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temperature of +60
º
C on the inlet of the boiler (on the “Inlet” sensor of the boiler) is equal
to the value specified in the Table 2.
Value of the starting current strength is higher than the table value specified in the
Table 2.
In this case it is necessary to add water the specific electric resistance of which is
significantly higher than a value specified in the operation manual. This may be distilled
water, clear uncontaminated filtered rain water, snow melt water. Potable water with high
specific electric resistance (Table 1) can be also used. A volume of water which is added to
the heating system depends on the volume of water filled in the heating system. A
procedure of adding water with high specific electric resistance to the heating system is
similar to a method of adding salt solution in the event that the starting current strength
and the maximum current strength are lower than the value specified in the Table 2.
A volume of water with high specific electric resistance which is added to the heating
system should be equal to a volume of water drawn off from the system.
If the heating system works without circulation pump, a value of the specific electric
resistance can be changed by the following ways:
•
Increase the number of single additions of salt solution or water with high
specific electric resistance to the heating system.
•
Decrease the salt solution doses or volume of water with high specific
electric resistance added to the heating system.
•
Increase the volume of water pumped to the surge tank by means of the
“Malysh” type pump after each addition of salt solution or water with high
specific electric resistance to the heating system.
Switching on the boiler
Switch on the boiler and establish the most careful control over the boiler’s
automatic switching on and switching off.
It is inadmissible to switch on the boiler at presence of the frozen heat-transfer
agent in the system or in danger of freezing the heat-transfer agent.
The temperature of the premise in which the heating system is installed should lie in
the range + 15 ÷ +20
º
C.
In case of the heating system and the electrical connection diagram for the
equipment (including automatics) are mounted correctly, the system will start to get warm.
In case of gradual power decreasing of the boiler at the initial period of work (fresh
water as a heat-transfer agent) it is necessary to perform the following steps:
•
Remove the boiler from the heating system.
•
Disassemble the boiler and decontaminate the surfaces of electrodes and
internal surfaces of the boiler.
•
Assemble the boiler and install it into the heating system.
Preventive maintenance. Washing of the heating system
The purpose of this task consists in providing the reliable, effective, and long-term
work of the heating system. The task is performed by the qualified personnel. The heating
system should be disconnected from the power network.
The preventive maintenance is performed by the firm (organization) having the
corresponding license for performing these tasks. On completion of the preventive
maintenance the organization (firm) which has performed these tasks should make an entry
in the List (Appendix No. 2) which is assured by the person responsible for performing these
tasks and by the seal of this organization.
The preventive maintenance is performed after termination of the cold season. The
periodicity and composition of the preventive maintenance is defined both by the heat-
transfer agent used in the system and by the defects detected during the operating and
inspection of the heating system and the boiler.
Water as a heat-transfer agent
Annually right after the ending of the cold season it is necessary:
