Toyotomi HC-20 User manual

MODEL HC-20

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

HC-20_US.qxd 14.7.1 9:13 ページ a

Model: HC-20

Type: Hot Water Heating, Floor Standing Type

Heat Rating Range: 3,000 to 20,000 BTU/h (0.88 to 5.9 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: 39 dBA Med: 28 dBA Low: 19 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 x H x D): 28-3/8” x 15-1/4” x 7-3/16” (720 x 387 x 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

GPM (L/min) Fan Speed

Circulation Water Volume Temperature of Circulation Water

GPM (L/min) Fan Speed

Circulation Water Volume Temperature of Circulation Water

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)

Low 2939 BTU 3646 BTU 4353 BTU 5059 BTU 5766 BTU 6473 BTU 7179 BTU 7886 BTU

0.5 GPM (1.89 L/min) Medium 5081 BTU 6099 BTU 7116 BTU 8133 BTU 9151 BTU 10168 BTU 11185 BTU 12203 BTU

High 6002 BTU 7368 BTU 8733 BTU 10099 BTU 11464 BTU 12830 BTU 14195 BTU 15561 BTU

Low 3429 BTU 4105 BTU 4780 BTU 5456 BTU 6132 BTU 6808 BTU 7484 BTU 8160 BTU

1 GPM (3.79 L/min) Medium 5932 BTU 7096 BTU 8260 BTU 9424 BTU 10588 BTU 11752 BTU 12916 BTU 14080 BTU

High 7561 BTU 9155 BTU 10749 BTU 12344 BTU 13938 BTU 15532 BTU 17126 BTU 18720 BTU

Low 3866 BTU 4532 BTU 5198 BTU 5863 BTU 6529 BTU 7195 BTU 7860 BTU 8526 BTU

1.5 GPM (5.68 L/min) Medium 6485 BTU 7956 BTU 9427 BTU 10899 BTU 12370 BTU 13841 BTU 15313 BTU 16784 BTU

High 8305 BTU 9998 BTU 11691 BTU 13385 BTU 15078 BTU 16771 BTU 18464 BTU 20158 BTU

(BTU)

Room Temperature: 68˚F (20˚C)

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)

Low 0.87 kW 1.08 kW 1.28 kW 1.49 kW 1.70 kW 1.91 kW 2.11 kW 2.32 kW

0.5 GPM (1.89 L/min) Medium 1.50 kW 1.80 kW 2.10 kW 2.40 kW 2.70 kW 2.99 kW 3.29 kW 3.59 kW

High 1.77 kW 2.17 kW 2.57 kW 2.97 kW 3.37 kW 3.77 kW 4.17 kW 4.57 kW

Low 1.01 kW 1.21 kW 1.41 kW 1.61 kW 1.81 kW 2.00 kW 2.20 kW 2.40 kW

1 GPM (3.79 L/min) Medium 1.75 kW 2.09 kW 2.43 kW 2.78 kW 3.12 kW 3.46 kW 3.80 kW 4.14 kW

High 2.23 kW 2.70 kW 3.16 kW 3.63 kW 4.10 kW 4.57 kW 5.03 kW 5.50 kW

Low 1.14 kW 1.34 kW 1.53 kW 1.73 kW 1.92 kW 2.12 kW 2.31 kW 2.51 kW

1.5 GPM (5.68 L/min) Medium 1.91 kW 2.35 kW 2.78 kW 3.21 kW 3.64 kW 4.07 kW 4.50 kW 4.93 kW

High 2.45 kW 2.94 kW 3.44 kW 3.94 kW 4.43 kW 4.93 kW 5.42 kW 5.92 kW

(kW)

Room Temperature: 68˚F (20˚C)

SECTION A:

SPECIFICATIONS

HC-20_US.qxd 14.7.1 9:13 ページ 1

Operation panel Front panel Air filter

External output

(for circulation control or zone valve)

Main circuit board

Transformer

Thermistor

(Water Temperature)

Air release screw

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

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

HC-20_US.qxd 14.7.1 9:13 ページ 2

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

HC-20_US.qxd 14.7.1 9:13 ページ 3

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 12 in.

(1 ft.)

Not less

than 4 in.

SECTION D:

INSTALLATION

HC-20_US.qxd 14.7.1 9:13 ページ 4

Supply opening NPT 1/2” Female Return opening NPT 1/2” Female

Air Release Screw

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.

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.

HC-20_US.qxd 14.7.1 9:13 ページ 5

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

HC-20_US.qxd 14.7.1 9:13 ページ 6

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

90W

10mA 5VDC

External output terminal

Cover

24 VAC

Note: Use at least

AWG 18 wire.

POWER SUPPLY

120VAC

CIRCULATION

WATER PUMP

HC-20_US.qxd 14.7.1 9:13 ページ 7

Air release screw

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)

DIGITAL DISPLAY

SECTION E:

OPERATING CONTROLS AND PART NAMES

HC-20_US.qxd 14.7.1 9:13 ページ 8

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:

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.

HC-20_US.qxd 14.7.1 9:13 ページ 9

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