Hitachi RWM-(H)FSN3E, Service Manual

Page: 141 / 424

5 Control system
SMGB0070 rev. 1 - 08/2011
131
5
Fixed water temperature setting
OTC has no effect on this setting. The user will select a fixed water outlet temperature between 5ºC and 21ºC using the
user interface (LCD Controller).
TF
n
Outlet temperature set-point ºC
Outdoor ambient temperature (ºC)
Where:
TF
n
: Fixed water temperature setting.
n: heating circuit number (n= 1 or 2).
CODE REF Description Default Value Range Steps Units
CIRCUIT 1 (Direct circuit)
3-018 TF1 Fixed Tº C1 19 (3-020)~ (3019) 1 ºC
CIRCUIT 2 (Mixed circuit)
3-118 TF2 Fixed Tº C2 19 (3-120)~ (3119) 1 ºC
N O T E S
• Default values are same for both circuits in order to prevent low temperature in the Refreshing floor circuit.
• Parameters (3-0(1)20)~(30(1)19) are defined by Maximum and minimum water outlet temperature selected by
installer (See bellow).
C A U T I O N
• It is the installer’s responsibility to make sure no unwanted situation occurs (for example: water temperature
setting too low into floor refreshing).
• Be aware that the water set-point for circuit 2 will always be higher than water calculation for circuit 1.