Rinnai RHFE-1005FDT Service Manual

High efficiency power flued gas space heater

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Operation & installation manual (28 pages)

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SERVICE MANUAL

High Efficiency Power Flued Gas Space Heater

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really really

important

This information is being made available to qualified tradespeople

such as licensed gasfitters & plumbers. It is not intended for use by

non-qualified people or members of the public.

Gas appliances MUST BE serviced by an authorised person, being

in New Zealand a licensed gasfitter, in accordance with the

manufacturers's service instructions and all applicable local rules

and regulations.

Please note: Only the information relating to the 1005FT model

should be used as the 1005FDT model is not sold in New Zealand.

ENERGYSAVER

RHFE-1005FDT / FT

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Summary of Contents for Rinnai RHFE-1005FDT

Page 1 ENERGYSAVER RHFE-1005FDT / FT SERVICE MANUAL High Efficiency Power Flued Gas Space Heater This information is being made available to qualified tradespeople such as licensed gasfitters & plumbers. It is not intended for use by non-qualified people or members of the public.
Page 2 • DO NOT MODIFY THIS APPLIANCE This manual has been compiled by Rinnai Australia Engineering & Technical Department. While many individuals have contributed to this publication, it will be successful only if you - the reader and customer - find it useful.
Page 3 All Rinnai products are certified by the  Australian Gas Association as compliant to relevant Australian Standards. Rinnai New Zealand has been certified to ISO 9001 Quality Assurance by Telarc. All Rinnai products carry the “C Tick” symbol. This signifies compliance with...
Page 4: Table Of Contents
Table of Contents 1. Introduction ....................3 2. Dimensions ....................6 3. Cut-Away Diagram - RHFE-1005FDT ............7 4. Cut-Away Diagram - RHFE-1005FT ............. 8 5. Schematic Diagram ..................9 6. Control Panel Layout .................. 10 7. Safety Devices ................... 12 8.
Page 5 (NO & NO overheat switch printed circuit board central processing unit potentiometer revolutions per minute solenoid valve ø diameter temperature rise above ambient modulating valve thermistor Programmable Electronic Systems Service Manual Energysaver RHFE-1005FDT/FT - 2 - ©Rinnai...
Page 6: Introduction
It is a room sealed forced exhaust appliance, to be used in conjunction with the Rinnai Co-Axial flue system. Gas flow is automatically controlled to deliver warmed room air until desired room temperature is reached. This appliance incorporates a PES for temperature/ gas control.
Page 7 Flueing: This appliance is designed and certified to use the Rinnai Co-Axial flue system only. The flue adaptor attaches is to the unit at the rear of the appliance using the connection pipe assembly for the hot gas discharge and plastic flexible tube connection for the cold air intake.
Page 8 The degree of opening of the gas valve is thus always correctly matched to the actual fan speed. Heat Exchanger: The heat exchanger is of a negative pressure type heat exchanger fabricated from aluminized/ coated steel. The heat exchanger is located after the combustion chamber. Service Manual Energysaver RHFE-1005FDT/FT - 5 - ©Rinnai...
Page 9: Dimensions
2. Dimensions Note: All dimensions are in millimetres Gas Inlet Gas Inlet Service Manual Energysaver RHFE-1005FT/FDT - 6 - ©Rinnai...
Page 10: Cut-Away Diagram - Rhfe-1005Fdt
3. Cut-Away Diagram - RHFE-1005FDT RHFE-1005FDT Service Manual Energysaver RHFE-1005FDT/FT - 7 - ©Rinnai...
Page 11: Cut-Away Diagram - Rhfe-1005Ft
4. Cut-Away Diagram - RHFE-1005FT Service Manual Energysaver RHFE-1005FDT/FT - 8 - ©Rinnai...
Page 13: Control Panel Layout
Indicates that the filter needs Indicates that the appliance Increases or decreases the cleaning (see page 13). is turned ON and whether temperature setting. Also used the burner is alight. to set Child /Functiom Lock. Service Manual Energysaver RHFE-1005FDT/FT - 10 - ©Rinnai...
