AERMEC ANK, Installation Manual

7

  

5. OPERATION  

5.1. 

SET POINT IN COOLING MODE. PARAMETER 1STF

 

(factory

 

set)=7°C/44.9°F,

 ∆

t=9°C.

  

5.2. 

SET POINT IN HEATING MODE. PARAMETER 3STC

 

(factory

 

set)

 

=

 

45C/113°F,

 ∆

t

 

=

 

9°C.

  

If

 

the

 

unit

 

power

 

supply

 

is

 

restored

 

after

 

a

 

temporary

 

interruption,

 

the

 

set

 

mode

 

will

 

be

 

kept

 

in

 

the

 

memory.

 

5.3. 

COMPRESSOR START-UP DELAY

 

Two

 

functions

 

have

 

been

 

prepared

 

to

 

prevent

 

compressor

 

start

‐

ups

 

that

 

are

 

too

 

close.

  

‐ 

 

Minimum

 

time

  

from

 

last

 

switch

‐

off

 

180

 

seconds.

 

‐ 

 

Minimum

 

time

  

from

 

last

 

switch

‐

on

 

300

 

seconds.

 

5.4. CIRCULATION PUMP 

The

 

circuit

 

board

 

delivers

 

an

 

output

 

for

 

pump

 

management,

 

which

 

starts

 

on

 

commissioning

 

and

 

remains

 

on

 

for

 

at

 

least

 

150

 

seconds

 

and

 

controls

 

the

 

state

 

of

 

the

 

probes.

 

After

 

the

 

first

 

40

 

seconds

 

of

 

pump

 

operation

 

the

 

water

 

flow

 

switch

 

closes

 

and

 

the

 

unit

 

starts,

 

when

 

the

 

water

 

flow

 

rate

 

is

 

in

 

normal

 

working

 

conditions,

 

the

 

water

 

flow

 

rate

 

alarm

 

functions

 

are

 

acti

‐

vated

 

(differential

 

pressure

 

switch

  

or

 

flow

 

meter).

 

When

 

the

 

ma

‐

chine

 

enters

 

stand

‐

by

 

mode,

 

the

 

pump

 

remains

 

on

 

for

 

30

 

sec

 

and

 

controls

 

the

 

flow

 

meter

 

or

 

the

 

pressure

 

switch

 

5.5. 

FAN SPEED CONTROL

 

DCPX ACCESSORY 

COOLING OPERATION AT LOW AMBIENT CONDITIONS 

AND HEATING OPERATION AT HIGH AMBIENT CONDI-

TIONS. 

To

 

allow

 

correct

 

functioning

 

of

 

the

 

unit

 

at

 

different

 

external

 

tem

‐

peratures,

 

the

 

MODUCONTROL

 

by

 

reading

 

the

 

pressure

 

via

 

the

 

pressure

 

probe,

 

controls

 

the

 

rotation

 

speed

 

of

 

the

 

fans,

  

thus

 

allow

‐

ing

 

to

 

increase

 

and/or

 

decrease

 

heat

 

exchange,

 

keeping

 

the

  

con

‐

densation

 

or

  

evaporation

  

pressures

 

more

 

or

 

less

 

constant.

 

The

 

fan

 

functions

 

independently

 

with

 

respect

 

to

 

the

 

compressor.

 

Remem

‐

ber

 

that

 

the

 

DCPX

 

is

 

mandatory

 

for

 

the

 

production

 

of

 

DHW.

 

And

 

cooling

 

below

 

20°C/68°F.

 

5.6. ANTI-FREEZE ALARM 

The

 

anti

‐

freeze

 

alarm

 

is

 

never

 

active

 

if

 

the

 

machine

 

is

 

off

 

or

 

in

 

stand

‐

by

 

mode.

 

In

 

order

 

to

 

prevent

 

breakage

 

of

 

the

 

plate

 

heat

 

exchanger

 

due

 

to

 

freezing

 

of

 

the

 

water

 

it

 

contains,

 

the

 

MODUCONTROL

  

stops

 

the

 

compressor

 

if

 

the

 

temperature

 

detected

 

by

 

the

 

probe

 

postioned

 

at

 

the

 

outlet

 

of

 

the

 

heat

 

exchanger

 

and

 

in

 

inlet

 

to

 

the

 

chiller

 

is

 

below

 

+4°C/39°F.

