Toyotomi HC-190 User manual

CONTENTS
IMPORTANT
READ AND UNDERSTAND INSTRUCTIONS BEFORE INSTALLING OR USING UNIT.
RETAIN INSTRUCTIONS FOR FUTURE REFERENCE. CHECK LOCAL CODES AND ORDINANCES FOR PERMITTED USE.
SECTION A:
Specifications
SECTION B:
Unpacking
SECTION C:
Safety Tips for Installation
SECTION D:
Installation
Selecting a Location
Plumbing
Removing Trapped Air
Permanent Wiring Installation
External Output Terminal Wiring
Wiring For External Output
SECTION E:
Operating Controls and Part Names
SECTION F:
Safety Tips for Operation
SECTION G:
Before use
Operation
SECTION H:
Test Run
SECTION I:
Routine Maintenance
SECTION J:
Troubleshooting
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HEAT CONVECTOR
INSTALLATION AND OPERATION INSTRUCTIONS
MODEL HC-190

1
Model: HC-190
Type: Hot Water Heating, Floor Standing Type
Heat Rating Range: 4,050 to 20,000 BTU/h (1.2 to 5.8 kW)
*See the chart below for details.
Max. Allowable Pressure: 142 PSI (0.98 MPa)
Heat Exchanger Capacity: 0.16 gal. (0.6 L)
Flow Rate Range: 0.5 gal./min. to 1.5 gal./min. (1.89 to 5.68 L/min.)
Hot Water Temperature: 110˚F – 190˚F (43˚C – 87.8˚C)
Noise Level High: 40 dBA Med: 35 dBA Low: 23 dBA
NOTE: Noise levels tested at 2.5 m.
Air Volume High: 226 CFM Med: 141 CFM Low: 64 CFM
Operation Mode: Auto Fan Mode – 4 fan speeds (High/Med/Low/Off)
Manual Fan Mode – 3 fan speeds (High/Med/Low)
Dimensions (W × H × D): 28-3/8” × 15-1/4” × 7-3/16” (720 × 387 × 182 mm)
Weight: 27.5 lbs. (12.5 kg)
Set Temperature Range: 50˚F – 90˚F (12˚C – 30˚C)
Electrical Rating: 120 Volts AC, Single phase 60 Hz
High - 37W (0.4A)
Med - 16W
Low - 9W
Electrical Current Fuse: 5A
Heating Performance:
Hydraulic Resistance
Circulation Water Volume Resistance
1.5 G (5.68 L/min)
1.0 G (3.79 L/min)
0.5 G (1.89 L/min)
7.0 PSI/48 kPa
3.2 PSI/22 kPa
0.9 PSI/6 kPa
4026 BTU 4991 BTU 5939 BTU 6905 BTU 7870 BTU 8818 BTU 9784 BTU 10732 BTU 11697 BTU
4987 BTU 6183 BTU 7357 BTU 8553 BTU 9748 BTU 10923 BTU 12118 BTU 13293 BTU 14488 BTU
5479 BTU 6775 BTU 8048 BTU 9345 BTU 10641 BTU 11914 BTU 13211 BTU 14484 BTU 15780 BTU
4372 BTU 5421 BTU 6451 BTU 7500 BTU 8548 BTU 9578 BTU 10627 BTU 11657 BTU 12706 BTU
5793 BTU 7182 BTU 8547 BTU 9936 BTU 11325 BTU 12690 BTU 14079 BTU 15443 BTU 16832 BTU
6427 BTU 7952 BTU 9449 BTU 10974 BTU 12498 BTU 13995 BTU 15520 BTU 17017 BTU 18541 BTU
4459 BTU 5529 BTU 6579 BTU 7649 BTU 8718 BTU 9769 BTU 10839 BTU 11889 BTU 12959 BTU
5993 BTU 7430 BTU 8841 BTU 10278 BTU 11716 BTU 13127 BTU 14564 BTU 15976 BTU 17413 BTU
6933 BTU 8578 BTU 10195 BTU 11841 BTU 13487 BTU 15103 BTU 16749 BTU 18365 BTU 20011 BTU
(BTU)
Room Temperature: 68˚F (20˚C)
(kW)
Room Temperature: 68˚F (20˚C)
GPM (L/min) Fan Speed
Circulation Water Volume Temperature of Circulation Water
Low
Medium
High
Low
Medium
High
Low
Medium
High
0.5 GPM (1.89 L/min)
1 GPM (3.79 L/min)
1.5 GPM (5.68 L/min)
SECTION A:
SPECIFICATIONS
110˚F (43˚C) 120˚F (49˚C) 130˚F (54˚C) 140˚F (60˚C) 150˚F (66˚C) 160˚F (71˚C) 170˚F (77˚C) 180˚F (82˚C) 190˚F (88˚C)
1.19 kW 1.47 kW 1.75 kW 2.03 kW 2.31 kW 2.59 kW 2.88 kW 3.15 kW 3.44 kW
1.48 kW 1.83 kW 2.17 kW 2.52 kW 2.87 kW 3.21k W 3.57 kW 3.91 kW 4.26 kW
1.62 kW 2.00 kW 2.37 kW 2.75 kW 3.13 kW 3.51 kW 3.89 kW 4.26 kW 4.64 kW
1.29 kW 1.60 kW 1.90 kW 2.21 kW 2.51 kW 2.82 kW 3.12 kW 3.42 kW 3.73 kW
1.71 kW 2.12 kW 2.52 kW 2.93 kW 3.33 kW 3.73 kW 4.14 kW 4.54 kW 4.95 kW
1.90 kW 2.34 kW 2.78 kW 3.23 kW 3.68 kW 4.11 kW 4.56 kW 5.00 kW 5.45 kW
1.32 kW 1.63 kW 1.94 kW 2.25 kW 2.56 kW 2.87 kW 3.18 kW 3.49 kW 3.81 kW
1.77 kW 2.19 kW 2.61 kW 3.03 kW 3.45 kW 3.86 kW 4.28 kW 4.70 kW 5.12 kW
2.05 kW 2.53 kW 3.00 kW 3.48 kW 3.97 kW 4.44 kW 4.92 kW 5.40 kW 5.88 kW
GPM (L/min) Fan Speed
Circulation Water Volume Temperature of Circulation Water
Low
Medium
High
Low
Medium
High
Low
Medium
High
0.5 GPM (1.89 L/min)
1 GPM (3.79 L/min)
1.5 GPM (5.68 L/min)
110˚F (43˚C) 120˚F (49˚C) 130˚F (54˚C) 140˚F (60˚C) 150˚F (66˚C) 160˚F (71˚C) 170˚F (77˚C) 180˚F (82˚C) 190˚F (88˚C)
Operation panel Front panel Air filter
External output
(for circulation control or zone valve)
Main circuit board
Transformer
Thermistor
(Water Temperature)
Fan
Junction box
Water return
(NPT 1/2 female)
Water supply
(NPT 1/2 female)
Thermistor
(Room Temperature)
Louvers
Heat exchanger
Fan moter
28 - 3/8” (720 mm)
7 - 3/16”
(182 mm)
7 - 3/16”
(182 mm) 9/16” (15 mm)
1-13/16” (46 mm)
1-9/16” (40 mm)
15 - 1/4” (387 mm)
4 - 7/8” (124 mm)
1-3/8” (35 mm)
90˚
SECTION B:
UNPACKING
UNPACKING
1. Unpack the unit carefully.
2. Check to see if there are any loose screws that may have occurred in transit.
3. Take accessories and the instruction manual out of the carton.
ACCESSORY PARTS
1. Installation and Operation Instructions
2. Warranty Card
3. Wall Fixing Kit (Wall bracket – 2 sets, Screw – 2 pcs., Wooden screw – 2 pcs.)
DIMENSIONAL OUTLINE
Air release screw

