Use of non-Rinnai parts will result in the void of warranty. 8 9 Condensate tray figure 31 11 12 13 14 !DANGER Installation Visual inspection of the flame Inspection glass figure 33 The burner must flame evenly over the entire surface when operating correctly. The flame must burn with a clear, blue, stable flame. Check the flame through the inspection glass in the ignition probe (fig. 33). The flame pattern should be as shown in the figures below. SATISFACTORY Ignition probe blue flame UNSATISFA

The program takes 17 minutes and stops automatically. After this the unit will function normally. (See also 'Filling and de-aerate the boiler and installation, chapter 9). On a call for heating or hot water the control system will select the required water control temperature. This water temperature is called the T-set value. On a call for central heating the boiler ignites first at low input. The input is then changed slowly to match the load required. The boiler operates in this way to avoid e

Refer to this manual. For assistance or additional information consult a qualified installer or the gas supplier. CAUTION! The user manual is part of the documentation that is delivered to the installation's operator. Go through the information in this manual with the owner/operator and make sure that he or she is familair with all necessary operating instructions. NOTICE! Installation and service must be performed by a qualified installer, service technician or the gas supplier. In the Commonwe

First check the identification plate on the boiler for the suitable gas type. Do not use the boiler for another type of gas than indicated on the identification plate of the boiler. This will cause improper functioning and can damage the boiler. Natural gas: resume with chapter 6.4.1 Propane gas: resume with chapter 6.4.2 Installation ii 6.4.1. Gas connection with natural gas Sediment trap figure 7 i! ii The gas supply connection must comply with local regulations or, if such NOTICE regulations

fits walls Vent Kit A FOT-203 4 1/3 - 9 1/2 inch (110 - 240 mm) Vent Kit B FOT-204 9 1/2 - 15 3/4 inch (240 - 400 mm) Wall penetration hole: 3 1/2 in (90 mm) Flue extensions are not authorized to be used with the FOT-203 and FOT-204 manifolds. FOT-203 / FOT-204 Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-364-8643 • RHFE-750ETRA VENTING WITH EXTENSIONS Maximum Length = 33 feet (10 m) and 3 elbows Certified and Listed Vent Products

9.8 inch (249 mm) W.C. 10.5 inch (267 mm) W.C. 13 inch (330 mm) W.C. AC 120V, 60 Hz Flex line: 3/8 inch flare nut; ball valve: 1/2 inch female x 3/8 inch flare Flame burners Electronic spark ignition Forced combustion, forced convection Low (L): minimum combustion; High (H): maximum combustion; 60° - 80° F in 2° increments (16° - 26° C in 1° increments) Electronic thermistor Bottom front louvers All parts: 2 years from date of purchase DIMENSIONS - inches (mm) WEIGHT: 154.3 lbs (70 kg) 35 7/16 (

10.5 inch (267 mm) W.C. 13 inch (330 mm) W.C. AC 120V, 60 Hz Flex line: 3/8 inch flare nut; ball valve: 1/2 inch female x 3/8 inch flare Flame burners Electronic spark ignition Forced combustion, forced convection Low (L): minimum combustion; High (H): maximum combustion; 60° - 80° F in 2° increments (16° - 26° C in 1° increments) Electronic thermistor Bottom front louvers All parts: 2 years from date of purchase DIMENSIONS - inches (mm) WEIGHT: 154.3 lbs (70 kg) 35 7/16 (900) 2 15/ 16 (71) 27 9

13 in (330 mm) W.C. High: 162.7 Rinnai EX22C (RHFE-559FTA) Safety Devices Venting Maximum Vent Length Wall Thickness and Flue Manifold Kits (the “A” vent kit is included with the appliance) Warranty Conversion Kit • Flame rod detects flame failure; results in auto shutdown to prevent escape of gas • Bi-metal switch, thermal fuse, and thermistor detect overheat condition; results in auto shutdown • 3 amp fuse protects against power surge; results in auto shutdown • Abnormal spark at t

Rinnai Type of Appliance Rinnai Model Number Gas Rate Input (BTU/hour) Gas Rate Output (BTU/hour) AFUE Rating Minimum Gas Supply Pressure Maximum Gas Supply Pressure Electrical Connection Gas Connection Combustion System Ignition System Fan CFM Output Temperature Settings Temperature Control Humidifier Tray Weight Clearance from Combustibles Noise Level Warm Air Outlet FEATURES Restart capability: Timer Settings: Seven-stage modulating gas valve: Negative coefficient thermistor: V