Residential Solar Applications; Tankloading - Bosch GWH 715 ES Applications Manual
Tankless and point-of-use water heaters applications manual
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Also See for GWH 715 ES:
- Instruction manual (65 pages) ,
- User manual (20 pages) ,
- Installation manual (8 pages)
Table of Contents
2 6 |
9 Residential Solar Applications
Introduction
This section gives a general overview of tank loading and in line
booster applications for domestic hot water in conjuction with solar
water heating. For additional system details, consult the Bosch
Solar Technical Guide.
9.1 Tank loading
9.1.1 Solar DHW system with gas tankless water heater tank
loading
In this system the gas tankless water heater keeps the comfort zone
at top of tank at desired temperature.
Use GWH 715 ES, GWH C 800 ES, or GWH C 920 ES with
aquastat that activates circulator.
Timer recommended to interrupt reheating during night time.
Solar
Controller
Honeywell
Well
Am-1 series
thermometer
thermostatic
mixing
valve
Bosch applications manual | 06.2009
Collector
sensor
Twin
tube
Solar
Pump
Station
Tank
sensor
Symbols
Pressure
Solar
Service
relief
storage
valve
valve
tank
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.
See Chapter 5.2 for tank loading pump parameters
Bosch GWH 715 ES,
Bosch GWH C 800 ES,
Bosch GWH C 920 ES/ESC
Domestic
Hot
Water
Thermostatic valve
Setpoint 120°F
Aquastat
or tank sensor
Potable
Flow
water
direction
expansion
tank
Bosch applications manual
Water heater
setpoint
14°F above
Aquastat setpoint
140°F
140°F
140°F
Expansion
Drain
Circulator
tank
valve
BOSCH THERMOTECHNOLOGY CORPORATION
Cold
Water
Supply
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