The ultimate in energy efficiency and comfort PRODUCTS

COMBINATION BOILER

Combi Boiler

VRC-80 VRC-100 VRC-120 VRC-140

  • High efficient condensing combi boiler - AFUE 95%
  • 10:1 turndown ratio
  • Self calibration mode - Customizing of unit operation parameters
  • Utilizes existing ½” gas pipe up to 24’
  • Negative pressure gas valve provides constant performance at the low gas pressure situation
  • Built-in circulation pump
  • 2” PVC vent up to 60’(3” venting: up to 150”)
  • Full stainless steel heat exchanger construction
  • Simple conversion to propane - LP orifice is already in the box

SPECIFICATION

MODEL VRC-80 VRC-100 VRC-120 VRC-140
Heat Capacity(Input) Space Heating 19,900 - 80,000 BTU/H 19,900 - 100,000 BTU/H 19,900 - 120,000 BTU/H 19,900 - 140,000 BTU/H
Domestic Hot Water 19,900 - 155,000 BTU/H 19,900 - 180,000 BTU/H 19,900 - 199,000 BTU/H 19,900 - 199,000 BTU/H
Flow Rate (DHW) 45℉(25℃) Temp Rise 6.0 GPM (23 LPM) 6.9 GPM (26 LPM) 7.7 GPM (29 LPM) 7.7 GPM (29 LPM)
67℉(37℃) Temp Rise 4.0 GPM (15 LPM) 4.7 GPM (18 LPM) 5.2 GPM (20 LPM) 5.2 GPM (20 LPM)
AFUF Nature Gas(Propane) 95.0% (95.0%) 95.0% (95.0%) 95.0% (95.0%) 95.0% (95.0%)
Dimension ( W x H x D ) 18.1” X 27.6” X 11.6” (460 mm X 700mm X 295mm) 
Installation Indoor wall-mount
Venting Type Forced draft direct vent 
Ignition Electronic ignition
Water Pressure(Hydronic/DHW) 12 ~ 30 psi / 15 ~ 150 psi
Supply Pressure Natural Gas 3.5” ~ 10.5” WC
Propane 8” ~ 13”  WC
Minimum Flow Rate(DHW) 0.5 GPM (2.0 LPM)
Temperature Range Space Heating 120℉ ~ 180℉ (50℃ ~ 82℃)
DHW 98℉ ~ 140℉ (37℃ ~ 60℃)
Connection Size CH Supply / Return 1” NPT
Cold Water Inlet 3/4” NPT
Hot Water Outlet 3/4” NPT
Gas Inlet 3/4” NPT
Power Supply Main Supply 120V AC, 60Hz / use less than 5amp
Materials Primary Heat Exchanger Stainless steel
Secondary Heat Exchanger Stainless steel
Venting Exhaust / Intake 2” or 3” PVC, CPVC, Polypropylene
2” or 3” Special gas vent type BH (Class Ⅱ A/B/C)
Vent Clearances 0” to combustibles
Length 2” 60ft (18.3m)
3” 150ft (45.7m)
Safety devices Flame rod, APS, Overheat preventer, Low water cut off switch
Exhaust temperature high limit sensor, Power surge fuse
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