Munters GRY-D 15 HU, GRY-D 20 HU, GRY-D 20 WU, GRY-D 28 WU, GRY-D 40 WU Operating, Installation And Service Instructions
...
Operating, Installation
and Service Instructions
GRY-D
GRY-I
Direct-fired Diesel
or Kerosene Heaters
GRY-D 15 HU
GRY-D 20 HU
GRY-D 20 WU
GRY-D 28 WU
GRY-D 40 WU
GRY-D 60 WU
GRY-I 15 WU
GRY-I 25 WU
GRY-I 40 WU
Index
1. General safety rules
2. Description of the appliance
3. Technical data
4. Installation instructions
5. Instructions for use
6. Maintenance
7. Troubleshooting
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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.
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE
VICINITY OF THIS OR ANY OTHER APPLIANCE.
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.
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).
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 INSTRUCTIONS MANUAL, LABELS, ETC. CONTACT THE
MANUFACTURER.
NOT FOR HOME OR RECREATIONAL VEHICLE USE
YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS,
SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU OPERATE THIS HEATER
• THE ELECTRICAL SYSTEM TO WHICH THE APPLIANCE IS CONNECTED MUST COMPLY WITH
CURRENT LEGISLATION. INSTALLATION REQUIRES A SUITABLE CIRCUIT BREAKER IN THE MAIN
DISTRIBUTION BOARD.
• UNPLUG THE APPLIANCE BEFORE PERFORMING ANY MAINTENANCE OPERATIONS.
• ALWAYS CHECK THE POWER CABLE BEFORE USING THE APPLIANCE. IT MUST NOT BE BENT,
TAUT, STREACHED, CRUSHED OR ANY WAY DAMAGED.
• THE POWER CABLE CONNECTION MUST BE MADE BY QUALIFIED PERSONNEL ONLY. USE AN
ORIGINAL POWER CABLE ONLY WITH A 3-PIN APPROVED PLUG.
• DANGER (BURNS)! DO NOT TOUCH THE EXHAUST GAS OUTLET.
2. APPLIANCE DESCRIPTION
• Mobile space heater with:
closed combustion chamber and gas exhaust duct (indirect-fired models)
open combustion chamber (direct-fired models)
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WARNING
WARNING
WARNING
GENERAL HAZARD WARNING
WARNING
WARNING
3
automatic cooling function (indirect-fired models and GRY-D 60)
3. TECHNICAL SPECIFICATIONS
3.1 Direct-fired heaters
Model # GRY-D
15 HU
GRY-D
20 HU
GRY-D
20 WU
GRY-D
28 WU
GRY-D
40 WU
GRY-D
60 WU
Heat Input (BTU/hr) 51,600 80,500 80,500 101,260 140,200 211,000
Air Flow Rating (ft³/min) 210 240 240 300 620 765
Fuel Type Diesel
Kerosene
#1-2 Fuel Oil
Fuel Consumption (gal/hr)
0.39 0.58 0.58 0.73 1.01 1.51
Diesel
Kerosene #1-
2 Fuel Oil
Diesel
Kerosene #1-
2 Fuel Oil
Diesel
Kerosene
#1-2 Fuel
Oil
Diesel
Kerosene
#1-2 Fuel
Oil
Diesel
Kerosene
#1-2 Fuel Oil
Fuel Nozzle Size 0.40 gph 0.65 gph 0.65 gph 0.75 gph 1.00 gph 1.50 gph
Efficiency (%) (100) (100) (100) (100) (100) (100)
Noise Level at 2m (dB(A))
69 71 71 72 75 75
Voltage (V) 115V 60Hz 115V 60Hz 115V 60Hz 115V 60Hz 115V 60Hz 115V 60Hz
Electrical Power 1/6 HP 1/6 HP 1/6 HP 1/4 HP 1/3 HP 1/3 HP
Current Rating (A) 1.8 2.0 2.0 3.5 4.0 4.2
Weight (lb) 41 44 57 68 81 84
Lenght (in) 32 32 33 34 37 42
Width (in) 14 14 17 19 22 22
Height (in) 16 16 18 21 24 25
Tank Capacity (gal) 5.6 5.6 5.6 8 12 12
Air Pressure Setting (psi) 4.1 4.5 4.5 4.8 5.8 4.9
3.2 Indirect-fired heaters
Model # GRY-I
15 WU
GRY-I
25 WU
GRY-I
40 WU
Heat Input (BTU/hr) 50,630 91,750 133,000
Air Flow Rating (ft³/min) 412 557 710
Fuel Type Diesel
Kerosene
#1-2 Fuel Oil
Diesel
Kerosene
#1-2 Fuel Oil
Diesel
Kerosene
#1-2 Fuel Oil
Fuel Consumption (gal/hr) 0.36 0.66 0.94
Fuel Nozzle 0.40 gph 0.75 gph 1.00 gph
Efficiency (%) 84.4 80.0 81.4
Noise Level at 2m (dB(A)) 63 75 75
Voltage (V) 115V 60Hz 115V 60Hz 115V 60Hz
Electrical Power 1/4 HP 1/3 HP 1/3 HP
Current Rating (A) 3.5 4.0 4.0
Weight (lb) 77 88 93
Lenght (in) 34 37 42
Width (in) 19 22 22
Height (in) 22 25 26
Tank Capacity (gal) 8 12 12
Air Pressure Setting (psi) 4.4 4.8 4.9
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.
