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6.0 COMMISSIONING & SETTING TO WORK

(Note – not all of the components listed here are necessarily
included with the equipment supplied).

6.1 FILTERS

Remove filter access panels (observe and note airflow direction labels),
inspect filters for contamination with construction debris, replace as
necessary. Replace access panels.

Filter pressure drops will depend on actual flow rate and condition.
Observe and record filter pressure drops after performance
commissioning.

Typically, filter “dirty” condition occurs when the initial filter “clean”
readings have been increased by 125Pa.

If filter manometers, pressure switches or indicators have been fitted,
they should be set or adjusted to reflect the commissioned system
operation.

6.2 HEATING COILS LPHW

Observe the Flow and Return connection labels on the unit.
Drain and bleed valves are located on the coil (see fig 12).
Other valves may be required in the system pipe-work depending on
the installation (by others).

Where the wet system is at risk of frost damage, the addition of a
proprietary anti-freeze solution to the water is recommended.
Note that any frost protection offered by the unit’s integral control
system will not operate if the power supply to the unit is interrupted.

Piped connections should be made to the unit using appropriate
techniques, and all pipework must be independently supported.

No hot work is permitted within one metre of the unit.

Ensure that installed pipework runs do not prevent or restrict access
to the unit at any point.

The completed installation (including the connections within the unit,
as these may be disturbed during installation) shall be pressure tested
to the project engineer’s specification.

(This is a condition of the unit warranty).

6.3 FAN SECTIONS

Access to the fan section is via lift off panels. (see figs 1 & 13).

For non-Ecosmart units, wiring to the fan motor / unit terminal box
should be mechanically protected and in made in accordance with the
details on the motor name plate and diagram attached to the unit.

With the unit electrically isolated, rotate the fan impeller / drive
manually, checking that it spins freely.

Check all fixings are secure.

Units must not be operated without all access panels in place –
damage to equipment or injury to personnel may result.

Units must not be operated unless control interlocks are in place –
damage to equipment may result.

Test run motor for condition and correct rotation.

Check that the correct current overloads are fitted and that the
current being drawn does not exceed the motor nameplate value.
Excessive current normally indicates that the ductwork system
resistance is different to design.

6.4 ACCESS TO FAN UNIT

Access to the fan sections on the non control side and controls side of
the unit is shown in figure 1.
Access to the Dampers and actuators is shown in figure 1.

Condensate Alarm

The condensate pump incorporates an alarm function.
If the water level in the condensate tray exceeds a maximum
level (for example, as a result of the discharge tube becoming
blocked or frozen), the alarm contact will open. This contact is
internally connected to the heat exchanger bypass actuator,
and the unit will automatically be placed into bypass mode,
preventing further condensate production. Unit operation will
otherwise be unaffected.