Related Manuals for Rinnai INFINITY HD49
Summary of Contents for Rinnai INFINITY HD49
- Page 1 HD49kWe external HD49kWi / A28i REU-VCM2837WC-ZK REU-VCM2837FFC-ZK REU-VCM2837FF-ZK INFINITY HD49 / A28i continuous flow water heaters Service manual...
- Page 2 Improper installation, adjustment, alteration, service and maintenance can cause property damage, personal injury or loss of life. Help is here For more information about buying, using, and servicing of Rinnai appliances call: 0800 RINNAI (0800 746 624). Rinnai New Zealand Limited...
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Page 3: Table Of Contents
Contents Rinnai INFINITY HD49 / A28i specification ..4 Connections............5 HD49kWe external dimensions (mm) ....6 HD49kWi / A28i internal dimensions (mm) ...7 HD49kWe external cutaway diagram ....8 HD49kWi / A28i internal cutaway diagram ...9 Operation principles..........10 Main components ..........11 Sensors and safety functions .......12 PCB interface and dip switch settings ....13... -
Page 4: Rinnai Infinity Hd49 / A28I Specification
The INFINITY HD49 units are factory preset to 75 °C, but can be set to deliver higher temperatures, up to 85 °C, making them ideal for commercial applications. The INFINITY A28i is factory preset to 55 °C and is suitable for residential applications only. -
Page 5: Connections
Gas connection Manifolding Compatible with the HD EZ connect cable for joining two water heaters together, and the HD MECS (manifold electronic control system) for connecting up to 25 water heaters. INFINITY HD49 & A28i service manual 01-21 | 5... -
Page 6: Hd49Kwe External Dimensions (Mm)
HD49kWe external dimensions (mm) 29.5 4× 13×10.1 A dimension 4× 5.5×10.5 long hole long hole 36.4 Cold 46.1 36.3 Cable access 26.2 6 | INFINITY HD49 & A28i service manual 01-21... -
Page 7: Hd49Kwi / A28I Internal Dimensions (Mm)
HD49kWi and A28i internal dimensions (mm) 10～43 (variable) 95.3 Drain pipe 5/8 70.1 A dimension 36.4 4× 5.5×10.5 4× 13×5.7 long hole Cold 46.1 long hole 36.3 Cable access 26.2 INFINITY HD49 & A28i service manual 01-21 | 7... -
Page 8: Hd49Kwe External Cutaway Diagram
Gas control assembly Bypass flow control device Water flow sensor Gas connection Water filter assembly Water inlet Pressure relief valve Hot water outlet Cable connection Water connecting pipe Hot water connecting pipe 8 | INFINITY HD49 & A28i service manual 01-21... -
Page 9: Hd49Kwi / A28I Internal Cutaway Diagram
Gas control assembly Bypass flow control device Water flow sensor Gas connection Water filter assembly Water inlet Pressure relief valve Hot water outlet Cable connection Water connecting pipe Hot water connecting pipe INFINITY HD49 & A28i service manual 01-21 | 9... -
Page 10: Operation Principles
When the hot water tap is closed the PCB no longer receives a pulse signal from the water flow sensor. The PCB shuts down the main solenoid valve and change-over solenoid valves, and the burner stops. 10 | INFINITY HD49 & A28i service manual 01-21... -
Page 11: Main Components
97 °C the bi-metal switches will open and the valves are a combined assembly on the cold solenoid valve circuit is broken. This will stop water inlet of the appliance. combustion. INFINITY HD49 & A28i service manual 01-21 | 11... -
Page 12: Sensors And Safety Functions
In the case of a combustion fan fault (no rotation of fan blades) sensor the gas supply is stopped. Temperature cutout If the delivered hot water temperature rises above the required delivery temperature for a number of seconds the gas supply is stopped. 12 | INFINITY HD49 & A28i service manual 01-21... -
Page 13: Pcb Interface And Dip Switch Settings
Rinnai will accept no liability for issues arising out of use of the use of this information. If you have any doubts about the performance of the water heater, please contact Rinnai 0800 RINNAI (0800 746 624). -
Page 14: Gas Pressure Setting
13. Remove pressure gauge and replace sealing screw. Turn on the gas, and power supply. 14. Operate the unit and check for gas leaks. 15. Replace the front cover of the appliance. 14 | INFINITY HD49 & A28i service manual 01-21... -
