Viadrus GRAND G 36, Manual For Operation And Installation

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4. Assemble the draught diverter, mount the combustion products return flow fuse. The parts are
delivered together with boiler.
5. The combustion products return flow fuse must not be put out of operation. It is forbidden to
interfere in an unskilled way with the combustion products return flow fuse. Only the original
parts delivered by the manufacturer are allowed to be used for combustion products return flow
fuse assembly and its faulty parts exchange.
6. Connect to the chimney.
7. Install the water heater (if it is required). In order to ensure the preferential HWS heating it is necessary
to use Honeywell V 4044F three-way valve. A clack valve is installed between the pump and the three-
way valve. At the assembly it is necessary to observe the connection direction according to the signs on
this valve.
Fig.no.14 shows the valve in a position when there is opened the heating water inlet into the heating
system. In case of a requirement for the hot service water there is automatically closed the „B“ outlet into
the heating system and opened the „A“ outlet into the reservoir.
The valve must be mounted in position shown in fig. no. 14 and no. 15.
The valve must not be turned during the assembly!
Fig. no. 14 Honeywell V 4044F three-way valve
8. Connection to gas.
Gas is connected to boiler through the gas spherical closing cock.
9. Release the bleeder screw of automatic bleeder valve. It must be released when filling the heating
system with water and when operating the boiler.
10. Before you fill the system with water you must set the Honeywell V 4044F three-way valve operation
lever from AUTO position into MAN-OPEN position (if HWS preparation is installed).
Fig. no. 15 Honeywell V4044F three-way valve operation
11. Filling the heating system with water. The heating system must be thoroughly flushed out in order to
wash out all impurities that can be deposited in distribution system or in the radiators and cause the
pump clogging.
Water for filling the boiler and the heating system must be clear and colourless, with no suspended
materials, oil and aggressive chemicals. Its hardness must comply with
Č SN 07 7401 and in case that
the water hardness doesn’t comply with this standard it must be treated. Even heating the water with a
higher hardness several times does not prevent the soils from getting precipitated on the boiler drum
walls. Precipitation of 1 mm calcite reduces at a given point the heat transfer from the metal to water by
10%.
A - stack water heater
B - heating system
AB - boiler
Conductor colour:
Green & yellow
brawn
blue
orange
grey
AUTO position
MAN-OPEN position