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• 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
atmosphere.
• 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 materials or objects in the surroundings of the heater must be
assured:
Side: 2 ft (610 mm)
Air inlet side: 2 ft (610 mm)
Top: 5 ft (1525 mm)
Hot air outlet side: 10 ft (3050 mm)
Floor: 0 ft (0 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 Maintenance and checks
• 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.
4.3 Assembly instructions
GRY 15/20 HU (model without wheels)
Before use, assemble the handle as follows:
1) Unscrew the four screws (1) to
4
3
1
2
5
remove the upper cover (2).
2) Align handle (3) to holes on
upper shell (2), fix handle using
screws (4) and nuts (5)
supplied with the unit.
3) Reassemble the upper shell (2).
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GRY-D 20/28/40/60 WU , GRY-I 15/25/40 WU (models with wheels)
Before use, assemble wheels, handle and accessories. Wheels, handle and the mounting accessories are found in the shipping
carton.
1) 1 body of the heater
2) 1 handle
3) 1 wheel support frame
4) 1 axle
5) 2 wheels
6) 4 screws
7) 4 nuts
8) 4 washers
9) 2 spacer rings
10) 2 cap nuts
11) flue adaptor (GRY-I models only)
To assemble the heater, proceed as follows (see ill.1):
Slide axle (4) through wheel support frame (3). Install in the following order: spacer rings (9), wheels (5), and cap
nuts (10) on axle ends, by tapping lightly. Connect the flue adaptor (11) to the exhaust collar and then to a flue pipe
(indirect-fired heaters only).
Place heater on wheel support frame and line up holes on the fuel tank flange with holes on wheel support frame.
Insert screws and washers through handles, fuel tank flange and wheel support frame. Attach nut finger tight after
each screw is inserted, then tighten all nuts firmly.
Direct-fired models Indirect-fired models
5. Instructions for use
5.1. Start-up
Fill the tank with clean fuel.
Connect the power plug to a 115V ~ 60 Hz single-phase, grounded power outlet. Electrical grounding is mandatory.
Move the ON/OFF (I/O) switch to the "ON"(I) position.
Models GRY-I 15 WU / 25WU / 40WU / GRY-D 60WU:
For operation with remote thermostat, remove the thermostat outlet cover on control panel and plug the thermostat
connector.
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• Indirect fired heaters:
connect the heater to a
Correct Incorrect
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 remote
thermostat is used, set it
on maximum temperature.
• Turn switch to
position “ON”
• Set the desired
temperature on room
thermostat.
5.2. Manual reset/restart (ON/OFF switch)
When the appliance locks out, move the ON/OFF switch to position OFF and then to position ON again to restart the
appliance (see also "Troubleshooting")
5.3. Air pressure switch
The heater is equipped with an air pressure switch that controls the airflow pressure. In the event of overheating the
pressure switch shuts the heater down. 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. To reset, let the unit cool unit down and then restart it
as described above (see par. 5.2).
5.4. Shut-down
Move switch to "OFF" (O) position.