Page 14 Indicates that the Economy mode is Indicates that the Child / Function been selected to operate. in operation. Lock is activated (see page 11). Indicates set temperature for the dual timer programme is being set. Service Manual Energysaver RHFE-1005FDT/FT - 11 - ©Rinnai...
Page 15: Safety Devices
"OFF", then "ON" again. If this happens repeatedly a service call is required. Electrical Fuse The electrical circuits are protected by an electric fuse. When the fuse blows, the heater will not operate. The fuse must be replaced by an authorised person. Service Manual Energysaver RHFE-1005FDT/FT - 12 - ©Rinnai...
Page 19 PCB adjusts gas, combustion fan & convection fan to suit. Used inconjunction with the Operational Flow Chart on previous page. = Action that needs / or input required by PCB to move to next segment of program Service Manual Energysaver RHFE-1005FDT/FT - 16 - ©Rinnai...
Page 20: Diagnostic Points
45~95V(Without front AC30~110V Convection Fan Red-Black panel) 20~60 38 (During Stop) Black-White 11.5V DC11~13V Black-Blue 38.8 (During Stop) 20~60 Yellow-Red DC3~17V Red-White DC5~13V, 77.5 60~90 220~260V Transformer Gray-Gray 10~30 85~130V White-White 5~15 Service Manual Energysaver RHFE-1005FDT/FT - 17 - ©Rinnai...
Page 21: Wiring Diagram - Rhfe1005Fdt
10. Wiring Diagram - RHFE1005FDT Service Manual Energysaver RHFE-1005FDT/FT - 18 - ©Rinnai...
Page 22: Wiring Diagram - Rhfe1005Ft
11. Wiring Diagram - RHFE1005FT Service Manual Energysaver RHFE-1005FDT/FT - 19 - ©Rinnai...
Page 23: Block Diagram - Rhfe-1005Fdt
12. Block Diagram - RHFE-1005FDT Service Manual Energysaver RHFE-1005FDT/FT - 20 - ©Rinnai...
Page 24: Block Diagram - Rhfe-1005Ft
13. Block Diagram - RHFE-1005FT Service Manual Energysaver RHFE-1005FDT/FT - 21 - ©Rinnai...
Page 27: Fault Finding
Is CRT fitted. Is 24VAC suppled to CRT. Central Relay Timer (CRT). Unit does not start If you are unsure about the way the unit is operating, contact Rinnai or your Service Agent Service Manual Energysaver RHFE-1005FDT/FT - 24 -...
Page 28 8. Power Failure 9 After power has been re-instated, restart operation manually. 9. Gas Type • Does the gas type match the specifications for this appliance. 9 Change to correct gas type model. Service Manual Energysaver RHFE-1005FDT/FT - 25 - ©Rinnai...
Page 29 The power cord is accidentally pulled out, Do not operate the appliance again until unit has cooled and although it is pushed in straight away down. and the appliance has been turned back on, ignition does not occur. Service Manual Energysaver RHFE-1005FDT/FT - 26 - ©Rinnai...
Page 30 1. Air in gas pipe. 2. Abnormal (primary) gas pressure. 3. Incorrect gas type. 4. Bent gas pipe. 5. Abnormal Sparker. 6. Injector blockage or incorrect specification. (MN, Governor test pressure, etc.) Service Manual Energysaver RHFE-1005FDT/FT - 27 - ©Rinnai...
Page 31 Check that the electrical current is stable and is above 1.0 A after ignite Not stable 1. Confirm governor test pressure, restrictor, injector, etc. specs. 2. Faulty flame rod and/or burner. Stable Faulty PCB Service Manual Energysaver RHFE-1005FDT/FT - 28 - ©Rinnai...
Page 32: Error Messages
Plants / cobwebs obstructing direct flue terminals. Materials placed against flue terminal. Damage to flue guard or vandalism to flue terminal / flue guard (Especially in schools). Service Manual Energysaver RHFE-1005FDT/FT - 29 - ©Rinnai...
Page 33 Check flue and condensate drain hose has correct fall. Check integrity of condensate trap in flue. Check for rain water entering combustion air side of flue or leak at roof penetration. Service Manual Energysaver RHFE-1005FDT/FT - 30 - ©Rinnai...
Page 34 No power to ignition PCB Check Power supply not available to spark ignition module. Check for voltage at module during ignition sequence or shorted. Service Manual Energysaver RHFE-1005FDT/FT - 31 - ©Rinnai...
Page 35 Test resistance. Refit or replace. E2PROM fails. * To reset error codes, press the ‘ON’ switch while the error code is showing. If the Error Message still remains or returns on the next operation, contact Rinnai. Service Manual Energysaver RHFE-1005FDT/FT - 32 - ©Rinnai...
Page 36: Faults That Do Not Show An Error Code
