While in service systems of water heating apply two kinds of regulation - qualitative and quantitative.
In process of rise in temperature of external air teplopoteri premises decrease and should be accordingly reduced teplootdacha heating devices; it reduce, reducing a water temperature, leaving of a copper (qualitative adjustment).
At quantitative adjustment teplootdachi devices change a quantity of water, arriving in the device. Such regulation can be central or local (appointment as a whole or separately on the heating device).
To local regulation systems of water heating apply cranes of double adjustment or three-running cranes which establish on podvodkah to all heating devices of water heating.
a Fig. 49. The crane of double adjustment
1 - the case; 2 - a hollow bronze glass; 3 - a lateral window; 4 - case pass; 5 - a persistent finger; 6 - a spindle; 7 - the socket; 8 - the handle
the Crane of double adjustment (fig. 49) consists of the case 1 in which there is a hollow bronze glass 2 with two lateral windows 3. The glass is connected to a spindle 6 having in the bottom part an external carving. During rotation of a spindle the glass can move in the case upwards and downwards: thus windows 3 will be more or less (or completely) to close pass of the case 4. In the presence of the top distributing of system of heating it is necessary to cover more pass of the case at cranes on the top floors of a building, and on the ground floor to leave it completely opened. It allows to extinguish the superfluous pressure which is available for devices of the top floors.
the Adjustment made during trial start-up of heating system , is called as assembly or primary. Upon termination of regulation on cases of cranes establish motionlessly the sockets 7 having a cut within 90 °. Into this cut insert the persistent finger of 5 handles 8 which are put on the top end executed in the form of a square of a spindle. At handle turn the glass turns and the section of pass of the case decreases. Thus operational or secondary adjustment of devices is carried out.
Adjustment of devices of one-trumpet system with the bottom distributing is carried out by the three-running cranes, giving the chance to change a parity of the quantity of water, arriving in the device and passing through closing site of a strut (fig. 50) more often. If the stopper of this crane closes an aperture "р" turned to a closing site all water from a strut arrives in the heating device.
a Fig. 50. The three-running crane
Switching-off of separate parts of system and regulation of their work make with the help zapornoregulirujushchej armatures - cranes through passage, latches and gates.
regulating cranes through passage with drosselirujushchim the device (fig. 51, established on podvodkah to heating devices, and also in struts and highways Now are issued. The end of a spindle 7 is connected to a zolotnik having a sealing lining which at spindle lowering densely closes an aperture in the case.
Latches (fig. 51 establish on separate branches of system, on bringing and return podvodkah to coppers. Latches consist of the case 6, and thus completely block off heat-carrier traffic on a corresponding site of system.
a Fig. 51. Armature of systems of heating
And - the pith crane; - a latch; in - the regulating crane;
1 - a stopper; 2 - an epiploon; 3 - the loose leaf salnikovyj; 4 - a tetrahedral end face of a stopper; 5 - a bolt; 6 - the case; 7 - a spindle; 8 - a flywheel; 9 - shutter disks; 10 - a wedge
In heating systems widely apply pith cranes (fig. 51.
Instrumentations heating systems are also thermometers and manometres (fig. 52).
Under indications of thermometers define a water temperature, arriving in system, and difference of temperatures in system.
the Difference of indications of manometres , the established on submitting and return highways near to a copper, defines total resistance of system.
a Fig. 52. The thermometer with a sleeve
the Thermometer should be established so that its ball was in a stream of circulating water. The thermometer sleeve should be filled in by lubricating oil. At infringement of any of these rules the thermometer the water temperature will show temperature lower, than.