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 capacities with respect to temperature for 80 gallon storage tank