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Summary of Contents for Daikin UHH
- Page 1 Installation & Maintenance Data IM 907 Group: Fan-Coil Part Number: 668709201 Date: January 2008 Steam/Hot Water Unit Heaters Installation Instructions for Horizontal Air Delivery Model UHH and Vertical Air Delivery Model UDH Model UHH Model UDH...
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Page 2: Table Of Contents
Table of Contents Performance Data ............10-13 General Information ............. 2 Safety Information ..............3 Model UHH & UDH Motor Data & Power Codes 10 Model UHH - (Steam) High Motor Speed ....11 Inspection ..............3 Installation .................4-8 Model UHH - (Steam) Reduced Motor Speed ..11 Model UHH - (Hot Water) High Motor Speed ..12 Special Precautions ..........4 Model UHH - (Hot Water) Reduced Motor Speed 12 Locating Unit Heaters ..........4 Model UDH - (Steam) High Motor Speed ..... 13 Unit Heater Mounting Height ........5 Model UDH - (Hot Water) High Motor Speed ..13 Deflector Mounting .......... -
Page 3: Safety Information
WARNING Daikin representative immediately. The unit nameplate should be checked to make sure the voltage agrees with The installer must determine and follow all applicable the power supply available. codes and regulations. This equipment presents hazards of electricity, rotating parts, sharp edges, heat and weight. Failure to read and follow these instructions can result in IMPORTANT property damage, severe personal injury or death. -
Page 4: Installation
Do not install units in areas where corrosive fumes, caustic vapors or sprays are present. Units with power codes A, G, or I (UHH and UDH) must not be installed in potentially explosive or flammable atmospheres. Use unit heaters with power code V for these environments. -
Page 5: Unit Heater Mounting Height
Installation Unit Heater Mounting Height & Mounting Height Correction Factors Do not install unit above recommended maximum mounting heights or below the minimum height of eight feet. The height at which unit heaters are installed is critical. See Tables 1 thru 4. Maximum mounting heights for Model UDH is given for units with or without air diffusion accessories. Table 1. Horiz. Air Maximum Mounting Height and Spread Height-Ft./Spread-Ft. Height-Ft./Spread-Ft. Model Model Size Size UHH-108 UHH-18 UHH-24 UHH-121 UHH-165 UHH-33 UHH-47 UHH-193 UHH-63 UHH-258 UHH-86 UHH-290... -
Page 6: Deflector Mounting
No Deflector If an optional air deflector has been furnished for a unit, it is always shipped separately and can be attached to the unit before suspension. Vertical louvers for horizontal units can also be added and positioned before installation. Cone-jet and louver-type deflectors must be attached with angle brackets and machine screws to the bottom cover off the unit. Refer to mounting instructions which are furnished with each deflector. Depending on supply or return piping arrangement, there Cone-Jet is a possibility of interference between certain Anemostat air deflectors and piping on some vertical air delivery unit heaters. Check dimensions. Horizontal Delivery Units, Model UHH Series All horizontal delivery units have two tapped holes (3/8"-16) in the top for unit suspension. Piping support hangers or clamps are recommended and should be placed as close to the unit heater as possible. For other models, independent suspension can be made with threaded rods, pipes, or ceiling hanger brackets. See Truncone Figure 4. Vertical Delivery Units, Model UDH Series Models UDH-42 through UDH-161 have 4 tapped holes (1/2"-13) on the top surface for unit suspension. Suspension can be made with threaded rods, pipes, or ceiling hanger brackets. Models UDH-193 through UDH-610 have angle-iron frame mounting brackets for heavy-duty installation with applicable hardware. -
Page 7: Suggested Piping Arrangements
Horizontal Unit Heater Connected to Overhead Hot Water Mains Vertical Unit Heater Connected to Lower Hot Water Mains Steam Systems (UHH-18 through 86) Horizontal Unit Heater Side Connection for Low Pressure Steam Open Horizontal Unit Heater Side Connection for High Pressure Steam... -
Page 8: Piping
