
Thimble only for models
MDV12 & MDV20
Drywall anchor
Spacer
Screw
VENTILATION INSTALLATION continued
10