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3.2 - Installation procedure
•
Place the 36XB on the ground, in the location where it
is to be installed in the suspended ceiling. For
installation in the suspended ceiling, a folding ladder
and a lifting platform will facilitate installation of the
units: Fig.7.
•
Check that the clearances around the unit are
sufficient to allow easy maintenance. Refer to the
plans under "Maintenance requirements".
•
Mark the position of the threaded rods in the ceiling
(it may be a good idea to create a drilling template if
there are several units to be installed). The method for
securing the threaded rods, not supplied by Carrier,
depends on the type of ceiling (maximum diameter of
the threaded rod = 10 mm). Once the threaded rods
are anchored to the ceiling, screw in the first nuts.
ATTENTION: Never lift the unit using the coil
connections, the valves/hoses, wiring harnesses, or the
condensate pan.
Lift the unit and engage the threaded rods, fit the nuts and
tighten them securely.
NOTE: Do not fully tighten the nuts at this stage and do
not lock the device against the tile (leave a space between
the tile and the device). The nuts will be adjusted after the
hose or pipe system has been connected and the unit
levelled.
At this point, adjust the position of the device; the device
must be perfectly level.
Condensate drain pipe: Fig. 9.
Use a hose with an interior ø of 16 mm and create a slope
to ensure that the condensate pan can always drain freely,
with no obstacles on the route: Fig.18. Provide a siphon of
at least 50 mm (9a) to prevent gas or drain odours seeping
into the suspended ceiling.
If multiple units are connected to the same manifold, a
siphon should be used, see Figure 8. Before starting up the
unit, check that the water flows correctly from the internal
condensate pan by pouring water into it. If it does not,
check that the pipe is tilted at the correct angle and look
for potential causes of the problem encountered.
When the installation is ready (when the 36XB unit is
secured to the ceiling, the air connections complete, the
piping manifolds with isolation valves ready, and the
electrical installation prepared), connect the piping
(Carrier recommends using the flexible hoses which can be
provided as accessories). Each hose is fitted with a 1/2" gas
union nut, depending on the model. Remember to fit a
gasket between the union nut and the stop valve (gasket
not supplied by Carrier).
When all units are installed, open the isolating valves on
the manifolds, and purge and then pressurise the circuits.
To purge the coils, slightly undo the purge screws. The
installation is now operational.
ATTENTION: All valves and components connected
to the unit on which condensation may form must be
insulated (not supplied by Carrier).
NOTE: Only power up when all units are connected
and earthed.
3.3 - Removal procedure
Disconnect the power for the device, using the circuit
breaker (not supplied by Carrier) fitted for this purpose
during installation.
•
Disconnect the power supply and connection cables.
•
Close the isolation valve on the manifolds.
•
Drain the isolated unit using the purge device
provided.
•
Disconnect the hydraulic hoses by unscrewing the
union nuts.
ATTENTION: As the hydraulic hoses are not fitted with
valves, ensure a container is provided for draining the
coil.
•
Disconnect the fresh air intake duct.
•
Disconnect the condensate drain hose and drain the
siphon into a container.
•
Gently raise the unit, and unscrew the 4 nuts on the
threaded rods Lower the unit.
4 - COMPONENTS
4.1 - Fan motor assemblies
4.1.1 - Removal procedure for the fan assembly
CAUTION: Before any work on this product, it is essential
that the power supply to the unit is disconnected.
If the fan motor assembly is not functioning correctly, the
entire fan motor assembly must be removed and replaced:
• Open the grille: Fig. 10-11
• Remove the safety device: Fig 6
• Disconnect the fan motor assembly electrical
connections (power and control for variable speed
motor).
• Remove the electronic control unit from the fan
(secured by screws): Fig. 12
• Remove the 4 screws supporting the fan: Fig. 13
• Detach the complete fan motor assembly.
• Once work is complete, refit the assembly in the reverse
order to removal.
NOTE: Ensure that the fan wheels are not damaged when
removing/replacing the fan motor assembly, as this can
affect balance.
For a variable speed motor, ensure that the power cable is
separated from the control cable, and keep them as far
apart as possible.
9
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