The Rinnai Infinity 16i water heater, when correctly installed, complies with the requirements of the United Kingdom Water Regulations / Byelaws (Scotland). These Products can be found listed in the Water Fittings and Materials Directory. The Rinnai Infinity 16i water heater is CE Marked as allowed by Technigas.
UK INSTRUCTIONS This appliance may only be serviced or repaired by someone certified competent to do so. At the time of printing the only people deemed competent to install this appliance are those that are CORGI registered for this type of appliance in this type of location who have a current ACS certificate. 1. Gas safety (Installation & Use) regulations 1998 are the ‘Rules in force’.
Contents Contents………………………………………………………………..…………………4 Glossary of Terms and Symbols.............................................................................5 Introduction.............................................................................................................6 Specification of 16i..................................................................................................7 Sensors and Safety Devices..................................................................................
Glossary of Terms and Symbols 5
Introduction The Rinnai Infinity hot water units represents the latest technology in continuous flow, temperature controlled hot water. Features • The Rinnai Infinity 16i will NEVER RUN OUT of hot water. As long as electricity, water, and gas supplies are connected, hot water is available when hot water taps are open. • Built into the main micro-processor is the facility to LIMIT THE MAXIMUM TEM- PERATURE of the hot water supplied. The water temperature may be set to various temperatures.
Specification of 16i Type of Appliance Operation Flue System Installation Available Temps Dimensions Width Height Depth Weight Connections Gas Cold Water Hot Water Ignition System Noise Level Nox Water Temp Control Safety Devices Remote Controls Flame Failure Boil Dry Remaining Flame Over current Over pressure Combustion Fan Fusible Link Over temperature Heater Mounted Kitchen Bathroom Remote Cable G20 Nat Gas Press Low G20 Nat Gas Press High G25 Nat Gas Press Low G25 Nat Gas Press High G30 LPG (But
Sensors and Safety Devices • Heat Exchanger Thermistor: Measures hot water temperature at heat exchanger outlet. If water temperature reaches a predetermined limit, gas supply is stopped. • Hot Water Delivery Thermistor: Measures hot water temperature at the outlet valve (i.e. the ‘mixed’ temperature). • Flame Rod: Monitors combustion characteristics inside the combustion chamber. If the flame fails, gas supply is stopped.
Dimensions 9
Schematic Diagram HOT WATER SUPPLY OPERATION Ignition Press ON/OFF Button of Optional Remote Control to turn on unit . The remote control display and priority LED will light up. When a hot water tap is opened the Water Flow Sensor revolves and sends a pulse signal to the Printed Circuit Board (PCB.) When the PCB detects a water flow over 2.4 L/min it compares the temperature at the Hot Water Thermistor to the set point and begins the ignition process; the Combustion Fan starts first.
Structure Diagram 11
Main Components 1. Gas Control Unit 1.1 Modulating Valve This device is used by the PCB to adjust the volume of gas to the burner in proportion to the volumetric flow rate of water in order to maintain a supply of constant temperature hot water amid changes in water flow rates and incoming temperatures. 1.2 Change-over Solenoid Valves Additional solenoid valves are included to section the burner and stage the control in 3 steps.
Main Components 3. Thermal Fuse The thermal fuse is an electric link which must be intact for the unit to operate. If the thermal fuse reaches a set temperature it will melt and the unit will shut down. The thermal fuse must be replaced if it melts. It is to protect against over heating and heat exchanger splits where water may leak out and be superheated into steam. 4. Overheat Safety (Bi-metal Switch) This Bi-metal Switch is fixed at the bend of the Heat Exchanger hot water outlet.
Water Flow The figures on the following page show the available water flow rates for different outlet temperatures based on a range of inlet temperatures. Regardless of the output capacity the maximum flow rate is limited to 20 litres/minute. Water Flows can also be calculated by the following formula: M = 60 x ( Q / C x T ) Where M = Water flow rate in litres/minute. If M is greater than 20, the water must be mixed down at the point of use as the maximum flow rate of the unit is limited to 20.
Water Flow Hot Water Outlet Temp C Incoming Water Temp 5C 80 70 60 50 40 30 20 10 0 0 I 2.4 L/min min Flow 5 10 15 Hot Water Flowrate L/min Hot Water Outlet Temp C Incoming Water Temp 10C 80 70 60 50 40 30 20 10 0 0 I 2.4 L/min min Flow 5 10 15 20 Hot Water Flowrate L/min Hot Water Outlet Temp C Incoming Water Temp 20C 80 70 60 50 40 30 20 10 0 0 I 2.
