INSTALLATION AND OPERATION INSTRUCTIONS
VFC 15-150, VFC 45-225 MODULATING GAS BOILERS
3
SPECIFICATIONS
SPECIFICATION VFC 15-150 VFC 45-225
CSA Input (Natural Gas or Propane) - MBH
CSA Input (Natural Gas or Propane) - kW
CSA Output - MBH
CSA Output - kW
15 - 150
4.4 - 44
14 - 139
4.1 - 41
45 - 225
13 - 66
41 - 206
12 - 60
A.F.U.E. 95% 95%
Minimum gas supply pressure (Natural Gas or
Propane) - inch w.c.
3
3
3
3
Maximum gas supply pressure (Natural Gas or
Propane) - inch w.c.
14
14
14
14
Power use (120Vac/60Hz) @ full re - Watts
(excluding pumps)
57 167
Weight (shipping) - lbs/Kg 165 / 75 168 / 76
Pressure vessel water content - USG/Litres 2.4 / 9 2.4 / 9
Maximum boiler ow rate - USgpm 16 25
Minimum boiler ow rate - USgpm 4 8
Maximum operating water pressure* - psig 80 80
Minimum water pressure - psig 8 8
Normal ue temperature @ 100°F boiler return
water temperature - high re
100 to 105 °F
37.8 to 40.5°C
100 to 105 °F
37.8 to 40.5°C
Normal ue temperature @ 160°F boiler return
water temperature - high re
160 to 165 °F
71.1 to 73.9°C
160 to 165 °F
71.1 to 73.9°C
Approved installation altitude - ASL 0 - 12,000’ 0 - 12,000’
Ambient temperature - Low (°F-°C)
Ambient temperature - High (°F-°C)
32°F / 0°C
122°F / 50°C
32°F / 0°C
122°F / 50°C
Max. relative humidity (non-condensing) 90% 90%
Minimum water temp. 34°F / 1.1°C 34°F / 1.1°C
Maximum water temp. (electronic hi-limit) 190°F / 87.8°C 190°F / 87.8°C
Maximum water temp. (mechanical hi-limit) 200°F / 93.3°C 200°F / 93.3°C
Max. ΔT - supply/return (electronic fence) 40°F 40°F
Maximum equivalent vent length - 2”
Each side (Vent & Air Intake)) - 3”
(Natural Gas or Propane)
Air intake options: either direct vent or indoor
supply
50’
120’
N/A
240’
* boilers are shipped with 30 psig pressure relief valve