Hitachi YUTAKI Series - Bi-Valent Systems - Parallel Operation (CONF3)

79
Systemconguration,settingsandcontrolsystem
SMGB0066 rev.0 - 12/2009
Controller pack
Service Manual
4
 
Mono-Energetic System with DHW.
Hydraulic separator or buffer tank.
Secondary pump for heating system.
DHW controlled by separate pump.
Auxiliary DHW electric heater.
CONF=1 Mono-energetic system
P1=2 DHW pump
P2=1 Secondary pump
 

Thisisabivalentsystemwheretheboilerisconguredinparallelwiththeheatpump.Ahydraulicseparatororbuffer
tankhastobeusedtoensureproperhydraulicbalancing.Thissystemisrecommendedforretrot(upgrade)applications
where an existing gas/oil boiler will be retained to provide the full heating requirements on the coldest days of the year

CONF = 3
P1=0,1,2accordingtoDHWsystemtype.
P4 = heating curve according to building and system characteristics.
Itisalsorecommendedtoreviewallparametersettings,andmakemodicationsasrequiredbytheinstallation.
 
Bi-Valent System with DHW.
DHW controlled by diverting valve
Hydraulic separator or buffer tank.
CONF=3 Bi-valent Parallel system
P1=1 DHW valve
 
Bi-Valent System with DHW.
Hydraulic separator or buffer tank.
DHW controlled by separate pump.
CONF=3 Bi-Valent Parallel system
P1=2 DHW pump