MASCOT MSTWW, Installation And Operation Instructions Manual

Page: 5 / 68

Mascot ST Tankless Water Heater Page 3
Model Name MSTWW199
Gas Input Rate
MAX 199,000 Btu/h
MIN 19,900 Btu/h
Hot Water Capacity
35°F Rise 11.0 GPM
45°F Rise 8.5 GPM
77°F Rise 5.0 GPM
Installation Indoor Wall Hung
Flue System Sealed Combustion Direct & Single Vnet
Vent Run 2″(50ft) / 3″(100ft) Schedule 40 PVC, CPVC, PP, ABS
Gas Supply Pressure
NG 3.5˝ WC to 10.5˝ WC
LP 8.0˝ WC to 13.0˝ WC
Manifold Pressure
Gas Type NG LP
MAX Fire
-0.11” to -0.17” WC -0.07” to -0.11” WC
MIN Fire
-0.10” to -0.16” WC -0.06” to -0.10” WC
Power Supply
Main Supply 120V 60Hz / 4A
Maximum
Power Consumption
135W(82W+53W_Ceramic heater)
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
Burner System Single Orifice Premixed Fuel Modulation Metal Fiber Infrared
Gas Valve System Air ratio valve
Minimum Flow Rate 0.5 GPM
Internal Pipe Material STS 304
Dimensions W17.3 ″ – H28.7 ″ – D14.8 ″
Weight 88 lbs
Sub Heat Exchanger Water Capacity Under 2 Gallon
Control Panel / Main Controller P-920C / GTH-9500C
Water Pressure
MAX Hot water 150 psi
MIN 15 psi
Connection Sizes
Cold Water Inlet /
Hot Water Outlet
3/4″NPT
Gas Inlet 3/4″NPT
Materials
Casing Cold Rolled Carbon Steel
Heat Exchanger
Primary Heat Exchanger : STS 304
Secondary Heat Exchanger : STS 304
Safety Devices
Flame Rod, Overheat Cut Off Limit Switch , Gas Leak Detector
sensor, Exhaust Temperature High Limit Switch, Water Tem -
perature High Limit Switch, Frost Protection Ceramic Heater
2.2 Specifications
• Temperature
Operating ambient Temperature Range : -10 to 60°C.
Operating Relative Humidity up to: 90% at 40°C.
Shipping & Storage Temperature Range of : -20 to 80°C.