Installation Piping 7. Install a dirt pocket at the bottom of unit heater to 1. Branch piping to and from unit heater should be the collect dirt and scale as shown in figures on page 7. same size as unit connections and include swing Pipe diameter must be the same size as unit joints to allow for expansion and contraction of the connections and about six inches long. piping without placing a strain on the unit heater element. On steam systems, the branch piping should 8. Provide adequate pipe hangers, supports, or anchors be taken off and returned above the center line of the to secure the piping system independently of the unit supply and return line. heater. 2. Install pipe unions and shut-off valves in lines to Wiring Instructions and from each unit heater to allow maintenance or replacement of unit without shutting down and drain- DANGER ing entire system. For hot water systems, include a balancing valve in return line when possible for Disconnect all electric power including remote water flow regulation. In areas subject to freezing, disconnects before servicing. Failure to disconnect power before servicing can cause a drain valve should be installed below each unit severe personal injury or death. -
Page 9: Prior To Operation
4. Raise thermostat setting to desired position. auxiliary switch are required for one or more unit heat- 5. Adjust louvers (if provided) for desired heat distribution. ers, plus a two-position supply valve for each unit heater. 6. To insure proper sequence of operation, cycle unit on The room thermostat controls the two-position supply and off a few times by raising and lowering thermo- valve to each unit heater. An auxiliary fan switch stops stat setting. the unit heater fan when the supply valve is closed. The 7. Check for proper rotation of fan. All fans must rotate other thermostat (“Energy Saver” Control) is located near in a clockwise direction when viewed from the front the vertical unit heater at the ceiling or roof where warm (UHH) or bottom (UDH) of the unit heater. air tends to stratify. The room thermostat will automatically signal the supply Automatic Control valve to close when its setting has been “satisfied”. How- Control Sequences ever, the thermostat mounted near the unit heater can override the auxiliary switch to allow the unit heater fan The following control sequence descriptions are com- to run with the supply valve closed, until the temperature monplace for steam/hot water horizontal and vertical air at the higher level falls below the set-point of the higher delivery unit heaters. mounted thermostat. Continuous Fan Operation - Intermittent Hot/Cold... -
Page 10: Performance Data
Performance Data Horizontal & Vertical Air Delivery Models UHH & UDH Table 5. Motor Data & Power Codes VOLTAGE, MOTOR TYPE AND POWER CODE 115/60/1 230/60/1 230/460/60/3 115/208-230/60/1 Totally Enclosed w/ Thermal Totally Enclosed w/ Thermal Explosion Proof w/ Thermal... -
Page 11: Model Uhh & Udh Motor Data & Power Codes 10 Model Uhh - (Steam) High Motor Speed
Performance Data Horizontal Air Delivery Model UHH Table 6. Steam (High Motor Speed) Motor Data Air Data Model Unit Max. Heat Condensate Sq. Ft. Outlet Type Btu/Hr. Size Approx. Mounting Spread@ Sound lb./hr. Final Air Velocity Temp. (°F) Height Class** (ft.)*... -
Page 12: Model Uhh - (Hot Water) High Motor Speed
Performance Data Horizontal Air Delivery Model UHH Table 8. Hot Water (High Motor Speed) AIR DATA MOTOR DATA WATER DATA Model Unit Max. Heat Type Btu/Hr. Outlet Final Air Pressure Size Min./Max Spread@ Sound Approx. Mounting Velocity Temp. Drop (Ft. of... -
Page 13: Model Uhh - (Hot Water) Reduced Motor Speed 12 Model Udh - (Steam) High Motor Speed
Performance Data Vertical Air Delivery Model UDH Table 10. Steam (High Motor Speed) MOTOR DATA AIR DATA Model Unit Max. Heat Condensate Sq. Ft. Type Btu/Hr Outlet Approx. Size Mounting Spread@ Sound lb./hr. Final Air Velocity Temp. (°F) Height Class** (ft.)* Height* UDH-42... -
Page 14: Building Or Room Sound Zones
Performance Data Table 12. Sound Class Definitions Sound Type of Building or Room Sound Zone Zone Apartments, Class Rooms, Court Rooms, Executive Offices, Hospitals, Libraries, Museums, Residences General Offices, Hotel Dining Rooms, Private Offices, Recreation Rooms, Show Rooms, Small Stores, Tea Rooms, Upper Floors at Department Stores Bank Lobbies, Cafeterias, Drug Stores, General Offices, Grocery Stores, Gymnasiums, Main Floors at Department Stores, Public Buildings, Post Offices, Restaurants, Service Stations... -
Page 15: Dimensional Data
1. All dimensions in inches. 2. UHH-18 through UHH-86 have side NPT female pipe connections. 3. UHH-108 through UHH-340 have top and bottom NPT male pipe connections. 4. Units should be mounted a minimum of 5" from wall. IM 907 / Page 15 of 24... - Page 16 Dimensional Data Assembled Explosion Proof Horizontal Air Delivery Model UHX Dimensions Table 14. Dimensions – Model UHX UNIT SIZE UHX-18 6.54 18.539 4.78 13.139 4.8 21.5 0.67 8.47 15.75 UHX-24 UHX-33 6.54 0.67 10.484 18.539 4.78 11.805 4.8 21.5 15.75 UHX-47 UHX-63 6.54...
