Rinnai ENERGYSAVER RHFE-308FTR Service Manual

High efficiency power flued gas space heater

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Page 1 ENERGYSAVER RHFE-308FTR SERVICE MANUAL High Efficiency Power Flued Gas Space Heater...
Page 2 Distributed and serviced in Australia under a Quality System certified as complying with ISO 9002 by Quality Assurance Services. Rinnai New Zealand has been certified to ISO 9001 Quality Assurance by Telarc. Certified to Australian Standard 3498 by Quality Assurance Services. Watermark certification is...
Page 3 Produced by Customer Technical Services July 1998 No portion or part of this manual may be copied without prior permission from Rinnai Australia. Rinnai Australia takes no responsibility for the accuracy or otherwise of information contained in this manual, and reserves the right to make modifications and change specifications without notice.
Page 4: Table Of Contents
21. Electrical Component Analysis ............... 36 22. Testing ......................40 23. Gas Conversion ..................42 24. Gas Pressure Setting Procedur ............... 43 25. Dismantling for servic ................44 26. Exploded Diagram ..................51 27. Parts List ..................... 56 Appendix......................59 Energysaver RHFE-308 FTR Rinnai...
Page 5: Glossary Of Terms And Symbols
(gauge pressure) oxides of nitrogen (NO & NO overheat switch printed circuit board central processing unit potentiometer revolutions per minute solenoid valve ø diameter ∆ modulating valve thermistor Energysaver RHFE-308 FTR ©Rinnai ...
Page 6: Introduction
PCB. Gas passes through the R½ 15 (BSP) inlet fitting, then via a flange connection to the solenoid valves N 1, N 2, a regulator modulating valve, aluminium injector manifold, before entering the burner. Energysaver RHFE-308 FTR - 1 - ©Rinnai...
Page 8: Specification
- 3 Amp fuse Fan delay - micro computer timer (Max 210 secs Pre-purge - combustion fan, pre-purge timer, spark sensor Room over heat - automatic cut off at 40 C after 10 mins Energysaver RHFE-308 FTR - 3 - ©Rinnai...
Page 10: Installatio
Flue fittings must be kept clear of flammabl In areas subject to heavy snowfall, keep snow materials. clear of flue terminal at all times. Energysaver RHFE-308 FTR - 5 - ©Rinnai...
Page 12: Performance Characteristics
6. Performance Characteristics 1. Basic Combustion Specification Item Specification Rinnai model number RHFE-308 FTR Gas typ Propane/LPG Gas consumption MJ/h Injector size (∅ mm) 1.30 0.90 Injector quantity Regulator pressure (kPa) 0.60 1.04 0.12 0.19 Burner marking Combustion method Bunsen burner...
Page 13 12.55 MJ/h Nominal input: 13 MJ/h Room temperature: (Unit ∆ Condition: < Low Combustion > Test gas: Natural Measured input: 5.27 MJ/h Nominal input: 5 MJ/h Room temperature: (Unit ∆ 4. Measurement Points Energysaver RHFE-308 FTR - 8 - ©Rinnai...
Page 14 8. Humidifier Capacity Method Tray Capacity Evaporation Evaporation 0.8 Litres 0.1 Litres/hour Note: Evaporation rate varies depending on conditions of use. Conditions: Standard setting: High combustion Measurement Method: According to JIS (Japanese Industrial Standard) Energysaver RHFE-308 FTR - 9 - ©Rinnai...
Page 16: Control Panel Layout
8. Control Panel Layout * Refer to “Appendix” on page 59 for explanation on setting clock and programming timers. Energysaver RHFE-308 FTR - 11 - ©Rinnai...
Page 17: Operating Principles
If the child lock is activated during normal operation, then no functions other than the ON/OFF Button will be operable until the lock is released. If the child lock is activated whilst the appliance is OFF, then the complete range of functions will be locked. Energysaver RHFE-308 FTR - 12 - ©Rinnai...
Page 18 9. Intelligent Timer [Pre Heat] This function enables the room to be heated to the pre-set temperature prior to the time programmed in the On Timer. See Intelligent Timer [Pre-heat]” on pa ge14 for more information. Energysaver RHFE-308 FTR - 13 - ©Rinnai...
Page 19: Intelligent Timer
The two timers can be programmed and used individually, or sequentially. Timer operation, once set, will remain on stand-by for the next day after the final OFF sequence, unless ON/OFF switch is pressed. Energysaver RHFE-308 FTR - 14 - ©Rinnai...
Page 20: Safety Devices
Thermistor Type Temperature Control Controls room temperature within the range of 16~26 C in 1 C steps. Energysaver RHFE-308 FTR - 15 - ©Rinnai...
