Honeywell EN2H-0221GE51 R0808 service manual Kspf B, Hydraulic buffer relief HBR

SDC / DHC Hydraulic Components

7.3.8Hydraulic buffer relief (HBR)

1

PF

KSPF B

AABHPEM

1 Buffer tank

Function Using a 3-way switching valve (output active), hydraulic buffer relief (HBR) causes temporary intake into the upper region of the buffer tank, if that region has not reached its setpoint temperature yet, so that connected heating or hot water circuits receive priority supply of energy.

When the buffer temperature exceeds the buffer setpoint by 2.5 K, the 3-way switching valve is hydraulically coupled to the lower region of the buffer tank so that the entire buffer tank can be loaded. Another switch-over to the upper region of the buffer tank is initiated as soon as the buffer temperature undershoots the buffer setpoint temperature by 2.5 K.

Application Partial buffer loading with priority supply for heating and hot water for all types of loading control modes (see buffer control modes 1, 2 and 5)

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