Water Pressure vs. Flow The water pressure vs. flow characteristics are as follows: WATER VOLUME（L/min） 25 20 15 10 5 0 0 1 2 3 4 5 6 7 8 WATER PRESSURE（bar） Regardless of how high the incoming water pressure is it is not possible to obtain more than 20 L/min from the Rinnai Infinity 16i. In order to have this much flow the temperature rise must be low enough that the unit has the capacity to satisfy the temperature setpoint for this flow rate.
Gas Conversion Procedure 17
Gas Conversion Procedure 18
Testing 1. Purge gas, hot water and cold water supply lines before making the final connection of the water heater. Swarf in either the gas or water supplies may cause damage. 2. Turn on gas and cold water supplies. 3. Test for water leaks and gas escapes near the unit. 4. Isolate gas and electric supply. Remove test point screw located on the inlet gas pipework below the heater and attach pressure gauge. 5. Turn the power on at the switch and turn on gas.
Gas Pressure Setting The working gas pressure on the water heater is electronically controlled and factory set. Under normal circumstances it does not require adjustment during installation. Perform this procedure only if the unit is not operating correctly and all other possible causes for incorrect operation have been eliminated. Contact Rinnai before attempting to alter the gas pressure. Failure to do so could void the warranty. 1. Turn 'OFF' the gas supply. 2. Turn 'OFF' 230V power supply. 3.
Gas Pressure Setting 11.Check the burner test point operating pressure. 12. Remove rubber access plug and adjust the regulator screw on the modulating valve (Fig. 4) as required to the pressure below. Replace rubber access plug. N.G LPG G20 G25 1.8 mbar 1.8 mbar G30 G31 2.2 mbar 2.2 mbar Fig. 4 Adjustment Point off on 13. Set the Rinnai Infinity to 'Forced High' combustion by setting no. 7 and no. 8 dipswitches to 'ON'. (Fig.5) Ensure maximum water flow. 14. Check the burner test point pressure.
Dip Switch Setting Dip Switch Positions Explained OFF ON SW 1 2 3 4 5 6 7 8 - Gas Type Gas Type Computer Programming Computer Programming Computer Programming Max. Temperature Combustion Combustion LEGEND: Black Section indicates position of dip switch.
Troubleshooting the Infinity 16i Rinnai water heaters have the ability to check their own operation continuously. If a fault occurs, an error code will flash on the Digital Display if you have temperature controllers installed. This assists with diagnosing the fault. * In all cases, you may be able to clear the Error code by turning the hot water tap OFF, then ON again. If this does not clear the error, try pushing the On/Off button OFF then ON again.
Remotes Remote temperature controllers are a feature that provides control over the water temperature. The Rinnai Infinity 16i water heater can be operated with 1, 2, or 3 temperature controllers. The controller MC-45-SR-EU comes as standard with this water heater installed into the front panel. Digital Monitor Priority Indicator Priority Button Indicates the temperature selected. Error message flashes in the event of a fault.
Operational Flow Chart 25
Time Charts 26
Error Codes Error Fault 10 11 12 14 16 32 34 61 71 72 - Action Step Check flue terminal for blockages Combustion fan overcurrent. Unit Check Flue operates, then stops. Check combustion fan. Check Gas Supply is correct Check Gas Isolating Valves are open Check Electrode Check Flame Rod Missed or No Ignition.
Error Codes Error Fault - - - - - - - Action Step Make sure that if there is a controller, it is on Ensure there is enough water flow Check Filter Check for Air lock Check power cord is plugged in (if applicable) Appliance does not operate at all.
Diagnostic Checks A. Combustion Fan Circuit. The voltages should be checked while the unit has the electric power On. The meter leads can be inserted into the connection plug at the pcb (Plub B from wiring diagram.) To test the resistances electrically isolate the water heater, unplug the connector either at fan motor (B1) or at pcb (B), and measure the resistances through the motor.
Diagnostic Checks If it is correct unplug the HT lead and hold it about 3 – 5 mm from a clean, earthed, screw head. WARNING: ISOLATE THE GAS SUPPLY. KEEP HANDS WELL AWAY FROM THE END OF THE LEAD – VERY HIGH VOLTAGES. Power the heater and turn the water on. A spark should jump from the lead to the earthed screw. If this does not happen replace the sparker box – after you have confirmed voltage between the grey wires onto the sparker box.