Page 21 Once the overheat limit temperature has been sensed and the filter indicator begins flashing, it will not go out, even if the temperature falls below the limit. Note 2: Once the filter indicator begins flashing, gas input is limited to roughly 88% of high combustion. Energysaver RHFE-308 FTR - 16 - ©Rinnai...
Page 22 The fan rpm increases to compensate for a reduction in air flow due to a clogged air filter or other causes. The convection fan rpm is normally determined by combustion level. The speed increases by approximately 100 rpm at High. Energysaver RHFE-308 FTR - 17 - ©Rinnai...
Page 23: Operation Flow Chart
>1 Solenoids SV1, 2 close ON/Combustion Modulating Valve closes indicator flashes red Spark sensor Normal Combustion Fan OFF ON/Combustion Sparker OFF (After 1 sec) indicator flashes red Sparker OFF Combust'n fan (med) ON Energysaver RHFE-308 FTR - 18 - ©Rinnai...
Page 24 Modulating Valve Closed Combustion Fan OFF ON/Combustion indictor green Convection Fan MED ON (Less than 60 sec) Convection Fan OFF Room temp Room >Set temp > Set temp within 2 10 mins after d Energysaver RHFE-308 FTR - 19 - ©Rinnai...
Page 25 Timer indicator flashes Temperature Control Operation/Combustion Operates Indicator OFF Change from Room Normal operation start & Set Temp to clock All Indicators OFF Set-up Time Convection Fan (Less than 255 sec) Normal Operation Stops Energysaver RHFE-308 FTR - 20 - ©Rinnai...
Page 26: Diagnostic Points
Ω Ω Red - Red AC 25 ~ 50 V; 1 ~ 3 AC 25 ~ 50 V; 1 ~ 3 Grey - Grey AC 216 ~ 264 AC 207 ~ 253 V Energysaver RHFE-308 FTR - 21 - ©Rinnai...
Page 32: E2 Prom
However, if it is more than 100,000 times, then “H” is added to the beginning of the display. Operations will be rounded up to the nearest 1000. 99990~99999 times 100000~100999 times 101000~101999 times *Note: Estimated Number of Operations is the number of ON-OFF movements on the solenoid valve. Energysaver RHFE-308 FTR - 27 - ©Rinnai...
Page 33 • Preset Room Temperature (22 Current Value (HIGH) • ON Timer (06:00 am) • Convection Fan Supplement Current Value (LOW) • Estimated Combustion Time • Estimated Number of Operations This data can be deleted as described above. Energysaver RHFE-308 FTR - 28 - ©Rinnai...
Page 34: Error Coded Messag E
* To reset error codes, press the ON switch while the error code is showing. This will not reset error codes “71" and “73"; power needs to be reset to erase these codes. Energysaver RHFE-308 FTR - 29 - ©Rinnai...
Page 35: Fault Finding
--:-- * Power failure ( > 0.2 seconds ....8 † Error is displayed as room temperature LEDs flashing Energysaver RHFE-308FTR - 30 - ©Rinnai...
Page 36 There should be no articles within one (1) metre of the • The flue manifold behind appliance has not come front of the appliance. undone. ⇒ The products of combustion are leaving the appliance through the flue terminal. Energysaver RHFE-308FTR - 31 - ©Rinnai...
Page 37 Before contacting Rinnai, please check the following points. These points are part of the normal operation of the unit. At Ignition Is the heater plugged in? Is there a power failure? Have the fuse or breaker blown at the switchboard? Heater does not operate.
Page 38: Fault Analysis
The solenoids do not open, preventing gas flow to the burners. Open circuit or loose pin connectors on PCB or wiring loom. ii) Faulty solenoid, or coil. iii) Faulty sparker, (no spark is sensed). iv) Faulty PCB (no current to SV). Energysaver RHFE-308 FTR - 33 - ©Rinnai...
Page 39 1. Check combustion specification, gas Has the current risen above 1.0 µA. type, and gas pressure. 2. Check the combustion condition. 3. Check flame rod is firmly positioned. 4. Check the flame rod lead. Faulty PCB Energysaver RHFE-308 FTR - 34 - ©Rinnai...
Page 40 Flame faillure occurs between 2 and 3 minutes after ignition. “12” flshing. *Is the gas pressure normal? Is flame rod current greater than 1.0 µA? *Is the flame rod faulty? Combustion fan motor control may be faulty PCB faulty Energysaver RHFE-308 FTR - 35 - ©Rinnai...
Page 41: Electrical Component Analysis
(3) Is the transformer Check transformer (E) Red - Red Yes Replace PCB. secondary voltage. AC 24 - 41V No Replace transformer. (E) Black-Yellow AC 10 -17V (E) Blue-Yellow AC 130 - 180 V Energysaver RHFE-308 FTR - 36 - ©Rinnai...
Page 42 Check flame rod cir- (... 11 flashing) the flame rod (FR) Yellow flame rod cuit current. (Discon- No Replace flame rod. circuit >1.0 µA . >1.0 µA. nect, measure between connector and lead.) Energysaver RHFE-308 FTR - 37 - ©Rinnai...