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Page 17: Explosion Proof Horiz. Model Uhx Dimensions . 16 Model Udh
Dimensional Data Vertical Air Delivery Model UDH Dimensions Unit Size 42, 59 Unit Size 78 through 610 Table 15. Dimensions – Model UDH APPROX. MALE NPT UNIT SIZE SHIPPING DIAMETER CONNECTIONS WT. LB. UDH-42, 59 -/4 3-1/4 1-1/2 6-/8 3-1/8 1-7/8 13-3/4 UDH-78, 95... - Page 18 Dimensional Data Assembled Explosion Proof Vertical Air Delivery Model UDX Dimensions Table 16. Dimensions – Model UDX UNIT SIZE UDX-42 5.6875 7.77 6.375 3.125 2.75 6.54 UDX-59 5.6875 7.77 6.375 2.75 6.54 3.125 UDX-78 7.77 2.75 6.54 6.625 6.375 3.125 UDX-95 6.625 7.77...
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Page 19: Explosion Proof Vert. Model Udx Dimensions
Service Diagnosis Fails to Maintain Temperature Unit Leaks 1. Undersized unit heater, boiler, pump or piping. 1. Loose connection. 2. Excessive exhaust air (exhaust fans may have 2. Internal corrosion. been added since heating installed). Employees Complain of Hot Blast 3. Unit heater operating at lower speed when sized to 1. Air stream aimed directly at employees. operate at high speed. 2. Louvers not adjusted properly. 4. Unit heater mounted too high - heated air not 3. Wrong type of diffuser (on verticals). delivered to floor level. 4. Excessive final air temperature. 5. Thermostat - improper location or setting, or not functioning. Unit Operates Too Long 6. -
Page 20: Maintenance
Maintenance Inspect Regularly For thorough cleaning of coil, remove motor and fan and spray a mild alkaline cleaning solution Under average conditions, it is recommended that unit over the coil. heaters be inspected before every heating season - more After a few minutes, follow by a hot water rinse. often in locations where air is contaminated with cor- (A steam gun can be used for spraying cleaning rosive fumes, dust, soot or oil spray. Check for dirty, solution and hot water.) clogged coils, excessive vibration and loose connections. Coils subjected to corrosive fumes should be checked and cleaned frequently. Motors B. Internal Corrosion Safeguards A. Cleaning 1. Provide controlled water treatment - don’t use Remove grease and dirt on motor during each excess of boiler compounds. Contact your boiler inspection or lubrication. Open frame motors should compound supplier for proper usage or the be blown clean every heating season, or whenever services of a water treatment laboratory. coils are cleaned, whichever is sooner. 2. Periodic internal flushing of the coils is B. Lubrication recommended in areas where water supply is 1. Lubricate motor according to manufacturer’s suspected of causing scale. Use an alka- instructions located on the motor. -
Page 21: Service Checklist
Maintenance Service Checklist Note to service technician: Fill in data for each unit. Leave this manual with owner as future service record. Installed Location/Identification ______________________________________________________________ Model Number ___________________________________________________________________________ Serial Number ____________________________________________________________________________ Power Code ______________________________________________________________________________ Control Code _____________________________________________________________________________ Date Service Dates Installed Proper Service Voltage Check for Leaks Check for Corrosion Clean Condenser Fins Check Fan Operation Lubricate Motor (Non-Detergent SAE 200) Serviced By (initials) IM 907 / Page 21 of 24... -
Page 22: Replacement Parts Information
When writing for service or replacement parts, direct your letters to Daikin Service and refer to the model they have all been designed, tested, and approved for the number and the serial number of the heater as stamped particular application to insure both physical and electri- cal fit and performance. Any substitution of parts or con- on the serial plate attached to the heater kit. If replace- trols not approved by the factory will be at customer’s ment parts are required, give the date of the heater kit installation and the date of the failure; also, give descrip- risk. tion of replacement parts and explanation of malfunction. Note: Daikin reserves the right to substitute parts of advanced design and to change specifications or prices Unit heaters used under excessive pressures or tempera- without advance notice or without incurring obligations. tures may have failures to the heat exchanger not covered under our warranty. Replacement parts can be obtained by submitting the model number, power code, control code and serial num- Unit heaters used in the presence of corrosive com- ber shown on the rating plate attached to the unit, along pounds may have failures to the heat exchange not cov- with a description of the part, to the factory. ered under our warranty. - Page 24 Warranty All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty. Consult your local Daikin Representative for warranty details. Refer to Form 933-43285Y. To find your local Daikin Representative, go to www.DaikinApplied.com.