Diagnostic Checks D. Solenoid Valves. There are 3 solenoid valves and one modulating valve. Two of the solenoids are burner sectional solenoids, and the third is the main, safety solenoid. The easiest way to check the gas valve is by putting the manometer on the test point on the gas valve and cycling the unit. If the solenoids are working correctly the burner pressure when it lights should be around 8mbar.
Diagnostic Checks E. Thermal Fuse (Overheat) Circuit. First locate the Overheat circuit. It is made up of red wires making a loop through the unit, including a number of thermal fuses, and the overheat bi-metal switch. Along the right-hand side of the unit the red wires can be seen running down the side of the unit from the bi metal switch. One of these red wires has a connector approximately in front of the transformer (Connector A5 from wiring diagram.
Diagnostic Checks G. Water Flow Servo Circuit. If the heater makes a loud ticking unplug the flow servo (motor behind the internal brass cold water inlet connection) and run the unit to see if it stops. If so the motor is faulty. Water Flow Servo Circuit. From the water flow servo circuit there are 6 wires. They connect to the pcb at connector A (from the wiring diagram.) Remove the plastic terminal cover so that you can insert the multimeter leads.
Diagnostic Checks J. Water Flow Sensor. The water flow sensor is located inside the water heater immediately as the cold water enters the unit. From that there are 3 wires (red, yellow, black) running to the pcb, there is a connector plug in between the sensor and the pcb for testing. Measure the voltage with the water heater power on and no flow. Following this measure the voltage between Yellow and Black with water flow on.
Diagnostic Checks Hot Water Outgoing Thermistor This thermistor is located at the bottom left of the water heater where the water exits the water heater. Combustion Air Thermistor This thermistor is located next to the controller connection point on the right hand side of the unit above the pcb. It is at the end of the two yellow leads. L.
Diagnostic Checks O. 3 Amp Fuses The unit has two 3 Amp fuses on the pcb and one in the moulded plug lead. Remove the fuses and check for continuity through. If there is continuity the fuse is good, if not replace it. P. Transformer. There is one transformer on the 16i located in the back above the cold water connection with the flow sensor and servo. To access it remove the top and bottom screw holding in the pcb and pull the pcb out.
Diagnostic Checks R. Water flow. To operate there must be at least 2.4 l/min flowing through a Rinnai water heater. If there is multiple heaters, installed without PAM valves or a MECS system then there must be 2.4 l/min per heater. A modern wash hand basin could be as low as 3 or 4 l/ min, so if there is no means of staging the heaters they may not operate. Isolate all the units except one to find out. This problem could also crop up with a pumped secondary.
Diagnostic Diagnostic Checks Checks The rest of the circuit, including the valve heaters should be about 270 Ohms. Measure it by unconnecting the connector to the top heater and the connector to the hot water outlet valve heater and measure resistance through the sides of the connectors that lead to the valve heaters. Through one side there will be no resistance, through the other side there will be about 270 Ohms.
Diagnostic Checks Fault Finding Chart 39
Fault Finding Chart 40
Fault Finding Chart 41
Fault Finding Chart 42
Fault Finding Chart 43
Fault Finding Chart 44
Fault Finding Chart 45
Wiring Diagram 46
Diagnostic Points Flow Chart No.
Servicing Procedure Servicing Infinity Water Heaters Isolate electrics and valve off hot, cold, and gas to unit. Check the water filter and strainer to be sure there are no blockages. Remove the combustion fan and clean the impeller. Check the burner for wear or water damage. Vacuum out any debris. Wipe out chamber. Check the heat exchanger for soot or hot spots that could be caused by poor combustion. Clean carbon build up from ionisation and ignition probes.
Dismantling for Service 49
Dismantling for Service 50
Dismantling for Service 51
Dismantling for Service 52
Dismantling for Service 53
Dismantling for Service 54
Dismantling for Service 55
Exploded Diagram 56
Exploded Diagram 57
Exploded Diagram 58
Exploded Diagram 59
Exploded Diagram 60
Parts List 61
Parts List 62
Parts List 63
Parts List 64
Letter of Compliance 65
CE Certificate 66
