RHOSS ELECTA Series, Инструкция по эксплуатации, Страница: 78 / 344

The control system of the DC-INVERTER heat pump normally modulates
the ability of the compressor, based on the heat capacity request. If there
is a need to reduce the maximum value of: ability, electric and/or noise
absorption of the compressor, e.g. in night-time operation, it is possible
to activate the "Night Mode" function using the relative external contact
(clamps 9-10 of TERMINAL BLOCK), with CLOSED CIRCUIT the maxi-
mum frequency will be decreased to the value of Parameter
102 .
Limitation active in calling for hot water.
The heat pump normally regulates the water outlet temperature based on
the operation mode and relative climatic curve for radiant terminals (Set
point 1), in this way the environmental comfort is obtained by using water
at the temperature directly produced inside the same, optimising effective-
ness of the ELECTA and relative electric energy consumptions.
When having to power air terminal units, it is possible to activate a se-
cond level (SET POINT-2 ) of the water delivery temperature, this acti-
vation happens through closing of the contact (clamps 13-14 TERMINAL
BLOCK) “Set –Point 2”. A closed contact the unit will work according to the
“Set Point 2 climatic curves”
Logic of the climatic curves
The logic regulating the temperature of the requested water to the Heat
Pump, in normal winter heating or summer cooling operation, is based on
the climatic curves.
The basic logic is that to modulate the temperature of the requested water,
depending on the temperature of the external environment.
Winter climatic curve
The Winter climatic curve is built by setting the following parameters:
- 210: Minimum external winter temperature (default - 5°C)
- 211: Maximum external winter temperature (default 20°C)
- 212: Minimum winter outlet water temperature (default 22°C)
- 213: Maximum winter outlet water temperature (default 45°C)
213
212
T. Out
Water
210 211
T.Outdoor
Fig. 1: Determination of
the temperature of the
requested water, accor-
ding to the Winter clima-
tic curve.
The temperature of the requested water is calculated according to the
temperature of the external environment
(Par 108) .
Therefore, according to this logic, if the external temperature is very low,
high temperature water is requested, whereas if the external temperature
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Summer climatic curve
The Summer climatic curve is built by setting the following parameters:
- 217 : Minimum external summer temperature (default 23°C)
- 218 : Maximum external summer temperature (default 32°C)
- 219 : Minimum summer outlet water temperature (default 15°C)
- 220 : Maximum summer outlet water temperature (default 22°C)
220
219
T. Out
Water
217
218
T.Outdoor
7.4 LIMIT OF FREQUENCY "NIGHT MODE"
7.5 SET POINT 2 ACTIVATION
7.6 LOGIC OF THE CLIMATIC CURVES
Fig. 2: Determination of
the temperature of the re-
quested water, according
to the Summer climatic
curve.
The temperature of the requested water is calculated according to
the temperature of the external environment
(parameter 108) . The-
refore, according to this logic, if the external temperature is very high,
low temperature water is requested, whereas if the external tempera-
WXUHLVFRROHUZDWHUDWDKLJKHUWHPSHUDWXUHLVVXI¿FLHQW
If the system has only terminal radiant always open contact 13-14 (point
1). If the system has only terminal fan coil contact 13-14 closed at all times
(Setpoint 2). If the system has radiant terminals and terminal fan coil ther-
mostat of zoa fan coil closes the contact 13-14 (Setpoint 2).
NOTE: The parameters 214 and 221 can also introduce a dynamic com-
pensation on the climate curves. For this type of operation it is necessary
to contact the authorized service center.
Set point 2 climatic curves (to power the fan coils)
If the second set point is activated, via the closing of the "Set-point
2" contact (terminals 13 - 14 TERMINAL BLOCK,, the temperature
of the requested water from the heat pump is calculated through a
further two climatic curves, a winter one and a summer one. These
climatic curves are built on the same external temperatures, mini-
mum and maximum, set for the previous curves
(parameters 210,
211, 217, 218) .
Whereas, the water temperatures are settable on the following pa-
rameters:
For the winter climatic curve:
- 215: Minimum outlet water temperature (default 45°C)
- 216: Maximum outlet water temperature (default 45°C)
For the summer climatic curve:
- 222:
Minimum outlet water temperature (default 7 °C)
- 223: Maximum outlet water temperature (default 7°C)
78
Section I :: User EN