Munters TOR 67 WU, TOR 115 WU, TOR 175 WU, MIR 37 WU, MIR 55 WU Operating, Installation And Service Instructions

Operating, Installation
and Service Instructions

TOR
MIR

Direct- and Indirect-fired
Diesel/Kerosene Heaters

TOR 67 WU
TOR 115 WU
TOR 175 WU
MIR 37 WU
MIR 55 WU
MIR 85 WU

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1. GENERAL SAFETY RULES

• READ INSTRUCTIONS CAREFULLY. READ AND FOLLOW ALL INSTRUCTIONS.

PLACE INSTRUCTIONS IN A SAFE PLACE FOR FUTURE REFERENCE. DO NOT
ALLOW ANYONE WHO HAS NOT READ THESE INSTRUCTIONS TO ASSEMBLE,
LIGHT, ADJUST OR OPERATE THE HEATER.

• IF THE INFORMATION IN THIS MANUAL IS NOT FOLLOWED EXACTLY, A

FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.

• SERVICE MUST BE PERFORMED BY A QUALIFIED SERVICE AGENCY.

• UNVENTED PORTABLE HEATERS USE AIR (OXYGEN) FROM THE AREA IN

WHICH IT IS USED. ADEQUATE COMBUSTION AND VENTILATION AIR MUST BE
PROVIDED. REFER TO INSTRUCTIONS.

WARNING

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS
IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

WARNING

FIRE, BURN, INHALATION, AND EXPLOSION HAZARD.
KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING MATERIALS, PAPER OR
CARDBOARD, A SAFE DISTANCE
AWAY FROM THE HEATER AS RECOMMENDED BY THE INSTRUCTIONS. NEVER USE
THE HEATER IN SPACES WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE
COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT THINNER,
DUST PARTICLES OR UNKNOWN CHEMICALS.

WARNING

COMBUSTION BY-PRODUCTS PRODUCED WHEN USING THIS PRODUCT CONTAIN

CARBON MONOXIDE, A CHEMICAL KNOWN TO THE STATE OF CALIFORNIA

TO CAUSE CANCER AND BIRTH DEFECTS (OR OTHER REPRODUCTIVE HARM).

GENERAL HAZARD WARNING

FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED
WITH THIS HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND
PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN,
ASPHYXIATION, CARBON MONOXIDE POISONING, AND/OR ELECTRICAL SHOCK.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS
SHOULD USE OR SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTION
MANUAL, LABELS, ETC. CONTACT THE MANUFACTURER.

WARNING

NOT FOR HOME OR RECREATIONAL VEHICLE USE

WARNING

YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS,

SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU OPERATE THIS HEATER

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• THE ELECTRICAL SYSTEM TO WHICH THE APPLIANCE IS CONNECTED MUST COMPLY

WITH ALL SAFETY REGULATIONS IN FORCE. A RESIDUAL CURRENT CIRCUIT BREAKER MUST
BE PROVIDED ON THE MAIN DISTRIBUTION BOARD.

• UNPLUG THE HEATER BEFORE ATTEMPTING ANY SERVICE OR MAINTENANCE.

• ALWAYS CHECK THE POWER SUPPLY CABLE BEFORE USE. IT MUST NOT BE BENT,

CRUSHED, OR ANYWAY DAMAGED.

• THE POWER SUPPLY CABLE MUST BE REPLACED ONLY BY QUALIFIED PERSONNEL.

• ONLY USE AN ORIGINAL POWER CABLE WITH A 3-PIN GROUNDED PLUG.

• DO NOT TOUCH THE EXHAUST GAS OUTLET. DANGER OF BURNS!

2. PRODUCT DESCRIPTION

• Mobile space heater with:

 closed combustion chamber and gas exhaust duct (indirect-fired models)
 open combustion chamber (direct-fired models)

3. TECHNICAL SPECIFICATIONS

3.1 Indirect-fired heaters

Model # MIR 37 WU MIR 55 WU MIR 85 WU

Firing rate (BTU/hr) 125,200 180,900 288,700
Air Flow Rate (ft³/min) 1180 1470 2650
Fuel Types Diesel / Kerosene / #1-2 Fuel Oil
Fuel Consumption (gal/hr) 0.88 1.28 2.04
Fuel Nozzle 0.65 60°H 1.00 60° H 1.50 80° W
Efficiency (%) 87.1 87.1 88.5
Noise Level at 2m (dB(A)) 75 73 73
Voltage (V) 115V 60Hz 1ph
Electrical Power (W) 460 460 800
Current Rating (A) 7.0 7.0 12.5
Weight (lb) 154 178 282
Lenght (in) 47 54.8 68.0
Width (in) 24 27.6 29.5
Height (in) 31 32.7 40.4
Flue Diameter (in) 6 6 6
Tank Capacity (gal) 14 26.5 36.0
Fuel Pressure (psi) 175 175 175
Air Lock Setting 1 2 3.5

