Specifying FS 24 and FS 25 assemblies
It can be seen
that a force cooled assembly is a complex
arrangement of many separate heat sinks
or modules. The position of each heat
sink in the assembly is important if each
one is to perform in the most effective
way. Customers may send their requirements
to HS Marston by following the few simple
instructions given below. Complete asemblies
may be specified in shorthand form. Details
of assemblies are acceptable in the form
of working drawings. It will always be
understood that separate modules will
be electrically separated.
Specify
an assembly in the following way
1.
Always view an assembly from the fan end
(i.e. on the end to which the fan will
be fitted).
2. Number the sectors (in the case of
24 WF and 25 WF assemblies the sectors
are quadrants) in a clockwise direction;
the top right hand sector is No.1.
3. Select the orientation of the end plate
(U1 or U2). Commence and finish the total
specification with the code for the end
plate thus:
U1, sectors (1
to 4) 24 WF- 0137AD1 x 4;UI
4. (a) Commencing
with sector 1, specify the module furthest
from the fan first and then in sequence
to the module next to the fan in code
(see paragraph c below) on the same line.
Ensure this information refers to sector
1 thus:
Sector
(1) 24 WF - 0281S - 1:24 WF - 0137 - 1
Specify modules
in the next sector in the same way and
write the data for each sector beneath
the data for the previous sector, ensuring
that the sector number is quoted, until
the data for all sectors is given. When
all sectors contain the same modules in
the same sequence it is only necessary
to write the specification thus:
Sectors
(1 to 4) 24 WF - 0218S - 1; 24 WF - 0137S
- 1
When each sector
contains a succession of modules alike
in every respect, then it is only Sectors
(1 to 4) 24 WF - 0137AD1 x 4 (For method
of specifying a module see (4) (c) below)
(b) Ensure each sector contains the same
overall length of modules.
(c) Specify each module in the same way
as follows:
24
WF |
-
137 |
AC |
1 |
Extrusion
Shape
Shelf model - 24 WF
Platform model - 25 WF
(see fig.1)
|
Length
of module -
Inches (to two decimal
places; express as hyphen and 4
digits) Millimetres (to one decimal
place: express as 5 digits including
zeros) (For standard module lengths
see Table 1).
|
Hole
Pattern
If no standard to suit
write S
and send drawing. |
Surface
Finish
1 - Plain (as extruded
2 - Matt Black Anodise
3 - Alocrom
|
(d) Specify
any added parts (e.g. Fan) below the assembly
specification and if added parts are complex
send drawing.
(e) Check specification agianst figures
2, 3, 4 and 5 to see if all details are
given in the correct way. |
