Steam/Hot Water Unit Heaters Horizontal Air Delivery Model UHH Vertical Air Delivery Model UDH Model UHH Units are listed by the Canadian Standards Association

Design Features Horizontal Air Delivery Model UHH Sturdy, mechanically bonded copper/aluminum coil with 12 fins per inch with 1/2˝ nominal tubes High Btu capacity Coils are tested at 275 psig air under water. Coils are suitable for operating up to 150 psig steam or 220 psig water and 375ºF Fins are continuous across width and depth of coil and are vertically oriented to resist collection of dirt and foreign particles Rugged 18-gauge casing protects against abuse Two piece enclosure allows for ease of maintenance Durable and attractive gray textured epoxy powder coating is standard Adjustable...

Design Features Vertical Air Delivery Model UDH Sturdy, mechanically bonded copper/aluminum formed coil with 12 fins per inch with 1/2˝ nominal tubes between extra-heavy steel pipe connections High Btu Capacity Coils are tested at 275 psig air under water. Coils are suitable for operating up to 150 psig steam or 220 psig water and 375ºF Fins are continuous along width and depth and are vertically oriented to resist collection of dirt and foreign particles Die-formed venturi outlet draws air through unit for maximum airflow Multiple arrangements available for unlimited air diffusion patterns Accessories...

Dimensional Data Horizontal Air Delivery Model UHH Unit Size 18 through 86 Unit Size 108 through 340 Table 1. Dimensions – Model UHH Unit Size APPROX. FAN NPT CONNECTIONS DIAMETER SHIPPING WT. LB. Notes: 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. Catalog 702 / Page of 36

Dimensional Data Unit Size 78 through 610 Angle Iron Frame for Table 2. Dimensions - Model UDH

Performance Data Horizontal Air Delivery Model UHH (Hot Water) Table 3. Hot Water (High Motor Speed) Unit Size WATER DATA Pressure Min./Max Drop (Ft. of GPM water) MOTOR DATA Heat Spread@ Max Height* Sound Class** Table 4. Hot Water (Reduced Motor Speed) Unit Size WATER DATA MOTOR DATA Pressure Drop (Ft. of water) Heat Spread@ Max Height* Sound Class** Notes: 1. Performance Data at Standard Conditions of 200°F Entering Water, 60°F Entering Air and 20°F Water Temperature Drop. * Units with horizontal louvers open 30° from vertical plane. ** See page 12 for Sound Class definitions.

Performance Data Horizontal Air Delivery Model UHH (Steam) Table 5. Steam (High Motor Speed) MOTOR DATA Unit Size Condensate lb./hr. Heat Spread@ Max Height* Sound Class** Table 6. Steam (Reduced Motor Speed) MOTOR DATA Unit Size Condensate lb./hr. Heat Spread@ Max Height* Sound Class** Notes: 1. Performance Data at Standard Conditions of 2 lb. Steam and 60°F Entering Air. * Units with horizontal louvers open 30° from vertical plane. ** See page 12 for Sound Class definitions.

Performance Data Horizontal Air Delivery Model UHH Table 7. Motor Data VOLTAGE, MOTOR TYPE AND POWER CODE 115/60/1 Unit Size Totally Enclosed w/ Thermal Overload Totally Enclosed w/ Thermal Overload Totally Enclosed Explosion Proof w/ Thermal Overload Power Code A: Motors are 115 volt, 60 Hertz, single phase, totally enclosed with built-in thermal overload protection and a permanent split capacitor to minimize current draw. Power Code G: Motors are 230 volt, 60 Hertz, single phase, totally enclosed with built-in thermal overload protection and a permanent split capacitor to minimize current draw....

Performance Data Vertical Air Delivery Model UDH Table 8. Hot Water (High Motor Speed) AIR DATA Unit Size WATER DATA Pressure Min./Max Drop (Ft. of GPM water) MOTOR DATA Heat Spread@ Max Height* Sound Class** 1. Performance Data at Standard Conditions of 200°F Entering Water, 60°F Entering Air and 20°F Water Temperature Drop. * Equipped with cone jet deflector, blades fully opened are shown in bold. Non-bolded mounting height/spread data is for units without deflectors. Please see page 31 for additional outlet accessory performance data. ** See page 12 for Sound Class definitions. Unit Size Table...

Performance Data Vertical Air Delivery Model UDH Table 10. Motor Data VOLTAGE, MOTOR TYPE AND POWER CODE 115/60/1 Unit Size Totally Enclosed w/ Thermal Overload Totally Enclosed w/ Thermal Overload Totally Enclosed Explosion Proof w/ Thermal Overload Power Code A: Motors are 115 volt, 60 Hertz, single phase, totally enclosed with built-in thermal overload protection and a permanent split capacitor to minimize current draw. Power Code G: Motors are 230 volt, 60 Hertz, single phase, totally enclosed with built-in thermal overload protection and a permanent split capacitor to minimize current draw....

Application Guidelines Application Guidelines for heat loss calculations should reference the ASHRAE Guide or other recognized HVAC engineering publication (or other authoritative source). Essential engineering data should include design conditions for the following: • • • • • • • • • BTU requirements CFM Final air temperature Steam or hot water applications Building type (architectural special needs, if any) Location and spacing of units Mounting heights Heat throw or air diffusion Sound classifications Horizontal Delivery Unit Heaters Characterized by its horizontal air delivery, this unit...

Application Guidelines Locating Unit Heaters 1. Always direct airflow to regions of greatest heat loss. 2. More, smaller units will provide better heat distribution than fewer larger units. 3. The number of units used depends on the heat throw or heat spread of the individual heaters. Arrange unit heaters to minimize piping costs. 4. More than any other single factor, improper mounting height is responsible for most unsatisfactory unit heater installations. When heaters are mounted higher than recommended, improper heat distribution is the result and comfort is reduced. • • Mount units at the...