2
Model: HC-190
Type: Hot Water Heating, Floor Standing Type
Heat Rating Range: 4,050 to 20,000 BTU/h (1.2 to 5.8 kW)
*See the chart below for details.
Max. Allowable Pressure: 142 PSI (0.98 MPa)
Heat Exchanger Capacity: 0.16 gal. (0.6 L)
Flow Rate Range: 0.5 gal./min. to 1.5 gal./min. (1.89 to 5.68 L/min.)
Hot Water Temperature: 110˚F – 190˚F (43˚C – 87.8˚C)
Noise Level High: 40 dBA Med: 35 dBA Low: 23 dBA
NOTE: Noise levels tested at 2.5 m.
Air Volume High: 226 CFM Med: 141 CFM Low: 64 CFM
Operation Mode: Auto Fan Mode – 4 fan speeds (High/Med/Low/Off)
Manual Fan Mode – 3 fan speeds (High/Med/Low)
Dimensions (W × H × D): 28-3/8” × 15-1/4” × 7-3/16” (720 × 387 × 182 mm)
Weight: 27.5 lbs. (12.5 kg)
Set Temperature Range: 50˚F – 90˚F (12˚C – 30˚C)
Electrical Rating: 120 Volts AC, Single phase 60 Hz
High - 37W (0.4A)
Med - 16W
Low - 9W
Electrical Current Fuse: 5A
Heating Performance:
Hydraulic Resistance
Circulation Water Volume Resistance
1.5 G (5.68 L/min)
1.0 G (3.79 L/min)
0.5 G (1.89 L/min)
7.0 PSI/48 kPa
3.2 PSI/22 kPa
0.9 PSI/6 kPa
4026 BTU 4991 BTU 5939 BTU 6905 BTU 7870 BTU 8818 BTU 9784 BTU 10732 BTU 11697 BTU
4987 BTU 6183 BTU 7357 BTU 8553 BTU 9748 BTU 10923 BTU 12118 BTU 13293 BTU 14488 BTU
5479 BTU 6775 BTU 8048 BTU 9345 BTU 10641 BTU 11914 BTU 13211 BTU 14484 BTU 15780 BTU
4372 BTU 5421 BTU 6451 BTU 7500 BTU 8548 BTU 9578 BTU 10627 BTU 11657 BTU 12706 BTU
5793 BTU 7182 BTU 8547 BTU 9936 BTU 11325 BTU 12690 BTU 14079 BTU 15443 BTU 16832 BTU
6427 BTU 7952 BTU 9449 BTU 10974 BTU 12498 BTU 13995 BTU 15520 BTU 17017 BTU 18541 BTU
4459 BTU 5529 BTU 6579 BTU 7649 BTU 8718 BTU 9769 BTU 10839 BTU 11889 BTU 12959 BTU
5993 BTU 7430 BTU 8841 BTU 10278 BTU 11716 BTU 13127 BTU 14564 BTU 15976 BTU 17413 BTU
6933 BTU 8578 BTU 10195 BTU 11841 BTU 13487 BTU 15103 BTU 16749 BTU 18365 BTU 20011 BTU
(BTU)
Room Temperature: 68˚F (20˚C)
(kW)
Room Temperature: 68˚F (20˚C)
GPM (L/min) Fan Speed
Circulation Water Volume Temperature of Circulation Water
Low
Medium
High
Low
Medium
High
Low
Medium
High
0.5 GPM (1.89 L/min)
1 GPM (3.79 L/min)
1.5 GPM (5.68 L/min)
SECTION A:
SPECIFICATIONS
110˚F (43˚C) 120˚F (49˚C) 130˚F (54˚C) 140˚F (60˚C) 150˚F (66˚C) 160˚F (71˚C) 170˚F (77˚C) 180˚F (82˚C) 190˚F (88˚C)
1.19 kW 1.47 kW 1.75 kW 2.03 kW 2.31 kW 2.59 kW 2.88 kW 3.15 kW 3.44 kW
1.48 kW 1.83 kW 2.17 kW 2.52 kW 2.87 kW 3.21k W 3.57 kW 3.91 kW 4.26 kW
1.62 kW 2.00 kW 2.37 kW 2.75 kW 3.13 kW 3.51 kW 3.89 kW 4.26 kW 4.64 kW
1.29 kW 1.60 kW 1.90 kW 2.21 kW 2.51 kW 2.82 kW 3.12 kW 3.42 kW 3.73 kW
1.71 kW 2.12 kW 2.52 kW 2.93 kW 3.33 kW 3.73 kW 4.14 kW 4.54 kW 4.95 kW
1.90 kW 2.34 kW 2.78 kW 3.23 kW 3.68 kW 4.11 kW 4.56 kW 5.00 kW 5.45 kW
1.32 kW 1.63 kW 1.94 kW 2.25 kW 2.56 kW 2.87 kW 3.18 kW 3.49 kW 3.81 kW
1.77 kW 2.19 kW 2.61 kW 3.03 kW 3.45 kW 3.86 kW 4.28 kW 4.70 kW 5.12 kW
2.05 kW 2.53 kW 3.00 kW 3.48 kW 3.97 kW 4.44 kW 4.92 kW 5.40 kW 5.88 kW
GPM (L/min) Fan Speed
Circulation Water Volume Temperature of Circulation Water
Low
Medium
High
Low
Medium
High
Low
Medium
High
0.5 GPM (1.89 L/min)
1 GPM (3.79 L/min)
1.5 GPM (5.68 L/min)
110˚F (43˚C) 120˚F (49˚C) 130˚F (54˚C) 140˚F (60˚C) 150˚F (66˚C) 160˚F (71˚C) 170˚F (77˚C) 180˚F (82˚C) 190˚F (88˚C)
Operation panel Front panel Air filter
External output
(for circulation control or zone valve)
Main circuit board
Transformer
Thermistor
(Water Temperature)
Fan
Junction box
Water return
(NPT 1/2 female)
Water supply
(NPT 1/2 female)
Thermistor
(Room Temperature)
Louvers
Heat exchanger
Fan moter
28 - 3/8” (720 mm)
7 - 3/16”
(182 mm)
7 - 3/16”
(182 mm) 9/16” (15 mm)
1-13/16” (46 mm)
1-9/16” (40 mm)
15 - 1/4” (387 mm)
4 - 7/8” (124 mm)
1-3/8” (35 mm)
90˚
SECTION B:
UNPACKING
UNPACKING
1. Unpack the unit carefully.
2. Check to see if there are any loose screws that may have occurred in transit.
3. Take accessories and the instruction manual out of the carton.
ACCESSORY PARTS
1. Installation and Operation Instructions
2. Warranty Card
3. Wall Fixing Kit (Wall bracket – 2 sets, Screw – 2 pcs., Wooden screw – 2 pcs.)
DIMENSIONAL OUTLINE
Air release screw

3
The instructions which are contained in this manual are classified into the following two types, which are “WARNING”
and “CAUTION”. These instructions are intended to provide important information for safe operation.
“WARNING” indicates the possibility of causing the user a fatal accident or serious injury if the unit is incorrectly
operated.
“CAUTION” indicates the possibility of causing the user injuries or material damages if the unit is incorrectly
operated.
WARNING
1. Improper installation, adjustment, modification, or service and maintenance by an unauthorized person may cause
SERIOUS UNIT DAMAGE, BODILY INJURY, HAZARD OR PROPERTY DAMAGE. This unit should be installed by a
licensed, authorized person(s) due to the necessity of making electrical and water connections. Refer to the
installation and operation instructions for assistance, or consult your dealer for further information.
2. HAZARD OF ELECTRICAL SHOCK! Before removing any access panels of unit for service, make sure the
electrical supply to the unit is shut off. Failure to do this may result in HAZARD, SERIOUS BODILY INJURY, OR
PROPERTY DAMAGE.
3. Check and comply with all state, and local codes before beginning the installation.
CAUTION
1. Keep the area around the unit clean and free of flammable materials.
2. RISK OF FIRE AND ELECTRIC SHOCK. DO NOT apply any excessive force or pressure to the power supply cord.
Make sure the plug is free of dust. Be sure plug fits the receptacle securely.
SECTION C:
SAFETY TIPS FOR INSTALLATION
WARNING: This unit must be installed in accordance with these instructions, local codes, ordinances and/or in the
absence of local codes National Plumbing standards.
Check and comply with all state and local codes before beginning the installation.
This unit should be installed by a licensed, authorized person(s) due to the necessity of making
electrical and water connections.
SELECTING A LOCATION
Select a place to install the unit where hot water and electric supply are easily available.
1. Select a place which is free of combustible substances.
2. Select a place where proper maintenance and repair can be provided for the unit after installation.
3. Install the unit on level floor.
NOTE: The unit may be installed on the wall directly.
Not less
than 4 in.
Not less
than 4 in.
SECTION D:
INSTALLATION
Not less than 12 in.
(1 ft.)

