EAS Electric ETH-80VM, Installation & Owner'S Manual

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40
About DHW mode
DHW
：
domestic hot water
DHW control
DHW MODE SETTING typically consists of the following:
1. DHW MODE: enable or disable the DHW mode
2. TANK HEATER: set whether the booster heater is available or not
3. DISINFECT
：
set the parameters for disinfection
4. DHW PRIORITY
：
set the priority between domestic hot water
heating and space operation
5 DHW PUMP: set the parameters for DHW pump operation. The
functions above apply only to installations with a domestic hot
water tank.
How to set the DHW mode
To determine whether the DHW mode is effective.
Go to MENU> FOR SERVICEMAN> DHW MODE SETTING. Press
OK. The following page is displayed:
T5S
T5
T5S-dT5_ON
Compressor OFF
ON OFF
t
2 If tank heater (booster heater) is avaliable, Go to FOR SERVICEMAN
>DHW MODE SETTING>1.2 TANK HEATER and select “Yes”, when
“OK” pressed, the following page will appear:
Use ◄ ►and ▼▲ to scroll and adjust parameters. Use BACK to exit.
dT5_ON is the temperature difference for starting the heat pump,
the picture below illustrates the dT5_ON function.
T4DHWMAX is the maximum ambient temperature that the heat
pump can operate at for domestic water heating. The unit will not
operate if the ambient temperature goes above it in DHW mode.
T4DHWMIN is the minimum ambient temperature that the heat
pump can operate for domestic water heating. The heat pump will
turn off if the ambient temperature drops below it in water heating
mode. The relationship between operation of the unit and ambient
temperature can be illustrated in the picture below:
T_INTERVAL_DHW is the start time interval of the compressor in
DHW mode. When the compressor stops running, the next time the
compressor turns on it should be T_INTERVAL_DHW plus one
minute later at least.
Use ◄ ► and ▼▲ to scroll and adjust parameters. Use
BACK to exit.
dT5_TBH_OFF is the temperature difference between T5 and T5S
that turns the booster heater off. The booster heater will turn off
(T5≥T5S+dT_TBH_OFF) when the heat pump malfunctions.
T4_TBH_ON is the temperature only when the ambient temperature
is lower than its parameter and the booster heater will be available.
t_TBH_DELAY is the time that the compressor has run before
starting the booster heater (if T5
＜
min (T5S,T5stop)).
The operation of the unit during DHW mode described in the
picture below:
In the picture, T5stop is a parameter related to ambient temperature,
which cannot be changed in the user interface. When T5≥T5stop,
the heat pump will turn off.
Note: the booster heater and backup heater can’t operate
simultaneously, if the booster heater has been on, the backup
heater will be off.
If the booster heater is unavailable (1.2 TANK HEATER NON is
selected), the dT5_ON cannot be adjusted and is fixed at 2.
3. To enable disinfect function,Go to MENU> FOR SERVICEMAN>
DHW MODE SETTING>1.3 DISINFECT and select “YES”, when “OK”
pressed, the following page will appear.
COMP.
min(T5S,T5stop)-dT5_on
t_TBH_delay
TBH
T5stop
T5S
T5
Time
OFF
ON
OFF
ON
OFF
T5S+dT5_TBH_OFF
1. Go to MENU> FOR SERVICEMAN>DHW MODE SETTING>1.1
DHW MODE
1 DHW MODE SETTING
1.2. TANK HEATER
1.3. DISINFECT
1.4. DHW PRIORITY
1.5. DHW PUMP
1.1. DHW MODE
SCROLL ENTER
OK
YES
YES
YES
YES
YES NON
NON
NON
NON
NON
1.1 DHW MODE
dT5_ON
dT1S5
T4DHWMAX
T4DHWMIN
t_INTERVAL_DHW
5 °C
10°C
43°C
-10°C
5 MIN
SCROLL
1.2 TANK HEATER
dT5 TBH OFF
T4_TBH_ON
t_TBH_DELAY
5
°C
20°C
90 MIN
SCROLL
1.3 DISINFECT
T5S_DI
t_DI_HIGHTMEP.
t_DI_MAX
5 °C
30 MIN
120 MIN
SCROLL
T5S is the target temperature for domestic hot water. T5 is the actual
temperature of domestic hot water. When T5 drops to a certain
temperature (T5≤T5S-dT5_ON) the heat pump will be available.
dT1S5 is the correct value for the target outlet water temperature
(T1S=T5+dT1S5).
Heat by TBH or AHS
Heat by heat pump
T4
OFF
T4DHWMAX T4DHWMIN
Use ◄ ► to scroll and OK for enter. When the cursor is on
YES, Press OK to set the DHW MODE as effective.
When the cursor is on NON,press OK to set the DHW MODE
as ineffective.
V.2