Installation Manual
Demand Duo™ R-Series Installation and Operation Manual 8
Product Number CHS19980RiN CHS19980RiP
Product Description Automatic Circulating Tank Water Heater
Installation Type Indoor
Minimum Gas Consumption Btu/hr (kW/hr) 23,000 (6.7)
Maximum Gas Consumption Btu/hr (kW/hr) 199,000 (58.3)
Tank Volume
80 Gallons
(303 Liters)
First Hour Delivery at 100°F Rise
249 Gallons
(942 Liters)
Temperature Setting 120°F (49°C) to 180°F (82°C)
Product Weight 320 lb (145 kg)
Noise level 47 dB
System Electrical
Data
Normal 237 W
Standby 2 W
Freeze Protection (tankless) 260 W
Max Current 9.0 A
Fuse Tankless Engine - 10 A
Electric Connections
Appliance: AC 120 Volts, 60Hz.
By-Pass Control Electronic
Gas Supply Pressure
Gas:
4.0 - 10.5 inch W.C.
Propane:
8.0 - 13.5 inch W.C.
Connections
Gas Supply Inlet - 3/4 in. MNPT
Hot Water Outlet - 1-1/2 in. MNPT
Cold Water Inlet - 1-1/2 in. MNPT
Ignition System
Direct Electronic Ignition
Maximum Water Supply Pressure
150 PSI
Meets or exceeds energy efficiency requirements of ASHRAE 90.1b (current standard), C.E.C. Listed 80%
Recovery Efficiency.
RECOVERY CAPACITIES
Tank Capacity
U.S. GALLON/HR LITERS/HR AT TEMPERATURE RISE INDICATED
°F 30°F 40°F 50°F 60°F 70°F 80°F 90°F 100°F 110°F 120°F 130°F 140°F
°C -1°C 4°C 10°C 16°C 21°C 27°C 32°C 38°C 43°C 49°C 54°C 60°C
CHS19980RiN/
CHS19980RiP
80 U.S.
Gals.
GPH 643 482 386 322 276 241 214 193 175 161 148 138
303
Liters
LPH 2,435 1,826 1,461 1,217 1,044 913 812 730 664 609 562 522
Table 1: Recovery capacies with respect to temperature for 80 gallon storage tank