  

THIS

 

ANTI

‐

FREEZE

 

SET

 

TEMPERATURE

 

CAN

 

ONLY

 

BE

 

VARIED

 

BY

 

AN

 

AUTHORISED

 

AFTER

‐

SALES

 

CENTRE

 

AND

 

ONLY

 

AFTER

 

HAVING

 

CHECKED

 

THAT

 

THERE

 

IS

 

ANTI

‐

FREEZE

 

SOLUTION

 

IN

 

THE

 

WATER

 

SYSTEM.

 

The

 

intervention

 

of

 

this

 

alarm

 

determines

 

compressor

 

stop

 

and

 

not

 

pump

 

block,

 

which

 

remains

 

active

 

along

 

with

 

the

 

switch

‐

on

 

of

 

the

 

resistance

 

if

 

installed.

 

To

 

restore

 

normal

 

functions

 

the

 

tem

‐ 

9.

 

The

 

voltage

 

is

 

within

 

the

 

tolerance

 

of

 

10%

 

of

 

the

 

unit

 

nominal

 

value

 

10.

 

Earthing

 

is

 

correctly

 

made.

 

All

 

electric

 

and

 

hydraulic

 

connections

 

are

 

correctly

 

tightened.

 

4.2. MACHINE COMMISSIONING 

‐ 

Close

 

the

 

electric

 

control

 

board

 

hatch.

 

‐ 

Position

 

the

 

appliance

 

master

 

switch

 

at

 

ON.

 

‐

Make

 

sure

 

that

 

the

 

auxiliary

 

switch

 

contact

 

(IA)

 

 

(see

 

wiring

 

diagram)

 

is

 

open

 

(if

 

used,

 

and

 

the

 

display

 

LED

 

(I)A

 

must

 

be

 

off.

 

‐

Press

 

the

 

ON

 

key

 

for

 

3

 

sec

 

to

 

switch

 

the

 

machine

 

on.

 

4.3. SEASON CHANGEOVER, OPERATION PARAMETERS 

‐ 

For

 

every

 

season

 

change,

 

check

 

that

 

the

 

functioning

 

limits

 

lie

 

within

 

the

 

proper

 

limits.

 

‐ 

Check

 

that

 

the

 

compressor

 

input

 

current

 

is

 

lower

 

than

 

the

 

maximum

 

indicated

 

in

 

the

 

technical

 

data

 

table.

 

‐ 

Make

 

sure

 

that

 

the

 

voltage

 

value

 

lies

 

within

 

the

 

pre

‐

fixed

 

limits

 

and

 

that

 

unbalance

 

between

 

the

 

three

 

phases

 

(three

‐

phase

 

power

 

supply)

 

is

 

not

 

above

 

3%.

 

SEASON CHANGEOVER FROM PANEL ON MACHINE 

Access

 

the

 

USER

 

SET

 

list

 

by

 

touching

 

the

         

insert

 

password

 

key

 

000

 

(already

 

displayed);

 

just

 

confirm

 

by

 

re

‐

pressing

 

the

 

key

       

The

 

parameter

 

affected

 

is

 

the

 

Sta,

 

changing

 

the

 

value

 

0

 

and

 

1

 

will

 

change

 

the

 

operation

 

from

 

cooling

 

to

 

heating

 

accordingly.

 

For

 

further

 

informa

‐

tion

 

refer

 

to

 

the

 

USER

 

MANUAL

 

SEASON CHANGEOVER FROM PR3 

Just

 

act

 

directly

 

on

 

the

 

switch.

 

The

 

machine

 

switches

 

off

 

automatically

‐

and

 

switches

 

back

‐

on

 

with

 

the

 

selected

 

functioning

 

mode.

 

Advance

 

based

 

on

 

the

 

timeframe

 

for

 

the

 

completion

 

of

 

works

  

for

 

the

 

system.

 

Prior

 

to

 

the

 

work

 

to

 

be

 

carried

 

out

 

by

 

the

 

AERMEC

 

service

 

personnel,

 

all

 

other

 

works

 

(electrical

 

and

 

hydraulic

 

hook

‐

ups,

 

priming

 

and

 

bleeding

 

of

 

air

 

from

 

the

 

system)

 

must

 

have

 

been

 

completed.