Hochiki SDP-2 - Manual (Page 2)

Hochiki Europe (UK) Limited Page 2 of 4 2-3-0-456/ISS5/FEB09
STEP 2 - Adjusting Pipe Length
‰ After measuring the diameter of the duct and
deducing the length of pipe required, shorten the
pipe if necessary. The pipe should penetrate a
minimum of 90% of the width of the duct.
‰ Do not cut the end of the pipe with warning label.
‰ Only cut between sampling holes.
‰ Once cut to length, insert the end plug.
Large Diameter Ducts
When using a sampling pipe within a duct greater than
600mm diameter the pipe should penetrate the whole
duct:
‰ Shorten the pipe to correct length if
required
‰ Insert the end plug
‰ Fit the end plastic gasket
‰ Fit the rubber gasket
STEP 3 - Fit Sampling Pipe to SDP-2
Before fitting the pipe to the unit, remove the cover and
the air-flow block. With the sampling pipe cut to length,
fit it to the underside of the SDP-2 unit:
‰ Mount the gasket (A) on to the pipe the correct way
round (see below)
‰ Push the pipe into the hole in the underside of the
unit (the pipe is specially shaped to only fit the
correct way round).
‰ Tighten the locking screw to secure the pipe to the
unit.
STEP 4 - Drill Hole in Duct
Before mounting the SDP-2, drill a hole in the duct for
the sampling pipe:
‰ Without bracket - hole diameter = 35mm
‰ With bracket - hole diameter = 48mm (see “Using
the Optional Mounting Bracket” on page 4).
STEP 5 - Mounting the SDP-2 on the Duct
‰ Carefully mount the SDP-2, inserting the sampling
pipe into the hole in the duct wall.
‰ Secure the SDP-2 with the supplied three 25mm
Self-tapping screws (positions shown).