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Instruction manual TWI 35-130 G/TWI 45-190 G 21
3.6 Water connections
unvented
3.7 Water connections
vented
Warning
The installation shall be carried out by a recognised installation engineer in
accordance with the generally and locally applicable regulations (1.3 “Regulations”).
3.6.1 Cold water side
See (A) in the connections diagram (3.5 “Connections diagram”).
1. Position an approved stop valve (4) on the cold water side in accordance
with the applicable regulations (1.3 “Regulations”).
2. The maximum operating pressure of the device is 8 bars. As the water
piping pressure can incidentally exceed 8 bars, mount an approved
pressure reducing valve (1).
3. Mount a non-return valve (5) and an expansion vessel (16).
4. Mount an expansion valve (15) and connect the overow side to an open
water drainage pipe.
3.6.2 Hot water side
See (B) in the connections diagram (3.5 “Connections diagram”).
Note
Insulation of the long hot water pipes prevents unnecessary loss of energy.
1. Option: mount a temperature meter (12) for checking the temperature of
the tap water.
2. Mount the T&P valve (3).
3. Mount a stop valve (11) in the hot water distribution piping for service purposes.
3.6.3 Circulation piping
See (C) in the connections diagram (3.5 “Connections diagram”). If you want to
have hot water available immediately, you can install a circulation pump at the
draw-off points. This is more comfortable and avoids spillage of water.
1. Mount a circulation pump (6) wit a capacity that corresponds with the size
and the resistance of the circulation system.
2. Mount a non-return valve (5) following the circulation pump to guarantee
the circulation direction.
3. Mount two stop valves (4) for service purposes.
4. Connect the circulation piping to the cold water supply pipe.
3.6.4 Condensation drainage
1. Attach underneath the fall a drainage pipe to the siphon (13) for
condensation drainage and connect this to the water discharge pipe.
Attention
All connections downstream the siphon shall be condensation-resistant.
Warning
The installation shall be carried out by a recognised installation engineer in
accordance with the generally and locally applicable regulations (1.3 “Regulations”).
3.7.1 Cold water side
See (A) in the connections diagram (3.5 “Connections diagram”).
1. Mount on the cold water side an approved stop valve (4) between the
water tank (18) and the device in accordance with the applicable
regulations (1.3 “Regulations”).
3.7.2 Hot water side
See (B) in the connections diagram (3.5 “Connections diagram”).
Note
Insulation of the long hot water pipes prevents unnecessary loss of energy.
21


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