4
The instructions which are contained in this manual are classified into the following two types, which are “WARNING”
and “CAUTION”. These instructions are intended to provide important information for safe operation.
“WARNING” indicates the possibility of causing the user a fatal accident or serious injury if the unit is incorrectly
operated.
“CAUTION” indicates the possibility of causing the user injuries or material damages if the unit is incorrectly
operated.
WARNING
1. Improper installation, adjustment, modification, or service and maintenance by an unauthorized person may cause
SERIOUS UNIT DAMAGE, BODILY INJURY, HAZARD OR PROPERTY DAMAGE. This unit should be installed by a
licensed, authorized person(s) due to the necessity of making electrical and water connections. Refer to the
installation and operation instructions for assistance, or consult your dealer for further information.
2. HAZARD OF ELECTRICAL SHOCK! Before removing any access panels of unit for service, make sure the
electrical supply to the unit is shut off. Failure to do this may result in HAZARD, SERIOUS BODILY INJURY, OR
PROPERTY DAMAGE.
3. Check and comply with all state, and local codes before beginning the installation.
CAUTION
1. Keep the area around the unit clean and free of flammable materials.
2. RISK OF FIRE AND ELECTRIC SHOCK. DO NOT apply any excessive force or pressure to the power supply cord.
Make sure the plug is free of dust. Be sure plug fits the receptacle securely.
SECTION C:
SAFETY TIPS FOR INSTALLATION
WARNING: This unit must be installed in accordance with these instructions, local codes, ordinances and/or in the
absence of local codes National Plumbing standards.
Check and comply with all state and local codes before beginning the installation.
This unit should be installed by a licensed, authorized person(s) due to the necessity of making
electrical and water connections.
SELECTING A LOCATION
Select a place to install the unit where hot water and electric supply are easily available.
1. Select a place which is free of combustible substances.
2. Select a place where proper maintenance and repair can be provided for the unit after installation.
3. Install the unit on level floor.
NOTE: The unit may be installed on the wall directly.
Not less
than 4 in.
Not less
than 4 in.
SECTION D:
INSTALLATION
Not less than 12 in.
(1 ft.)

5
Supply opening NPT 1/2” Female
Air Release Screw
Return opening NPT 1/2” Female
PLUMBING
NOTE: Make sure the piping for the unit is laid out properly, and also check for any water leakage.
1. Install heat insulation material on the water piping to prevent heat loss.
2. Copper or polyethylene pipe should be used for connecting pipes.
3. It is recommended to install shut-off valves on the supply and return sides for easy removal.
4. It is recommended to install a bypass loop in the water pipes with a shut-off valve.
5.
Be sure to use anti-freezing solution, or non-scale block, or non-slime block, or corrosion-free water for the circulation
water.
Temperature of circulation water has to be less than 190˚F (87.8˚C)
Maximum allowable working pressure has to be less than 142 PSI
REMOVING TRAPPED AIR
When operating for the first time, air may be trapped in the system. To release the air out of the piping and the unit,
follow the procedures below.
1. To remove the air release cover, remove the two (2) screws.
2. Loosen the Air release screw by using the flat head screwdriver. Release the air out of the piping.
3. Tighten the Air release screw after removing all trapped air.
4. Immediately wipe off any spilled water.
5. Attach the Air release cover.
PERMANENT WIRING INSTALLATION
WARNING: TO AVOID ANY RISK OF FIRE AND ELECTRIC SHOCK. Make sure the Main circuit breaker and power
supply cord is disconnected before servicing. Electric shock may cause serious injury. It is
recommended that installation should be conducted by a Licensed Electrician.
PROCEDURE FOR PERMANENT WIRING
POWER SOURCE: 120V AC, 60Hz single phase
1. Turn off the Main circuit breaker. Disconnect power supply cord from the power source.
2. Remove the two (2) screws and Junction box cover on the back side of unit.
3. Disconnect the ground wire (green) from the power supply cord bracket.
4. Disconnect the two power supply wires from Junction box terminal.
5. Squeeze the strain relief bushing with an adjustable pliers to remove the plastic bushing from the unit (right side).
Remove the power supply cord.
6. Remove the Hole cap on the back side of the unit and put it in hole of the right side where the power supply cord
was installed.
7. Use at least AWG 14/2 gauge copper wire to the Junction box, feed wire through hole to the right of Junction box
Cover and use 1/2 inch clamp connector to secure to Heat convector cabinet.
8. Affix the Junction box cover to the unit and insert screws.
Hole cap
POWER SUPPLY 120VAC
SINGLE PHASE 60Hz
GROUND
Junction box coverPower supply cord

6
Supply opening NPT 1/2” Female
Air Release Screw
Return opening NPT 1/2” Female
PLUMBING
NOTE: Make sure the piping for the unit is laid out properly, and also check for any water leakage.
1. Install heat insulation material on the water piping to prevent heat loss.
2. Copper or polyethylene pipe should be used for connecting pipes.
3. It is recommended to install shut-off valves on the supply and return sides for easy removal.
4. It is recommended to install a bypass loop in the water pipes with a shut-off valve.
5.
Be sure to use anti-freezing solution, or non-scale block, or non-slime block, or corrosion-free water for the circulation
water.
Temperature of circulation water has to be less than 190˚F (87.8˚C)
Maximum allowable working pressure has to be less than 142 PSI
REMOVING TRAPPED AIR
When operating for the first time, air may be trapped in the system. To release the air out of the piping and the unit,
follow the procedures below.
1. To remove the air release cover, remove the two (2) screws.
2. Loosen the Air release screw by using the flat head screwdriver. Release the air out of the piping.
3. Tighten the Air release screw after removing all trapped air.
4. Immediately wipe off any spilled water.
5. Attach the Air release cover.
PERMANENT WIRING INSTALLATION
WARNING: TO AVOID ANY RISK OF FIRE AND ELECTRIC SHOCK. Make sure the Main circuit breaker and power
supply cord is disconnected before servicing. Electric shock may cause serious injury. It is
recommended that installation should be conducted by a Licensed Electrician.
PROCEDURE FOR PERMANENT WIRING
POWER SOURCE: 120V AC, 60Hz single phase
1. Turn off the Main circuit breaker. Disconnect power supply cord from the power source.
2. Remove the two (2) screws and Junction box cover on the back side of unit.
3. Disconnect the ground wire (green) from the power supply cord bracket.
4. Disconnect the two power supply wires from Junction box terminal.
5. Squeeze the strain relief bushing with an adjustable pliers to remove the plastic bushing from the unit (right side).
Remove the power supply cord.
6. Remove the Hole cap on the back side of the unit and put it in hole of the right side where the power supply cord
was installed.
7. Use at least AWG 14/2 gauge copper wire to the Junction box, feed wire through hole to the right of Junction box
Cover and use 1/2 inch clamp connector to secure to Heat convector cabinet.
8. Affix the Junction box cover to the unit and insert screws.
Hole cap
POWER SUPPLY 120VAC
SINGLE PHASE 60Hz
GROUND
Junction box coverPower supply cord

