Efficient * Flexible * Reliable
Gas and/or #2 Oil 500 to 13,750 MBH Output

Applications:

• Hydronic - working pressures 30 to 100 psi, operating temperatures 80° to 240°F, unrestricted flow
• Indirect - 125 psi finned copper tube heat exchanger, domestic hot water/swimming pools, antifreeze solutions/heat pump assist/underfloor
• Multi-purpose - 125 psi indirect with direct working pressure up to 75 psi, multiple distribution system modular heating plants, minimum footprint with optimum standby

Features of Series VW Vertical Firetube Boilers:

• Low Stress Design - single pass construction eliminates differential expansion forces across heads, permitting design return temperatures as low as 70°F and immediate cold starting response to all call for heat. Boilers are warranted for five years against thermal stress leaks regardless of return temperature.
• High Efficiency - series VW boilers are positive pressure non-condensing appliances. They are equipped with forced-draft burners for reliable 83% efficient combustion. High temperature fiberglass rope is used to gasket burner flanges to burner ports and steel lids to flue-gathering chambers. Custom fabricated bent steel turbulators installed in firetubes limit flue gas velocity, insuring maximum heat transfer. Heat losses associated with draft hoods and barometric dampers are eliminated and breeching stack sizes can be reduced.
• Steel Skids - structural channel skids create a space (3" minimum) beneath boiler shells which may permit elimination of a poured concrete pad. Boilers can be rolled into place on steel pipes, lever into precise position, and easily/securely leveled by shimming of skids.
• Compact Size - individual boiler modules will often fit through existing doors, hallways, elevators, etc. Relatively light weights simplify location of heating plants anywhere within building, from basement to penthouse, and boilers can be grouped in any configuration for best utilization of designed or available spaces.

Advantages of Series VW Modular Heating Plants

• Low Operating Cost - optimal plant turndown plus prevention of flow through non-operating units insures maximum partial load efficiency with minimum heat loss. Heating plant control packages with time/temp inputs (integral digital electronic or provision for interface with building EMS) and delayed logic sequencing (adjustable time or fluid temp sampling via PLC or relay circuitry) completely eliminate unnecessary mild weather operation and control overshoot.
• Standby Protection - effective standby is inherent in the modular concept. Interruption of service is unnecessary for inspection/repair of individual modules.
• Flexibility - boilers are available for full or partial output indirect heating. A single modular heating plant installation can efficiently handle two or more different heating loads. For maximum total heating plant capacity with minimum footprint, heat-exchanger equipped and hydronic only modules may be combined as necessary. In the event of future building or load expansion, the installation of add-on modules is simple and ost-effective.
• Experience - field proven boilers and components. Modular heating plant design and control principles have been refined during more than 20 years in the energy efficient heating plant business.
• Single Source Responsibility - complete matched component modular heating plant package for trouble free system setup and maintenance. LES agents can arrange for startup and service by qualified industrial boiler/burner service personnel.
• Best Overall Value - practical factors including ease of rigging and setting, effective space utilization, pre-wiring, dual direct hydronic/indirect capability, and elimination of excess standby capacity often combine to cancel the apparent initial cost advantages of large stand-alone boilers. Even before operating savings are calculated, actual cost of installing a modular heating plant may be less than the cost of installing less efficient alternatives