E93.1001EN.C Manual CD
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35
13-14
ON/OFF STAT OR OPENTHERM WATER TANK
OPTION 1: an ON/OFF thermostat can be connected. The water heater will use the set/programmed tank tem-
perature when these terminals 13 and 14 are bridged.
OPTION 2: an OpenTherm (OT) controller can be connected to the terminals 13 and 14. The water heater soft-
ware will detect and use this OpenTherm signal automatically.
15-16
0-10 VDC CONTROL SIGNAL
These terminals are used for an external 0-10 VDC control signal. PARAMETER: A parameter change is needed.
NOTICE: Terminal 15 [+] (positive) and terminal 16 [-] (negative).
17-18
CASCADE CONNECTION
These connections are used when water heaters are cascaded with the internal cascade manager for controlling
the total cascade. NOTICE: Connect all terminals 17 and all terminals 18 together, do not switch between these
terminals.
19-20
LOCK-OUT OR PUMP ON/OFF
This contact is N.O. (normally open). When the unit is in lock-out this contact will close.
This contact can also be used for the switching of a pump with a separate control input connection.
(PARAMETER: A parameter change is needed).
21-22
BURNER ACTIVE OR EXTRA WATER HEATER OR PUMP ON/OFF
This contact is N.O. (normally open). When the unit starts the burner and detects the flame, this contact will be
closed. This contact can also be used to control an external (extra) water heater. This contact can also be used
for the switching of a pump with a separate control input connection.
(PARAMETER: A parameter change is needed).
23-24
BURNER DEMAND OR PUMP ON/OFF
This contact is N.O. (normally open). When the unit receives any heat demand this contact will close.
This contact can also be used for the switching of a pump with a separate control input connection.
(PARAMETER: A parameter change is needed).
25-26-27
CIRCULATION PUMP P3
Each water heater should be installed with an external pump.
Make use of a relay between this pump and terminal 25-27, when the pump consumes more than 450
Watt.
Pump is switched off, when there is no heat demand, after post running time.
28-29-30-31
DO NOT USE
Do not connect any cable to these connections.
TAKE CARE! 230 V electric voltage on these connections
32-33-34
POWER SUPPLY
The power supply connection of the unit. 32 = phase wire; 33 = ground wire; 34 = neutral wire.
7.4
Sensor values
SENSOR
SENSOR TYPE
SENSOR VALUE
S1
Internal flow sensor
NTC-10K
S2
Internal return sensor
NTC-10K
S3
Tank sensor
NTC-10K
S6
Flue gas sensor
NTC-10K
Conversion table: temperature vs. resistance for all sensors NTC-10k
Temperature
(°C)
Resistance
(Ω)
Temperature
(°C)
Resistance
(
Ω)
Temperature
(°C)
Resistance
(
Ω)
Temperature
(°C)
Resistance
(
Ω)
-30
175203
20
12488
70
1753
120
387
-25
129289
25
10000
75
1481
125
339
-20
96360
30
8059
80
1256
130
298
-15
72502
35
6535
85
1070
135
262
-10
55047
40
5330
90
915
140
232
-5
42158
45
4372
95
786
145
206
0
32555
50
3605
100
677
150
183
5
25339
55
2989
105
586
155
163
10
19873
60
2490
110
508
160
145
15
15699
65
2084
115
443
165
130