If gas pipe is installed through the wooden floor temperature sensor with an oversize hole, Energysaver thinks room is cold (due to cold draft from under floor) so heater works hard to meet temperature. Room will overheat. Service Manual Energysaver RHFE-1005FDT/FT - 33 - ©Rinnai...
Page 37: Function And Control
Eg: Room temperature on the display would be one degree lower than actual room temperature when 3 was set. The room temperature would be one degree higher than the temperature on the display. Service Manual Energysaver RHFE-1005FDT/FT - 34 - ©Rinnai...
Page 38: Conversion Procedure
17. Conversion Procedure All conversions must be carried out by an authorized person and in full accordance with the Conversion Instructions. (Refer to seperate document. Contact Rinnai. Service Manual Energysaver RHFE-1005FDT/FT - 35 - ©Rinnai...
Page 39: Commissioning Instructions
” buttons as required. 5. Press the ‘TEST SWITCH’ twice (three times for RHFE-1005FDT) on the PCB lock in the Gas Type and flue length. 6. At this point the gas pressure must be checked, refer to “Gas Pressure Checking Procedure”...
Page 40 The “Long” Flue is; where the flue length is greater than 3m with 1 bend up to a maximum length of 9m with a maximum of 3 x 90° bends. This is measured from the transition section. Please refer to Rinnai “Energysaver Space Heater Co-Axial Flue System Installation Manual for more details.
Page 41 Place the ‘+’ Port of Manometer BURNER PRESSURE TEST POINT - Place the ‘-’ Port of Manometer Fixed Time Period Operation Adjustment (Suits only RHFE-1005FDT) model 240 VOLTS, RISK OF ELECTRICAL SHOCK! ISOLATE THE ELECTRICITY SUPPLY BEFORE CONTINUING. W A R N I N G 1.
Page 42: Dismantling For Service
When servicing this unit, please make sure that flue integrity is checked, i.e. check for any corrosion of transition box and clear any deposit. NOTE Also check for any burn marks around the burner cover plate. Check that the drip catcher is fitted. Service Manual Energysaver RHFE-1005FDT/FT - 39 - ©Rinnai...
Page 43 Pan Head M4 with with captive star washer captive spring washer captive star washer To secure plastics, To secure air intake exhaust pipe tube Flat Head 8g - self taper Flat Head M4 Service Manual Energysaver RHFE-1005FDT/FT - 40 - ©Rinnai...
Page 44: Removal Of
Image shown on the right is the front panel. 2) Removal of Louvre a. Remove front panel, see section 1. b. Remove (3) screws to release louvre. c. Remove louvre. (3) screws Image shown on the right is the louvre. Service Manual Energysaver RHFE-1005FDT/FT - 41 - ©Rinnai...
Page 45: Removal Of Water Filter
Grip left and right hand side of humidifier tray, pull to release. Note: Be careful not to spill the water, if the water is in humidifier tray. Screw Image shown on the right is the humidifier tray. Service Manual Energysaver RHFE-1005FDT/FT - 42 - ©Rinnai...
Page 46: Removal Of Main Pcb
Image shown on the right is bottom flame rod. Image shown on the right is the Main PCB. (4) pins Image shown on the right is the igniter. Image shown on the right is the electrode. Service Manual Energysaver RHFE-1005FDT/FT - 43 - ©Rinnai...
Page 47: Removal Of Igniter
Image shown on the right is bottom flame rod. (4) pins (4) pins Image shown on the right is the igniter. Image shown on the right is the igniter. Image shown on the right is the electrode. Service Manual Energysaver RHFE-1005FDT/FT - 44 - ©Rinnai...
Page 48: Removal Of Bottom Flame Rod And Electrode
Image shown on the right is the electrode. Image shown on the right is the electrode. (9) screws f. Unscrew (2) screws to release burner assembly. Pull forward burner assembly and remove. (2) screws Service Manual Energysaver RHFE-1005FDT/FT - 45 - ©Rinnai...
Page 49: Removal Of Top Flame Rod
Image shown on the right is the igniter. (9) screws Image shown on the right is the electrode. f. Unscrew (2) screws to release burner assembly. Pull forward burner assembly and remove. (2) screws Service Manual Energysaver RHFE-1005FDT/FT - 46 - ©Rinnai...
Page 50: Removal Of Burner And Manifold
Unscrew (2) screws to release burner assembly. Pull forward burner assembly f. Unscrew (2) screws to release burner and remove. assembly. Pull forward burner assembly and remove. (2) screws (2) screws Service Manual Energysaver RHFE-1005FDT/FT - 47 - ©Rinnai...