7
Wall bracket B
Wooden screw
Wall bracket A
Rubber bushing Cover
EXTERNAL OUTPUT TERMINAL WIRING
This unit has an External output terminal for low-voltage (24 volts or less) contacts to connected to a circulation
pump control or zone valve. When connecting the circulation control or zone valve unit to this terminal, it is possible
to stop the circulation by the output from internal contact switch in the Heat convector. When the Power switch is
ON and there is a call for heat, the internal contact switch is closed. When Power switch is OFF or the Room
temperature reaches 4 degrees above Set temperature the internal contact switch is open.
WIRING FOR EXTERNAL OUTPUT
1. Remove the four (4) screws and the cover on the back side of the unit.
2. Cut the rubber bushing of the cover by a cutter and insert the wire for the circulation control or zone valve.
3. Connect the wire to the terminal block in accordance with the color indication.
4. Fix the cover to the unit with the four (4) screws.
After installation is completed, secure the unit to the wall with the wall fixing kit provided with the unit.
NOTE: Make sure the unit is parallel to the wall.
Universal Switching Relay,
Control or Zone Valve.
[EXTERNAL OUTPUT SPECIFICATIONS]
Contact Rating
Maximum Switching Voltage
Maximum Carrying Current
Maximum Switching Power
Minimum Switching load
3A 24VAC
30VDC
5A
90W
10mA 5VDC
External output terminal
Cover
24 VAC
24 VAC
Note: Use at least
AWG 18 wire.
POWER SUPPLY
120VAC
CIRCULATION
WATER PUMP
Operation panel
Front panel
5. Power lamp
2. AUTO/MANUAL button
4. CHILD LOCK button
6. TIMER lamp 7. TEMP/TIMER/CLOCK set
Water supply (NPT 1/2 female) Water return (NPT 1/2 female)
8. Digital display
10. AUTO/MANUAL indicator
3. TIMER button
9. CHILD LOCK indicator
11. AM/PM indicator
1. Power switch
Junction box
Air filter
External output
(for circulation control or zone valve)
Louvers
12. Thermistor
(Room Temperature)
SECTION E:
OPERATING CONTROLS AND PART NAMES
Air release screw
DIGITAL DISPLAY

8
Wall bracket B
Wooden screw
Wall bracket A
Rubber bushing Cover
EXTERNAL OUTPUT TERMINAL WIRING
This unit has an External output terminal for low-voltage (24 volts or less) contacts to connected to a circulation
pump control or zone valve. When connecting the circulation control or zone valve unit to this terminal, it is possible
to stop the circulation by the output from internal contact switch in the Heat convector. When the Power switch is
ON and there is a call for heat, the internal contact switch is closed. When Power switch is OFF or the Room
temperature reaches 4 degrees above Set temperature the internal contact switch is open.
WIRING FOR EXTERNAL OUTPUT
1. Remove the four (4) screws and the cover on the back side of the unit.
2. Cut the rubber bushing of the cover by a cutter and insert the wire for the circulation control or zone valve.
3. Connect the wire to the terminal block in accordance with the color indication.
4. Fix the cover to the unit with the four (4) screws.
After installation is completed, secure the unit to the wall with the wall fixing kit provided with the unit.
NOTE: Make sure the unit is parallel to the wall.
Universal Switching Relay,
Control or Zone Valve.
[EXTERNAL OUTPUT SPECIFICATIONS]
Contact Rating
Maximum Switching Voltage
Maximum Carrying Current
Maximum Switching Power
Minimum Switching load
3A 24VAC
30VDC
5A
90W
10mA 5VDC
External output terminal
Cover
24 VAC
24 VAC
Note: Use at least
AWG 18 wire.
POWER SUPPLY
120VAC
CIRCULATION
WATER PUMP
Operation panel
Front panel
5. Power lamp
2. AUTO/MANUAL button
4. CHILD LOCK button
6. TIMER lamp 7. TEMP/TIMER/CLOCK set
Water supply (NPT 1/2 female) Water return (NPT 1/2 female)
8. Digital display
10. AUTO/MANUAL indicator
3. TIMER button
9. CHILD LOCK indicator
11. AM/PM indicator
1. Power switch
Junction box
Air filter
External output
(for circulation control or zone valve)
Louvers
12. Thermistor
(Room Temperature)
SECTION E:
OPERATING CONTROLS AND PART NAMES
Air release screw
DIGITAL DISPLAY

9
Main switch turns the unit on or off.
Button switches fan speed to either AUTO and MANUAL.
Button turns Timer operation mode on or off.
The button turns CHILD LOCK operation mode on or off.
Light means the unit is in operation.
Light means the unit operating in Timer setting mode.
TEMP/TIMER/CLOCK set modes can be set by pressing
“–/hour” or “+/min.” buttons.
Displays clock, set temperature, room temperature and
error code.
Light – The unit is in CHILD LOCK mode.
Light – Digital display shows fan speed mode.
Light – Digital display shows current time.
Constantly senses room temperature and supplies
information to the unit so that desired room temperature
can be maintained.
For use in 120V, AC electrical outlet.
1. POWER switch:
2. AUTO/MANUAL button:
3. TIMER button:
4. CHILD LOCK button:
5. POWER lamp:
6. TIMER indicator:
7. TEMP/TIMER/CLOCK set:
8. Digital display:
9. CHILD LOCK indicator:
10. AUTO/MANUAL indicator:
11. AM/PM indicator:
12. Thermistor: (Room Temperature Sensor)
Power supply cord:
The instructions which are contained in this manual are classified into the following two types, which are “WARNING”
and “CAUTION”. These instructions are intended to provide important information for safe operation.
“WARNING” indicates the possibility of causing the user a fatal accident or serious injury if the unit is incorrectly
operated.
“CAUTION” indicates the possibility of causing the user injury or material damages if the unit is incorrectly
operated.
WARNING
1. ALWAYS plug into 120 V, 60 Hz, single phase electrical outlet.
2. Due to high surface temperatures, keep heater away from children, furniture and clothing while in operation.
3. DO NOT touch the Heat exchanger.
4. NEVER insert objects of any kind into the air intake or air outlet.
5. DO NOT unplug if your hands are wet. An electrical shock may occur.
6. DO NOT run power cord under carpets, rugs, or floor mats of any kind.
7. DO NOT apply any excessive force or pressure to the power supply cord.
8. Make sure that the plug is free of dust or debris.
9. DO NOT use an extension cord.
10. RISK OF INJURY FROM MOVING PARTS AND ELECTRICAL SHOCK. Disconnect power cord before servicing
unit.
CAUTION
1. Keep objects more than 20 in. (50 cm) away from front of unit.
2.
DO NOT place animals, plants, or combustion equipment in a place which is subjected to the direct air flow of
the unit.
3. DO NOT ride or place objects on the unit.
4. DO NOT try to repair or alter unit by yourself.
5. DO NOT place flower vase or water containers on the top of the unit.
6. DO NOT block the air inlet or outlet.
7. To prevent abnormal operation and prolong heater life, be sure to perform routine maintenance.
SECTION F:
SAFETY TIPS FOR OPERATION

