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Items supplied with unit
6720813173 (2014/09)4
Boiler ( fig. 2)
(to be ordered from your supplier)
Mounting bracket
•Boiler
•Siphon
Installation instructions.
Fig. 2 Items supplied with the boiler assembly
pump group ( fig. 3)
(to be ordered from your supplier)
Connection kit
Installation instructions.
The connection kit consists of:
Maintenance valves
Drain cock
Gas isolation valve
Pressure relief valve
Non-return valve
•Pump
Pressure gauge.
Fig. 3 Items supplied with pump group
Worcester supplies cascade systems in TL and TR configurations:
TL: Inline installation
All boiler assemblies are in a line enabling an easy-to-monitor installation
in a narrow room.
TR: Back-to-back installation
The boiler assemblies are located on both sides of the frame and are
installed back-to-back to create a compact installation which ideally
suits rectangular rooms and which ensures the best possible access to
all boilers.
Depending on the desired output, a choice can be made between
different types.
Boiler assembly connection kit
The connection kit can be used for the 50-kW, 65-kW, 80-kW and
100-kW version. The connection kit includes a pressure relief valve,
a non-return valve, a pump and isolating valves.
Bend sets with low loss header
The GB162 cascade system can be installed in various configurations
( fig. 4). By using the bend set the low loss header can be installed at
an angle to the boilers. The gas pipe is reversible so that the gas
connection can be at the other side of the boilers to the flow and return
connections to the header.
Fig. 4 Cascade system configuration varieties
6 720 648 720-001.1TD
6 720 648 720-002.1TD
Low loss
header
TL-configuration
(inline)
TR-configuration
(back-to-back)
2½" TL2, TL3 TR2
3" TL4 TR3, TR4
4" TL5, TL6, TL7, TL8 TR5, TR6, TR7, TR8
Table 2 Low loss header configuration
1 21 2
1 21 2
1 21 2
7214 6000-004.1TD
4


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