Page 1: Table Of Contents
37AHA SERIES HYDRONIC AIR HANDLER SIZES 045 THRU 090 Training Manual The Rinnai Tankless Heating System ....2 Installation Codes and Standards ......2 Model Number Nomenclature........ 3 Features............. 4, 5 Performance Specification Summary ....6 Inside the Hydronic Air Handler......6 Basic Sequence of Operation......
Page 2: The Rinnai Tankless Heating System
The Tankless Heating System combines the Rinnai tankless water heater and a new hydronic air handler to provide comfortable residential heat. Now the energy savings and endless hot water of a Rinnai tankless water heater can be applied to heating both residential air and water.
Page 3: Model Number Nomenclature
K = 115 - 1 - 60 08 = 800 (650-800) 090 = 90,000 L = 240 - 1 - 50 (export models) 12 = 1200 (650-1200) 14 = 1400 (1000-1600) 16 = 1600 (1200-1750) Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 4: Features
Features Domestic Hot Water Priority The Rinnai Hydronic Air Handler includes* a domestic hot water priority flow sensor that will determine when to shut down and re-direct all the water heater’s output to whichever fixture and or appliances that are calling for hot water. This feature will turn off the pump to prevent cold air from blowing into the structure and excessive wear on the internal pump components.
Page 5 Fine-Tuned to Work with Rinnai Tankless Water Heaters • The unique hydronic air handlers are designed to work in combination with Rinnai tankless water heaters to deliver a wide variety of heating capacities that cover a broad range of residential and light commercial heating spectrums. Because of the matched system, Rinnai Hydronic Air Handlers are not designed to be installed with any other tank, tankless or boiler product.
Page 6: Performance Specification Summary
External Static Pressure based on 0.5” W.C. without Evaporator Coil Inside the Rinnai Hydronic Air Handler Foil-Faced Insulated Cabinet Coil Assembly Hydronic Pump Blower Assembly (multi-speed motor) Control Box and Control Board Filter Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 7: Basic Sequence Of Operation
Typical Open-Loop Air Handler Operation • The thermostat calls for heat and engages air handler pump creating water flow • The Rinnai tankless water heater fires and begins heating • The air separator ensures the circulation loop is purged • Hot water passes through the hydronic heating coil •...
Page 8 Typical Open-Loop Air Handler Operation • The thermostat calls for heat and engages air handler pump creating water flow • The Rinnai tankless water heater fires and begins heating • The air separator ensures the circulation loop is purged • Hot water passes through the hydronic heating coil •...
Page 9 • Similarly, when the thermostat calls for heating from the heat pump, circulation occurs from the evaporator-coil through the condenser • Air is blown across the evaporator-coil moving warm air into structure (no time delay) Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 10 • While the hydronic system is in use, the flow sensor again monitors water usage to ensure adequate heat is delivered Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 11: Specifications
Entry (Typ. for both sides) 34" 17 13/16" Water Out 2 1/8" 17 13/16" Water In 18 5/16" 1" 7/8” Dia. KO 6" Supply Power Wire Entry (Typ. for both sides) 22" 1 3/8" Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 12: Installation Configurations
As packaged, the hydronic air handler is pre-configured for bottom return air inlet application. Minimum Clearance to Combustibles TOP/PLENUM zero BACK zero SIDE zero FRONT SIDE zero zero SERVICING 24” (610 mm) BOTTOM zero Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 13 AHA045: P/N 603000011 SHARED UNIT SCREW AHA060: P/N 603000012 USE TO LOCATE FILTER ASSEMBLY AHA075: P/N 603000013 AHA090: P/N 603000014 CAUTION: Remove the control box and or relocate any wiring before cutting the cabinet. Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 14: Multi-Position Orientation
Air return opening can be supplied through the closet door, side (thru a wall) or a combination of both. Refer to ACCA, Manual D, or SMACNA for specific guidelines. Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 15 HORIZONTAL - LEFT HORIZONTAL - RIGHT Horizontal configuration may require the installation of a Bottom Fill Plate that must be purchased as an accessory. NOTE: Horizontal installations require specialized cased coils Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 16: Suspended Cabinet Installation
If an auxiliary drain pan is required under the hydronic air handler, vibration isolators or • Styrofoam blocks should be used between the pan and the air handler unit. Please refer to installation manual for complete guidelines. • Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 17: Duct Connections / Air Distribution Ductwork
Alternatively, fibrous duct-board may be used if constructed and installed in accordance with the latest SMACNA construction standards for fibrous glass ducts and compliance with the NFPA, while meeting UL Standard 181 for Class 1 air ducts. Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 18: Plumbing
(2) ¾” Side port tee……….…..2(3) = 6.0 ft. 5 ft 12 ft (1) ¾” Taco air separator….1(0.3) = 0.3 ft. (1) ¾” Rinnai flow sensor..1(3.2) = 3.2 ft. 10 ft (2) ¾” Ball valves….….…..2(2.2) = 4.4 ft. ball valves Total Equivalent length……..…….…93.9 ft.
Page 19: Accessories
18 gauge 16 gauge 14 gauge 12 gauge Rinnai offers two 7-Day programmable thermostats for heat pump or air conditioning applications Thermostat Installation: • The thermostat should be installed 5 ft. (1.5 m) from the floor in a frequently used room, or on an inside partitioning wall that is away from pipes or duct work •...
