VIGAS 25 Lambda Control - Page 21

Gasifying boiler VIGAS
13.4.2 CONNECTION SCHEMAS WITH EXPANDER AK4000E
21
Schema 4 is designed with 4-way valve controlled manually. Pump works
in pulsating wave depending on the boiler water temperature. T3 contact
on the power board AK4000S is used to connect indoor thermostat.
Schema 3 is designed with 3-way thermostatic valve (recommended
temperature 60 °C) Pump works continuously at temperature over 40 °C.
T3 contact on the power board AK4000S is used to connect indoor
thermostat.
Schema 5
with one controlled heating circuit of central heating – floor or radiator
heating. Temperature of domestic water according to external temperature,
indoor thermostat or combination. Separately controlled boiler pump and central
heating pump. Controlled by 4 - way convertor with servo-unit provides boiler
safety against low-temperature corrosion. Control: Expander basic set (order no.
5001).
Schema 6 with two separate controlled heating circuits commanded by servo-
unit. Possibility to select floor heating, radiator heating or combination. The
temperature of domestic water supply according to external temperature, indoor
thermostat or combination.
Separately operated pumps of central heating system and boiler pump. Boiler
protection against low-temperature corrosion provides 3 - way thermostatic valve
(60°C).Control: Expander double set (order no. 5002)
Schema 7 with one controlled heating circuit of central heating with servo-unit
for the floor or radiator heating. Heating of hot supply water provides pump. The
temperature of domestic water supply according to external temperature, indoor
thermostat or combination. Controlled by 4 - way convertor provides boiler
protection against low-temperature corrosion. Control: Expander basic set (order
no. 5001) + 1x thermometer KTY (order no. 1104).
Schema 8 is designed to control reverse water temperature with 3 - way
convertor and boiler pump. The temperature of reverse water is possible to set
between 60 °C up to 75 °C. Schema is designed for central heating system,
where heating circuit is controlled by external regulation or for the boilers with
output over 50 kW ( large water flow - over 2,5 m
3
/hour).
Control: Expander basic set (order no. 5001).
Expander AK4000E complements boiler control unit AK4000. It opens the possibility to control system unit circuits of
central heating including regulation of supply water temperature with use of different heating source. Use of indoor
thermostat, equithermic control (based on extrenal temperature) or its combination offers to control central heating.
Expander AK4000E is supplied in sets. According to particular schema connection, it is supplied as, basic set (order
no. 5001), double set (order no. 5002) and triple set (order no. 5003). After verification of connection schemas of
Expander, servise settings will be supplied with unit settings for central heating system and hot water supply.
(Detailed description given in EXPANDER AK4000E service guide).
Technical requirements for additional accessories:
(To specify type, pump diameter and servo-unit consult with proffesional)!
Pump 230V/50 Hz.
Servo-unit 230V/50 Hz opening period 60 – 240 s
Pump to be installed cca. 0,5 m after 4-way valve.
Maximum electric current for one EXPANDER is 3A.
Additional thermometer to be installed cca. 0,5 m after pump.
External thermometer to be installed on the nothern side of building
Indoor thermostat - free of voltage.
Expander Basic set (order no. 5001)