Connecting Weather Sensor (External); Temperature Sensor Checking; Connecting A Room Thermostat; Connecting A Heat Source - ENGO CONTROLS EWT100 Operation And Installation Manual

8.3 Connecting weather sensor (external)

The regulator cooperates only with a weather sensor of the CT6-P type. The
sensor should be installed on the coldest wall of the building, usually this is
the northern wall, under a roof. The sensor should not be exposed to direct
sunlight and rain. The sensor should be fitted at least 2 m above the ground,
far from windows, chimneys and other heat sources which could disturb the
temperature measurement (at least 1,5 m). Connect the sensor using cable of
0,5 mm2 cross-section, up to 25 m long. Polarity of the leads is insignificant.
Connect the other end of the cable to the regulator. Attach the sensor to the
wall using tackbolts. To access the tackbolts holes, unscrew the sensor lid.

8.4 Temperature sensor checking

Temperature sensors CT10, CT6-P can be checked by measuring their resistance in given temperature. In case of big differences between measured
resistance value and values in table below, the sensor should be replaced with a new one.
CT10
Weather temp. [°C]
0
10
20
25
30
40
50
60
70
80
90
100

8.5 Connecting a room thermostat

Room thermostat (No-Nc) connected to the control affects the heating circuit. The thermostat after contact opening reduces the preset temperature
heating circuit about the service value Decrease of thermostat or can turn off the pump in the parameter Off by thermostat. The values of the
parameters must be chosen so that when of working the room thermostat (contact opening) the temperature in the room dropped.

8.6 Connecting a heat source

COM-NO terminals are used to connect the contact heat source (no voltage) that turns on and off the heat source. The heat source can be automatic
boiler gas or oil, which has a contact ON-OFF. Terminals COM-NO does not have galvanic isolation of 230V ~ and can therefore only serve to disconnect
circuit voltage of 230V ~. Use separate relay in the event of having to disconnect circuits at low voltage.
Risk of electric shock caused by current from a heat source. Disconnect the controller and heat source electrical supply and make sure there
is no dangerous voltage on terminals. Protect yourself against incidental generation of supply voltage!
Connection to heat source (gas or oil boiler) should be done by a qualified installer, according to technical data of this boiler.
EWT100 FULL MANUAL
Value [Ω]
32 554
19 872
12 488
10000
8059
5330
3605
2490
1753
1256
915
677
16
Tackbolts holes Tackbolts holes
Cable 2 x 0,5 mm Cable 2 x 0,5 mm 2 2
Max. length 25 m Max. length 25 m
ø 3 - 6,5 mm ø 3 - 6,5 mm
CT6-P (weather)
Weather temp.[°C]
-25
-20
-10
0
25
50
100
125
150
Tackbolts, 2 pcs Tackbolts, 2 pcs
Value[Ω]
901,9
921,6
960,9
1000,0
1097,3
1194,0
1385,0
1479,4
1573,1