Sterling hydronic unit heaters
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Sterling Hydronic Unit Heaters. Steam and Hot Water Horizontal and Vertical. Horizontal Unit– Standard (Header Type). Available in steam or hot water Casing constructed out of 20 gauge die-formed steel Standard with adjustable horizontal louvers Totally enclosed fan motor standard

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Sterling hydronic unit heaters

Sterling Hydronic Unit Heaters

Steam and Hot Water

Horizontal and Vertical


Horizontal unit standard header type
Horizontal Unit– Standard (Header Type)

  • Available in steam or hot water

  • Casing constructed out of 20 gauge die-formed steel

  • Standard with adjustable horizontal louvers

  • Totally enclosed fan motor standard

  • (19) Sizes 18-360 MBH

  • Coil connections on top and bottom of unit

  • ETLc Certified


Horizontal standard coils
Horizontal Standard Coils

  • Cast bronze saddles braised to copper header

  • Copper tubing

  • Aluminum fins

  • Factory tested at 200 PSI

  • Max working pressure 150 PSI

  • Max steam temperature

    366 ⁰F

  • Pipe connections have internal threads for ease of connection


Horizontal unit serpentine
Horizontal Unit - Serpentine

  • Hot water only

  • Casing constructed out of 20 gauge die-formed steel

  • Standard with adjustable horizontal louvers

  • Totally enclosed fan motor standard

  • (4) Sizes 8-36 MBH.

  • Coil connections on side of unit

  • OSHA fan guard is standard

  • ETLc Certified


Horizontal serpentine coils
Horizontal Serpentine Coils

  • Coil is serpentine design with 3/8” copper tubing. Tubing connections shall be 3/8” copper tubing, type “M”

  • Aluminum fins

  • Factory tested at 200 PSI

  • Max working pressure 150 PSI

  • Pipe connections have internal threads for ease of connection


Vertical louvers horizontal units
Vertical Louvers (Horizontal Units)

  • Vertical louvers are available as a field installed accessory

  • Allows for the adjustment of airflow for 4-way air control


Vertical standard
Vertical – Standard

  • Available in steam or hot water

  • Casing formed by two square steel plates

  • Totally enclosed fan motor standard

  • (15) Sizes 41-705 MBH

  • Coil connections on top and bottom of unit

  • ETLc Certified


Vertical unit coil
Vertical Unit Coil

  • Copper coil with aluminum fins mechanically bonded to the tubes

  • Coils are tested at 375 PSI

  • Max working steam pressure of 75 PSI or hot water up to 225 PSI or 325 ⁰F

  • Threaded steel pipe coil connections


Vertical low output
Vertical – Low Output

  • Field knock-outs

  • (15) Sizes 34-620 MBH

  • Reduced temperature rise


Louvers vertical
Louvers (Vertical)

  • OSHA Fan Guards

  • Louver Cone Diffuser


Motors
Motors

  • Explosion Proof

  • Totally Enclosed


Steam pressure and water control
Steam Pressure and Water Control

  • Steam Pressure Control

  • Strap on Hot Water Control


Starter and speed control switch
Starter and Speed Control Switch

  • Manual Starter

  • 5.0 Amp Speed Control Switch


Phenolic coating
Phenolic Coating

  • V1 – Phenolic Coating (Air Dried)

    • The unit is coated with the HeresiteVR-514 coating.

    • It is a special primer-finish combination that is specifically designed for salt water services.

    • It is ideal for use in building located on or near the ocean or other large bodies of salt water.

  • V2 – Phenolic Coating (Baked)

    • The unit is coated with the Libcote-7-9818 coating.

    • It is specifically designed for use in moist, wet or damp environments.

    • It is ideal for use in waste water treatment plants or in spaces with excessive amounts of steam or humidity in the air.


Hs tstats
HS Tstats

  • U1- Line Voltage Stat “Off/Auto Switch”

  • U2 – Line Voltage Stat “Auto/Off/Fan Switch”

  • U3 – Line Voltage Stat “Auto/Off/ Fan Switch”


Tstats continued
Tstats Continued

  • U4 – Celsius Line Voltage Thermostat

  • (Fahrenheit version shown)

  • W1 – T6169C Line Voltage Thermostat w/Subbase (Light Duty) – (VS Only)


Vs tstats
VS Tstats

  • W2 – T4051A Line Voltage Thermostat (Heavy Duty)

  • W4 – Q651A1009 Stat Subbase Only (Used with T4051A1003 for “Off/Auto Switch”)


Disconnect
Disconnect

  • 460/575 Three Phase

  • 208/230 Three Phase

  • 115/230 Single Phase


Hs room layout
HS Room Layout

When selecting unit size and location keep the following items in mind:

  • How close will the unit be to people and small items? You don’t want a unit 4 feet from someone’s desk blowing 5,500 CFM at them

  • Always direct units toward areas of higher heat loss such as bay doors and truck loading docks

  • Fans with higher RPM will be louder than fans with lower RPM

  • See unit IOM for additional information