Bosch 11 KW Manuel d'instructions télécharger pdf (Page 22)

INSTALLATION

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After the manifolds and the flow control valves, the coils are connected

to a collecting pipe. A filling link, filter and the plastic expansion vessel

supplied with the heat pump are connected to the collecting pipe. A

pressure relief valve is connected to the outgoing pipe.

One circuit at a time is filled with heat transfer fluid. Keep the valves

closed in the other loops during the process.

Fig. 17 Single circuit system

[1] Heat pump

[2] Expansion vessel

[3] Filling link

[4] Collector

Fig. 18 Multi-circuit system

[1] Heat pump

[2] Expansion vessel

[3] Filling link

[4] Manifolds

[5] Control valves

[6] Collector

13.2 DETAILED DISCHARGE PIPE INSTALLATION

REQUIREMENTS (COMBI MODEL)

The discharge pipework must be routed in accordance with part G3 of

schedule 1 of the building Regulations.

The tundish should be vertical, located in the same space as the

unvented hot water cylinder and be as close as possible and within

600mm of the safety device e.g. the temperature relief valve. The dis-

charge pipe from the tundish should be:

• made of metal

• at least one pipe size larger than the nominal outlet size of the safety

device (larger sizes may be required if the equivalent hydraulic

resistance exceeds that of a straight pipe 9m long - refer to BS6700)

• terminate in a safe place where there is no risk to persons in the

vicinity of the discharge, and position safely from electrical devices

• have a vertical section of pipe at least 300mm long below the tundish

before any elbows or bends in the pipework.

Fig. 19 Typical discharge pipe arrangement

[1] Safety device (e.g. temperature relief valve)

[2] Metal discharge pipe (D1) from temperature relief valve to tunish

[3] 600mm maximum

[4] Tundish

[5] 300mm minimum

[6] Metal discharge pipe (D2) from tundish, with continous fall

[7] Discharge below fixed grating

[8] Fixed grating

[9] Trapped gulley

13.3 COLLECTOR SYSTEM

INSTALLATION AND FILLING

Installation and filling of the collector system should comply with

applicable laws and current regulations, the MCS MIS 3005 standard

should be referred to for guidance. Soil used for refilling around the

collector hose must not contain stones or other sharp objects. Pressure

test the collector system before refilling to ensure that the system is

watertight.

When cutting the collector, it is important that no dirt or gravel enters the

system. This can cause blockages in the heat pump and damage

components.

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Valve

outlet

size

Size of

discharge

pipework

Size of

discharge

pipework

Maximum

length of

straight pipe

(no bends or

elbows)

Deduct the figure

below from the

maximum length for

each bend or elbow in

the discharge pipe

22 mm Up to 9 m 0.8 m

G1/2 15 mm 28 mm Up to 18 m 1.0 m

35 mm Up to 27 m 1.4 m

28 mm Up to 9 m 1.0 m

<G3>/4 22 mm 35 mm Up to 18 m 1.4 m

42 mm Up to 27 m 1.7 m

35 mm Up to 9 m 1.4 m

G1 28 mm 42 mm Up to 18 m 1.7 m

54 mm Up to 27 m 2.3 m

Table 18

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1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 71 72

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Bosch 11 KW Manuel d'instructions Page 22

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