DR. Heater DR-975 User manual

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7,500W/240V WALL / CEILING MOUNTED
GARAGE HEATER
OWNER’S MANUAL
Model: DR-975
7500W 240V 60Hz
IMPORTANT INSTRUCTIONS
READ & SAVE

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TABLE OF CONTENTS
Important Instructions………………………………………. 3
Installation Instructions………………………. ……………..5
Specifications and Wiring Diagram ……………………….. 8
Parts of the Heater……………………….…………..……… 9
Operating Instructions……………………….………....…… 10
Maintenance and Cleaning…………………………………. 12
Troubleshooting……………………………………………… 13

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IMPORTANT INSTRUCTIONS
PLEASE READ ALL INSTRUCTIONS BEFORE USING THIS
HEATER
NOTE: There may be a trace of smoke or odor when unit is first
operated. Don’t be alarmed. This indicates that a drop of oil fell
on the heating coil during the manufacturing process. It will
quickly evaporate and should not re-occur.
Make sure that the room in which the appliance is located is well
ventilated during this operation. It is normal for the appliance to
emit small cracking sounds when you turn it on for the first
time. Do not be alarmed.
WHEN USING ELECTRICAL APPLIANCES, BASIC PRECAUTIONS
SHOULD ALWAYS BE FOLLOWED TO REDUCE RISK OF FIRE,
ELECTRICAL SHOCK, AND INJURY TO PERSONS OR
PROPERTY, INCLUDING THE FOLLOWING:
1) Read all instructions before using this heater.
2) This heater is hot when in use. To avoid burns, do not let bare skin
touch hot surfaces. Keep combustible materials, such as furniture,
pillows, bedding, papers, clothes, and curtains at least 3 feet (0.9 m)
from the front of the heater and keep such materials away from the
sides and rear.
3) Extreme caution is necessary when any heater is used by or near
children or disabled persons and whenever the heater is left operating
and unattended.
4) Always switch off the heater when not in use.
5) Do not operate any heater after the heater malfunctions or has been
dropped or damaged in any manner. Disconnect power at the circuit
breaker and have heater inspected by a certified/licensed electrician
before reusing.
6) Do not use outdoors.
7) To disconnect heater, turn off power to heater circuit at main
disconnect panel.
8) This heater should be installed at least 6 feet (in the United States) or
2.4 meters (in Canada) from the floor and no closer than 1 foot (0.3 m)
from any adjacent surfaces or walls. Keep at least 1 foot (0.3 m) from
the back wall, regardless of whether the wall mount bracket is used.

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9) Do not insert or allow foreign objects to enter any ventilation or
exhaust opening as this may cause an electric shock or fire and
potentially damage the heater.
10) To prevent a possible fire, do not block air intakes or exhaust in any
manner.
11) A heater has hot and arcing or sparking parts inside. To reduce the
risk of fire, do not use in areas where gasoline, paint, or flammable
vapors and liquids are used or stored.
12) Use this heater only as described in this manual. Any other use not
recommended by the manufacturer may cause fire, electric shock, or
injury to persons.
13) This product must be installed by a certified/licensed electrician, in
accordance with applicable local codes.
14) For supply cables, use 8 AWG (8.3 mm2) copper wires.
15) This heater includes a visual alarm to warn that parts of the heater
are getting excessively hot. If the alarm flashes, immediately turn the
heater OFF and inspect for any objects on or adjacent to the heater that
may have blocked the airflow or otherwise caused high temperatures to
have occurred.
DO NOT OPERATE THE HEATER WITH THE ALARM FLASHING. To
reset the heater, switch the CIRCUIT BREAKER OFF and wait five to ten
minutes for the heater to cool down before turning the heater on again.
16) This appliance is not intended for use by persons (including
children) with reduced physical, sensory, or mental capabilities, or lack
of experience and knowledge, unless they have been given supervision
or instruction regarding use of the appliance by a person responsible for
their safety. Children should be supervised to ensure that they do not
play with the appliance.
CAUTION –HIGH TEMPERATURE, RISK OF FIRE. Keep
electrical cords, drapery, furnishings, and other combustibles at
least 3 feet (0.9 m) from the front of the heater and away from
the sides and rear.
SAVE THESE INSTRUCTIONS