10
Main switch turns the unit on or off.
Button switches fan speed to either AUTO and MANUAL.
Button turns Timer operation mode on or off.
The button turns CHILD LOCK operation mode on or off.
Light means the unit is in operation.
Light means the unit operating in Timer setting mode.
TEMP/TIMER/CLOCK set modes can be set by pressing
“–/hour” or “+/min.” buttons.
Displays clock, set temperature, room temperature and
error code.
Light – The unit is in CHILD LOCK mode.
Light – Digital display shows fan speed mode.
Light – Digital display shows current time.
Constantly senses room temperature and supplies
information to the unit so that desired room temperature
can be maintained.
For use in 120V, AC electrical outlet.
1. POWER switch:
2. AUTO/MANUAL button:
3. TIMER button:
4. CHILD LOCK button:
5. POWER lamp:
6. TIMER indicator:
7. TEMP/TIMER/CLOCK set:
8. Digital display:
9. CHILD LOCK indicator:
10. AUTO/MANUAL indicator:
11. AM/PM indicator:
12. Thermistor: (Room Temperature Sensor)
Power supply cord:
The instructions which are contained in this manual are classified into the following two types, which are “WARNING”
and “CAUTION”. These instructions are intended to provide important information for safe operation.
“WARNING” indicates the possibility of causing the user a fatal accident or serious injury if the unit is incorrectly
operated.
“CAUTION” indicates the possibility of causing the user injury or material damages if the unit is incorrectly
operated.
WARNING
1. ALWAYS plug into 120 V, 60 Hz, single phase electrical outlet.
2. Due to high surface temperatures, keep heater away from children, furniture and clothing while in operation.
3. DO NOT touch the Heat exchanger.
4. NEVER insert objects of any kind into the air intake or air outlet.
5. DO NOT unplug if your hands are wet. An electrical shock may occur.
6. DO NOT run power cord under carpets, rugs, or floor mats of any kind.
7. DO NOT apply any excessive force or pressure to the power supply cord.
8. Make sure that the plug is free of dust or debris.
9. DO NOT use an extension cord.
10. RISK OF INJURY FROM MOVING PARTS AND ELECTRICAL SHOCK. Disconnect power cord before servicing
unit.
CAUTION
1. Keep objects more than 20 in. (50 cm) away from front of unit.
2.
DO NOT place animals, plants, or combustion equipment in a place which is subjected to the direct air flow of
the unit.
3. DO NOT ride or place objects on the unit.
4. DO NOT try to repair or alter unit by yourself.
5. DO NOT place flower vase or water containers on the top of the unit.
6. DO NOT block the air inlet or outlet.
7. To prevent abnormal operation and prolong heater life, be sure to perform routine maintenance.
SECTION F:
SAFETY TIPS FOR OPERATION

11
BEFORE USE
1. Position of the Unit
Make sure the position of the unit is level.
2. Plug in the Unit
Plug unit into a 120V AC electrical outlet. On digital display will appear two sets of
dashes. Indicating the time is not set.
3. Setting the Clock
Important: Clock on the unit must always be set to current time. Press “–/hour” and “+/min.” button to change to the
correct time. NOTE: “–/hour” or “+/min.” button will change the time every one (1) unit
.
Holding the button continuously will cause the time to change rapidly.
NOTE: In the event of a power failure all clock and timer setting are cancelled and will need to be reset.
OPERATION
NOTE: When you first use your unit, or when you plug the unit into an electrical outlet to start to use, operation
mode has been set to Auto Fan mode.
NOTE:
When the circulation water at the temperature of 100˚F (38˚C) or more flows into the unit, the fan will start rotating.
If the temperature of the circulation water is less than 100˚F (38˚C), the fan will not start rotating. If the
temperature of the circulation water is between 100˚F (38˚C) and 110˚F (43˚C), the unit will operate at low fan
speed. When the temperature of the circulation water is more than 110˚F (43˚C), the fan speed is adjusted
automatically according to the set temperature and the room temperature.
1. Turning Unit ON
Press Power switch. The current room temperature and the set temperature will be shown on the digital display.
POWER lamp will light and will hear a beep sound.
Adjusting Room Temperature
A. Press “–/hour” or “+/min.” button. the “ ˚ ” marks will start to flash.
NOTE: “–/hour” or “+/min.” button will change the temperature every 2˚F (1˚C).
B. Press “–/hour” or “+/min.” button as required. Room temperature can be set from 50˚F – 90˚F (12˚C – 30˚C).
(Initial setting : 68˚F (20˚C))
NOTE: Desired temperature setting will be displayed on the digital display when you set the room temperature.
SECTION G:
OPERATION
C. When room temperature exceeds the selected setting by approx. 4˚F (2˚C), the Fan will automatically stop.
As room temperature drops, the Fan will automatically re-start to maintain the desired temperature.
NOTE: Initial setting of the temperature is Fahrenheit. If you like to change to Celsius, contact your dealer.
2. Turning Unit OFF
Press Power switch. POWER lamp will go out and there will hear a beep sound. The current time will be shown
on the digital display. If the clock is not set, two sets of dashes will be shown.
NOTE: When the unit is turned off, always stop the circulation of the hot water to the Heat convector.
If a circulation pump control is connected to the External output terminal, the Circulation pump will
stop automatically when the Heat convector is turned off.
AUTO FAN OPERATION
The Auto Fan mode shifts the fan speed automatically to adjust the room temperature according to the set temperature.
1. Press the Power switch. The current room temperature and the set temperature will be shown on the digital
display. Power lamp will light. If the unit is set to Auto Fan mode, “AUTO”is shown on the digital display. If
“MANUAL”is shown on the digital display, press the AUTO FAN/MANUAL FAN button to switch the fan mode.
2. Press “-/hour” or “+/min.” button as required. Room temperature can be set from 50˚F – 90˚F (12˚C – 30˚C).
NOTE: The fan speed is shifted automatically between low, medium, and high fan speed to maintain the room
temperature.
Once the room temperature exceeds the selected setting by approx. 4˚F (2˚C), the Fan will automatically
stop.
MANUAL FAN OPERATION
1. Press the Power switch. Power lamp will light and the current room temperature and the set temperature will
be shown on the digital display. If the unit is set .. Manual Fan mode, “MANUAL” is shown on the digital display.
If “AUTO” is shown on the digital display, press the AUTO FAN/MANUAL FAN button to switch to the manual
mode.
2. Press “-/hour” or “+/min.” button to select the fan speed “F3” is high fan speed, “F2” is medium, and “F1” is low.
NOTE: The room temperature is not controlled during the Manual Fan mode. The fan speed will stay in the set
fan mode regardless of room temperature.
TIMER OPERATION
“TIMER” operation is programmed for a particular time and temperature, in order to save energy when the unit is
used for example at night or while you are away from home.
NOTE: Meaning the timer feature allows a user to automatically change the temperature (set by user) until a certain
time of day (set by user) by pressing the Timer button. This button must be pushed each time you want the
temperature to go to a different temperature. It does not automatic start.
“TIMER OPERATION” is not available in Manual Fan mode

