Laars MFTHW199 - Page 6

LAARS Heating Systems
Page 4
2.2 Specications,125MBHand140MBH
Model Name MFTHW120 MFTHW140
Gas Input Rate
MAX 120,000 Btu/h 140,000 Btu/h
MIN 24,000 Btu/h 28,000 Btu/h
Installation Indoor / Wall hung type
Flue System
Sealed Combustion Direct / Single Vent /Sidewall
Vent
Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP
Orice Size
NG 0.213˝ (5.4mm) 0.255˝ (6.5mm)
LP 0.173˝ (4.4mm) 0.191˝ (4.85mm)
Gas Supply Pressure
NG 3.5˝ WC to 14.0˝ WC
LP 3.5˝ WC to 14.0˝ WC
Manifold Pressure
Gas type LP NG
Max re
-0.216 ˝ WC -0.216 ˝ WC
Min re 0.00 ˝ WC 0.00 ˝ WC
Power Supply
Main Supply 120V 60Hz / 4A
Maximum Power
Consumption
160W
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
Burner System
Single Orice Premixed Fuel Modulation Metal
Ceramic Infrared
Gas Valve System Combination modulating (Current proportional)
Dimensions W17.3˝ - H29.0˝ – D14.9˝
Weight 100 lbs
Main Controller / Control Display NGTB-900CP / P-950EH
Water Pressure CH Min 15 ~ Max 30 PSI
Connection Sizes
CH Supply/Return 1 ¼˝ NPT
Gas Inlet 3/4˝ NPT
Materials
Casing Cold Rolled Carbon Steel
Heat Exchanger
Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Safety Devices
Flame Rod, Overheat Cut Off Device, Gas Valve
Operation Detector, Water Temperature Sensor,
Over-heat Limit Switch,