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WARNING: All wiring must be installed by a certified/licensed
electrician.
The heater must be grounded in accordance with applicable national
and local building codes.
WARNING: To reduce the risk of fire, do not store or use gasoline or
other flammable vapors and liquids in the vicinity of the heater.
All wiring procedures and connections should be in accordance
with applicable national and local codes.
NOTE: Compatible with a 240V Line Voltage Double Pole Wall
Thermostat. Must be installed by a certified/licensed electrician.
Before installation:
Disconnect the main supply connection.
Supply cables should be 8 AWG (8.3 mm2) copper wires.
The heater must be connected to an individual branch circuit
protected by a 40 Amp circuit breaker only.
Supply cables must be equipped with a dual pole circuit breaker
rating at least 240V 40A/pole as main cutoff switch of power
connection to the heater.
CAUTION:HIGH TEMPERATURE, RISK OF FIRE. Keep electrical
cords, drapery, furnishings, and other combustibles at least 3 feet
(0.9 m) from the front of the heater and away from the sides and rear.
WARNING: To reduce the risk of fire, do not store or use gasoline
or other flammable vapors and liquids in the vicinity of the heater.
INSTALLATION INSTRUCTIONS:
1. This heater should be installed at least 6 feet (in the United States)
or 2.4 meters (in Canada) from the floor and no closer than 1 foot
(0.3 m) from any adjacent surfaces or walls. This minimum distance
must be maintained.
2. Do not install closer than 1 foot (0.3 m) from any adjacent surfaces
INSTALLATION INSTRUCTIONS

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or walls.
3. Keep at least 1 foot (0.3 m) from the back wall, regardless of
whether the wall mount bracket is used.
4. Mark the drill-hole positions in the wall or ceiling for the mounting
bracket.
5. Drill the required holes with diameter fitted to the anchor provided
for positioning the wall mount bracket.
6. Insert the anchors.
7. Attach the wall mount bracket to the wall or ceiling and secure with
mounting screws.
8. Hook the unit to the wall mount bracket and let the unit hang from
the bracket.
9. Insert the screw through the mounting bracket and the heater
handle. Tighten the nut.
WALL MOUNT
CEILING MOUNT

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10. Remove the wiring compartment cover in the rear of the heater
by loosening the screw.
11. Run the electrical power supply cable in flexible conduit and
connect to the wiring compartment via the knock-out at rear of the
heater.
12. Make the connections properly with connectors which are
suitable for the conductor size, including ground wires. After making
the connections, arrange the pigtail leads of unit and power supply
wires in the wiring compartment.
13. You can use the internal or wall thermostat. If you use the
internal thermostat, select INTERNAL THERMOSTAT on the rocker
switch.
14. If you wish to use a wall thermostat (not included), select WALL
THERMOSTAT on the rocker switch. Then, insert the two wall
thermostat wires to Terminal A inside the heater. Make sure to
tighten the screws in Terminal A.
15. Replace the wiring compartment cover and lock in place with the
screw.

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7,500W/240V WALL / CEILING MOUNTED GARAGE HEATER
Model: DR-975
Volt: 240 V
Watts: 7500 W
Frequency: 60 Hz
BTU/h: 25597
Recommended Heating Capacity: 1.25 watts / ft³ (0.03m³)
Wiring diagram:
SPECIFICATIONS

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A. Upper Enclosure
B. Tilt Adjustable Knob
C. Front Exhaust Grill
D. Louver for air direction
E. Control Panel
F. Alarm LED
G. Power Indicator
H. Timer Indicator
I. Low Indicator
J. High Indicator
K. Internal/Wall Thermostat Switch
L. ON/OFF Switch
PARTS OF THE HEATER
F
H
G
J
I
A
B
C
D
E
K
L

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WARNING - The heater must be properly installed before it is
used.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC
FLASH:
Apply appropriate personal protective equipment (PPE) and
follow safe electrical work practices. See NFPA 70.
A circuit breaker must be installed and serviced only by
qualified electrical personnel.
Always use a properly rated voltage sensing device to
confirm power is off.
The Select switch on the heater is only for function
selection. Use circuit breaker as power ON/OFF for the
heater. The circuit breaker is to be installed by a
certified/licensed electrician and should be located in
line of sight from the heater location or should be
capable of being locked in open position. Follow the
operating instructions to reduce the risk of fire, electric
shock, injury, or death to persons.
Switch on the circuit breaker.
Insert the batteries into the remote control as shown below:
NOTE: Remove the batteries if the remote control is not to be used
for a month or more. Batteries left in the remote may leak and cause
damage.
DO NOT MIX OLD AND NEW BATTERIES! DO NOT MIX
ALKALINE, STANDARD (CARBON-ZINC) OR RECHARGEABLE
(NICKEL-CADMIUM) BATTERIES!
OPERATING INSTRUCTIONS

