Dunham-Bush M1 Instrukcja instalacji, obsługi i konserwacji - Strona 3

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Medium pipe

Table 3: Approximate masses per linear metre of Dunham Strip without accessories

INSTALLATION

Refer to the Dunham-Bush BL drawing provided.

Fixing

Leave sufficient clearance at each end, to make pipe

connections. Fit sliding brackets at 3m centres to

suit fixing points and adjustable hanger rods

previously installed. Lift and position each panel into

the brackets.

Grading

Grade each run by means of adjustable drop rods

Hot water installations are usually graded to a

minimum 1:250 in the direction of flow, to the highest

point of the return main, which should have an air

vent. Steam installations must be graded to a

minimum 1:200 in the direction of flow, down to a

suitable steam trap.

Cover Plates and End Closers

If supplied, fit cover plates to joints between

individual lengths and fit end closers at the end of

each run or between individual strips. Fix using

screws, lock nuts and washers supplied.

Cover plates cannot be used with MF or HF (flanged

connection) type panels.

Diagram 3: Cover plate CP1 for M1 Dunham Strip

COMMISSIONING

Fill and vent the systems and pressure test in

accordance with recognised practice.

Adjust the water volume flow rate in each circuit by

means of balance valves to obtain the specified

water temperature drop.

With the system operational, check that the strip is

not distorted due to expansion movement.

Mass (kg/m)

5.3

10.3

15.6

20.6

Heavy pipe

Pipework Connections

The system should be designed to allow for

expansion of radiant panels. Refer to the mechanical

services drawings.

Connections will be supplied as specified, from a

choice of plain ends for welding, screwed ends for

use with unions or flanged ends.

The position of flow and return connections will

depend upon the circuitry of the installation. Tubes

should be connected in parallel to minimise bowing

due to differential expansion. Expansion

compensators, expansion loops or floating pipe

connections should be used depending on the size

and layout of the system,.

N.B. Sliding brackets are designed to give variable

installation position only, not to accommodate

expansion movement i.e. hanging rods should be

long enough to allow for expansion movement

Diagram 4: End closer EC1 for M1 Dunham Strip

Pipe Type

Plain ends

(for welding)

Screwed ends

1¼" BSP taper

Flanged ends

Table 2: Site test and working pressures

Mass (kg/m)

6.1

11.8

17.8

23.6

Cold

Max. working

test pressure

pressure

(barg)

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