12
BEFORE USE
1. Position of the Unit
Make sure the position of the unit is level.
2. Plug in the Unit
Plug unit into a 120V AC electrical outlet. On digital display will appear two sets of
dashes. Indicating the time is not set.
3. Setting the Clock
Important: Clock on the unit must always be set to current time. Press “–/hour” and “+/min.” button to change to the
correct time. NOTE: “–/hour” or “+/min.” button will change the time every one (1) unit
.
Holding the button continuously will cause the time to change rapidly.
NOTE: In the event of a power failure all clock and timer setting are cancelled and will need to be reset.
OPERATION
NOTE: When you first use your unit, or when you plug the unit into an electrical outlet to start to use, operation
mode has been set to Auto Fan mode.
NOTE:
When the circulation water at the temperature of 100˚F (38˚C) or more flows into the unit, the fan will start rotating.
If the temperature of the circulation water is less than 100˚F (38˚C), the fan will not start rotating. If the
temperature of the circulation water is between 100˚F (38˚C) and 110˚F (43˚C), the unit will operate at low fan
speed. When the temperature of the circulation water is more than 110˚F (43˚C), the fan speed is adjusted
automatically according to the set temperature and the room temperature.
1. Turning Unit ON
Press Power switch. The current room temperature and the set temperature will be shown on the digital display.
POWER lamp will light and will hear a beep sound.
Adjusting Room Temperature
A. Press “–/hour” or “+/min.” button. the “ ˚ ” marks will start to flash.
NOTE: “–/hour” or “+/min.” button will change the temperature every 2˚F (1˚C).
B. Press “–/hour” or “+/min.” button as required. Room temperature can be set from 50˚F – 90˚F (12˚C – 30˚C).
(Initial setting : 68˚F (20˚C))
NOTE: Desired temperature setting will be displayed on the digital display when you set the room temperature.
SECTION G:
OPERATION
C. When room temperature exceeds the selected setting by approx. 4˚F (2˚C), the Fan will automatically stop.
As room temperature drops, the Fan will automatically re-start to maintain the desired temperature.
NOTE: Initial setting of the temperature is Fahrenheit. If you like to change to Celsius, contact your dealer.
2. Turning Unit OFF
Press Power switch. POWER lamp will go out and there will hear a beep sound. The current time will be shown
on the digital display. If the clock is not set, two sets of dashes will be shown.
NOTE: When the unit is turned off, always stop the circulation of the hot water to the Heat convector.
If a circulation pump control is connected to the External output terminal, the Circulation pump will
stop automatically when the Heat convector is turned off.
AUTO FAN OPERATION
The Auto Fan mode shifts the fan speed automatically to adjust the room temperature according to the set temperature.
1. Press the Power switch. The current room temperature and the set temperature will be shown on the digital
display. Power lamp will light. If the unit is set to Auto Fan mode, “AUTO”is shown on the digital display. If
“MANUAL”is shown on the digital display, press the AUTO FAN/MANUAL FAN button to switch the fan mode.
2. Press “-/hour” or “+/min.” button as required. Room temperature can be set from 50˚F – 90˚F (12˚C – 30˚C).
NOTE: The fan speed is shifted automatically between low, medium, and high fan speed to maintain the room
temperature.
Once the room temperature exceeds the selected setting by approx. 4˚F (2˚C), the Fan will automatically
stop.
MANUAL FAN OPERATION
1. Press the Power switch. Power lamp will light and the current room temperature and the set temperature will
be shown on the digital display. If the unit is set .. Manual Fan mode, “MANUAL” is shown on the digital display.
If “AUTO” is shown on the digital display, press the AUTO FAN/MANUAL FAN button to switch to the manual
mode.
2. Press “-/hour” or “+/min.” button to select the fan speed “F3” is high fan speed, “F2” is medium, and “F1” is low.
NOTE: The room temperature is not controlled during the Manual Fan mode. The fan speed will stay in the set
fan mode regardless of room temperature.
TIMER OPERATION
“TIMER” operation is programmed for a particular time and temperature, in order to save energy when the unit is
used for example at night or while you are away from home.
NOTE: Meaning the timer feature allows a user to automatically change the temperature (set by user) until a certain
time of day (set by user) by pressing the Timer button. This button must be pushed each time you want the
temperature to go to a different temperature. It does not automatic start.
“TIMER OPERATION” is not available in Manual Fan mode

13
70˚F
(Ordinary set temp)
70˚F
(Ordinary set temp.)
62˚F
4:00PMPress
Timer button
Example:
Your normal room temperature is set for 70 degrees. You work
from 8 am until 5 pm. You want the room temperature to drop to
62 degrees while you are at work and you want the room to
return to 70 degrees at 4 pm so it will be warm when you get
home. When you leave for work you must press the timer
button to activate the timer. The temperature will drop to 62 degrees and return to 70 degrees at 4 pm.
Setting Timer:
1. Make sure the clock is set. If not, press the hour and minute button until the correct time is indicated.
2. Press Timer button. The Timer lamp will flash. Use the “–/hour” and “+/min.” buttons to set the time at which
you want the room to return to normal temperature. This would be 4:00PM to have the room start heating up at 4
pm. You have ten seconds from the time you push the button to start entering this setting.
3. After ten seconds of not pressing the “–/hour” or “+/min” button, the display will change to tempature. The display
will show 68 degrees by default. Use the “–/hour” or “+/min” button to adjust the temperature setting, in this case
to the desired 62 degrees. The timer is now set and you are in the timer mode. To return to the normal operation
mode, press the Timer button again to turn off.
4.
If the unit has been set for a particular hour and temperature of the timer operation while in shutdown, the time lamp
will change from flashing to continuous and the timer time will be shown on the digital display after completion of
setting the timer. To start the timer operation press Power switch to turn on and then press the Timer button.
The Timer lamp will light and the timer operation will start.
NOTE: The unit operates at the same hour and at the same temperature, if it has once been set for such hour and
temperature.
NOTE: If at any time a power failure occurs the time and temperature settings are cancelled.
NOTE:
To cancel the timer operation, press the Timer button again. The Time lamp will go out. Normal operation
will then be restored.
NOTE: After the unit has been set for a particuler hour and temperature it will operate at that same time and
temperature when the timer button is turned on.
NOTE: To change the setting on the timer, during timer operation, press “–/hour” or “+/min.” button to change the
timer setting in the same way as 2. under “Setting Timer”.
CHILD LOCK OPERATION
Press the CHILD LOCK button for more than 3 seconds to set the child lock while in operation or not operation.
“CHILD LOCK” sign will be shown on the digital display.
If the Power Switch is pressed while the Child Lock is on and the unit is off, the unit will not start operation. If the
Power Switch is pressed when the Child Lock is on and the unit is in operation, then the unit will automatically
shut down with a continuous beeping sound. The Child Lock symbol on the digital diaplay will flash and “OFF” will
be shown on the digital display. See diagram below.
To stop the beeping sound, press the CHILD LOCK button for more than 3 seconds.
PREPARATION
1. Make sure there is no water leaking from the unit and piping.
2. Make sure electrical connections and grounding are wired properly.
3. Check for air trapped in the plumbing.
OPERATION
1. Plug into the receptacle.
2. Press the Power switch to ON position. Power lamp will come on.
3. When the hot water at the temperature of 100˚F (38˚C) or more flows into the unit, the Fan will start rotating.
POWER FAILURE RECOVERY SYSTEM
If at any time a power failure occurs during operation, the time, timer and temperature settings will be erased. When
the power returns, the unit will automatically restart with the following conditions.
Operation mode: The unit will restart in AUTO FAN mode.
TIMER: The Timer settings will be reset. Please reset the TIMER. (See page 12 TIMER OPERATION)
Set temperature: The Set temperature will resume to the previous temperature set.
Child Lock: The Child Lock will be restored to the previous setting.
The power lamp will blink to indicate that a power failure has occurred and that the time and timer has been erased.
To stop the blinking power lamp, press any button once.
SECTION H:
TEST RUN