Page 20 Flow Sensor Custom Manufactured for Rinnai Hydronic Air Handlers Rinnai’s customized flow sensor is required for open loop/domestic hot water priority systems (DHWP). If water moving through the air handler pump is 1 gpm or less in excess of 1 minute due to domestic hot water needs, the flow sensor alerts the PCB to stop the air handler pump and blower.
Page 21 • Necessary for any open loop system • Necessary also for DHWP • Adjustable temperature setting • Protects against scalding due to air handler’s higher temperature demand Rinnai Part Number Mixing Valve : P/N 603000016 Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 22 Side Filter Rack: P/N 603000015 AHA090: (2 ea) 12 X 20 X 1 Bottom Fill Plate Bottom Fill Plate Part Numbers AHA045: P/N 603000011 AHA060: P/N 603000012 AHA075: P/N 603000013 AHA090: P/N 603000014 Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 23 “HUM” quick connects (dry contacts – 24 / 115 VAC). The humidifier output is on whenever a heating demand is being satisfied. Please refer to humidifier manufacturer’s guidelines for installation and optimal placement in system. Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 24 PCB will accept the electronic air cleaner’s power connections via the “EAC” and “N4” quick connects. The output is energized whenever the hydronic air handler blower is on. Please refer to air cleaner manufacturer’s guidelines for installation and optimal placement in system. Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 25 UV lamp’s power connections via the “UV” and “N4” quick connects. The output is energized whenever the hydronic air handler blower is on. Please refer to air cleaner manufacturer’s guidelines for installation and optimal placement in system. Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 26: Electrical Connections
Single Phase Control Box 115 Volt Fuse Disconnect (Field Supplied) Condensing Unit Disconnect 24 Volt Terminal Block (Field Supplied) (Field Supplied) Flow Sensor 24 Volt FS / WH Connector (Packaged with Unit) Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 27: Dip Switch Options
Dip Switch Options Rinnai Smart Operating System The Rinnai Smart Operating System is a feature control system that is designed to allow the installer to configure the unit for single, two-stage, A/C or heat pump systems with selectable heat blower-off delay to suit the application.
Page 28: Purging And Priming The System
The 4900 Series does not have to be installed at the highest point of the plumbing system as with other air separators. Rinnai 37AHA series air handlers can be piped without the need for a “purge cart” to fill the system and remove the entrapped air bubbles. See the installation guide for details.
Page 29: Maintenance
Use pressurized air to remove dust from the components • Use soft dry cloth to wipe cabinet Pump Assembly Maintenance The pump is equipped with a fully replaceable cartridge and seal assembly Cartridge and Seal Assembly Pt # 607000016 Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 30: Troubleshooting
Status Shunt Jumper Refer to the installation manual for the following troubleshooting flow charts: – Start-Up and ‘LED’ Troubleshooting – Blower System 115V Troubleshooting – Circulating Pump 115V Troubleshooting – 24V Troubleshooting Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 31: Warranty
• The hydronic air handler should be installed by a state qualified or licensed contractor(s) • Improper installation may void the warranty • Warranty will only be covered when the hydronic air handler is connected to a Rinnai tankless water heater •...
Page 32: Sample Installation
Sample Installation Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 33: Rinnai Tankless Water Heater Sizing
Rinnai Tankless Water Heater Sizing *Btu heat loss and heat gain calculations are comprehensive evaluations on a structure’s ability to retain heat. Please visit www.acca.org/tech/manualj for more information. Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 34 Rinnai’s Applications department or use Rinnai’s comprehensive sizing calculator available at www.rinnaisolutions.com. Install only one Rinnai Tankless Water Heater per Air Handler and one Air Handler per Tankless Water Heater (contact Rinnai if needed) The R94 will provide additional output in areas with ground water greater than 75° F...
Page 35: Sizing Example
The following example is for demonstration only. Please refer to the Hydronic Air Handler Installation Manual for comprehensive sizing information. Contact Rinnai’s Sizing and Application Department if needed. 1. Rinnai Tankless Water Heater selected based upon potable hot water needs (average groundwater=50°F, 2 Bath/1 Kitchen) = R94LSi 2.
Page 36: Parts List
Control Panel Front Cover High Voltage Compartment Lower Front Fill Lower Front Service Door Lower Front Fill Panel Upper Front Fill Panel Upper Front Service Door Top Fill Water Coil Coil Attachment Bracket Coil Support Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 37 Blower Capacitor SEXP-492 Blower Assembly Components Blower Housing Left Blower Angle Diffuser Right Blower Angle 1/3 HP Motor 1/2 HP Motor 3/4 HP Motor 1 HP Motor Motor Mount Kit Blower Wheel Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 38: Product Knowledge Test
Product Knowledge Test 1. The Rinnai Hydronic Air Handler can be installed with other tank and tankless water heaters? a. True b. False 2. When determining which Rinnai Air Handler fits that need for a specific application, the following must be considered.
Page 39 Notes Rinnai Corporation Hydronic Air Handler 101 Training Manual...
Page 40 • Full-function Remote • Unique Interchangeable Fronts • Digital Dual Timer Function To register your hydronic air handler or tankless water heater, please visit www.rinnairegistration.com. For those without internet access, please call 1-866-RINNAI1 (745-6241). 600000015 12/2007 © 2006 Rinnai America Corporation...

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