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Instruction manual ADM 23
is
3.6 Water connections,
Unvented
Warning
The installation should be carried out by an authorised installation engineer,
in compliance with general and local regulations (1.3 "Regulations").
3.6.1 Cold water side
See (A) in the installation diagram (3.5 "Installation diagram").
1. Fit an approved stop valve (4) on the cold water side as required by
applicable regulations (1.3 "
Regulations").
2. The maximum working pressure of the appliance is 8 bar. Because the
pressure in the water pipe at times can exceed 8 bar, you must fit an
approved pressure-reducing valve (1).
3. Fit a non-return valve (5) and an expansion vessel (16).
4. Fit an expansion valve (15) and connect the overflow side to an open
wastewater pipe.
3.6.2 Recirculation pipe
You can install a top to bottom circulation pump to prevent water stacking in the
boiler.
1. Optional: depending on the draw-off pattern, fit a recirculation pipe (Ø 22
mm), a stop valve (11) and a top to bottom circulation pump (7).
2. Fit a non-return valve (5).
3. Fit a stop valve (11).
3.6.3 Hot water side
See (B) in the installation diagram (3.5 "Installation diagram").
Note
Insulating long hot water pipes will prevent unnecessary energy loss.
1. Optional: fit a temperature gauge (12) so you can check the temperature of
the tap water.
2. Fit the T&P valve (3).
3. Fit a stop valve (11) in the hot water outlet pipe for servicing.
3.6.4 Drain valve
1. Fit the standard drain valve (9) supplied with the appliance.
2. If applicable, fit a circulation pipe (3.6.5 "
Circulation pipe").
If not, fit the blind threaded plug and gasket (C) supplied with the drain valve,
as shown in the figure.
C
IMD-0122 R1
23


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A.O. Smith ADM 135 Usermanual and installation guide - Dutch - 68 pages


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