Table of Contents
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Installation, Operation, and Maintenance Manual
Quality Assurance
UL recognized
component
This product is manufactured in a
facility registered by UL to ISO 9001.
File No. A6887.
HYDRONIC AIR HANDLER
SIZES 045 THRU 090
Consumer Safety Information................................ 2
Model Number Nomenclature ............................... 3
Physical Data......................................................... 4
Receiving & Checking Equipment ......................... 5
Installation
Clearances .................................................... 5
Locating and Mounting ............................... 6-9
Plumbing................................................. 10-13
Electrical Connections............................ 14-16
Dip Switch Options ...................................... 17
Thermostat Installation ........................... 17-18
Start-Up Procedure ..................................... 19
Troubleshooting...................................... 20-23
Sequence of Operation .................................. 24-26
Maintenance .................................................. 26, 27
Selection Guide ............................................. 27, 28
Specifications ...................................................... 29
Air Delivery Performance .................................... 30
Accessories ......................................................... 31
Hydronic Air Handler Output .......................... 32-34
Wiring Diagrams ............................................. 35-37
Parts List......................................................... 38-39
Limited Warranty ............................................ 40-41
37AHA SERIES
2100-500
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Summary of Contents for Rinnai 37AHA04508KA5
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Page 1: Table Of Contents
37AHA SERIES HYDRONIC AIR HANDLER SIZES 045 THRU 090 Installation, Operation, and Maintenance Manual Consumer Safety Information........ 2 Overview of the Rinnai Hydronic Air Handler..3 Model Number Nomenclature ....... 3 Physical Data............4 Receiving & Checking Equipment ......5 Installation Clearances ............ -
Page 2: Consumer Safety Information
The qualified installer or agent must use factory authorized kits and/or accessories when installing this product. Refer to the appropriate Rinnai® literature for listing. Read the entire instruction manual before starting the installation. Rinnai Corporation Hydronic Air Handler Manual... -
Page 3: Overview Of The Rinnai Hydronic Air Handler
HVAC Systems and Equipment Handbook Chapters 9 These unique Hydronic Air Handlers are designed to and 16 work in combination with our line of Rinnai® tankless products to deliver a wide variety of heating capacities US and CANADA: Air Conditioning Contractors... -
Page 4: Physical Data
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 Supply 6" Power Wire Entry (Typ. for both sides) 22" 1 3/8" Figure 1 Rinnai Corporation Hydronic Air Handler Manual... -
Page 5: Receiving & Checking Equipment
Check this information against requesting inspection by the carrier’s agent. All claim shipping papers and job requirements. papers MUST be forwarded to Rinnai® America Corporation for processing. In general, upon receipt of INSPECT SHIPMENT product, be sure to check all items against shipping list;... -
Page 6: Locating And Mounting
PLATE (BOTTOM FILL PLATE) AHA045: P/N 603000011 SHARED UNIT SCREW AHA060: P/N 603000012 USE TO LOCATE FILTER ASSEMBLY AHA075: P/N 603000013 AHA090: P/N 603000014 Figure 3: Modification of Unit to Accommodate Side Filter Rack Installation Rinnai Corporation Hydronic Air Handler Manual... - Page 7 Refer to the Rinnai Accessory list for installation. If side return air inlet installation is desired details. For side filter rack installation instructions refer to Figures 3 and 4.
- Page 8 8” MIN FOR DOOR REMOVAL USE 1” SQUARE, 1-1/4 x 1-1/4 x 1/4 (2) HEX NUTS, (2) WASHERS & (2) ANGLE IRON OR EQUIVALENT LOCK WASHERS REQ. PER ROD Figure 6: Horizontal Unit Suspension Rinnai Corporation Hydronic Air Handler Manual...
- Page 9 Internal filter rack and a 1 inch disposable filter are Multiple Air Handlers configured for installation with a standard on all models. Refer to the Specifications single Rinnai Tankless Water Heater is prohibited. section for dimensions. Rinnai Corporation Hydronic Air Handler Manual...
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Page 10: Plumbing
NOTE: Recommended piping, fittings, valves and other appurtenances (exclusive of those indicted as Copper Tubing Support: accessories that are available through Rinnai Copper tubing must be properly supported to prevent distribution) called for in piping schematics to be field- sagging or buckling. On horizontal runs with hard supplied. - Page 11 To prevent this from occurring, all closed loop hydronic systems MUST be equipped with an expansion tank. Refer to expansion tank manufacture’s instructions for proper sizing and installation. Rinnai Corporation Hydronic Air Handler Manual...
- Page 12 First determine the total straight pipe lengths; next refer to table 2 to determine the equivalent straight (1) ¾” Rinnai flow sensor..1(3.2) = 3.2 ft. pipe length for each fitting shown. Add together the (2) ¾” Ball valves….….…..2(2.2) = 4.4 ft.