14
70˚F
(Ordinary set temp)
70˚F
(Ordinary set temp.)
62˚F
4:00PMPress
Timer button
Example:
Your normal room temperature is set for 70 degrees. You work
from 8 am until 5 pm. You want the room temperature to drop to
62 degrees while you are at work and you want the room to
return to 70 degrees at 4 pm so it will be warm when you get
home. When you leave for work you must press the timer
button to activate the timer. The temperature will drop to 62 degrees and return to 70 degrees at 4 pm.
Setting Timer:
1. Make sure the clock is set. If not, press the hour and minute button until the correct time is indicated.
2. Press Timer button. The Timer lamp will flash. Use the “–/hour” and “+/min.” buttons to set the time at which
you want the room to return to normal temperature. This would be 4:00PM to have the room start heating up at 4
pm. You have ten seconds from the time you push the button to start entering this setting.
3. After ten seconds of not pressing the “–/hour” or “+/min” button, the display will change to tempature. The display
will show 68 degrees by default. Use the “–/hour” or “+/min” button to adjust the temperature setting, in this case
to the desired 62 degrees. The timer is now set and you are in the timer mode. To return to the normal operation
mode, press the Timer button again to turn off.
4.
If the unit has been set for a particular hour and temperature of the timer operation while in shutdown, the time lamp
will change from flashing to continuous and the timer time will be shown on the digital display after completion of
setting the timer. To start the timer operation press Power switch to turn on and then press the Timer button.
The Timer lamp will light and the timer operation will start.
NOTE: The unit operates at the same hour and at the same temperature, if it has once been set for such hour and
temperature.
NOTE: If at any time a power failure occurs the time and temperature settings are cancelled.
NOTE:
To cancel the timer operation, press the Timer button again. The Time lamp will go out. Normal operation
will then be restored.
NOTE: After the unit has been set for a particuler hour and temperature it will operate at that same time and
temperature when the timer button is turned on.
NOTE: To change the setting on the timer, during timer operation, press “–/hour” or “+/min.” button to change the
timer setting in the same way as 2. under “Setting Timer”.
CHILD LOCK OPERATION
Press the CHILD LOCK button for more than 3 seconds to set the child lock while in operation or not operation.
“CHILD LOCK” sign will be shown on the digital display.
If the Power Switch is pressed while the Child Lock is on and the unit is off, the unit will not start operation. If the
Power Switch is pressed when the Child Lock is on and the unit is in operation, then the unit will automatically
shut down with a continuous beeping sound. The Child Lock symbol on the digital diaplay will flash and “OFF” will
be shown on the digital display. See diagram below.
To stop the beeping sound, press the CHILD LOCK button for more than 3 seconds.
PREPARATION
1. Make sure there is no water leaking from the unit and piping.
2. Make sure electrical connections and grounding are wired properly.
3. Check for air trapped in the plumbing.
OPERATION
1. Plug into the receptacle.
2. Press the Power switch to ON position. Power lamp will come on.
3. When the hot water at the temperature of 100˚F (38˚C) or more flows into the unit, the Fan will start rotating.
POWER FAILURE RECOVERY SYSTEM
If at any time a power failure occurs during operation, the time, timer and temperature settings will be erased. When
the power returns, the unit will automatically restart with the following conditions.
Operation mode: The unit will restart in AUTO FAN mode.
TIMER: The Timer settings will be reset. Please reset the TIMER. (See page 12 TIMER OPERATION)
Set temperature: The Set temperature will resume to the previous temperature set.
Child Lock: The Child Lock will be restored to the previous setting.
The power lamp will blink to indicate that a power failure has occurred and that the time and timer has been erased.
To stop the blinking power lamp, press any button once.
SECTION H:
TEST RUN

15
FOR OPTIMUM UNIT PERFORMANCE, THE PARTS SHOWN BELOW SHOULD BE CLEANED REGULARLY:
1. Clean Louvers (ONCE A MONTH)
Dust and stains should be wiped off louvers with a damp cloth.
2. Clean Air Filter (ONCE A MONTH)
A mesh filter is located on the cabinet’s rear side. Once a month slide the filter up to remove and vacuum it clean.
To remove the air filter, remove the two (2) screws by using Phillips head screwdriver.
WARNING: NEVER touch the Heat exchanger. It can very hot and cause injury.
CAUTION: Be sure to unplug the unit before performing any checks or cleaning.
SECTION I:
ROUTINE MAINTENANCE
The following conditions can happen during operation of the unit.
PLEASE NOTE THE FOLLOWING BEFORE REQUESTING FOR HELP FOR REPAIR
AND SERVICES
Should problems arise during operation, use this chart to determine the cause and the proper steps to take. Be sure
to unplug the unit and allow to cool completely before taking corrective measures.
In the event that the unit should shut down itself, without any action on your part, you should look to the digital
display for any of the following error codes.
CONDITION
Does not operate.
Warm air does not blow.
Warm air does not blow and the displayed room
temperature is much different from actual temp.
Cold air blowing out.
Heating performance has decline.
Occasionally makes “cracking” noise when starting
or after shutdown.
“Ticking” noise.
Cannot be operated, beeping noise, and “OFF” is
shown on digital display.
Water running noise.
Air flow is poor.
Power lamp blinks.
REASON
- Power outage.
- Power supply cord is disconnected.
- Child Lock is on.
- Room temperature is higher than set temperature
when unit is in Auto fan mode.
- Water temperature is too low at the time of start of
operation. The temperature of the circulation water
is less than 100˚F (38˚C).
- Unit is exposed to direct sunlight.
- Room thermistor is exposed a heat source.
- Even if the temperature of the circulation water is
110˚F (43˚C) or more, the wind blowing off may feel
it cold.
- Clogged or dirty Air filter.
- Water pipe flow has been restricted.
- Expansion and shrinkage of plastic and metal parts
when they are heated or cooled. Normal
- Noise of relay, valve and/or Fan motor. Normal.
- POWER switch has been turned off while Child
Lock is turned on.
- Hot water is flowing into the unit. Normal
- When the temperature of the circulation water is
between 100˚F (38˚C) and 110˚F (43˚C), the unit will
operate at the low fan speed only.
- The Air filter is clogging.
- Indicating that the power failure occurred. To stop
the blinking power lamp, press any button once.
ERROR CODE CAUSE
Short-circuit of the Water thermistor
Electrical power supplied to unit has
abnormal Hz or frequency.
(Less than 45 Hz or more than 65 Hz)
Water thermistor is disconnected.
Water temperature too low
POWER switch was pressed at the time
power was restored.
SOLUTION
Consult your dealer.
Check power supply.
Main circuit board malfunction.
Consult your dealer.
Boiler malfunction.
Circulation pump malfunction.
Consult your dealer. (If the boiler and the
circulation pump are not malfunction)
Press POWER switch, if it does not
correct then Power Switch is defected.
SECTION J:
TROUBLESHOOTING
e- 03
f- 0
e- 08
e-13
e- 40

16
FOR OPTIMUM UNIT PERFORMANCE, THE PARTS SHOWN BELOW SHOULD BE CLEANED REGULARLY:
1. Clean Louvers (ONCE A MONTH)
Dust and stains should be wiped off louvers with a damp cloth.
2. Clean Air Filter (ONCE A MONTH)
A mesh filter is located on the cabinet’s rear side. Once a month slide the filter up to remove and vacuum it clean.
To remove the air filter, remove the two (2) screws by using Phillips head screwdriver.
WARNING: NEVER touch the Heat exchanger. It can very hot and cause injury.
CAUTION: Be sure to unplug the unit before performing any checks or cleaning.
SECTION I:
ROUTINE MAINTENANCE
The following conditions can happen during operation of the unit.
PLEASE NOTE THE FOLLOWING BEFORE REQUESTING FOR HELP FOR REPAIR
AND SERVICES
Should problems arise during operation, use this chart to determine the cause and the proper steps to take. Be sure
to unplug the unit and allow to cool completely before taking corrective measures.
In the event that the unit should shut down itself, without any action on your part, you should look to the digital
display for any of the following error codes.
CONDITION
Does not operate.
Warm air does not blow.
Warm air does not blow and the displayed room
temperature is much different from actual temp.
Cold air blowing out.
Heating performance has decline.
Occasionally makes “cracking” noise when starting
or after shutdown.
“Ticking” noise.
Cannot be operated, beeping noise, and “OFF” is
shown on digital display.
Water running noise.
Air flow is poor.
Power lamp blinks.
REASON
- Power outage.
- Power supply cord is disconnected.
- Child Lock is on.
- Room temperature is higher than set temperature
when unit is in Auto fan mode.
- Water temperature is too low at the time of start of
operation. The temperature of the circulation water
is less than 100˚F (38˚C).
- Unit is exposed to direct sunlight.
- Room thermistor is exposed a heat source.
- Even if the temperature of the circulation water is
110˚F (43˚C) or more, the wind blowing off may feel
it cold.
- Clogged or dirty Air filter.
- Water pipe flow has been restricted.
- Expansion and shrinkage of plastic and metal parts
when they are heated or cooled. Normal
- Noise of relay, valve and/or Fan motor. Normal.
- POWER switch has been turned off while Child
Lock is turned on.
- Hot water is flowing into the unit. Normal
- When the temperature of the circulation water is
between 100˚F (38˚C) and 110˚F (43˚C), the unit will
operate at the low fan speed only.
- The Air filter is clogging.
- Indicating that the power failure occurred. To stop
the blinking power lamp, press any button once.
ERROR CODE CAUSE
Short-circuit of the Water thermistor
Electrical power supplied to unit has
abnormal Hz or frequency.
(Less than 45 Hz or more than 65 Hz)
Water thermistor is disconnected.
Water temperature too low
POWER switch was pressed at the time
power was restored.
SOLUTION
Consult your dealer.
Check power supply.
Main circuit board malfunction.
Consult your dealer.
Boiler malfunction.
Circulation pump malfunction.
Consult your dealer. (If the boiler and the
circulation pump are not malfunction)
Press POWER switch, if it does not
correct then Power Switch is defected.
SECTION J:
TROUBLESHOOTING
e- 03
f- 0
e- 08
e-13
e- 40

