12
Eternal Hybrid Water Heater Technical Specifications
GU20DV (Optional)
GU26DV
GU28DV (Optional)
GU32DV
505(11,12)1201
505(11,12)1261
505(11,12)1281
505(11,12)1321
Installation
Flue system
Operation
Min
Max
145,000 BTU/Hr
180,000 BTU/Hr
199,000 BTU/Hr
236,000 BTU/Hr
NG
LP
NG
LP
Min
0.9 "WC
0.9 "WC
0.4 "WC
0.4 "WC
Max
1.6 "WC
2.4 "WC
1.75 "WC
2.4 "WC
106 mA
131 mA
106 mA
126 mA
CO
NOx
Flue Temp
0.1 - 12.8 gpm
0.1 - 15.8 gpm
0.1 - 17.5 gpm
0.1 - 20.8 gpm
Gas
Cold water
Hot water
T&P Valve, Flame Rod, Thermal Fuse (307F), Remaining Flame Detector, Fan RPM Detector,
Freeze Protection (-4F), Vent Blockage Detection, Thermostat Switch (194F), Thermostat Switch
(221F), Ignition Prevention, GFCI Leakage Breaker w/3A fuse, Mixing Valve, User Selectable
Maximum Temperature Lock.
Simulation Feedforward and Feedback w/Electronically Controlled Mixing Valve
100,102,104,106,108,110,112,114,116,122,131,140(default),149,158,167 (15 steps)
3/4 inches NPT Female
3/4 inches NPT Female
3.8 gal
6.4 gal
17.3" x 40.9" x 22.8"
86%
204.4
120 Volts 60 Hz
Electrical Consumption
3/4 inches NPT Female
Model Name
Ignition
Type
Flow Capacity Range
Burner System
Operating water pressure
Orifice Size
Maximum Valve Current
Manifold
Pressure
Gas Valve Type
Unit Dimensions (WxHxD)
Electrical Power Supply
Unit Weight (lbs)
Gas Input
Gas Supply
Pressure
Combustion
Analysis
Temperature Settings
Thermal Efficiency
Packaged Weight (lbs)
Single Orifice Fuel Injection Pre-Mixing Cylindrical Metal Fiber Infrared Burner w/Full Modulation
3.5 - 10.5 "WC
8.0 - 14 "WC
Water Holding Capacity
Under 55 PPM
Under 185 F
15 to 150 psi
Tank Thermistor, Inlet Thermistor, Outlet Thermistor, Burner Thermistor, Air Thermistor
60 dB
Water Flow Sensing
Water Temperature Control
Connections
Package Dimensions (WxHxD)
20.5" x 38.3" x 24.8"
20.5" x 45.7" x 24.8"
175.1
151.8
180.2
Safety Devices
Model Number (CSA)
Maximum Noise Level
48 dB
Indoor Only
Sealed Combustion Direct Vent
With or Without Remote Controls
Direct Electronic Ignition and Automatic Flame Sensing
Under 100 PPM
Current Controlled Double Stage Negative Pressure Full Modulation Gas Valve
Water Temperature Sensing
17.3" x 33.5" x 22.8"
47,500 BTU/Hr
6.4 mm
7.4 mm
5.1 mm
5.7 mm
Standby - 8 watts, Maximum - 84 watts
Standby - 8 watts, Maximum - 105 watts
Water Flow Sensor w/Built-in Display
T&P Valve, Flame Rod, Thermal Fuse (307F), Remaining Flame Detector, Fan RPM
Detector, Freeze Protection (-4F), Vent Blockage Detection, Thermostat Switch (194F),
Thermostat Switch (221F), Ignition Prevention, GFCI Leakage Breaker w/3A fuse, Mixing
Valve, User Selectable Maximum Temperature Lock.
