Hydraulic Diagrams; Diagrams 1 - ENGO CONTROLS EWT100 Operation And Installation Manual

4. Hydraulic diagrams

4.1 diagrams 1

Hydraulic diagram with of the four-way valve controlling the central heating circuit or floor circuit (The presented hydraulic diagram does not replace
central heating engineering design and may be used for information purposes only!)
EWT100
Designations:
TP - room thermostat (NO-NC),
T1 - heating circuit temperature sensor type CT10,
T2 - external (weather) temperature sensor CT6-P type,
T3 - return temperature sensor type CT10,
T4 - heat source temperature sensor type CT10,
P - heating circuit pump,
SM - actuator + four-way valve,
1 - heat source with contact (S) ON-OFF (gas or oil boiler)
2 - differential pressure relief valve.
Parameter
Kind of the system
Max. temperature
Room thermostat
Start pump temp.
Return sensor
In order to improve water flow in gravitational circuit of the boiler use large nominal DN crosssections of pipes and the four-way valve,
avoid numerous elbows and cross-section reductions, apply other rules regarding construction of gravitational systems, e.g. keeping
of gradients, etc. In case the return temperature sensor is mounted on the pipe - provide proper heat insulation to isolate it from the
environment and improve its thermal contact with the pipe by applying of the thermal paste. The heat source preset temperature has to
be high enough to ensure enough heating power for the heating circuits while heating the return water.
EWT100 FULL MANUAL
Setting
Radiators system (Underfloor heating)
80ºC (45ºC)
ON
55ºC (20ºC)
ON
8
MENU
Service settings
Kind of the system
—>
Service settings Heating circuit
—>
Service settings Room thermostat
—>
Service settings Heating circuit
—>
Service settings Protection
—>