Toyotomi NS-2800 Service Manual
  1. Manuals
  2. Brands
  3. Toyotomi Manuals
  4. Heater
  5. Toyoset NS-2800
  6. Service manual
Toyotomi NS-2800 Service Manual

Toyotomi NS-2800 Service Manual

Cabin heater
Hide thumbs Also See for NS-2800:
Table of Contents

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
CABIN HEATER
MODEL NS-2800
TOYOTOMI CO., LTD.
NAGOYA JAPAN

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the NS-2800 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Toyotomi NS-2800

Summary of Contents for Toyotomi NS-2800

  • Page 1 SERVICE MANUAL CABIN HEATER MODEL NS-2800 TOYOTOMI CO., LTD. NAGOYA JAPAN...

  • Page 2: Table Of Contents

    Table of Contents Section 1: Description …………………………………………………………… 5 1-1. Introduction Physical Specifications ……………………………………………… 5 1-2. Description of Functions ……………………………………………. 5 1-3. ………………………………………………………… 6 1-4. Components ………………………………………………… 6 1-5. Combustion System ………………………………………………………… 7 1-6. Heat Chamber ………………………………………………………………… 7 1-7. Burner …………………………………………………………… 7 1-8.
  • Page 3 Section 3: Operation …………………………………………………………… 14 3-1. Introduction …………………………………………… 14 3-2. Operating Specifications ………………………… 15 3-3. Operating Controls and Monitor Lamps ……………………………………………………………… 16 3-4. Operation …………………………………………………… 16 3-5. Turning Heater Off ………………………………………… 16 3-6. Room Temperature Sensor …………………………………………… 17 3-7. Power Failure Recovery Overheat Recovery ……………………………………………………...
  • Page 4 Section 7: Disassembly Procedure …………………………………………………………… 34 7-1. Introduction ………………………………………………… 34 7-2. Cabinet and Panels ………………………………………………………………… 35 7-3. Igniter ……………………………………………………………… 35 7-4. Fuel Pipe …………………………………………………………… 35 7-5. Fuel Nozzle …………………………………………………………… 36 7-6. Fuel Pump …………………………………………………………………… 36 7-7. Fuse Transistor ……………………………………………………………… 36 7-8.

  • Page 5: Section 1: Description

    The following section outlines the Laser Heater and its various components. 1-2. Physical Specifications Listed below are the physical specifications that apply to the CABIN HEATERS. Model: NS-2800 Dimensions (WxDxH): 410 mm x 190 mm x 315 mm (16-1/8”x7-1/2”x12-3/8”) Weight: 9.0 kg (20 lbs.) Flue Pipe: Outer nominal: 50 mm (2 in.)

  • Page 6: Components

    1-4. Components The cabin heater is composed of the following: 1-5. Combustion System The combustion system maintains the room temperature at the desired temperature. In the combustion system a mixture of fuel and air is burned to produce heat. Air is drawn from outside the dwelling to the burner.

  • Page 7: Heat Chamber

    1-6. Heat Chamber The combustion assembly consists of two main parts; one is the heat chamber and the other is the burner. The heat chamber is a cylinder which is secured to the burner. The heat chamber has a window, allowing the serviceman to visually examine the combustion process (i.e.

  • Page 8: Forced Flue Vented System

    1-13. Forced Flue Vented System The combustion air system channels air to and from the heater. Outside air is drawn into the heater by the combustion blower through the flue pipe and is blown into the bottom of the burner. It then combines with the vaporized fuel and ignites. As the heated air passes through the heat exchanger, a blower fan blows air past the heat exchanger and out again into the room from the heated air outlet.

  • Page 9: Fuel Tank

    1-18. Fuel Tank The tank should contain a fuel strainer and a vent. 1-19. Solenoid Fuel Pump The solenoid fuel pump is located on the bottom part of the unit. 1-20. Electrical System All electronic diagrams, such as the wiring diagram, the circuit board layout, and the electrical schematic can be found in this service manual.

  • Page 10: Overheat Protector Switch (High Limit Switch)

    1-26. Overheat Protector Switch (High Limit Switch) This switch is rated at 90°C (195°F). Should the heater overheat (internal temperature rises beyond 90°C (195°F)), the overheat protector switch (also called a high limit switch) will open to shut off the heater. The power lamp will simultaneously flash. The overheat protector switch will automatically reset after the heater has cooled down.

  • Page 11: Section 2: Installation

    Section 2: Installation 2-1. Introduction This section contains all relevant installation information including; Installation specifications Alternative types of venting systems and installation procedures for each Basic requirements for fuel tank installation The heater can be located almost anywhere within the dwelling provided that electrical, fuel and exhaust specifications are met.

  • Page 12: Building And Boat Safety Codes

    - WARNING - Installation of any fuel tank must comply with all local standards, building and/or boat safety codes. 2-5. Building and Boat Safety Codes Fire regulations, local building codes, and boat safety codes may govern the installation and use of a vented heater and related fueling systems. Prior to installation, check and comply with all codes.

  • Page 13: Fuel Tank Installation

    2-8. Fuel Tank Installation Fuel tank installation is illustrated below. Since fuel tank installation techniques vary from place to place, use the following check list as a guide to the fuel storage facilities. 1. The fuel supply tube must be shorter than 1.5 m (5 ft.). 2.

  • Page 14: Section 3: Operation

    Section 3: Operation 3-1. Introduction The NS-2800 is an easy-to-operate vented heater. Routine operation features automatic adjustment of room temperature, low fuel and power consumption. This section provides all information necessary to operate the Laser Heating System. All operation procedures specified should be performed in the order in which they are described.

  • Page 15: Operating Controls And Monitor Lamps

    3-3. Operating Controls and Monitor Lamps The remote control switch is used to operate the heater and allow the user to monitor its performance. (1) HEAT Switch: In the “ON” position, the heater begins its operation. The power monitor lamp will be lit.

  • Page 16: Operation

    3-4. Operation Push in the HEAT switch to the “ON” position. (Vent switch is “OFF” position.) The power monitor lamp will be lit and the igniter will glow red. 12 seconds later the blower motor and the fuel pump start in the low mode. The blower motor repeats the process with 17.5 seconds of operation and 2.5 seconds off until combustion starts when the flame lamp is lit.

  • Page 17: Power Failure Recovery

    3-7. Power Failure Recovery When an electric power failure occurs while the heater is in operation, all electrical systems will be automatically shut off. When the power is restored, the heater automatically reignites and operates. 3-8. Overheat Recovery The heater is protected against damage resulting from an overheat condition by 90°C (195°F) automatic reset thermostat (overheat protector switch).

  • Page 18: Section 4: Maintenance

    Section 4: Maintenance 4-1. Introduction The maintenance is divided into two classifications; routine maintenance, which is required to keep the heater in good condition; and repairing and adjustment, which is necessary to correct malfunctions. 4-2. Routine Maintenance The maintenance schedule provided in Table below describes the tasks that must be performed periodically for optimum heater performance.

  • Page 19: Inspection Of Exhaust/Air Lines

    TASK 7: Clean the igniter Remarks: Scrape any carbon deposits from igniter. WARNING: Be careful when you remove igniter, it may be stuck. Excessive force may crack the igniter. TASK 8: Check air line and blower motor assembly. (at least every year) Remarks: Replace the air line if it is worn or broken.

  • Page 20: Fuel Contamination

    (2) Visual Inspection A. Push in the HEAT switch to “ON”. B. Look downward through the peep window on the heat chamber. Verify that igniter is glowing. If the igniter does not glow, something is wrong. Refer to Troubleshooting in Section 6 of this service manual to solve the problem. (3) Reassembly of Heater;...

  • Page 21: Section 5: Component Specifications And Adjustments

    Section 5: Component Specifications and Adjustments 5-1. Main Circuit Board When a malfunction or defect in the main circuit board is suspected, first check the connectors. Check this point first of all, especially if the exact cause cannot be determined. 5-2.

  • Page 22: Fuel Pump

    5-4. Fuel Pump (1) Dust or contaminants sucked into the fuel pump will reduce pumping capacity. Always install the fuel strainer. (2) Dust or contaminants sucked into the fuel pump will reduce pumping capacity. The initial setting of the fuel pump flow rate for shipment is ±0%. For smooth adjustment, reduce the flow rate 6% when the flue pipe is extended 0.5m, 12% for 1.0m extension, and 18% for 1.5m.

  • Page 23: High Limit Switch

    5-6. High Limit Switch (1) This switch is a bimetal switch and designed to shut off combustion to avoid damage when the inside temperature of the unit is over 90°C (195°F). The circulation fan will continue to run after the combustion stops. (2) Specification: Open at 90°C ±...

  • Page 24: Section 6: Troubleshooting Guide

    Section 6: Troubleshooting Guide 6-1. Troubleshooting Guide I All lamps are not lit when turning on. Is wiring correct? Correct wiring (*) Red wire: (+) Black wire: (-) Check fuse. Change fuse Check battery. Recharge or replace battery (DC 12V) Check the Disconnected terminal terminal ①.
  • Page 25 Extinguished and flame lamp flashes. Check fuel Refuel (Note 1) Water in fuel Drain water (Note 2) Check flame in Recharge or replace battery burner Fuel pump malfunction (Note 5) Igniter mounted incorrectly (Note 6) Blower motor malfunction Extension cord too long (Note 7) Check flame rod Check and clean flame rod...

  • Page 26: Troubleshooting Guide Ii

    6-2. Troubleshooting Guide II Note 1: In case of using a plastic tank, make sure that the strainer does not position above its fuel level. In case of the large size tank, make sure the valve is left “Open”. And also make sure tightened, the insert cap nut (on the suction side of fuel pump) is unloosen.

  • Page 27: Troubleshooting Guide Iii

    4. Unscrew the “F” cap nut (on the suction side of the fuel pump) and that on the discharge side of the pump to disconnect their respective pipe. Sufficient care must be taken not to contaminate these connection areas with dust. 5.

  • Page 28: Troubleshooting Guide Iv

    6-4. Troubleshooting Guide IV Extinguished and Always extinguishes Yes Burner thermistor mal- vent lamp and flame in 22 minutes after function or disconnected lamp flash. Ignition. wiring (Note 1) In case of occasional extinguishments, flue pipe or flue pipe top is in wrong position.

