Plum ZAB-14, Service And Assembly Manual

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the initial stages of heating, when the water getting into the boiler is cold. This causes the boiler
water to flow in a short cycle: boiler (1) – throttle valve (8) - thermostatic valve (7) – pump (6).
The thermostatic valve (7) opens after the temperature returning to the boiler increases,
directing the boiler water to the central heating system. When the temperature measured by
sensor (13) drops below the preset DHW temperature, the DHW pump (12) is enabled. The DHW
pump (12) will be disabled after the DHW tank (11) is filled, i.e. when the temperature on sensor
(13) is equal to the preset DHW temperature.
9.3 Scheme 3
Fig. 24
Diagram with thermostatic three-way valve which protects return water temperature, and
two three-way valves which feed floor heating, as well as with two additional mixer cycles after
connecting an extension module
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, where:1 – boiler, 2 – ZAB-14 regulator, 3 – control panel, 4 – boiler
temperature sensor, 5 – return temperature sensor, 6- central heating cycle pump, 7 – thermostatic three-
way valve (protecting boiler return), 8 – circulating pump, 9 –temperature sensor-weather, 10 – fluid
coupling (eliminates necessity of balancing the pumps’ flows), 11 – domestic hot water temperature sensor,
12 – domestic hot water pump, 13 – mixer servo 1, 14 – mixer pump 1, 15 – external thermostat protecting
floor heating 55 ºC (it cuts off electricity supply for mixer pump after exceeding maximum temperature - the
thermostat is not included in the regulator), 16 –room thermostat of mixer 1, 17 – mixer temperature
sensor 1,18 –mixer servo 2, 19 – mixer pump 2, 20 – external thermostat protecting floor heating 55 ºC,
21 – mixer room thermostat 2, 22 – mixer temperature sensor 2,23 – mixer servo 3, 24 – mixer pump 3,
25 – external thermostat protecting floor heating 55 ºC, 26– room thermostat of mixer 3, 27 – mixer
temperature sensor 3,28 –mixer servo 4, 29 – mixer pump 4, 30 – room thermostat of mixer 4, 31 – mixer
temperature sensor 4, 32 – extension mixer module, 33 – domestic hot water tank.
SUGGESTED SETTINGS:
Parameter Setting MENU
Return protection off service settings -> boiler settings
Mixer support 1 on, floor service settings -> mixer 1 settings
Max. pre-set mixer temp. 1
50  C
service settings -> mixer 1 settings
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The presented hydraulic diagram does not replace the central heating system design and is
provided solely for the purposes of demonstration
!
OPTION – available after connecting additional
extension module