Page 15: Factory Preset Default Dip Switch Settings
SW2 of DipSW1 = Off (fixed temp.) SW2 of DipSW1= On (with controllers) No controllers With controllers No controllers With controllers SW3 SW4 SW5 (fixed temp.) (Max. set temp.) (fixed temp.) (Max. set temp.) INFINITY HD49 & A28i service manual 01-21 | 15... -
Page 16: Water Flow Rates And Pressure Characteristics
5.04 0.01 6.20 8.61 0.02 8.06 12.48 0.04 12.82 18.86 0.07 16.83 23.67 0.10 20.87 28.70 0.15 24.80 32.96 0.20 25.77 35.83 0.22 25.88 37.16 0.30 25.88 37.28 0.40 25.88 37.25 16 | INFINITY HD49 & A28i service manual 01-21... -
Page 17: Operational Flow Rate
Modulating solenoid valve OFF Combustion indicator OFF Internal only 34 flashing Combustion air thermistor faulty Combustion fan OFF Only applicable when remote outgoing temp. controller is connected. less than 60 °C INFINITY HD49 & A28i service manual 01-21 | 17... -
Page 18: Wiring Diagram
Wiring diagram 18 | INFINITY HD49 & A28i service manual 01-21... -
Page 19: Diagnostics Points
Bypass flow control device DC11-13V / 44-55 Ω W-BL Water flow control device DC11-13V / 44-55 Ω W-BL R-BK DC6-45 V Combustion fan Y-BK DC11-13 V W-BK DC5-10C (pulse 20-440 Hz) INFINITY HD49 & A28i service manual 01-21 | 19... -
Page 20: Diagnostics Codes
Confirm fan motor is functioning correctly. heater is too hot) Check for foreign materials in combustion chamber and/or exhaust piping. Check for blockage in the heat exchanger. Electrical grounding Check all components for an electrical short. 20 | INFINITY HD49 & A28i service manual 01-21... - Page 21 Measure resistance of the water flow control sensor. If the display is blank and clicking is coming from the unit, disconnect the water flow servo motor. If the display comes on then replace the water flow servo motor. INFINITY HD49 & A28i service manual 01-21 | 21...
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Page 22: Maintenance Monitor And Error History
To lock the controller on a set temperature press and hold the ‘Priority’ button controller lock for two seconds, simultaneously press and hold the for five seconds, a beep will sound and the display will alternate between LOC and the set temp. 22 | INFINITY HD49 & A28i service manual 01-21... -
Page 23: Maintenance Parameters
Number of master controllers, will be 0 or 1 111 means: • Two bathroom controllers (1 +1) • One master controller Number of bathroom controllers, will be 0, 1, or 2 INFINITY HD49 & A28i service manual 01-21 | 23... -
Page 24: Heat Exchanger Vinegar Flush
12. Remove the in-line filter at the cold water inlet and clean out any residue. Place the filter back into the unit. 13. Restore the electrical power to the water heater. 24 | INFINITY HD49 & A28i service manual 01-21... -
Page 25: Dismantling For Service
• Removing the gas housing and checking the gas filter • Cleaning the flame rods and igniter (remove the flame rods and check for carbon buildup and clean with sand paper) INFINITY HD49 & A28i service manual 01-21 | 25... - Page 26 Take off the controller bracket and controller Undo the one screw holding the bracket in place and remove. Remove the burner plate and manifold 26 | INFINITY HD49 & A28i service manual 01-21...
- Page 27 Remove the burner Carefully remove the burner and clean by blowing through. Remove the combustion fan Remove the four fan screws, take off white connector (red, black, white, yellow), remove fan and clean. INFINITY HD49 & A28i service manual 01-21 | 27...
- Page 28 Rinnai recommends the water flow turbine is checked and cleaned as part of the maintenance schedule for the unit.
- Page 29 Remove the gas connection Remove the gas connection and check the gas filter, clean if needed. INFINITY HD49 & A28i service manual 01-21 | 29...
- Page 30 Notes...
- Page 31 Notes...
- Page 32 Rinnai.co.nz Tel: 0800 746 624 http://www.youtube.com/rinnainz http://facebook.com.rinnainz...
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