Buffer Tank Function - Honeywell SDC Service Manual

SDC / DHC
Volume flow
NOTE
Density of medium
Heat capacity
NOTE
Anti-blocking function
7.3.6.2
NOTE
EN2H-0221GE51 R0812
(only if heat balancing is activated)
This set value allows choosing between volume flow computed in
• litres/minute for calculating the flow volume or
• litres/pulse when using the pulse input corresponding to the
respective pumping capacity of the solar loading pump.
With set value 0 L/min., no calculation of heat balancing is
possible.
(only if heat balancing is activated)
This set value defines the fluid density of the heat carrier medium
used according to the manufacturer data.
Specific heat capacity medium (only if heat balancing is activated)
This set value defines the specific heat capacity of the heat carrier
medium used according to the manufacturer data.
The physical values of volume flow, density and specific heat
capacity form the basis for determining the solar heat balancing
and the solar power and are calculated according to the
mathematical relation
W = (V/t) · ρ · cW · Δδ · tSOP
The results can be seen on the information level.
W = Heat balancing
V / t = Volume flow of the heat carrier medium
ρ = Density of the heat carrier medium
cW = Specific heat capacity of the heat carrier medium
Δδ = Temperature differential (collector flow/return)
This is an automatic function of the controller. If the solar loading
pump was switched off longer than 24 hours, it is operated for
approx. 20 seconds to prevent blocking via corrosion.

Buffer tank function

This function is only active if a buffer loading pump is assigned to
a programmable switching output or if a buffer sensor has been
connected to a variable input.
Hydraulic Components
201