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Aquarea air/water heat pump – Installation manual for monobloc and split systems C, D and E series 05 / 2014
8
Electrical
ins
tallation
Electrical installation
Inputs and outputs (external interfaces)
Terminals
Connection
Function
Comments
Number
Cable
22 to 23
Solar pump
station
Input of the ON signal
from solar pump 2 (230 V AC)
Use additional circuit board CZ-NS1P, CZ-NS2P
or CZ-NS3P
2
19 to 21
Solar 3-way
directional valve
Output for triggering
the solar 3-way directional
valve
Connect the 3-way directional valve
so that it prevents flow through the
solar circuit and heat exchanger of
the hot-water tank when closed .
3
17 to 18
Ext . control sig-
nal
Input for external control sig-
nal, volt-free, normally closed
These two terminals are jumpered
on delivery . Connection:
1-pin (min . 3 mm contact clearance)
When the contacts are open, the device is switched
off and the remote control is disabled .
The jumper between terminal 17 and 18 must be
removed, if the external control device (optional) is
connected to the hydro module . The max . operating
current of the control device must be less than 3 A
ms
.
2
15 to 16
Temperature
sensor for hot-
water tank
Input for temperature sensor
of the hot-water tank
Use an NTC sensor
2
13 to 14
Temperature
limit switch for
hot-water tank
Input for temperature limit
switch of the hot-water tank
Terminals 13 / 14 must be jumpered if no temperature
limit switch is used for the hot-water tank
2
9 to 12
Room
thermostat
Input for external room
thermostat
For exclusive control of heating
mode via the external room thermo-
stat, only phases L and L1 are con-
nected to the terminal strip .
This also applies for devices without a cooling
function . This connections do not permit switching
between heating and cooling mode .
4
Mass
to 8
Electric immer-
sion heater for
hot-water tank
230 V output for activating /
deactivating the electric im-
mersion heater for hot-water
storage tanks
The maximum output capacity of the electric immer-
sion heater for hot-water storage tanks should not
exceed 3 kW
3
4 to 6
3-way directional
valve
230 V output for control of the
3-way directional valve (e .g .
for heating, hot-water tank)
3
1 to 3
2-way directional
valve
230 V output for controlling
the 2-way directional valve
(e .g . for floor heating, cooling)
Connection on automatic deactivation
of heating circuits in cooling mode
via a 2-way directional valve
Top: Motorised 2-way directional valve
Bottom: Spring-loaded 2-way
directional valve, normally open
3
Terminal strip and table of inputs and outputs with functions
Condition
L/L1
L/L 2
Room temperature >
Target temperature
Circuit open
(heating off)
Circuit closed
(cooling on)
Room temperature <
Target temperature
Circuit closed
(heating on)
Circuit open
(cooling off)
Operating mode
heat pump
Heating
Cooling
CLOSE
OPEN
N
M
1
23
CLOSE
OPEN
N
M
1
23
9
10
11
12
COOL
L2
L1
HEAT
N
L
17
18
19
20
21
22
23
CLOSE
OPEN
N
M
OPEN (AB -> A)
CLOSE (AB -> B)
N
M
4
56
A
AB
B
Hot-water tank
Heating circuit
