Hitachi RWM-(H)FSN3E, Service Manual

Page: 136 / 424

5 Control system
SMGB0070 rev. 1 - 08/2011
126
Selection of heating circuit minimum/maximum temperature limits by Installer
The installer will limit the Space Heating Temperature Set-point in order to prevent excessively high or low temperatures
in the space heating.
Tmaxh
n
Tminh
n
Maximum water temperature
Minimum water temperature
Outdoor ambient temperature (ºC)
Water outlet temperature set-point ºC
Temperature Limit values:
CODE REF Description Default Value Range Steps Units
CIRCUIT 1 (Direct circuit)
3-011 Tmaxh
1
Maximum supply Tº 60 35~60 (*)(**) 1 ºC
3-012 Tminh
1
Minimum supply Tº 20 20~34 1 ºC
CIRCUIT 2 (Mixed circuit)
3-111 Tmaxh
2
Maximum supply Tº 60 35~60 (*)(**) 1 ºC
3-112 Tminh
2
Minimum supply Tº 20 20~34 1 ºC
N O T E
(*) 55ºC for RWM-2.0FNS3E
(**) 80ºC when boiler combination
C A U T I O N
Temperature limits have priority over all other temperature set-point modifications (Room Thermos -
tat, User Selection, etc.), and maximum water temp is limited by unit’s operational range.
Note that water temperature can reach up to 5ºC higher than maximum water temperature by installer
before Thermo OFF condition.
Try to set a minimum of 2 degrees difference between setting temperature (3-(0/1)04) and maximum
supply temperature by installer.