Application Manual

| Infiniti™ K 160-19913 Application Manual
Data subject to change 10.2018 | Bradford White Water Heaters
4.3.2 DOMESTIC HOT WATER RECIRCULATION WITH EXTERNAL PUMP
The following drawing is provided to outline one possible
recirculation design. This schematic is for illustration only and must
not be used for actual installation without appropriate engineering
and technical advice from a properly licensed professional in the
locality where the installation is made.
Fig. 29 Recirculation application
Comfort level
Delta T (˚F)
1 18
2 16
3 14
4 12
5 10
6 8
7 6
8 4
9 2
[1] Cold water supply
[2] Check valve
[3] Circulator pump
[4] Expansion tank
[5] Shuto valves
[6] PRV
[7] RTG-K-160/199N/Xl
4.3.3 ADJUSTING THE RECIRCULATION SETTINGS
The pump and burner turn ON and OFF based on a delta between
the set point temperature on the water heater and the inlet water
temperature sensor value. This delta is called the comfort level.
The higher the comfort level, the smaller the delta between the
set point temperature on the water heater and the inlet water
temperature sensor value, resulting in a hotter recirculation
system.
The smaller the comfort level, the larger the delta between the
set point temperature on the water heater and the inlet water
temperature sensor value, resulting in a cooler recirculation system.
Below is a graph illustrating how the comfort level value changes
the recirculation system's temperature.
Fig. 30 Pump activation and deactivation thresholds
A higher comfort level will result in longer pump run
times, which will consume more electricity and gas.
The comfort level can be adjusted to achieve the desired balance
between readiness of hot water at the point of use and energy
consumption.
Table 17 RS Menu
| Infiniti® K 160-199 Application Manual
Data subject to change 10.2019 | Bradford White Water Heaters
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