Bosch GWH C 920 ES - 10 Commercial Solar Applications

Bosch applications manual | 06.2009BOSCH THERMOTECHNOLOGY CORPORATION
Bosch applications manual
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10 Commercial Solar Applications
Introduction
This section provides a general overview for commercial hot water
systems in conjuction with solar water heating (e.g. schools, fi tness
centers). For additional system details, consult the Bosch Solar
Technical Guide.
Domestic
Hot
Water
Solar
Controller
Symbols
Service
valve
Pressure
relief
valve
Honeywell
Am-1 series
thermostatic
mixing
valve
Solar
storage
tank
Flow
direction
Potable
water
expansion
tank
Well
thermometer
Circulator
Thermostatic valve
Setpoint 120°F
Collector
sensor
Aquastat
or tank sensor
Drain
valve
Twin
tube
Expansion
tank
Cold
Water
Supply
Aquastat
or tank sensor
DHW
recirculation
pump
Hot water
recirculation
return line
Solar
Pump
Station
Flow
check
valve
System parameters:
 Honeywell AM101 Thermostatic Valves required for proper
operation.
 For optimal performance, the fl ow through the water heater
should be between 3.5 -5 gpm
See Chapter 5.1 and 5.2 for recirculation pump parameters