3.2 Direct-fired heaters

Model # TOR 67 WU TOR 115 WU TOR 175 WU

Firing rate (BTU/hr) 227,000 396,500 607,000
Air Flow Rate (ft³/min) 1650 2825 3240
Fuel Types Diesel/Kerosene/ #1-2 Fuel Oil
Fuel Consumption (gal/hr) 1.60 2.80 4.28
Fuel Nozzle 1.25 60°S 2.25 80°W 3.50 80°S
Efficiency (%) 100 100 100
Noise Level at 2m (dB(A)) 73 73 76
Voltage (V) 115V 60Hz 1ph
Electrical Power (W) 460 800 1100
Current Rating (A) 7 12.5 17.5
Weight (lb) 142 223 264
Lenght (in) 55.3 66.1 76.3
Width (in) 24.4 27.2 29.6
Height (in) 29.5 35.4 40.8
Tank Capacity (gal) 14 26 36
Fuel Pressure (psi) 175 175 175
Air Lock Setting 1.5 3.5 9.0

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4. INSTALLATION INSTRUCTIONS

4.1. General instructions

• THE INSTALLATION OF THE EQUIPMENT SHALL BE IN ACCORDANCE WITH THE

REGULATION OF AUTHORITIES HAVING JURISDICTION AND CSA B139.

• The heater must be operated only by properly trained personnel. The manufacturer’s instructions must be

followed.

• The heater must be installed and operated so that people are not exposed to dangers deriving from exhaust

gases, from the hot air flow and in such a way that no fire risks exist.

• It is forbidden to install the heater in the surroundings of flammable materials, combustible products, or in

explosive atmospheres.

• When an indirect-fired heater connected to a flue pipe is used in a closed room, provide a minimum

opening area of 1 ft³ per US gallon capacity at the unit level.

• When a direct-fired heater - or an indirect-fired heater not connected to a flue pipe - is used in a closed

room, provide a minimum opening area of 3 ft2 per US gallon capacity at the unit level and a continuous, natural
air circulation through windows and doors.

• For the use of the heater the general and special fire safety regulations in force in all fields of applications

must be followed. In any case the following minimum safety clearances from flammable materials or objects in
the surroundings of the heater must be ensured:

Sides: 2 ft (610 mm) Air inlet : 2 ft (610 mm)
Top: 5 ft (1520 mm) Air outlet: 10 ft (3050 mm)
Flue pipe: 3 ft (915 mm)

• Floors and ceilings must be made of fireproof materials in the place where the heater is operated.

• The air inlet and outlet must never be blocked for any reason.

• Install the heater on a flat, level floor in a steady position.

• It is forbidden to connect direct-fired heaters to air ducts.

4.2 Assembling the heater

• Before operating the heater, assemble axle, wheels and lower support following the diagram below:

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Maintenance and checks

2

3 4

• Depending on the operational conditions, usually every year, the heater should be checked by qualified

personnel.

• Prior to start-up, the user must check for any evident non-compliance with rules of use, safety and
protection.

5. INSTRUCTIONS FOR USE

5.1 Start-up

• The heater is factory set for operation

without room thermostat.

1

• If operation with room (remote)

thermostat is desired, remove the socket
cover (Fig. 1 nr. 1) and insert the thermostat
plug into the socket.

•

Fill the tank with fuel of proper type.

Fig.1

• Connect the supply plug to a 115V ~ 60 Hz single phase earthed socket. The green lamp indicates that the

heater is powered.

• WARNING: THE APPLIANCE MUST BE EARTHED

Correct Incorrect

• Indirect fired heaters: connect the heater to a

chimney or to a exhaust duct. To get a proper
draught (at least 0,1 mbar) in the chimney the
exhaust gas path must rise. Avoid any elbows
and bends in the first part of the exhaust ducts
for at least 3 m. For operation of heater in closed
rooms without flue refer to the instructions for
installation (par. 4)

• If a room (remote) thermostat is used, set

maximum temperature on it.

• Turn switch to position “ON”

• Set the desired temperature on room

thermostat.

