DISINFECT
sets whether or not the DHW pump operates during the DHW tank disinfection operation.
PUMP RUNNING TIME
sets the length of time the pump runs for at each of the user-specified start times on the
DHW
PUMP
tab on the
DOMESTIC HOT WATER (DHW)
menu, if
TIMER RUNNING
is enabled.
7.5
COOL MODE SETTING Menu
MENU
>
FOR SERVICEMAN
>
COOL MODE SETTING
In
COOL MODE SETTING
the following parameters should be
set.
COOL MODE
enables or disables cooling mode. For
installations with space cooling terminals, select
YES
to enable
cooling mode. For installations without space cooling terminals,
select
NON
to disable cooling mode.
T1S RANGE
selects the heat pump leaving water set temperature range that is available to the user for cooling mode on
the user interface main screen.
LOW
or
HIGH
should be selected to suit the type of space cooling terminals installed.
When
LOW
is selected, the minimum set temperature is 5°C. If the climate-related curve function is selected, the curve
selected is the low temperature curve. When
HIGH
is selected, the minimum set temperature is 18°C. If the
climate-related curve function is selected, the curve selected is the high temperature curve. Climate-related curves refer to
M-Thermal Engineering Data Book, Part 3, 8.1 “Environment Temperature Curves”.
T4CMAX
sets the ambient temperature above which the heat pump will
not operate in cooling mode. For HTW-V5(7,9)W/D2N8, the highest value that
T4CMAX
can take is 43°C. For HTW-V12(16)W/D2N8, the highest value that
T4CMAX
can take is 46°C.
T4CMAX
is the cooling mode upper ambient
temperature operating limit of the heat pump. Refer to Figure 3-7.16.
T4CMIN
sets the ambient temperature below which the heat pump will not operate
in cooling mode. The lowest value that
T4CMIN
can take is -5°C, which is the cooling mode lower ambient temperature
operating limit of the heat pump. Refer to Figure 3-7.16.
dT1SC
sets the minimum temperature difference between the heat pump leaving
water temperature (T1) and the heat pump leaving water set temperature (T1S)
at which the heat pump provides chilled water to the space cooling terminals.
When T1 – T1S ≥ dT1SC the heat pump provides chilled water to the space
cooling terminals and when T1 ≤ T1S the heat pump does not provide chilled
water to the space cooling terminals.
dTSC
sets the temperature difference between the actual room temperature (Ta)
and set room temperature (TS) above which the heat pump provides chilled
water to the space cooling terminals. When Ta – TS ≥ dTSC the heat pump
provides chilled water to the space cooling terminals and when Ta ≤ TS the heat
pump does not provide chilled water to the space cooling terminals. Refer to
Figure 3-7.18.
dTSC
is only applicable if
YES
is selected for
ROOM TEMP
in the
TEMP. TYPE SETTING
menu. Refer to Part 3,
7.8 “TEMP. TYPE SETTING Menu”.
Figure 3-7.15:
COOL MODE SETTING
menu
Figure 3-7.16: T4CMAX, T4CMIN
Abreviations:
T4: Outdoor ambient temperature
Figure 3-7.17: dT1SC
Abreviations:
T1: Heat pump leaving water temperature
T1S: Heat pump leaving water set temperature
Figure 3-7.18: dTSC
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