22 Instruction manual TWI 35-130 G/TWI 45-190 G
3
Installation
3.8 Gas connection
3.9 Air supply and fl ue
gas discharge
1. Mount the T&P valve (3).
2. Option: mount a temperature meter (12) for checking the temperature of
the tap water.
3. Mount a stop valve (4) in the hot water distribution piping for service purposes.
4. If circulation piping is required, proceed by mounting the circulation piping
(3.6.3 “Circulation piping”).
3.7.3 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.
3.7.4 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”).
Caution
Make sure that the diameter and the length of the gas supply pipes are
suitable for delivering suffi cient capacity to the device.
See (D) in the connections diagram (3.5 “Connections diagram”).
1. Mount the gas valve (10) in the gas supply pipe.
2. Purge the gas pipe before use.
3. Close the gas valve.
Warning
Check for leakages after mounting.
3.9.1 Introduction
This section describes the following subjects:
• Requirements for fl ue gas discharge material
• Parallel connections
3.9.2 Requirements for fl ue gas discharge material
Warning
The installation shall be carried out by a recognised installation engineer in
accordance with the generally and locally applicable regulations (1.3 “Regulations”).
There are various possibilities for connecting the air supply and fl ue gas
discharge, dependent on the inspected device types.
The devices have been inspected for the device types B23, C13, C33, C43,
C53 and C63.
The fi gure and the table provide information about these device types. Please
contact the manufacturer if you require an explanation of the possibilities.
