FIRŠT-ROTOTEHNIKA, s.p., Radegunda 54, SI-3330 Mozirje, Slovenija
tel. +386 3 898 35 00, fax. +386 3 898 35 35, e-mail: [email protected], http://www.rototehnika-sp.si
4
DTC 200
TERMINAL CONNECTION
1,2
sensorT1 – heating source (collector, boiler, …)
2,3
sensor T2 – hot water tank
11
N – not in use
12
L - not in use
13
N - neutral
14
L - phase - pump 6(1)A, 250V , 50Hz
15
L – phase mains 230V , 50Hz
16
N – neutral mains 230V , 50Hz
1.5 EXAMPLES OF USE
example: 1
Heating sanitary water with solar collectors.
6(1)A, 250V
Grounding wires should
be connected to special
terminal pins situated on
left side of terminal strips.
The thermostat is
designed for fixed
installation. When per-
forming electric installa-
tion, an element should be
inserted which enables at
least 3 mm separation of
thermostat from the mains
(switch or socket). Prior to
each intervention in the
thermostat, first disconnect
it from the mains.
ELECTRIC CONNECTION
Before each intervention in the thermostat first discon-
nect the main power!
DTC 200/ (2 sensors)
1. Heating the domestic hot water from one heating source
(solar collectors, boilers, heat pump...) .
1.1 Basic
Differential thermostat controls the electric motor actuated ball
valve (EMV 110..) and the circulation pump.
The thermostat enables setting of two parameters:
1. Regulation of maximum temperature in hot water tank from
10° to 90°C.
This temperature is defined by T2 sensor witch is generally
mounted in upper third of heat exchanger.
2. Regulation of difference for exchanger from 0K to 15K.
With these regulation you define how much the value of the
source temperature (collector, boiler,...) should exceed the tem-
perature of water around the exchanger in hot water tank, that
the thermostat opens the valve and activates the pump.
The difference is set in relation to the volume of heat losses of
the system which depend on lengths of pipelines from source
to hot water tank and on pipeline insulation.
SENSORS INSTALLATION
T1 AND T3 SENSORS INSTALLATION IN TO SOLAR
COLLECTOR OR BOILER:
Use KF sensors with silicon cable insulation (RED
colour)!
Install it as immersion sensor in collecting pipe at the top of the
collectors or boiler in provided sleeve. Connect sensors on the
terminals 1 and 2. Use sensors KF with red silicon cable and
use cable type J-Y (St) 1X 2X0,6 for connection.
For cables longer than 15m we recommend over-voltage pro-
tection with VDR resistor. For over voltage protection is recom-
mended use of armoured cable and it must be earthed.
flow direction
T-piece 1/2”
pipe1/2”
VDR resistor thermo-shrinkable
tubes
sensor kable
extension cable
T2 AND T4 SENSORS INSTALLATION IN DOMESTIC HOT WA-
TER TANK (DHWT):
Use BSF1 sensors with PVC cable insulation (GRAY
colour)!
Install T2 sensor to provided place in hot water tank or on hot water
tank wall under isolation as contact sensor in upper part of ex-
changer. When sensor is mounted as contact one we recommend
to coat it with heat conducting paste or liquid metal. Use sensors
BSF1 with PVC cable.
In special purpose vertical or horizontal
tube (sensor should be protected against
accidental extraction).
On hot water tank with clip, wire and
spring strip (use paste for better heat
transmission).
WARNING!
At mounting protect sensors against ambient influence and
assure suitabile mechanical protection.
1.2 Operation
DTC 200 works as single differential thermostat, which mea-
sures the temperature of heating source (collectors, boiler, ...)
and in user (hot water tank).
Heating effect is provided, when heating source temperature is
higher than the temperature of the user (water in hot water
tank). Consequently minimum difference should be 3K-5K. Rec-
ommendable minimal value is 5K.
When the temperature of the source exceeds the temperature
around the user for pre-set difference opens the electric motor
actuated ball valve and switches the pump.
The thermostat switches off the pump if pre-set temperature is
reached in hot water tank (adjustable from 10° to 90°C).