17
RE. # PART # DESCRIPTION RE. # PART # DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
20477046
20477032
20477069
20477003
20477004
20477017
20477144
20477074
20477012
20478379
20477076
20477020
20477066
20477040
20477073
20477075
20477035
20477029
20477014
20477015
20477039
20455850
20477062
20477051
20477052
20474050
20474051
20476459
20455862
20477084
20476454
20477086
20477195
20477199
Front panel
Louver assembly
Fan motor assembly/ Capacitor
Fan capacitor
Fan cross assembly
Transformer
Heat exchanger assembly
Water temp. thermistor
Main circuit board
Fuse 2 (5A)
Lamp circuit board
Top / Side panel
Rear panel
Filter
Room temp. thermistor
Room thermistor cover
Power supply cord
Base assembly
Switch terminal block
Power terminal block
Rubber bushing
Hole plug
Wall bracket
Bleeder screw
FFC ribbon cable
Screw C
Screw D
Screw B7
Screw S2
Screw F5
Screw B4
Screw D4
Instruction manual
Carton
RE. # PART # DESCRIPTION
26
26
26
26
26
11
26
25
26
23
29
29
14
29
31
29
24
32
21
19
22
29
29
28
29
A
26
12
16
13
15
A
B17
528
26
9
10
7
6
26
26
20
30
27
31
26
84
27
3
26
27
26
1
2
18
29
26
26
26
B
PRODUCT REGISTRATION
To register your product please visit our website at www.toyotomiusa.com/productRegistration.php or scan the
QR code on your smart device.
Make a note of your heater's serial and lot number, located on the side of the cabinet.
Your heater's serial and lot number:
SERIAL NO.

RE. # PART # DESCRIPTION RE. # PART # DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
20477046
20477032
20477069
20477003
20477004
20477017
20477144
20477074
20477012
20478379
20477076
20477020
20477066
20477040
20477073
20477075
20477035
20477029
20477014
20477015
20477039
20455850
20477062
20477051
20477052
20474050
20474051
20476459
20455862
20477084
20476454
20477086
20477195
20477199
Front panel
Louver assembly
Fan motor assembly/ Capacitor
Fan capacitor
Fan cross assembly
Transformer
Heat exchanger assembly
Water temp. thermistor
Main circuit board
Fuse 2 (5A)
Lamp circuit board
Top / Side panel
Rear panel
Filter
Room temp. thermistor
Room thermistor cover
Power supply cord
Base assembly
Switch terminal block
Power terminal block
Rubber bushing
Hole plug
Wall bracket
Bleeder screw
FFC ribbon cable
Screw C
Screw D
Screw B7
Screw S2
Screw F5
Screw B4
Screw D4
Instruction manual
Carton
RE. # PART # DESCRIPTION
26
26
26
26
26
11
26
25
26
23
29
29
14
29
31
29
24
32
21
19
22
29
29
28
29
A
26
12
16
13
15
A
B17
528
26
9
10
7
6
26
26
20
30
27
31
26
84
27
3
26
27
26
1
2
18
29
26
26
26
B
PRODUCT REGISTRATION
To register your product please visit our website at www.toyotomiusa.com/productRegistration.php or scan the
QR code on your smart device.
Make a note of your heater's serial and lot number, located on the side of the cabinet.
Your heater's serial and lot number:
SERIAL NO.

Part #20477195 Printed in Japan
TOYOTOMI U.S.A., INC.
604 Federal Road, Brookfield, CT 06804
www.toyotomiusa.com
TOYOTOMI U.S.A., INC.("TOYOTOMI") warrants each product and any parts thereof sold by it to be free from defects in
materials or workmanship under normal use and service for TWELVE (12) MONTHS* from the date of delivery to the original
purchaser at retail subject to the following terms and conditions :
WHAT IS COVERED : Product or any parts thereof which are defective in materials of workmanship.
WHAT IS NOT COVERED :
(1) This warranty does not extend to any defect due to the negligence of others: failure to install, operate, or maintain unit in
accordance with instructions (Installation and Operation instructions are furnished with each new unit); unreasonable use;
accidents; alteration, use of unauthorized or non-standardized TOYOTOMI parts and accessories; electrical malfunction, i.e.,
as resulting from large power surges, short circuit, etc.; incorrect installation; or repair by anyone other than a service facility
specified by TOYOTOMI.
(2) Normal wear and tear of parts, including hoses, wires, filters and accessories.
(3) This warranty does not cover shipping costs.
WHO IS COVERED : The original purchaser at retail.
WHAT WE WILL DO : TOYOTOMI will either repair or replace, at its option, all defective parts free of charge that are covered
by this limited warranty on a carry-in basis, to your nearest authorized dealer or distributor of TOYOTOMI.
WHAT YOU MUST DO FOR WARRANTY SERVICE : You must return the defective Product or part to any authorized dealer or
distributor of TOYOTOMI with this LIMITED WARRANTY and a copy of your bill of sale or credit card charge receipt or other
documents evidencing the date of the Product's delivery, if service is not available locally, please contact our CUSTOMER
RELATIONS DEPARTMENT at :
TOYOTOMI U.S.A., INC.
604 Federal Road, Brookfield, CT 06804
[phone]
THE FOREGOING EXPRESSES ALL OF TOYOTOMI'S OBLIGATIONS AND LIABILITIES WITH RESPECT TO THE QUALITY OF
PRODUCT FURNISHED BY IT. ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. TOYOTOMI SHALL NOT BE LIABLE
FOR THE LOSS OF USE OF THE PRODUCT, INCONVENIENCE, LOSS OR ANY OTHER DAMAGES, DIRECT OR
CONSEQUENTIAL ARISING OUT OF, THE USE OF, OR INABILITY TO USE, THE PRODUCT OR DAMAGES RESULTING FROM
OR ATTRIBUTABLE TO DEFECTS IN THE PRODUCT.
No one other than TOYOTOMI has authority to extend or modify the terms of this Limited Warranty in any manner whatsoever.
Some states or provinces do not allow the exclusion or limitation of incidental or consequential damages or limitations on how
long an implied warranty lasts, so these limitations or exclusions may not apply to you. This Limited Warranty gives you
specific legal rights and you may also have other rights that vary from state to state, or province to province.
* In addition to the warranty period stated above, an extended two (2) year warranty (3 years from date of purchase) is on for
the following parts. :
1.Heat Exchanger
NOTE : THE EXTENDED WARRANTY POLICY IS APPLICABLE ONLY FOR THE REPLACEMENT OF THE ORIGINAL
FACTORY-INSTALLED PARTS THAT HAVE FAILED WITHIN THE TIME LIMITATIONS AS INDICATED. REPLACEMENT
PARTS ARE WARRANTED FOR THE REMAINDER OF THE ORIGINAL PART WARRANTY PERIOD. LABOR IS NOT
COVERED ON THE EXTENDED WARRANTY.
2718003000
LIMITED WARRANTY
New 05/21