MTD 400 Manuel de service télécharger pdf (Page 33)

33GB 01/2009 AWR MTD - AWR MTD/B

CHECKING AND STARTING UP THE UNIT

PREPARING FOR FIRST START UP

The unit must be started up for the first time by the Techni-

cal Service: Before starting up the units, make sure that:

- All safety conditions have been respected;

- The unit is adequately fixed to the surface it rests on

- Functional distances have been respected;

- Water connections have been carried out as indicated in

the instruction manual;

- The water circuit is filled and vented. When draining after

heat pump operation, take care as the water may be hot;

- The water valves are open;

- Electrical connections have been carried out correctly

- Voltage is within a tolerance of 10% of the rated voltage

for the unit;

- The unit is correctly earthed;

- All electrical connections are tight and all water connec-

tions have been carried out correctly.

The unit must be started up for the first time with stan-

dard settings. Set Point values may be modified only

after testing has been completed.

Before starting up, power up the unit for at least two

hours by switching QF1 and QS1 to ON (see wiring dia-

gram) and the control panel “HSW11” to OFF (message

“off”) to allow the oil in the compressor sump to heat up.

STARTING UP FOR THE FIRST TIME (after two hours)

Before starting the unit:

- Make sure the switch QF1 is in the OFF

position.

- Make sure the contact of the on/off device

SA1 (see the wiring diagram) is open (if

featured).

- Make sure the remote keypad “A4” (see wiring diagram)

shows OFF (if featured).

- Close the door of the electrical panel.

- Move the main unit switch QS1 to the ON

position;.

- Move the switch QF1 (outside the unit) to

“ON”.

- The message ON is shown on the control panel HSW11,

indicating power is connected.

For the position of internal components, see the dia-

grams.

ACTIVATING AND DEACTIVATING THE UNIT

- Move the contact on the on/off device SA1

(if featured) to ON.

- Switch the remote keypad “A4” (if fea-

tured) ON.

- The COOLING and HEATING are ACTI-

VATED and DEACTIVATED on the control

panel “HSW11” or the remote keypad “A4”

if featured.

During this phase, if the following indications appear on

the display, follow the instructions:

- ER20 check the water flow-rate and the connection (16

and 17) of the flow switch or differential pressure

switch.

- ER01 (three-phase heat pumps only): check the power

supply connection and if necessary reverse two phas-

es.

To access the control panel, open the door:

- remove the screw 1;

- press the points 2 simultaneously and lift the door 3.

At every change of season, make sure the operating

conditions fall within the limits specified.

Make sure the current input of the compressor is less

than the maximum shown in the table of technical speci-

fications.

In three-phase models, check that the noise levels of

the compressor are not abnormal. If this is the case,

reverse one phase.

Make sure the voltage is within the established limits and

that, for three phase units, the unbalance between the

phases is less than 3%.

Check that the cover is closed again following the setting

procedure.

OFF

set

esc

OFF

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MTD 400 Manuel de service Page 33

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