
18
N
L
AC220V
L Hf Mf Lf
Fan
V1
V2 N
Valve
Heating
Valve
Cooling
N
L
AC220V
L Hf Mf Lf
Fan
V1 V2 N
Valve
N
L
AC220V
L Hf Mf Lf
Fan
V1
V2 N
Valve
Valve
Auxiliary
electric
heater
Normally
closed
valve
Two-pipe h Auxiliary electric heater
Two-pipe c Auxiliary electric heater
Two-pipe cooling and h Auxiliary
electric heater (Networked)
Two-pipe cooling/cooling and
heating (Networked)
Normally
open valve
Four-pipe(Networked)
(1