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TURNING THE HEATER ON
To turn the heater ON, select ON position on the ON/OFF rocker
switch. The power indicator light will turn on and display the
room temperature.
The default temperature setting is 70°F. If you select Inside
Thermostat and the room temperature is lower than or equal to
68°F, the heat function on the heater will engage on HIGH mode
and will turn off when the room temperature is higher than or
equal to 72°F.
SETTING THE TEMPERATURE
To set the desired temperature:
Press the +button until the temperature display starts flashing.
Press button again to increase the temperature or the -button to
decrease the temperature.
After setting the desired temperature, press the MODE button to
HIGH or LOW. When the ambient room temperature drops 2°F
below the set temperature, the heater will turn on and begin
heating the room on HIGH or LOW (depending on the setting).
The heater will turn off once it senses the room temperature to
be 2°F above the set temperature.
Note: If WALL THERMOSTAT is selected on rocker switch, only
the external thermostat on the wall can control the heater’s
temperature setting.
SETTING THE TIMER
Press the TIMER button until Set Time starts flashing. The
default value is 3 hours.
Press the “+” button to increase the set time or the “–” button to
decrease the set time. The timer can be set from 1 to 12 hours.
The timer will set and execute after the LED display stops
flashing. The heater will shut OFF automatically when the set
time is reached.
To turn the timer OFF, press the TIMER button, and then
pressing the “–”button to set the time to 0. The timer feature will
turn off when the LED stops flashing.
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To turn off the heater, switch off the circuit breaker.
The circuit breaker serves as the power source for
the heater.
This heater includes a visual alarm to warn that parts of the
heater are getting excessively hot. If the alarm flashes,
immediately turn the heater OFF and inspect for any objects on or
adjacent to the heater that may cause high temperatures. DO
NOT OPERATE THE HEATER WITH THE ALARM FLASHING.
To reset the heater, switch the circuit breaker OFF. Wait five to
ten minutes for the heater to cool down before turning the heater
on again.
No user maintenance on this heater should be undertaken except
regular cleaning as described below. All other servicing or
maintenance should be performed by qualified service personnel.
Before any cleaning, make sure that:
1. Power supply is disconnected at the source. Switch off the
circuit breaker.
2. Wait 60 minutes to ensure the heating element has cooled down.
Your heater is now ready for cleaning.
Regular Cleaning:
1. Do not spray chemicals or other cleaning liquids on the heater.
2. Interior dust can often be removed by using a vacuum cleaner
with a crevice tool attachment.
3. To clean enclosure, use a clean, soft, and lightly damp cloth to
gently wipe off the dirt from the surface of the unit. Make sure the
heating element and the switches do not get wet. Allow the unit to
dry completely before use.
CAUTION: DO NOT ALLOW WATER TO RUN INTO THE
INTERIOR OF THE HEATER AS THIS COULD CREATE A FIRE
OR ELECTRIC SHOCK HAZARD, DAMAGING THE UNIT.
MAINTENANCE AND CLEANING
INSTRUCTIONS(separate page)

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If your heater fails to operate, please follow these procedures:
This heater is intended to be a ceiling/wall-mounted heater. It has a
thermal cut-off protection. If the thermal cut-off protection trips,
switch off the power. Switch off the circuit breaker. The unit
should reset automatically after 10 minutes. If the thermal cut-off
protection trips again, consult a certified/licensed electrician to
determine the reason for overheating.
Problem
Probable Cause
Solution
Unit is not
heating.
Overheat protection has
temporarily deactivated the
heater.
Turn the heater OFF. Switch off
the circuit breaker. Wait 10
minutes before turning on the
heater.
Room temperature is higher than
the set temperature.
Increase thermostat setting to a
higher temperature.
Breaker/Fuse has been tripped.
Check your electrical box to
confirm the breaker has not
been blown. This may occur if
the receptacle is shared with
other high consumption
appliances.
The
heater is
producing
a burning
smell.
Check & ensure there are no
combustible materials within 0.9
meters (3 feet) surrounding the
heater.
Remove any combustible items
from the vicinity of the heater.
A drop of oil fell on the heating
coil during the manufacturing
process. It will quickly evaporate
and should not occur again.
Ensure room in which heater is
situated is well ventilated.
Ensure a minimum clearance of
36 inches (90 cm) from both
sides and rear of heater to
adjacent wall(s).
Reposition the heater so there is
enough space between the
heater and any adjacent
surface/wall.
TROUBLESHOOTING

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PLEASE DO NOT ATTEMPT TO OPEN OR REPAIR THE HEATER
YOURSELF. DOING SO COULD CAUSE DAMAGE TO THE
HEATER OR PERSONAL INJURY.
How long is the warranty?
This heater comes with a ONE-YEAR LIMITED COMPONENT WARRANTY. If
your unit does not appear to be working properly, please contact our service center
by calling 1-800-317-1688. Prior to your call, please have your product’s model
number, serial number, and purchase receipt/invoice ready so that we may assist
you more expediently.
Dr. Heater USA
239 Harbor Way
SOUTH SAN FRANCISCO, CA 94080
TEL: [phone]
EMAIL: [e-mail]
Dr Heater USA
@DrHeaterUSA
Dr. Heater USA
Dr. Heater USA