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Applications manual | 11.2007Bosch Water Heating
Applications manual
| 25
3.2.4 Bosch ProTankless gas water heater with domestic
recirculation loop
The circulator should be controlled by an external aquastat, or with
a timer to run only during times of expected hot water usage.
Symbols
Sink
Note: This drawing is conceptual in nature and does not address all design, installation or safety considerations.
Additional safety and/or auxiliary equipment may be needed. This diagram is for reference use by officials, designers and licensed installers.
It is expected that installers have adequate knowledge of accepted industry practices for the equipment, procedures, and applications involved.
Drawing is not to scale.
Drawing # WH2R
CN rev 06/07
Service
valves
Standard
tub
fixture
Bronze circulator sized
according to UPC standards
(Taco Bronze 007 or Grundfos 15-42B
will cover most homes up to 3 bathrooms)
Potable water
expansion tank
Flow
check
valve
Ariston Pro GL4Ti
(for pipe runs over
100ft use GL8Ti)
Bosch GWH 715 ES,
Bosch GWH C 800 ES,
Bosch GWH 425 HN or
Bosch GWH 425 PN
Timer or
Aquastat
Flow direction
Hot
Cold
Note: Cold water piping to fixtures not shown for clarity purposes.
Pressure
relief
valve