Solahart Streamline 270, Руководство пользователя и инструкции по установке

Страница: 32 / 60

INSTALLATION – SOLAR STORAGE TANK
32
CIRCULATED HOT WATER FLOW AND RETURN SYSTEM
The solar storage tank of a solar water heater should not be installed as part of a circulated hot water flow and
return system in a building. The benefits of solar gain will be significantly reduced.
In-tank electric boosting
If this solar water heater has its electric heating unit connected for in-tank boosting and a circulated flow and
return system is required, it is necessary to install a secondary water heater supplied from the solar water
heater. The flow and return lines connect to the secondary water heater, not the solar storage tank. The
secondary water heater makes up for the pipe heat loss in the flow and return system and must be able to
provide a hot water outlet temperature of at least 60°C.
Refer to the diagram
Circulated Hot Water Flow and Return System
– Solar Water Heater with In-tank Boosting
on page 32.
Circulated Hot Water Flow and Return System
– Solar Water Heater with In-tank Boosting
In-series boosting
If this solar water heater does not have its electric heating unit connected for in-tank boosting and is installed
as a solar pre-heater to an in-series booster water heater, then the booster water heater can be used as the
secondary water heater so long as it is able to provide a minimum hot water outlet temperature of at least 60°C
and it is not connected to an Off-Peak or time controlled electricity supply. It is necessary to connect the flow
and return lines to the in-series booster and not to the solar storage tank.
Refer to the diagram
Circulated Hot Water Flow and Return System
– Solar Water Heater with In-series
Boosting on page 33.
If the in-series water heater is a continuous flow water heater, the circulator must be:
•
sized and set to provide a minimum flow rate of 3.0 L/min through the circulated hot water flow and return
system, and
•
either thermostatically and / or timer controlled.
The circulator must not be set to operate continuously, i.e. 24 hours per day.
LEGEND