Sterling Hydronic Unit Heaters Steam and Hot Water Horizontal and Vertical
Feb 23, 2016
Sterling Hydronic Unit HeatersSteam 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
• (19) Sizes 18-360 MBH• Coil connections on top and
bottom of unit• ETLc Certified
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
• 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
• 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 are available as a field installed accessory
• Allows for the adjustment of airflow for 4-way air control
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
• 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 F⁰
• Threaded steel pipe coil connections
Vertical – Low Output
• Field knock-outs• (15) Sizes 34-620 MBH• Reduced temperature
rise
Louvers (Vertical)
• OSHA Fan Guards
• Louver Cone Diffuser
Motors
• Explosion Proof• Totally Enclosed
Steam Pressure and Water Control
• Steam Pressure Control
• Strap on Hot Water Control
Starter and Speed Control Switch• Manual Starter • 5.0 Amp Speed
Control Switch
Phenolic Coating• V1 – Phenolic Coating (Air Dried)
– The unit is coated with the Heresite VR-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• U1- Line Voltage
Stat “Off/Auto Switch”
• U2 – Line Voltage Stat “Auto/Off/Fan Switch”
• U3-STD – Line Voltage Stat “Auto/Off/ Fan Switch”
Tstats Continued• U4 – Celsius
Line Voltage Thermostat
• W1 – T6169C Line Voltage Thermostat w/Subbase (Light Duty) – (VS Only)
• U3-EXP -Line Voltage Stat “Heavy Duty, Explosion-proof”
VS Tstats• W2 – T4051A Line
Voltage Thermostat (Heavy Duty)
• W4 – Q651A1009 Stat Subbase Only (Used with T4051A1003 for “Off/Auto Switch”)
Disconnect
• 115/230 Single Phase
• 208/230 Three Phase
• 460/575 Three Phase
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