Booster Applications - Bosch C 1210 ES Applications Manual

THERM Tankless Water Heater Applications Manual

10.2 Booster applications

10.2.1 Solar DHW system with gas tankless water heater booster
The tankless water heater only runs when solar water needs a boost.
The Ariston mini tank provides small amounts of DHW instantly and
increases comfort by buffering DHW temperature. See applicable
models listed in the fi gure below.
Thermostatic valve 1 ensures that warm solar water bypasses the

water heater and directs cooler water through the appliance
when reheating is needed.
Thermostatic valve 2 acts as a tempering valve that brings

potentially hot water temperatures down to a level that is safe for
the inhabitants.
Applicable Bosch Models:
•Bosch 830 ES
•Bosch 940 ES/ESO
•Bosch C 1050 ES
•Bosch C 1210 ES/ESC
Ariston GL8ti
mini tank
Honeywell
Well
Am-1 series
thermometer
thermostatic
mixing
valve
BOSCH THERMOTECHNOLOGY CORPORATION
Hot Cold
Thermostatic
valve 1
Thermostatic
Domestic
valve 2
hot water
Water
supply
Pressure
Service
relief
valve
valve
System parameters:
Honeywell AM101 Thermostatic Valves required for proper

operation;
Remove check valves from Thermostatic Valve 1 as it is used as a

diverter valve;
Thermostatic Valve 2 is a tempering valve;

Recommended setpoint 120°F for both Valves;

Set tankless water heater temperature to

140° F
Ariston mini tank will provide increased

temperature stability and quicker hot water
delivery. (recommended but not required)
Solar
Controller
Tank
sensor
Symbols
Solar
Expansion
storage
tank
tank
Collector
sensor
Solar
Pump
Station
Flow
Drain
Circulator
direction valve
Data subject to change without notice | 01.2011
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