DIRECT-FIRED MODELS: the unit shuts down immediately.
INDIRECT-FIRED MODELS and GRY-D 60 WU: the fan continues to rotate for about 2 minutes to cool the
combustion chamber. Then the appliance automatically shuts down.
Do not unplug while in operation. Allow the heater to cool before stop
The big amount of heat produced could damage the components
6. Maintenance
BEFORE ANY MAINTENANCE OPERATIONS, SHUT DOWN, UNPLUG AND LET THE HEATER COOL.
Maintenance must be carried out by qualified personnel (see also section 7).
The appliance must be thoroughly cleaned once a year to assure correct combustion and long life.
In addition the following must be cleaned more often depending on fuel and operating environment:
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Fan
Clean fan using a cloth moistened with kerosene or light solvent. Dry fan thoroughly using compressed air. Clean fan blades
at least every 500 hours of functioning.
Nozzle
Carefully remove nozzle from the nozzle fitting. Blow compressed air through the face of nozzle to free any dirt.
Air Filters (ill. 2)
Clean the air filter regularly, especially if the appliance is used in dusty environments. Remove filter end cover (1), wash air
intake filter (2) using a light detergent and dry it thoroughly before reinstalling. Replace air delivery filter (4) at least once a
year.
Ignition Electrodes
Clean, adjust and if necessary replace ignition electrodes every 300 hours of functioning. For electrode gap see illustration.
Pump Pressure Adjustment
Remove pressure gauge cap from filter end cover. Install a pressure gauge with a precision of at least 0.1 psi. Start heater and
read air pressure value. If necessary adjust pressure as follows:
Model Air Pump Pressure(psi)
GRY-D 15 HU
GRY-D 20 HU
GRY-D 20 WU
GRY-D 28 WU
GRY-D 40 WU
GRY-D 60 WU
GRY-I 15 WU
GRY-I 25 WU
GRY-I 40 WU
4.1
4.5
4.5
4.8
5.8
4.9
4.4
4.8
4.9
Electrical
A periodic inspection of cables, electrical parts and connections by qualified personnel is recommended
.
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7. Troubleshooting
PROBLEM
Motor does not start
Motor runs, but the heater
does not ignite and locks
out after a short time
Fuel filter clogged Clean or replace fuel filter
Air leaks in oil line Check pipes, tighten connections, if necessary
Burner nozzle clogged Clean nozzle blowing compressed air, replace if
Fuel viscosity increased due to low
Flames come out of flue
outlet
CAUSE REMEDY
No power or low voltage
Faulty or damaged power cord
Faulty motor/capacitor
Lock-out of appliance due to overheating
Empty fuel tank, dirty or wrong fuel Remove wrong or dirty fuel
temperature
Insufficient air flow into combustion
chamber
Compressor pressure too high
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Check power line and voltage
Check fuse and replace if necessary
Check power cord
Replace power cord
Check and if necessary replace
Detect the cause of overheating
Shut the appliance down
Check air inlet and outlet
Wait some minutes and restart the appliance
If required clean/replace air pressure switch
Fill the tank with clean oil or kerosene
replace
necessary
Mix oil with 10-20% kerosene
Check fan
Check pump air pressure
Set air pressure to correct rating
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8. Wiring diagrams
GRY-D 15HU / 20WU-HU / 28WU / 40WU
black
FS
white
whiteblack
M
black
MT
PHOTO
N
N
N
EARTH
TR
SV
PHOTO
N
L
FC Photocell
Fuse
TR
N
black
L
INT 1
INT 2
FS
Switch
IN
Motor
M
TR Transformer
PA Air pressure switch
GRY-I 15 WU / 25WU / 40WU
GRY-D 60WU
blue
N
L
white
black
FS
white
M
green
MT
PHOTO
FC
black
N
N
N
EARTH
TR
SV
PHOTO
green
black
black
black
P
black
PA
IN
EV
TR
N
black
L
INT 1
brown
INT 2
Air solenoid valve
EV
Photocell
FC
FS
Fuse
IN
Switch
M
Motor
TH
Remote thermostat (optional)
TR Transformer
PA Air pressure switch
black
green
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FC
green
3
TH
Optional
black
brown
1
2
black
black
P
black
PA
IN
10
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11
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