Hitachi RAS-H(V)RNME-AF Service Manual page 164

5 Control system
DHW second cycle wait time
This defines the minimum time between two consecutive domestic hot water heat pump cycles.
Sanitary Water will not start if:
- Sanitary Water Off Time <
Heater Start-Up by T (High Demand Differential) is not limited by this function.
DHWON
Sanitary Water start-up by T
at all by means of this function when timer has not passed.
Sanitary Water Off Time starts being counted after last Sanitary Water Heat Pump operation.
CODE REF
3-028 C Cycle DHW time
DHW
Hot water
1
request
0
1
DHW operation
0
3-026
DHW electric heater wait time
If Heat Pump cannot offer sufficient capacity it will be necessary to start Heater in order to supply additional capacity.
Heater will start if:
- Heat Pump DHW Operation Time > DHW
Heat Pump will not stop if heat pump stoppage conditions are not met. For example, stoppage by T
CODE REF
3-029 DHW EH wait time
EH
1
Hot water
request
0
1
DHW operation
0
1
Heater operation
0
154
SMGB0070 rev. 1 - 08/2011
(3-028)
CDHW
& T is limited and therefore the Sanitary Water mode, including heater, will not start
HPON HPOFF
Description
3-027 3-028
(3-029)
EH
Description
3-029
Default Value Range
1 0~24
Default Value Range
45 0~60
Steps Units
1 hour
Request
No request
ON
OFF
Time
control or T .
DHWMAX HPOFF
Steps Units
1 min
Request
No request
ON
OFF
ON
OFF
Time