Connecting The Unit To The Duct System; Drainage System - S&P UTBS Serie Manuel D'installation

• We suggest having all the elements needed for the installation on hand, mentioning the
following devices in particular:
- Unit intake pre-filter that traps suspended particulate matter.
- Bleed valves should be fitted at each of the high points in the installation to maintain
good water circulation.
- It is recommended to keep water in the hydraulic system at all times (install an
auto-filler valve and pressure switches that send an alarm and shut off power to
the equipment, etc.)
- Check to make sure that the flow of water circulating through the unit is appropriate.
- Shut-off valves must be installed at each connection on the water line to allow the
unit to be isolated if necessary (to clean filters, make repairs, replace parts etc.) and
avoid the need to completely drain the water circuit.
- Anti-vibration bellows should be installed at the inlet and outlet from the unit to
prevent the transmission of vibrations that could result in damage to the heat ex-
changer coils due to excess stress on the circuits.

6.9. CONNECTING THE UNIT TO THE DUCT sYsTEM

• Never use the unit as a support or weight-bearing structure for ductwork.
• Connect the unit to the air ducts using flexible connectors to prevent vibrations from being
transmitted to the duct system.
• Check to make sure air intake and flow are not being blocked and that there are no obsta-
cles impeding good air circulation. Failure to do so will affect the efficiency of the system.

6.10. DraINaGE sYsTEM

• A siphon must be installed with pressure head difference in mmWG greater than the pres-
sure provided by the fan, to facilitate draining condensate from the tray.
• The drainage system should have a minimum slope of 2%.
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