Setting The Dirty Filter Sensors; Maintenance; Check Every Three Months; Check Every Six Months - Trane MERCURY EDAB 1105A Technical Manual

Setting the dirty filter sensors

The PFS differential pressure switch is set according to the
loss of load dependent on the dirt inside the filters and the
air flow.
The PFS differential pressure switch must be set at 3 mbar
(=300 Pa).
To set the PFS pressure switch, carry out the following
procedure:
• gradually cover the surface of the air filter and check that
the pressure switch intervenes when the filter is about
50-60 % covered;
• if the pressure switch does not intervene, gradually lower
the setting, if it cuts in too soon, increase the setting:
- using a star screw driver turn the regulation screws of
the pressure switch to the desired value.
PKG-SVX19B-E4

MAINTENANCE

Check every three months:

Carry out the following checks every three months:
• check the power supply;
• check the alarm status;
• check the working pressures and temperatures;
• check the correct operation of the local/remote
controls;
• check the air filters, cleaning and replacing them if
necessary;
• check the efficiency of the condensing drain;
• check the steam cylinder is clean, replacing it if
necessary;
• check and clean if necessary the condensing coil.

Check every six months:

Carry out the following checks every six months:
• repeat these checks every three months;
• check and clean if necessary the cooling coil;
• check the operation of the humidifier (if present).

Annual checks

Carry out the following checks every year:
• repeat these checks on a every six months;
• check the varnish and the nuts and bolts;
• check the hinges, rabbets and gaskets;
• check the cables and wiring;
• tighten the terminal blocks;
• check and reset if necessary the safety device settings
(pressure switches, thermostats, protection devices);
• check the operation of the post heating electrical
heaters
• check the fittings, operation and absorption of the
evaporating fan/s;
• check the fittings, operation and absorption of the
compressor/s;
• check and if necessary replace the seal of the refrigerant
circuit/s and tighten the joints and connections of the
unit;
• check and top up if necessary the refrigerant gas and/
or oil;
• check and if necessary reset the regulation devices
setting;
• check and if necessary replace the seal of the hydraulic
circuits/s and tighten the unit couplings;
• check the fittings and operation of the condensing
fan/s;
• check and reset if necessary the condensing speed
setting.

Checks to be performed every sixty months

• Check and if necessary replace the gas filters;
• check and if necessary replace the compressor oil.
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