  • Page 30: Troubleshooting Guide V

    6-5. Troubleshooting Guide V Extinguished and Check the power Yes Check the terminal Yes Igniter mal- power lamp and voltage. ⑱ of igniter. function (Note 1) flame lamp flash. Disconnected terminal Power voltage too high (more than DC 17V) (Note 2) Note 1: In the event the igniter is disconnected, push into the HEAT switch to ON position, so the power lamp and flame lamp start flickering at the same time to discontinue the operation.

  • Page 31: Troubleshooting Guide Vi

    Note: The flange used for assembling the igniter is easily breakable. The screws in four positions should be slowly fastened by turns. In case the flange is broken, heated air is contaminated with raw gas, generating odors. If the broken flange must be used, apply heat resistive putty (which is a repair putty for automobile muffler) to the...

  • Page 32: Troubleshooting Guide Vii

    Extinguished and power High limit switch activated lamp flashes. (Note 1) Note 1: An abnormal overheat caused in the inside of the heater may induce operation. The high limit switch is activated at 90°C (194°F), but no operation restart can be made until the temperature reaches 70°C (158°F).
  • Page 33 Motor trouble If the motor starts at the same time as the power is connected, the transistor must be defective. (See item 1-4 Components.) Also, in case the motor does not work as specified in its operation sequence, the blower motor or the motor controller must be defective.

  • Page 34: Section 7: Disassembly Procedure

    Section 7: Disassembly Procedure 7-1. Introduction This section shows how to disassemble and reassemble the unit for servicing, maintenance and repair. Turn heater off and disconnect the power cord from the battery and allow the heater to cool down. Then disassemble the heater. Remove the air ducts, flue pipes and the fuel tube from the unit and dismount the unit from the hanger by removing the two hexagonal bolts (13mm, 1/2 in.).

  • Page 35: Igniter

    7-3. Igniter (1) Remove four (4) screws to remove the front panel. (2) Remove four (4) screws to remove the igniter. CAUTION: When reassembling: (1) Be sure the end of the igniter is in the proper position. (2) Be careful not to tighten screws too tight. The ceramic may crack.

  • Page 36: Fuel Pump

    7-6. Fuel Pump (1) Remove the cabinet B. Remove the nut of the fuel pipe. (2) Remove one (1) screw fixing the fuel pump to the base. (3) Lift and remove the fuel pump. CAUTION: Be careful to prevent dust from being sucked into the pump.

  • Page 37: Main Circuit Board

    7-10. Main Circuit Board (1) Unfasten all the connectors on the main circuit board. (2) Remove the main circuit board by squeezing four (4) PCB supporters with pliers. (3) The same number is printed on each pair of connectors to avoid incorrect connection. 7-11.

  • Page 38: Heat Chamber And Flame Rod

    7-12. Heat Chamber and Flame Rod (1) Unfasten the lead wire from the flame rod. (2) Remove two (2) screws fixing the top air duct to the heat chamber and the burner, and remove one (1) screw fixing the top air duct to the blower motor case.

  • Page 39: Burner Ring

    7-13. Burner Ring (1) Lift up the burner ring slightly and turn to left with pliers. CAUTION: When reassembling: (1) Ensure that three (3) burner side pins are correctly engaged with the bottom of the burner ring. 7-14. Burner Mat (1) The burner mat is attached with heatproof adhesive (BETAC, Part #20474926) on the burner bottom.

  • Page 40: Blower Motor Assembly

    (2) Remove the burner thermistor with a double wrench. CAUTION: Never bend or twist the lead wire of the burner thermistor when disassembling or reassembling since it is made of glass wire and is very fragile. 7-17. Blower Motor (1) Remove three (3) screws from the blower motor assembly.
  • Page 41 (5) Remove five (5) screws from the blower case. (6) Pull off the blower fan from its shaft by turning the nut clockwise. (7) Pull off the circulation fan from its shaft by turning the nut counterclockwise. (8) Remove three (3) screws from the blower base. (9) Remove three (3) screws from the blower motor.

  • Page 42: Section 8: Circuit Board Specifications

    Section 8: Circuit Board Specifications 8-1. Wiring Diagram...

  • Page 43: Time Chart

    8-2. Time Chart...

  • Page 44: Section 9: Parts Description

    Section 9: Parts Description 9-1. Exploded View...

  • Page 45: Parts List

    9-2. Parts List REF # PART # PART NAME REF # PART # PART NAME 17196384 Cabinet A assembly 17185543 Air pipe 17196385 Cabinet B assembly 17185508 Tank cap 17196346 Front panel 17185524 Tank cap adapter 17196363 Rear panel 17185330 Insert cap nut 17196323 Remote control with thermostat 17185335 Sleeve 17185572 Circulation fan...

  • Page 46: Accessories

    9-3. Accessories...
  • Page 47 TOYOTOMI U.S.A., INC. P.O. Box 176, 604 Federal Road Brookfield, CT 06804-0176 Rev. 2/03 Printed in United States...

Table of Contents