KWB Easyfire Installation And Maintenance Manual

© KWB – Kraft und Wärme aus Biomasse GmbH IM Easyfire 10/2008 Page 171
18.2 Hydraulic diagrams
18.2 Hydraulic diagrams
Basic module with weather-sensitive control system
& second boiler switchover
MBEH0005_a sheet 2/2
System description:
The hydraulic system, consists of boiler circuit and distributor and is de-coupled by a switch. The return flow boost
is executed via a thermal valve on at least 50 °C. The basic module for boiler / DHWC & buffer control is equipped
with a weather-sensitive control system for 2 heating circuits (option). One heating circuit is equipped with an
analogue room control unit (option), the second heating circuit is equipped with a digital room control unit (option)
for remote control. Automatic second boiler switchover is activated via plug-in module 1 (option) After heating
up the second boiler, the automatic boiler is switched off via the flue gas thermostat (22) that is only required
for a shared chimney, or via the second boiler sensor (3) at the switchover temperature (65 °C, adjustable). The
second boiler pump is switched on. When exceeding the overheating temperature (80 °C adjustable), the connected
heating circuits run at maximum temperature and the boiler is charged until it reaches the target temperature. If the
second boiler cools off to a temperature below the switchover temperature the automatic boiler goes into operation
again. The second boiler pump switches off.
Menu basic settings
Parameters Settings
Return ow boost Thermal valve
Second boiler Switchover at 65 °C
Overheating at 80 °C
Operation boiler pump O
Network settings Boiler External 2 Heat to target 2
Power output Heating mode
Boiler dependence No
Heating circuit/
heating circuit 0 Room sensor Boiler/0
Outdoor sensor Boiler
Function No
Group no. 0
Heating circuit/
heating circuit 1 Room sensor Boiler/1
Outdoor sensor Boiler
Function Yes
Group no. 0
Heating circuit/
heating circuit 2 Room sensor DRCU 1
Outdoor sensor Boiler
Function Yes
Group no. 0
DHWC/DHWC 0 Function Yes or before
Group no. 0
Buer/Buer0 Function No
Digital remote control/ Outdoor sensor Boiler
Digital remote control1 Heating circuit 1 – 2
DHWC 0 – 0
Buer - - -
Hardware Heating circuit modules 0
Digital remote control 1
Plug-in modules SB
Comment: If the second boiler hydraulics are looped through the automatic boiler, then “Boiler pump mode” must
be set to “On” so that the boiler circuit pump (4) runs together with the second boiler pump.
Subject to change!
Techn. data sheet:HYD-USP-MBEH0005_a, sheet 2/2, date: 13-07-06 StHo
MA-Easyfire 10.2008_EN.indd 171MA-Easyfire 10.2008_EN.indd 171 30.03.2009 13:32:13 Uhr30.03.2009 13:32:13 Uhr

KWB Easyfire Specifications

General

Fuel Type	Wood pellets
Cleaning System	Automatic heat exchanger cleaning
Emission Class	5
Nominal Heat Output	10 kW
Type	Pellet heating system
Ash Removal	Automatic
Heating capacity	10 kW
Hopper capacity	15 kg
Flue diameter	130 mm