Service Manual
12
Cascade system enables possibility to increase maximum power output by parallel connection of several boilers. Cascade
system uses the EKCO.M1 as master boiler and up to 8 Slim boilers as slaves. This system is controlled by one main control panel
with the weather controlling system. All the Slim boiler settings are managed by the master boiler. The heating system temperature is
calculated on the base of outside temperature. The operating power is calculated on the base of flow and return and supply tempe-
ratures.
Boilers should be connected according to Tichelmann schema. By using this schema the flow will be equal and power will
be set to equal. Each of the supply connectors of the boiler should be equipped with the return valve to prevent back flow. On the
return pipe mechanical filter with the magnetic cartridge should be installed. When the system heats more then one heating system
with individual pump boilers should be separated by the hydraulic clutch.
Pictures below show some examples of cascade systems connections.
9. Cascade unit for a heating system with two or more
heating boilers .
Pic. 8 Direct supply boilers heating system and the DHW tank. The wide heating system it may turn out that the internal pumps parameters are too
low. In such conditions please install an external circulating pump PO*. If the thermostat valves are installed on the radiators the bypass pipe
system should included in the pipe system.
Pic. 9 Heating system with separated supply boilers equipped with the hydraulic clutch (SH). Each of the heating system is supplied with the pump
(PO). The master boiler regulates the temperature in up to two heating systems. If more heating systems are supplied that are loaded with
the equal or lower temperature system should be supplied with the independent temperature regulated systems.
CTP - room temperature sensor
ZP – by-pass valve
CTZ – outside temperature sensor
ZT – radiator valve with thermostatic head
TZ – DHW thermostat
ZZ – no-return valvey
NW – expansion vessel
ZR – regulating valve
RW – expansion pipe
ZU – drain valve
PO – circulating pump
ZM – mixing valve
F – filter
ZTD – three-way valve
SH – hydraulic clutch
ZO – deaerate valve