Page 51 Image shown on the right is the igniter. (9) screws Image shown on the right is the electrode. f. Unscrew (2) screws to release burner assembly. Pull forward burner assembly and remove. (2) screws Service Manual Energysaver RHFE-1005FDT/FT - 48 - ©Rinnai...
Page 52 Image shown on the right is the electrode. f. Unscrew (2) screws to release burner Image shown on the right is the heat shield assembly. Pull forward burner assembly board. and remove. (2) screws Service Manual Energysaver RHFE-1005FDT/FT - 49 - ©Rinnai...
Page 53: Removal Of Gas Control Assembly And Gas Inlet
(4) pins (2) screws Image shown on the right is the igniter. Right picture is the gas control assembly. Image shown on the right is the electrode. Service Manual Energysaver RHFE-1005FDT/FT - 50 - ©Rinnai...
Page 54: Removal Heat Shield Board And Thermal Fuse
Image shown on the right is the thermal fuse. (4) pins Image shown on the right is the igniter. Image shown on the right is the electrode. Image shown on the right is the heat shield board. Service Manual Energysaver RHFE-1005FDT/FT - 51 - ©Rinnai...
Page 55: Removal Of Left Side Panel
Image shown on the right is the left side panel. Image shown on the right is bottom flame rod. (4) pins Image shown on the right is the igniter. Image shown on the right is the electrode. Service Manual Energysaver RHFE-1005FDT/FT - 52 - ©Rinnai...
Page 56: Removal Of Room Thermistor
(4) pins Connector Image shown on the right is the igniter. Image shown on the right is the room Image shown on the right is the electrode. thermistor. It’s combined with thermal fuse. Service Manual Energysaver RHFE-1005FDT/FT - 53 - ©Rinnai...
Page 57: Removal Of Combustion Fan Assembly
Image shown on the right is bottom flame rod. (4) pins Image shown on the right is the igniter. (4) screws Image shown on the right is the electrode. Image shown on the right is the combustion fan assembly. Service Manual Energysaver RHFE-1005FDT/FT - 54 - ©Rinnai...
Page 58: Removal Right Side Panel
Remove front panel, see section 1. b. Remove (5) screws to release right side panel. c. Pull forward to remove right side panel. (5) screws Image shown on the right is the side panel. Service Manual Energysaver RHFE-1005FDT/FT - 55 - ©Rinnai...
Page 59: Removal Of Top Panel
(5) screws (4) pins Image shown on the right is the igniter. Image shown on the right is the electrode. Image shown on the right is the top panel. (In case of RHFE-1005FDT) Service Manual Energysaver RHFE-1005FDT/FT - 56 - ©Rinnai...
Page 60: Removal Of Control Panel Pcb
High tension cord Fasten terminal rod. High tension cord Clips In case of RHFE-1005FDT b. Unscrew (5) screws to remove control panel PCB, and remove small LED PCB e. Pinch (4) pins to remove igniter. from two clips. Image shown on the right is bottom flame rod.
Page 61: Removal Of Convection Fan Assembly
Image shown on the right is bottom flame rod. (4) pins Image shown on the right is the igniter. Image shown on the right is the convection Image shown on the right is the electrode. fan assembly. Service Manual Energysaver RHFE-1005FDT/FT - 58 - ©Rinnai...
Page 62: Removal Of Heat Exchanger
(4) pins (3) screws Rubber tube Image shown on the right is the igniter. i. Unscrew (4) screws to remove combustion Image shown on the right is the electrode. chamber connection. (4) screws Service Manual Energysaver RHFE-1005FDT/FT - 59 - ©Rinnai...
Page 63 Image shown on the right is bottom flame rod. (4) pins Image shown on the right is the igniter. Image shown on the right is the heat Image shown on the right is the electrode. exchanger. Service Manual Energysaver RHFE-1005FDT/FT - 60 - ©Rinnai...
Page 64: Contact Points
Tel: (03) 9271 6625 Fax: (03) 9271 6622 Rinnai has a Service and Spare Parts network with personnel who are fully trained and equipped to give the best service on your Rinnai appliance. If your appliance requires service, please call our National Help Line. Rinnai recommends that this appliance be serviced every 2 years.

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Rhfe-1005ft