Navien NHB Series, Installation & Operation Manual

Page: 106 / 135

106 Operating the Boiler
Ɣ Eco
This mode increases the condensing effectiveness and quickly responds to a large amount of load changes. However, it requires additional
unit operation time (Low Off HC) and sensitively responds to a small amount of load changes (Small On/Off gap).
95% 47.5% 47.5% 95% 95%
63.3%
60%
63.3% 63.3% 100% 100% 100%
45% 45%
30%
30%
30% 30%
30%
Unit ON
Unit ON
Unit OFF
Unit OFF
60% 30%
30%
60%
60%
40% 40% 40%
Ɣ
Boost
This mode minimizes the total unit operation time. However, it decreases the condensing effectiveness.
100%
47.5% 47.5% 95% 95%
63.3% 63.3% 63.3% 100% 100% 100%
75.5% 75.5%
50%
50%
30% 30%
50%
Unit ON
Unit ON
Unit OFF
Unit OFF
30%
30%
60% 60% 47.5% 47.5% 95% 95% 60% 95% 95%
50% 50%