Installation Guide

KBD Series Manual 47
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* Minimum ow may vary slightly depending on the temperature seng and the inlet water temperature.
Minimum acvaon ow is 0.4 GPM (1.5 L/min).
Our products are connually being updated and improved; therefore, specicaons are subject to change without prior noce.
The maximum inlet gas pressure must not exceed the value specied by the manufacturer. The minimum value listed is for the
purpose of input adjustment.
RUC80i RUC90i RUC98i RU80e RU90e RU98e
Minimum Gas Consumpon Btu/h 15,200
Maximum Gas Consumpon 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 Seng (no controller) 120° F (49° C) or 140° F (60° C)
Maximum Temp Seng (residenal) Selectable at 120° F (49° C) or at 140° F (60° C)
Maximum Temp Seng
(MCC-91-2 controller)
185° F (85° C)
Minimum Temperature Seng 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
Protecon
146 W 168 W
Max Current
Without recirculaon pump: 4 A
With recirculaon 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 connuous ow gas hot water system
Connecons Gas Supply: 3/4" MNPT, Cold Water Inlet: 3/4" MNPT, Hot Water Outlet: 3/4" MNPT
Ignion System Direct Electronic Ignion
Electric Connecons
Appliance: AC 120 Volts, 60Hz.
Temperature Controller: DC 12 Volts (Digital)
Water Temperature Control Simulaon 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 Qualied Yes
Cered for installaon in
manufactured (mobile) homes
Yes
Complies with South Coast Air
Quality Management District 14 ng/J
or 20 ppm NOx emission levels
Yes