model blower coils are shipped completely assembled, reducing field installation time and labor. All units are thoroughly inspected and tested prior to shipment, eliminating potential problems at startup. Motor wiring is brought to a junction box and terminated. The junction box is located on the outside of the unit casing, reducing electrical hook-up time. A wide variety of fan discharge configurations allow for increased flexibility and easier installation on the jobsite, resulting in cost reductions by eliminating expensive elbows, etc. 

​​Model VB/VR Belt Drive Blower Coils offer a wide range of application flexibility, while maintaining a simple, easy to install unit design. These units are intended to provide comfort cooling and heating within a small footprint. They may be applied in many types of building structures including schools, office buildings, hospitals, condominiums, assisted living facilities, apartments or stores. Applications can be constant or variable volume. There are many applications the VB/VR product can be utilized. Some examples are listed below.

Constant volume applications:

  • Two-pipe hydronic system for cooling and/or heating
  • Two-pipe hydronic cooling system with electric heat
  • Four-pipe system with dedicated heating and cooling coils
  • Direct Expansion (DX) split systems with hydronic heat
  • Direct Expansion (DX) split systems with electric heat

Variable volume applications:

  • Two-pipe hydronic system for cooling and/or heating
  • Two-pipe hydronic cooling system with electric heat
  • Four-pipe system with dedicated heating and cooling coils


​STANDARD FEATURES
Construction

  • Galvanized steel cabinet construction, minimum 18 gauge
  • 1” thick 1.6 lb/ft3  scrim reinforced foil faced insulation, glued, taped and pinned in place
  • 1” supply duct collars
  • Gasketed, removable access panel sized for easy handling
  • IAQ galvanized steel drain pan with 1 1/8” ODM copper pipe outlet
  • Left and right hand arrangement

Fan Assembly

  • Forward curved (double width, double inlet) fans
  • Statically and dynamically balanced
  • Solid steel shafting
  • Ball bearings with a minimum design average life (L50) of 100,000 hours

Fan Motor and Drive

  • NEMA design ODP motors
  • 1750 RPM single speed, 60 Hertz
  • Single phase motors with inherent thermal protection
  • Three phase motors
  • Rigid mount adjustable motor base
  • Standard cross section “V-belt” drive with 1.2 service factor
  • Adjustable pitch motor pulley and fixed pitch blower pulley

Coils

  • AHRI 410 certified and labeled
  • 1/2” O.D. seamless copper tubes
  • Collared and corrugated aluminum fins
  • Manual air vent plug on all water coils
  • 300 PSIG working pressure at 200°F
  • Steam coils rated at 15 PSIG maximum
  • Copper ODM sweat connections
  • 0.016” tube wall on water and evaporator coils
  • 0.025” tube wall on steam coils
  • High efficiency aluminum fin surface for optimizing heat transfer, pressure drop and carryover

Filters and Filter Rack

  • Top access flat filter rack (VR only)
  • Front access filter rack (VB only)
  • Standard size 2” nominal throwaway filters

Electrical

  • Fan motor wired and terminated to J-box
  • All units ETL listed in compliance with UL/ANSI Standard 1995


OPTIONAL FEATURES
Construction

  • IAQ stainless steel drain pan with 1” MPT galvanized pipe outlet
  • External rubber-in-shear or spring type vibration isolators, floor mount
  • Fan discharge arrangements
  • Discharge plenum w/ dbl. deflection discharge grille
  • Access panel with lift and turn fasteners
  • Double wall access panel w/lift and turn fasteners
  • Return plenum with removable panels (ACB only)
  • Base rails with rigging slots factory assembled and installed

Fan Motor and Drive

  • TEFC motors
  • High efficiency motors

Coils

  • 4 and 6 row chilled water or R22 DX coils
  • 1 and 2 row hot water coils
  • 1 and 2 row hot water or standard steam coils in discharge coil section only
  • Hot water coil in preheat or reheat position
  • Stainless steel coil casings
  • 0.025” tube wall on water and evaporator coils
  • Auto air vents on water coils

Filters and Filter Rack

  • Side access filter rack (VR only)
  • 2” pleated filter
  • Spare throwaway or pleated filters

Inlet Damper Section (VR rear return unit)

  • Factory assembled and installed
  • Heavy gauge galvanized steel formed blade dampers
  • Low-leak dampers with extruded vinyl blade seals and flexible metal jamb seals
  • Parallel blade operation
  • Interconnecting damper linkage

Electrical

  • Motor wiring in conduit
  • Motor starter (contactor with overload for three phase; contactor for single phase), factory installed (mounted and wired)
  • Door interlocking disconnect switch (non-fused) (with main fusing)
  • Hand off auto switch (HOA)
  • Main fusing

Electric Heat Section

  • Factory mounted electric heater with single point power connection, ETL listed as an assembly

Enviro-Tec Blower Coil Units



H & V Series C Belt Drive

VB/VR Series C Belt Drive


Both Horizontal and Vertical Belt Drive Blower Coils are designed to maximize flexibility of selection and installation.

Enviro Tec logo

Enviro-Tec 


H & V Belt Drive Blower Coils


Model H & V Belt Drive Blower Coils offer a wide range of application flexibility, while maintaining a simple, easy to install unit design. These units are intended to provide comfort cooling and heating within a small footprint. They may be applied in many types of building structures including schools, office buildings, hospitals, condominiums, assisted living facilities, apartments or stores. Applications can be constant or variable volume. There are many applications the H & V product can be utilized. Some examples are listed below.

VB/VR Reduced Footprint Belt Drive  Blower Coils


The ENVIRO-TEC VB/VR Belt Drive Blower Coils give maximum flexibility for selection and installation where extreme space restrictions exist. The units are designed with a slant coil and all front access to minimize the space used for installation. All VB/VR


Constant volume applications:

  • Two-pipe hydronic system for cooling and/or heating.
  • Two-pipe hydronic cooling system with electric heat.
  • Four-pipe system with dedicated heating and cooling coils.
  • Direct Expansion (DX) split systems with hydronic heat.
  • Direct Expansion (DX) split systems with electric heat.

Variable volume applications:

  • Two-pipe hydronic system for cooling and/or heating.
  • Two-pipe hydronic cooling system with electric heat.
  • Four-pipe system with dedicated heating and cooling coils


These floor mounted or ceiling hung units can be installed with external vibration isolation on a base rail (H or V) or hanger rods (H only) at the corner points. This requires flex connections at the corner brackets, ductwork, electrical connections and piping connections. One of the most important and basic IAQ issues is condensate management. The first step to trouble-free operation is proper installation. It is very important that the unit be mounted high enough so that the condensate drain from the unit may be properly trapped. Please refer to the H & V IOM Manual at www.enviro-tec.com for specifics on this issue. As with all HVAC systems, these units should be installed according to all applicable ASHRAE standards, SMACNA and local code requirements.


​STANDARD FEATURES
Construction

  • Galvanized steel cabinet construction, minimum 18 gauge
  • 1” thick fiberglass insulation
  • 1” supply duct collars
  • Gasketed, removable access panels sized for easy handling
  • IAQ galvanized steel drain pan (not included with heating-only units)
  • Left and right hand arrangement

Fan Assembly

  • Forward curved (double width, double inlet) fans
  • Statically and dynamically balanced
  • Solid steel shafting
  • Ball bearings with a minimum design average life (L50) of 100,000 hours

Fan Motor and Drive

  • NEMA design ODP motors
  • 1750 RPM single speed, 60 Hertz
  • Single phase motors with inherent thermal protection
  • Three phase motors
  • Rigid mount adjustable motor base
  • Standard cross section “V-belt” drive with 1.2 service factor
  • Adjustable pitch motor pulley and fixed pitch blower pulley

Coils

  • Coils are designed, manufactured and tested by ENVIRO-TEC
  • AHRI 410 certified and labeled
  • 1/2” O.D. seamless copper tubes
  • High efficiency aluminum fin surface for optimizing heat transfer, pressure drop and carryover
  • Mechanically expanded copper tubes leak tested to a minimum 450 PSIG air pressure under water
  • Manual air vent plug on all water coils
  • Copper ODM sweat connections
  • 300 PSIG working pressure at 200°F
  • Evaporator coils are factory sealed and charged with a minimum of 5 PSIG nitrogen or refrigerated dry air
  • Steam coils rated at 15 PSIG maximum operating pressure at about 35°F
  • 0.016” tube wall thickness (0.025” on steam)

Filters and Filter Rack

  • Hinged side access flat filter rack
  • Standard size 2” nominal throwaway filters
  • Filter rack designed to accept 2” filters

Electrical

  • Fan motor wired and terminated to J-Box
  • All units cETL listed in compliance with UL/ANSI Standard 1995


OPTIONAL FEATURES
Construction

  • IAQ stainless steel drain pan with 1” MPT galvanized pipe outlet
  • External rubber-in-shear or spring type vibration isolators, hangers or floor mount
  • Fan discharge arrangements
  • Scrim reinforced foil faced insulation
  • Hinged access panels with lift and turn fasteners
  • Base rails with rigging slots factory assembled and installed
  • Auxiliary (secondary) drain connections

Fan Motor and Drive

  • High efficiency motors
  • TEFC motors

Coils

  • 3, 4 and 6 row chilled water or DX coils
  • 1 and 2 row hot water or standard steam coils
  • Heating coil in preheat or reheat position
  • Coil connections opposite handing
  • Stainless steel coil casings
  • Automatic air vents on water coils
  • Heat pump compatible cooling coils
  • 0.025” tube wall thickness

Filters

  • 2” pleated filter
  • Spare throwaway or pleated filters
  • High efficiency filter rack with 2” and 4” filters

Inlet Damper Section

  • Factory assembled and installed
  • Heavy gauge galvanized steel formed blade dampers
  • Low leak dampers with extruded vinyl blade seals and flexible metal jamb seals
  • Parallel blade operation
  • Interconnecting damper linkage

Electrical

  • Motor wiring on conduit
  • Motor starter (contactor with overload for three phase; contactor for single phase), factory installed (mounted and wired)
  • Door interlocking disconnect switch (non-fused)
  • Hand off auto switch (HOA)
  • Main fusing

Electric Heat Section

  • Factory mounted electric heater with single point power connection, cETL listed as an assembly
Enviro Tec VB VR Reduced Footprint BCU
Enviro Tec H and V Blwr Coil
33 Years of Combined Experience
361-882-2233

          Steve Lewis LLC dba

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