305, 505, 705 Indoor Manual
3
Specifications
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.
* Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature.
** for commercial and hydronic applications requiring higher temperatures
Model
305
505
705
Minimum Gas Consumption Btu/h
15,000
19,000
Maximum Gas Consumption Btu/h
180,000
199,000 Natural Gas
190,000 Propane Gas
237,000
Hot water capacity (Min - Max) *
0.6 - 7.5 GPM
(2.3 - 28.4 L/min)
0.6 - 9.4 GPM
(2.3 - 35.5 L/min)
0.6 - 9.8 GPM
(2.3 - 37 L/min)
Hot water capacity (45°F rise)
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
8.8 GPM (33.5 L/min)
Default Temperature Setting (no controller)
120º F (49º C)
Temperature Controller Default Setting
104º F (40º C)
Maximum Temp Setting (Commercial) **
160º F (71º C)
185º F (85º C)
Maximum Temp Setting (Residential)
Selectable at 120º F (49º C) or at 140º F (60º C)
140º F (60º C)
Minimum Temperature Setting
98º F (37º C)
Weight
50 lb (23 kg)
55 lb (25 kg)
Efficiency Rating
84%
Noise level
49 dB
Electrical Consumption
Normal
65 W
79 W
99 W
Standby
Anti-frost Protection
100 W
116 W
By-Pass Control
Fixed
Electronic
Minimum Gas Supply
Pressure
Natural Gas
5.0 inch W.C.
Propane
8.0 inch W.C.
Maximum Gas Supply
Pressure
Natural Gas
10.5 inch W.C.
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" MNPT
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)
Energy Star Qualified
Yes
Yes
No
2 W