- Page 13 STEP 5: OPEN cold water supply main valve (ball called an open loop system. Current Rinnai tankless valve 1 - BV ). The system will begin the prime/purge products are not certified for closed loop applications.
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Page 14: Electrical Connections
7. Route Control Box wiring within unit away from hot factory location of Control Box is suitable, proceed to surfaces, sharp edges and rotating parts. next section. To relocate the Control Box to an alternate location (blower compartment upper right Rinnai Corporation Hydronic Air Handler Manual... - Page 15 WARNING Failure to follow this warning could result in a fire. Do not use aluminum wire between the Hydronic Air Handler and the disconnect switch. USE COPPER WIRE ONLY. Rinnai Corporation Hydronic Air Handler Manual...
- Page 16 Installation System Low Voltage Wiring Diagrams IMPORTANT: Where possible, use a Rinnai factory authorized thermostat with the 37AHA series hydronic NOTE: Local codes may require thermostat wiring to Air Handlers. If a thermostat other than specified is be routed through conduit or raceways. In such used then refer to the manufacturer’s installation...
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Page 17: Dip Switch Options
Dip Switch Options (Smart Operating System): THERMOSTAT INSTALLATION: Safety Considerations: The Rinnai® exclusive Smart Operating System is a feature of your 37AHA series Hydronic Air Handler’s All wiring must conform to local and national electrical control system that is designed to allow the installer codes. - Page 18 The 37AHA unit in Open Loop configuration: “FS” Shunt selection: The “FS” logic sequence will 24VAC HOT configure the unit for operation with all Rinnai® V and 24 VAC COMMON VA series Tankless Water Heaters; this logic monitors the ratio of available flow for space heating (via Flow...
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Page 19: Start-Up Procedure
(If the pump does not start, or the Air Handler is not producing heat, refer to the Troubleshooting Section in this manual). STEP 4: Program room thermostat as desired by homeowner. Rinnai Corporation Hydronic Air Handler Manual... - Page 20 AND RETURN TO START GO TO 24 VOLTS TROUBLESHOOTING CHART IS 'LED' ON ‡ Refer to plumbing section in this manual Figure 20: Air Handler Start-Up and ‘LED’ Troubleshooting - Flow Sensor (FS Configuration) Rinnai Corporation Hydronic Air Handler Manual...
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Page 21: Troubleshooting
AMP DRAW RETURN TO START RECONNECT WIRES AND CONFIRM THAT WIRING IS AS PER WIRING DIAGRAMS SYSTEM CONTACT TECH. WORKING SUPPORT SYSTEM FINISH WORKING Figure 21: Blower System 115V Troubleshooting - Flow Sensor (FS) Configuration Rinnai Corporation Hydronic Air Handler Manual... - Page 22 AMP DRAW RETURN TO START RECONNECT WIRES AND CONFIRM THAT WIRING IS AS PER WIRING DIAGRAMS SYSTEM CONTACT TECH. WORKING SUPPORT SYSTEM FINISH WORKING Figure 22: Circulating Pump 115V Troubleshooting - Flow Sensor (FS) Configuration Rinnai Corporation Hydronic Air Handler Manual...
- Page 23 WORKING FINISH 24V BETWEEN CONDENSING UNIT AND PCB If a condensing unit and cased coil set is used in conjunction with the Rinnai Air Handler for cooling, refer to air conditioning manufacturer's instructions for hook-up and troubleshooting details. Figure 23:...
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Page 24: Sequence Of Operation
If the call for cool goes away while a call for energizes the circulating pump if the FS signal is heat exists, the cooling off delay is canceled and the present. blower operation reverts to the heat cycle. Rinnai Corporation Hydronic Air Handler Manual... - Page 25 (W), de-energizes the indoor blower motor and humidifier the circulator pump will immediately be energized. after a delay time as defined by the dip switch settings in Figure 15. Rinnai Corporation Hydronic Air Handler Manual...
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Page 26: Maintenance
60 Off Season Circulation Timer seconds and then start another 60 seconds with the All Rinnai® AHU models are equipped with a circulating pump energized to try to activate the Flow circulation timer. It is normal operation for these Sensor. -
Page 27: Selection Guide
1. Replacement capacitor must have same rating as originally furnished. 4. Pull cartridge out of the motor housing. Selection Guide Figure 24: Air Handler and Tankless Water heater Sizing Guidelines Rinnai Corporation Hydronic Air Handler Manual... - Page 28 The ACCA's Manual J Residential Load Calculation Filter Pressure Drop………..0.08 in. WC method is the established trade standard, approved by 0.08 inches if the included Rinnai filter is used; otherwise refer to ANSI, for the correct sizing and selection of Heating, the filter manufacturer’s installation instructions).
- Page 29 UNIT WEIGHT Shipping Installed (with water) Rinnai is continually updating and improving products. Therefore, specifications are subject to change without prior notice. † Tested in accordance with ANSI/ASHRAE Standard 37-1988 Side intake filter to be (1) 20”x20”x1” typical for all models.
