Installation
UNT-SVX10G-E4
54
Pre-start checkout
1. Check the units are correctly
installed and have a slight slope
towards the water outlet.
2. Make sure the fan rotates freely
on its shaft.
3. Check the filter is in place, if
present. It is necessary to have a
set of filters available because
the first set will quickly become
clogged due to jobsite dust.
4. Make sure all water connections
(chilled water, hot water,
condensate tray) are tightened
correctly, leak free and insulated.
5. Make sure all electrical
connections are tightened
correctly.
6. Make sure the units are clean.
7. Check the condensate tray
drainage pipe is connected and is
not obstructed.
8. Check and clean the condensate
tray and make sure the drainage
line is free.
Installation checklist
The installer should use this list to
ensure that all necessary operations
have been performed before
startup. For more detailed
information refer to the relevant
paragraphs of this manual.
•
The unit has been securely
suspended from the ceiling in
compliance with safety rules.
•
Unit frame is level in both
directions or has a slight slope
towards the water outlet.
•
Clearances are sufficient to allow
maintenance.
•
Condensate trays are connected.
•
No dirt in the condensate tray.
•
Hydraulic connections carried
out, insulated, and tightened. The
valve connection can be leaky
until the seal inflates. After few
minutes, tighten if necessary.
•
Electrical connections carried out
in compliance with the diagrams
and local regulations.
•
Filter is in place and clean.
•
Anti-freeze protection of coils if
necessary.
•
The water loop is balanced.
•
No foreign bodies in the unit.
•
Adjuster and balancer bends
adjusted and insulated.
•
Units checked in operation
(switches, thermostats, undue
noise or vibration,etc.)
•
Instructions given to user of the
fan coil about how to operate the
unit.
Commissioning
•
Check that the unit is undamaged
and securely mounted
•
Check the power supply
•
Balance the airflow through the
grilles / diffusers
•
If the reading is outside the
design flow, the airflow can be
adjusted by means of the fan
speed adjustment in the control
box. (Refer to Figure 24). For a
unit equipped with 200 mm
diameter spigots, the
recommended airflow per spigot
is 290 m
3
/h and not exceed
450 m
3
/h in any case. For a unit
equipped with 150 mm diameter
spigots, the recommended
airflow per spigot is 220 m
3
/h and
not exceed 341 m
3
/h in any case.
This work should only be
undertaken by a qualified
electrician and the unit should be
externally isolated before the
control box is opened
Initial condensate pump operational
test
This operation enables to:
•
check the correct installation of
the system
•
to bring the pump to its
minimum noise level
•
to make the duck valve seal
When unit is installed, follow the
steps below to fill the pump in
water:
1. Clean the condensate pan of any
debris
2. Put water directly in the
condensate drain pan
3. The pump must start to suck
water and fill the clear tubing
and the stop
4. Then, the pump will cycle ON
and OFF until water enters the
pump and come out of the
pump. If not, put more water
5. Make sure that a minimum of
30 cm of water column is
maintained above the pump
6. Check alarm function by
continuing to put water until the
alarm triggers (Stop flow rate by
closing the water valve).
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