39
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. 22
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%.
The heating systems with an open expansion tank enable a direct contact between the water and
atmosphere. During the heating season the water expanding in the tank absorbs the oxygen which
increases the corrosive effects and at same time water evaporates significantly. For a refill there can
only be used water treated to the values according to
Č
SN 07 7401.
12. Bleed the heating system.
13. Boiler must be properly earthed. For grounding there is used an external protective clamp in the rear
part of boiler.
14. Fill the heater with water (if the heater is connected). In case of a longer hot water distribution system
the pipes must be insulated in order to reduce the heat loss.
15. After the system has been filled with water set the Honeywell V 4044F three-way valve operation
lever from the MAN-OPEN position into AUTO position see. fig. no. 22 (if the HWS preparation is
installed).
16. Connect the outdoor thermostat type 950 01 (only for boilers equipped with two-stage gas valve).
The outdoor thermostat must be positioned at the northern or northwest wall of the building. The
assembly and connection must follow the instructions stated in thermostat manual. The thermostat
switching off temperature is set to 0°C and it can be changed within 0±8°C range as need may be.
17. Connect the selected type of regulation according to the enclosed manual..
18. The plastic foil, wooden pallet and cardboard packing after boiler unwrapping must be thrown out into
the waste containers intended for this purpose.
During the heating season the water volume in heating system must be kept constant and the heating
system has to be blown through. Water from boiler and the heating system must never be discharged or
taken for usage except for the emergency cases like repairs etc. Water discharge and filling with new water
increases the danger of corrosion and scale development.
In case we have to refill the heating system with water we only refill a cold boiler in order to prevent
the boiler sections from disruption.
AUTO position
MAN-OPEN position
Summary of Contents for GARDE G 42 ECO
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