5.2. Reset after lockout – Safety air pressure switch

• The heater is equipped with a Reset pushbutton. When the heater locks out, the red lamp on the pushbutton

(fig. 1 n°2) lights up. In this case push the Reset button (see also the par. “Troubleshooting”) to restart the
heater.

• The heater is also equipped with an air pressure switch that controls the airflow pressure and locks the

heater out in the event of unit overheating. If this occurs, detect and eliminate the cause of overheating before
using the heater again. Have the heater inspected by a qualified technician if required. See point above for
resetting.

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5.3. Shut down.

• Set switch to “OFF” to shut the flame off. The fan will go on rotating for 1 min 45 sec to cool the heater

down. The fan motor will automatically stop at the end of the aftercooling time, then the unit can be
disconnected from mains.

Never disconnect the supply plug to stop the heater while in operation

The big amount of heat produced could damage the components: allow cooling sequence to take place

6. MAINTENANCE

• Before carrying out any maintenance operation, disconnect the power plug.

• Maintenance must be carried out by qualified personnel (see also par. 7)

• The appliance must be thoroughly cleaned once a year to ensure good combustion and long life.

• Clean periodically

 the oil spraying nozzle and its filter;
 the oil pump filter
 the main fuel filter cartridge
 the ignition electrodes
 the fan blades
 the inside of the appliance, using compressed air
 the flame sensor with a mild detergent

• Periodically check cables and electrical connections.

• Check the oil filter and replace if necessary.

7. TROUBLESHOOTING

TROUBLE CAUSE SOLUTION

Heater does not start No power

Faulty cable/connections Check/have cable replaced by a

Room thermostat socket cap not

Heater in lock-out mode Reset

heater locks out

Heater starts, flame does not ignite and
then heater locks out

No fuel Fill tank
Ignition fault, dirty or incorrectly spaced

Heater starts, but combustion is not
good

Oil pump provides low pressure Contact service personnel
Insufficient combustion air Wrong air lock setting
Insufficient ventilation air Contact service personnel
Heater stops as the air pressure switch
functions

Burnt fuse
Room thermostat set too low

inserted

Dirty or faulty flame sensor Clean or replace Heater starts, flame ignites but then

Faulty burner control unit
Clogged nozzle Clean or replace
Flame sensor receives an external light
signal during ignition sequence
Faulty burner control unit Contact service personnel

electrodes
Dirty or blocked nozzle Clean or replace
Clogged filters Clean or replace
Leakes in fuel circuit Check and eventually replace

The appliance has overheated
Faulty pressure switch

Check main distribution board and
power supply line

qualified electrician
Check and replace if required

Set room thermostat on a higher
temperature
Insert cap into the thermostat socket

Contact service personnel

Check for external lights (sun, lamps,
etc.)

Clean electrodes, contact service
personnel if required

See par. 5.2.
Contact service personnel

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8. WIRING DIAGRAM

TOR 67 WU, TOR 115 WU
MIR 37 WU, MIR 55 WU, MIR 85 WU

M

TRcont.

FR

L

TH

M3

EV

black 2

white

black

IN

EV

P

black brown

PA

black

black 1

M17

M13

TR

FC

TR

black

M15

M9

M

M7

M11

PL

PL

M2M1M6M5

EV Fuel Solenoid Valve
TR Ignition Transformer
M Motor
SL Warning Lamp
PA Air Pressure Switch

dk. blue

FR

lt. blue

brown

M12

M18

black

white

white

SL

black

N

L

FS

M16

M10

M8

M14

N

PL

M19M4

FS Fuse
FC Flame Sensor
PL Reset Button
IN Switch
TH Remote Thermostat
FR Heated Filter

green

green

FC

TOR 175 WU

black

black

M13

EV

TR

FC

2

PL

white

green

1

3

black

IN

white

brown

red

1

3

2

TH

Optional

EV Fuel Solenoid Valve
TR Ignition Transformer
M Motor
SL Warning Lamp

PA

P

EV

PA Air Pressure Switch

TR

white

M

black

R

black

black

M17

M15

M9

TRcont.

M

M7

FR

L

M11

PL

M2M1M6M5

TH IN

M3

PL

white

FR

white

white

white

M18

M16

M14

black

black

M12

black

white

white

SL

black

N

L

FS

M10

M8

N

PL

M19M4

FS Fuse
FC Flame Sensor
PL Reset Button
IN Switch
TH Remote Thermostat
FR Heated Filter
R Relay

green

green

FC

white

green

2

1

3

PL

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black

IN

white

brown

red

1 3

2

TH

Optional

8

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