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Page 30: Air Delivery Performance
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 37AHA04508KA5 (AH45) (Bottom or Right Side Return w/ Optional Side Filter Rack) AIRFLOW (CFM) 1-1/2 Ton A/C or HP 2 Ton A/C or HP Medium Hydronic Heat High 1090 1050 1000 830 ‡... -
Page 31: Specifications
The thermostat is designed to maintain +/-2°F accuracy. No batteries are required; temperature, blower, mode, and installer configuration settings are preserved with power off. Part Part Number AC Thermostat 603000018 Heat Pump Thermostat 603000021 Rinnai Corporation Hydronic Air Handler Manual... -
Page 32: Hydronic Air Handler Output
38.7 46.6 54.4 61.9 69.8 Legend Cubic Feet Per Minute External Static Pressure External Heat Source (Rinnai® V-Series Water Heaters) ‡ Factory Setting † Recommended Operating Point Notes (1) 1 MBH = 1000 Btuh (2) Air entering at 68ºF (3) Capacities are based on a piping arrangement with a total equivalent length of 100 ft. - Page 33 52.9 63.9 65.8 86.6 97.7 Legend Cubic Feet Per Minute External Static Pressure External Heat Source (Rinnai® V-Series Water Heaters) ‡ Factory Setting † Recommended Operating Point Notes (1) 1 MBH = 1000 Btuh (2) Air entering at 68ºF (3) Capacities are based on a piping arrangement with a total equivalent length of 100 ft.
- Page 34 65.9 76.5 87.4 98.4 Legend Cubic Feet Per Minute External Static Pressure External Heat Source (Rinnai® V-Series Tankless Water) Heaters ‡ Factory Setting † Recommended Operating Point Notes (1) 1 MBH = 1000 Btuh (2) For LS-Series only: to attain water temperatures settings of 150º F and 160º F use optional controller MCC-91-1US.
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Page 35: Wiring Diagrams
GREEN WHITE BLACK BLACK DANGER WARNING *ELECTRICAL SHOCK HAZARD USE COPP ER CONDUC TORS Wire Identification numbers *DISCONNECT POWER BEFORE ONLY SUITABLE FOR AT LEAS T for manufacturing use. SERVICING. 75° C. Figure 25 Rinnai Corporation Hydronic Air Handler Manual... - Page 36 GREEN WHITE BLACK BLACK DANGER WARNING *ELECTRICAL SHOCK HAZARD USE COPP ER CONDUC TORS Wire Identification numbers *DISCONNECT POWER BEFORE ONLY SUITABLE FOR AT LEAS T for manufacturing use. SERVICING. 75° C. Figure 26 Rinnai Corporation Hydronic Air Handler Manual...
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Page 37: Wiring Diagrams
GREEN WHITE BLACK BLACK DANGER WARNING *ELECTRICAL SHOCK HAZARD USE COPP ER CONDUC TORS Wire Identification numbers *DISCONNECT POWER BEFORE ONLY SUITABLE FOR AT LEAS T for manufacturing use. SERVICING. 75° C. Figure 27 Rinnai Corporation Hydronic Air Handler Manual... -
Page 38: Parts List
Top Fill 609000042 609000020 609000043 609000021 Lower Front Fill 607000012 609000022 607000013 609000023 Water Coil 607000014 609000024 607000015 609000025 Lower Front 609000044 Service Door 609000026 609000045 Coil Attachment 609000027 Bracket 609000046 609000047 609000048 Coil Support Rinnai Corporation Hydronic Air Handler Manual... - Page 39 608000020 Right Blower 609000058 Angle 605000019 1/3 HP Motor 605000020 1/2 HP Motor 605000021 3/4 HP Motor 605000022 1 HP Motor Motor Mount 609000059 608000021 608000022 Blower Wheel 608000023 608000024 Figure 30: Blower Assembly Rinnai Corporation Hydronic Air Handler Manual...
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Page 40: Limited Warranty
Reasonable Labor 1 Year * * Labor will only be covered when the air handler is connected to a Rinnai tankless water heater. Labor is not covered if connected to any other type or brand of unit. Rinnai Corporation Hydronic Air Handler Manual... -
Page 41: Limited Warranty
Rinnai will repair or replace the covered product or any part or component that is defective in materials or workmanship as set forth. Labor will only be covered when the Air Handler is connected to a Rinnai tankless water heater. Labor is not covered if connected to any other type or brand of unit. - Page 42 Notes Rinnai Corporation Hydronic Air Handler Manual...
- Page 43 Notes Rinnai Corporation Hydronic Air Handler Manual...
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Page 44: To Register Your Hydronic Air Handler Or Tankless Water Heater
• Bottom Air Discharge • 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). © 2006 Rinnai America Corporation...
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