Page 43 Note: If a problem is not remedied by replacing the appropriate part, the wiring harness is defective (short circuit, open circuit and/or defective connectors). Check for any short or open circuit. Lightly wiggle wires and harness to check for loose or faulty connectors. Energysaver RHFE-308 FTR - 38 - ©Rinnai...
Page 44: Testing
This means the combustion mode is in transition (eg. Changing from LOW MED). The indicators will glow steadily once combustion mode stabilises. (B) Test Mode 2 (Adjusting Modulating Valve) See “Gas Pressure Setting Procedure” on pag e43. Energysaver RHFE-308 FTR - 40 - ©Rinnai...
Page 45 8. Return operation to normal by pressing the test Displays temperature. mode SW (SW 5) again. Note: The convection fan rpm changes by approximately 10~15 rpm each time “\/” or “/\” SW is pressed. Energysaver RHFE-308 FTR - 41 - ©Rinnai...
Page 46: Gas Conversion
15. Connect main gas tube; take care with “O” ring. 16. Reconnect appliance to electricity and gas. 17. Follow gas pressure setting procedure, (see next page). 18. Check for gas escapes. Diagram 5 19. Replace front cover Diagram 6 Energysaver RHFE-308 FTR - 42 - ©Rinnai...
Page 47: Gas Pressure Setting Procedur
10. Press SW5 again to return the appliance to normal operation. 11. Turn the appliance OFF. 12. Disconnect the pressure gauge and replace the test point screw. Natural Gas Propane Gas HIGH 0.60 kPa 1.04 kPa 0.12 kPa 0.19 kPa Energysaver RHFE-308 FTR - 43 - ©Rinnai...
Page 48: Dismantling For Servic
13. Removal of the Thermal Fuse ........50 Unless otherwise stated, re-assembly is the reverse of dismantling Energysaver RHFE-308 FTR - 44 - ©Rinnai...
Page 49: Removal Of The Front Panel
Grip bottom left and right hand corners of front panel, pull forward to release. f. Unscrew seven (7) screws to remove control PCB from control panel. Energysaver RHFE-308 FTR - 45 - ©Rinnai...
Page 50: Removal Of The Convection Fan Motor
Remove four (4) screws securing the motor to the casing and remove fan motor cover. f. Disconnect flame sensing lead (pull hard). g. Remove spark sensing lead, and high tension lead (pull off gently). Energysaver RHFE-308 FTR - 46 - ©Rinnai...
Page 51: Removal Of The Burner
Remove front heat shield, see section 4 b) ~ d). c. Remove blanking panel, one (1) screw. d. Remove spark sensing lead, and high tension lead (pull off gently). e. Remove one (1) gas supply tube securing screw. Energysaver RHFE-308 FTR - 47 - ©Rinnai...
Page 52: Removal Of The Flame Rod
(1) earth connection on convection fan housing. a. Remove front panel assembly, see section b. Remove front heat shield, see section 4 b)~d). c. Remove two (2) screws (using a stubby phillips screwdriver). Energysaver RHFE-308 FTR - 48 - ©Rinnai...
Page 53: Removal Of The Combustion Fan
Remove front panel assembly, see section b. Remove one (1) earth lead from heat shield. c. Disconnect 5-pin power supply connector. d. Unclip sparker PCB from main PCB housing from securing lugs on side. Energysaver RHFE-308 FTR - 49 - ©Rinnai...
Page 54: Removal Of The Thermal Fuse
Reach in behind appliance and unclip thermistor from purse locks. d. Remove five (5) screws securing heat shield and lift heat shield off; see section 4- c)~d). e. Remove overheat thermistor; see section 4-e). Energysaver RHFE-308 FTR - 50 - ©Rinnai...
Page 60: Parts List
Back Spacer, R/H Assembly 90103417 3578 Back Spacer, L/H Assembly 90171026 3579 Heat Exchanger Complete Assembly 90120387 3580 OHS Bracket Flame Rod Bracket Flame Rod Packing 90173113 3069 Flame Rod 4299 Combustion Chamber Fixing Bracket Energysaver RHFE-308 FTR - 56 - ©Rinnai...
Page 61 Motor Fixing Screw Combustion Chamber Connection Tube Top 3996 Connection Tube Packing 3997 Combustion Chamber Connection Tube Bottom 3998 Rubber Connection Tube Clip 3103 Air Inlet C 90123043 4367 Air Inlet Packing 4053 Energysaver RHFE-308 FTR - 57 - ©Rinnai...
Page 62 Thermal Fuse Harness 90120544 4395 Main Harness Assembly 4387 Electrical Cord Assembly 4396 Power Cord Assembly 3115 Top Panel Complete Assembly 4397 Flame Rod Lead 4398 Combustion Motor Harness A 4399 Cord Packing Energysaver RHFE-308 FTR - 58 - ©Rinnai...
Page 64 Tel: (03) 9271 6625 Fax: (03) 9271 6622 NEW ZEALAND LTD. Internet: http://www.ralenti.co.nz/rinnai E-mail: fernerr@rinnai.co.nz Tel: (09) 625 4285 Fax: (09) 624 3018 Tel: 0800 746624 (0800 Rinnai) 24 hr Service 691 Mt. Albert Road, Royal Oak, Auckland P O Box 24-068...

Rinnai ENERGYSAVER RHFE-308FTR Service Manual

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25. Dismantling for Service

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