Installation Manual

H-Series Demand Duo™ 2 Installation and Operation Manual 8
Model Number CHS398100CU
Dimensions (Assembled) in. (mm) w x h x d: 38.81 x 69.60 x 40.96 (985.8 x 1,767.8 x 1,040.4)
Weight
Rack (with 2 Tankless Water Heaters): 220 lbs (100 kg);
Tank: 310 lbs (141 kg) Complete System: 530 lbs (240 kg)
Installation Type Internal (Indoor) Commercial Applications
Category and Ignition System Category IV, Direct Electronic Ignition
Gas Consumption Btu/h (kW/h) Minimum: 30,400 (9) Maximum: 398,000 (116.6)
Water Supply Pressure 150 PSI (Maximum)
Temperature Setting 98°F (37°C) to 185°F (85°C)
Tank Volume 119 Gallons (450 Liters)
First Hour Delivery Rating* 543 Gallons (2,055 Liters)
Sound Level (Single unit) 49 dB
Electrical Data
(CU199 Tankless Water Heater)
Normal: 265 W, Standby: 44 W, Freeze Protection: 148 W, Max
Current: 5.5 A
Fuse: Tankless Water Heater Engine: 10 Amps, Pump Controller: 10 Amps
Gas Supply Pressure** Natural: 3.5 - 10.5 in. w.c. Propane: 8.0 - 13.5 in. w.c.
By-Pass Flow Control Electronic
Connections
Gas Supply Inlet: 1-1/2 in. MNPT Hot Water Outlet: 1-1/2 in. MNPT
Cold Water Inlet: 1-1/2 in. MNPT
Electric Connections
Appliance: AC 120 Volts, 60Hz.
Integrated Temperature Controller: DC 12 Volts (Digital)
Water Flow Control Water Flow Sensor, Electronic Water Control and Bypass Control
Water Temperature Control Simulation Feed Forward and Feedback
Recovery 459 GPH @ 100° ∆T
High Altitude Approved Up to 10,200 Ft (3,109 M)
Complies with South Coast Air Quality
Management District 14 ng/J or 20 ppm NOx
Emission Levels (CU199i)
Yes
Ultra Low NOx Yes
Certifications AHRI, ANSI Z21.10.3, CSA 4.3 and ENERGY STAR® Certified (CU199i)***
Controller (One per Tankless Water Heater) MCC-91-2US
Recovery Pump Grundfos UPS 26-150 (S)F; 3 Speed
Venting Material Polypropylene, PVC, CPVC
Venting Options
Concentric Polypropylene, Twin Pipe, or Common Vent Polypropylene/
PVC/CPVC. Vent lengths up to 150 ft.
Wi-Fi Ready Yes
*First Hour Delivery Rating is a theoretical calculation based on 70% usable tank capacity.
Tank Capacity x .70 + (recovery) = First Hour Delivery Rating
** Maximum gas supply pressure must not exceed the value specified by the manufacturer.
***ENERGY STAR® certification for the CU199 tankless engine is listed on the residential ENERGY STAR® website.