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4 - INSTALLING THE 42BJ ICM
4.1 - Matching the unit to the false ceiling
Before beginning the installation process it is advisable to
become familiar with the overall drawing of the installation. A
mounting template will assist in making a plan. Your local
Carrier representative can provide one. All components of the
installation must be coordinated on the drawing: ICMs,
35BD/35SR Moduboots, supply and return air ducts, and
fitting the false ceiling.
4.2 - Safety precautions
During the installation process, remove all debris from the
ducts so that nothing is left behind that might damage the unit.
4.3 - Installation procedure
a) Set the ICM on the ground approximately above or below
the spot where it is to be installed in the ceiling or floor void.
• Ceiling void installation:
A hydraulic lift and a folding ladder will make the task easier.
• Floor void installation:
Instal the adjustable rubber feet on the unit. These are
available as optional accessories from your local Carrier
representative.
b) Confirm that the clearances around the unit are sufficient to
allow proper and speedy maintenance. Refer to earlier pages
specifying the clearances required.
c) Offer the template up to the ceiling and mark the position of
the threaded hangers.
The method of fixing the threaded hangers (not supplied by
Carrier) will depend upon the nature and condition of the
ceiling. If in doubt seek professional advice. The maximum
diameter of the hangers is 8 mm.
WARNING:
When moving a unit do not use the water pipe connections,
condensate drain pan, valves, flexible pipes or electrical
cables as handles.
Lift the unit and align it on the threaded hangers. Screw the
nuts on loosely.
NOTE:
At this point do not tighten the nuts fully and do not clamp
the unit up to the ceiling. The nuts will be adjusted finally
when the unit has been connected to the pipework and ducts
and levelled.
d) Level the unit
Adjust the hanger nuts so that the condensate drain pan is about
5 mm below the opposite side of the unit. Check that the slope
is adequate by connecting a 2 m length of 16 mm transparent
pipe to the drain stub. Empty some water into the drain pan
until the water level in the pipe is at the lower edge of the drain
pan.
The water level in the opposite end of the pipe should be about
5 mm below the base of the drain pan. Refer to the figure
above.
e) Condensate drain pipe
Use clear 16 mm bore plastic cold water pipe and provide a fall
of 20 mm/m over the whole horizontal pipe run. Instal a 50 mm
(minimum) siphon to prevent gases and odours from flowing
back into the ceiling void.
NOTE:
The condensate drain pipe has to be secured to the drain pan
by a collar (not supplied by Carrier).
Fall
20 mm/m
Siphon
50 mm
