Solar parallel operation

SDC / DHC	Hydraulic Components

Solar tank maximum If the temperature in the solar tank (hot-water tank or buffer tank)

temperature limit exceeds the set value, an active forced switch-on of the solar loading pump (see description for collector maximum temperature limit) is interrupted. This forced switch-on is enabled again as soon as the solar tank temperature falls more than 10 K below its set limit.

Solar control mode This function defines the solar loading mode.

Solar priority mode (disabling of heat generator)

During solar loading, all demand for the heat generator is suppressed.

During solar loading, demand for the heat generator is permitted.

Solar priority mode - hot water (setpoint control)

During solar loading, demand for the hot-water control at the heat generator is suppressed.

Solar priority mode - buffer (setpoint control):

During solar loading, demand for the buffer control at the heat generator is suppressed.

Heat generator cycle Heat generator cycle disable (only with solar control mode = disable priority mode)

The cycle disable serves to prevent frequent switching between solar loading and loading by the heat generator. After a solar loading pump switch-off, the set time has to pass before the solar buffer tank can be loaded again by the heat generator (boiler).

EN2H-0221GE51 R0808

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EN2H-0221GE51 R0808 specifications

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Honeywell EN2H-0221GE51 R0808 service manual Solar priority mode disabling of heat generator

Models: EN2H-0221GE51 R0808

SDC / DHC

Solar priority mode (disabling of heat generator)