MHS Boilers ADI LT, Инструкция по установке, эксплуатации и обслуживанию

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ADI LT boiler - Technical Manual Page
L338 11/2011
40
15.7.4 Water manifold
-
It avoids hydraulic unbalances between the circuits and the boilers.
- It ensures a constant water flow to the boiler, independently from the
consumptions required. In accordance with current regulations.
-
In case of heavy sludge in the water, it drives it to the bottom of the tank. It can
not avoid lighter sludge.
It is necessary to install (2) an automatic purger of big capacity in the higher part of
the tank, (3) an appropriate drainage with a diameter of 50/60, and optionally, (1) a
manual purger with a diameter of 15/21.
According to the total power installed (the sum of the heating output of all the boilers installed), may be calculated
the dimensions of the water manifold, as shown in this chart: diameter (inches) and minimum height.
Inertial volume
ADI LT
OPTION 1 (see text) OPTION 2 (see text)
Nr. Boilers 
1 boiler 2 boilers 3-4 boilers 1 boiler 2 boiler 3-4 boilers
ADI LT 105
20 litre 30 lit. 40 lit. 40 lit. 65 lit. 75 lit.
ADI LT 120
32 lit. 45 lit. 65 lit. 50 lit. 100 lit. 125 lit.
ADI LT 200
35 55 80 60 115 175
ADI LT 200
55 85 120 80 155 200
ADI LT 250
35 40 55 65 125 175
ADI LT 325
55 65 100 100 190 250
ADI LT 375
75 100 150 125 245 300
ADI LT 475
105 155 220 175 335 375
ADI LT 550
70 100 150 150 175 225
ADI LT 650
105 165 200 175 250 310
ADI LT 750
135 lit. 210 lit. 300 lit. 200 lit. 300 lit. 385 lit.
This inertial volume may be distributed between (see system drawings in this document) :
o
Water header / collectors linked by a by-pass (not closed) or one common water header / manifold.
o
Water pipes between header / collector and boilers.
OPTION 1:
Boiler cascade (for 2 or more boilers) controlled by a controller :
o
Siemens model: RVA 47, RVA 63, RVS 63…
o
Similar controller from another trademark with 0
…10 V control signal per boiler (one signal per each
boiler), to control the cascade of several boilers.
Caution: when consumption is DHWS instantaneous production (that means no buffer vessel of DHWS) with quick
and hight consumption peaks

the inertia volume must be used Option 2
OPTION 2:
-
No controller manages the boiler cascade (for 2 or more boilers at the same circuit).
- Instantaneous DHWS production.
Installations with a sufficient inertial volume and a constant water flow, without interruption.
These are installations where the main circuit/s has/have a minimum water capacity ensuring a constant and
uninterrupted water flow to the boilers (unless the boilers stop). For example:
- Heating circuits with a main loop to which are connected A.H.U., fan-coils, where there are the control
el valves. This loop will have a enough water capacity to ensure a constant water flow to the boilers.
- Renovation of old boilers rooms (previously located in the basement) which have been moved to the top of the
building or terrace, where the flow and the return piping connecting the new boilers room to the old one have a
sufficient water capacity to guarantee a constant water flow, without interruption, through the boiler.
See system drawings.