Brochure

46
Variable Fire Boilers
Up to 88% efficient, hot water
supply boiler with modulating
fire 4:1 turndown
The Art of Flexibility
The new VF Series variable fire copper tube boilers are designed with one thing in mind:
to provide the best value to the customer. As a result, we’re proud to introduce a more
installation-friendly line that works well in more applications and requires less
maintenance.
The secret to the stunning performance of the VF Series is its flexibility. The VF is capable
of firing from 100% to 25% or a 4:1 turndown ratio. The boiler’s output is based strictly
on the current system demand and required BTUs needed to maintain the desired system
set point temperature. The VF’s modulating capability is virtually limitless.
The VF Boiler sets a high efficiency standard by combining thermal efficiencies up to 88%
with a smoother, more energy-efficient overall system operation.
Small Size and Easy Service
Small Footprints, Zero Clearance To
Combustibles On Sides of Unit
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Compact design, lightweight copper
heat exchanger makes VF Series easier
to move and install in limited spaces—
perfect for retrofits
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Fits in an elevator, ideal for boiler
rooms with limited access—only
30˝ wide
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Multiple boiler systems provide
increased turndown and even
smoother, more efficient
system operation
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4 boilers w/4:1 turndown = 16:1 total
system turndown
Advanced Electronic Controls
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iCOMM™ Compatible and can be
monitored from remote locations. Call
1.888.WATER02 for more information
Category IV Listed
Meets the thermal efficiency
and standby loss requirements
of the U.S. Department of Energy
and current edition of
ASHRAE/IESNA 90.1
Low NOx Operation
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Complies with SCAQMD Rule 1146.2
and other Air Quality Management
Districts with similar requirements
for Low NOx emissions
Other VF
™
Boiler Features:
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ASME rated Pressure Relief Valve
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Factory-Mounted Flow Switch
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Low Gas Pressure Switch
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All Bronze Factory-Mounted Pump
(Standard on VW hot water
supply models)
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Digital Inlet/Outlet Temperature
Read Out
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Manual Reset Hi Limit
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Network ready for future
remote capabilities
5-Year Heat Exchanger Limited
Warranty (Domestic hot
water supply)
10-Year Heat Exchanger
Limited Warranty (Hydronic
heating applications)
CSD-1 Controls
VF
™
Boiler Approved Options*
*For optional boiler equipment, see
VF Boiler VB and VW spec sheets.
GALLONS PER DEPTH DEPTH
MODEL INPUT OUTPUT HOUR TEMP VENT HT. WIDTH W/ WO/ SHIP
NO. BTU/HOUR BTU/HOUR RISE –ºF CONN. PUMP PUMP WEIGHT
40 100 140
VW/VB-500 500,000 421,500 1268 507 362 6 56 30 37-1/2 30 450
VW/VB-750 750,000 633,750 1901 761 543 6 62 30 37-1/2 30 575
VW/VB-1000 1,000,000 845,000 2535 1014 724 6 71 30 37-1/2 30 750
VW/VB-1500 1,500,000 1,260,000 3780 1521 1080 7 67 30-1/2 60-1/4 37 925
VW/VB-2000 2,000,000 1,680,000 5040 2016 1440 7 72 30-1/2 60-1/4 37 1025
All dimensions in inches
VW AND VB MODELS
™
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