48 KBD Series Manual
* Minimum ow may vary slightly depending on the temperature seng and the inlet water temperature.
Minimum acvaon ow is 0.4 GPM (1.5 L/min).
Our products are connually being updated and improved; therefore, specicaons are subject to change without prior noce.
The maximum inlet gas pressure must not exceed the value specied by the manufacturer. The minimum value listed is for the
purpose of input adjustment.
RUC80i RUC90i RUC98i RU80e RU90e RU98e
Minimum Gas Consumpon Btu/h 15,200
Maximum Gas Consumpon Btu/h 152,000 180,000 199,000 152,000 180,000 199,000
Hot water capacity (Min - Max) *
0.26 - 8.0 GPM
(1.0 - 25 L/min)
0.26 - 9.0 GPM
(1.0 - 29 L/min)
0.26 - 9.8 GPM
(1.0 - 32 L/min)
0.26- 8.0 GPM
(1.0 - 25 L/min)
0.26 - 9.0 GPM
(1.0 - 29 L/min)
0.26 - 9.8 GPM
(1.0 - 32 L/min)
Temperature Seng (no controller) 120° F (49° C) or 140° F (60° C)
Maximum Temp Seng (residenal) Selectable at 120° F (49° C) or at 140° F (60° C)
Maximum Temp Seng
(MCC-91-2 controller)
185° F (85° C)
Minimum Temperature Seng 98° F (37° C)
Weight 61.7 lb (28 kg)
Energy Factor 0.96 0.96
0.95
0.96 0.96
0.95
Noise level 41 dB 52 dB
Electrical Data
Normal 75 W 71 W
Standby 2 W
An-frost
Protecon
146 W 168 W
Max Current
Without recirculaon pump: 4 A
With recirculaon pump: 8 A (exact value depends on the pump)
Fuse 10 A
By-Pass Control Electronic
Gas Supply Pressure
Natural Gas 4.0 - 10.5 inch W.C.
Propane 8.0 - 13.5 inch W.C.
Type of Appliance Condensing, Tankless, Temperature controlled connuous ow gas hot water system
Connecons Gas Supply: 3/4" MNPT, Cold Water Inlet: 3/4" MNPT, Hot Water Outlet: 3/4" MNPT
Ignion System Direct Electronic Ignion
Electric Connecons
Appliance: AC 120 Volts, 60Hz.
Temperature Controller: DC 12 Volts (Digital)
Water Temperature Control Simulaon Feed forward and Feedback
Water Supply Pressure Minimum Water Pressure: 50 PSI (Recommended 60-80 PSI for maximum performance)
Maximum Water Supply Pressure 150 PSI
Remote Control Cable Non-Polarized Two Core Cable (Minimum 22 AWG)
Energy Star Qualied Yes
Cered for installaon in
manufactured (mobile) homes
Yes
Complies with South Coast Air
Quality Management District 14 ng/J
or 20 ppm NOx emission levels
Yes