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305 Models
154.330020 & 154.330030
MODEL
Minimum gas consumption btu/h
Maximum gas consumption btu/h
Hot water capacity (Min - Max) *
Hot water capacity (45°F rise)
Default Temperature Setting (no controller)
Temperature Controller Default Temperature
Setting
Maximum Temp Setting (Residential)
505 Models
154.330060 & 154.330070
15,000
180,000 Natural Gas 199,000 Natural Gas
180,000 Propane Gas 190,000 Propane Gas
0.6 - 7.5 GPM 0.6 - 9.4 GPM
(2.3 - 28.4 L/min) (2.3 - 35.5 L/MIN)
6.6 GPM (25.0 L/min) 7.4 GPM (28.0 L!min) Natural Gas
7.1 GPM (26.9 L/min) Propane Gas
1200 F (490 C)
1040 F (400 C)
Selectable at 1200 F (490 C) or at 1400 F (600 C)
Minimum Temperature Setting 98o F (37o C)
Weight 50 Ib (22.7 kg)
Efficiency Rating 84%
Noise Level 49 dB
Electrical Normal 65 W 79 W
Consumption Standby 2.0 W
Anti-Frost Protection 100 W
By-Pass Control Fixed Electronic
Minimum Gas Natural Gas 5.0 inch W.C.
Supply Pressure Propane 8.0 inch W.C.
Maximum Gas Natural Gas 10.5 inch W.C.
Supply Pressure Propane 13.5 inch W.C.
Type of Appliance Direct Vent, Temperature controlled continuous flow gas hot water system
Operation With Or Without Temperature Controls, Mounted In Kitchen, Bathroom, Etc.
Approved Gas Type Natural Gas Or Propane - Ensure Unit Matches Gas Type It's Being Installed On.
Connections Gas Supply: 3/4" Mnpt, Cold Water Inlet: 3/4" Mnpt, Hot Water Outlet: 3/4"
Ignition System Direct Electronic Ignition
Electric Connections Appliance: Ac 120 Volts, 60hz. Temperature Control: Dc 12 Volts (Digital)
Water Temperature Control Simulation Feedforward And Feedback.
Water Supply Pressure Minimum Water Pressure: 20 Psi (Recommended 30-80 Psi For Maximum Performance)
Maximum Water Supply Pressure 150 PSI
Temperature Control Cable Non-Polarized Two Core Cable (Minimum 22 Awg)
Star Qualified Yes I Yes
Energy
I
Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature.
Specifications are subject to change without prior notice.
The maximum inlet gas pressure must not exceed the value specified by the manufacturer. The minimum value listed
is for the purpose of input adjustment.
305 & 505 Indoor Manual 7