emmeti EH0618DC, Installation And Use Manual

Page: 92 / 108

92
1. DESCRIZIONE DEI COMPONENTI
GB GB
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 envi-
ronment.
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
210
211
220
219
Temp.
water
217
218
Temp.
Outdoor
Temp.
water
Temp.
Outdorr
Fig. 1: Determination of the
temperature of the requested
water, according to the Winter
climatic curve.
The temperature of the requested water is calculated according to the tem-
perature 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
is mild, water at lower temperature is sufficient.
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)
213
212
210
211
220
219
Temp.
water
217
218
Temp.
Outdoor
Temp.
water
Temp.
Outdorr
8.6 Logic of the climatic curves
Fig. 2: Determination of the tempera-
ture of the requested water, according
to the Summer climatic curve.
The temperature of the requested water is calculated according to the tem-
perature of the external environment
(parameter 108)
. Therefore, accord-
ing to this logic, if the external temperature is very high, low temperature
water is requested, whereas if the external temperature is cooler, water at
a higher temperature is sufficient.
8. OPERATING LOGICS
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 PCB 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, minimum and maximum, set for
the previous curves
(parameters 210, 211, 217, 218).
Whereas, the water temperatures are settable on the following param-
eters:
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)
8.7 Inverter frequency modulation
The output signal from the SMART-MT controlling the inverter frequency,
is based on the error between:
- temperature of the requested water from the heat pump (parameter
231
):
• in air conditioning, it is calculated according to the active climatic curve
• in DHW production, it is set through parameter
128
.
- temperature of the delivery water from the heat pump (parameter
109
).
Note:
The output signal from the SMART-MT
parameter 235
represents the
requested inverter frequency; the power supply frequency of the compres-
sor is further controlled by the PCB-MAIN of the heat pump, according to
compressor operational limits.
G
N
8.8 Dehumidifier Management
A dehumidifier can be activated to control the room humidity.
Then it is possible to start the same through a relay connected between
the terminal G of the TERMINAL BLOCK PCB and the neutral N of the
terminal board. Also the activation of the heat pump in cooling mode
can be set.
Dehumidifier activation occurs only in cooling modes in the following
cases:
- Closing of the IN and COM contacts (humidistat connection).
- If the CRONO-TH is installed, when the relative humidity detected
by the sensor placed inside it is greater than the Set set (parameter
119 ) the differential (parameter 120 )
Deumidifier
A
1
2
3
4
5
6
Temp. Water
Supply System
Outdoor
Temp.
Sanitary Tank
Water Sensor
IN
COM
12V
7
8
9
Dew Point
Sensor
Remote
On/Off
10
11
Night
Mode
12
Remote
Cool/Heat
13
14
+
Set Point 2
-
Out Signal
0-10V
26
27
Power Supply
24V 3VA
C
D
E
Room
Thermostat
Elec. heat
Sanitary
Pump 1
L
K
J
F
Input
Pump1-2
Ext. Heat
Source
L
I
Out Pump 2
H
G
3W. V. Sanitary
Dehumidifier
-
+
G
12V
Sig.
GND
LAN
RS485
Low Temp.
Valve
Gray Y
Black G0
Red G
1 KOhm
CRONO-TH
Valvola 3 vie sanitaria
Pump 2
Deumidificatore
Consenso Caldaia
Riscaldatore elettrico ACS supplementare
Termostato ACS
Flussostato
ON-OFF
Valvola elettrica
impianto ambiente 1
Attenuazione notturna
Estate inverno
Set point 2