Advanced Tank Loading Commercial Hot Water System - Bosch GWH 715 ES Applications Manual

Tankless and point-of-use water heaters applications manual
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Bosch applications manual
11.3 Advanced tank loading commercial hot water
system
The following application outlines an advanced tank loading
application for commercial hot water systems (e.g. hotels, fi tness
centers). This design allows for complete isolation of the system for
maintenance reasons and gives the ability to bypass certain system
components in case of failure. A second hot water storage tank is
shown for additional hot water supply and back up in case of tank
failure.
System parameters:
See Chapter 5.1 and 5.2 for pump parameters
hot
Thermostatic
mixing
valve
Note:
Drawing is not to scale.
BOSCH THERMOTECHNOLOGY CORPORATION
Bosch GWH 715 ES, Bosch GWH C 800 ES, or Bosch GWH C 920 ES/ESC
cold
hot
cold
Symbols
Service
Tankless
valves
link
Aquastat / Water Heater setpoints
Model Number
Aquastat setpoint
GWH C 920 ESC
≤140°F
GWH C 920 ES
≤126°F*
GWH 715 ES
≤126°F*
GWH C 800 ES
≤126°F*
* If local codes require higher setpoint or to increase the recovery
capacity of the water heater, contact Bosch Thermotechnology.
hot
cold
hot
Pressure
Flow
relief
direction
valve
Water heater
setpoint
14°F above
Aquastat setpoint
140°F
140°F
140°F
cold supply
cold
Circulator
Bosch applications manual | 06.2009
| 33
DHW

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