CDH AMT AIRMASTER User manual

INSTALLATION MANUAL
The dehumidifier
has been designed and produced
to give many years of faultless operation,
but like every mechanical system
a correct installation and
regular maintenance are vital.
We reserve the right to change our products
without prior notice.
We can never be held responsible
for any errors and/or omissions in this manual.

Contents
COMPOSITION 5
HOUSING 5
IDENTIFICATION LABEL 5
COOLING CIRCUIT 5
FANS 6
FILTERS 6
SWITCHBOARD CABINET 6
WEIGHTS 6
OPTIONS 7
ACCESSORIES 8
DIMENSIONS 9
TRANSPORT AND UNPACKING 10
GENERAL 10
TRANSPORT 10
UNPACKING 10
REMOVING THE PALLET 10
TRANSPORT SCREWS 10
INSTALLATION DIRECTIONS 11
GENERAL 11
WORKING AREA 11
CONDENSATION DRAIN 11
WALL MOUNTING 12
INSTALLATION ON THE FLOOR 12
INSTALLATION EXAMPLE 13
CONNECTIONS 14
HOT WATER BATTERY 14
General 14
Hydraulic Connections 14
Control 14
ELECTRICAL HEATING 15
General 15
Supply 15
Control 15
Protection thermostat 15

ELECTRICAL DEFROST 15
General 15
Supply 15
SWIMMING POOL CONDENSER 16
General 16
Hydraulic Connection 16
Control 16
OUTDOOR CONDENSOR 17
General 17
Composition 17
Technical dates 17
Control 17
Cooling pipes 17
ELECTRICAL DATA AND SUPPLIES 18
POWER SUPPLY 18
General 18
Supply 18
Automatic system 18
CONTROLS 18
SWITCHBOARD CABINET 19
General 19
Connection terminals 19
Components 19
Connection diagram 19
PRINTING CIRCUIT BOARD 19
START UP, SAFETY REGULATIONS AND MAINTENANCE 20
START UP 20
General 20
Read out 20
Error codes 20
Reset 20
SAFETY REGULATIONS 21
Frost 21
Protection volume 21
Air flow 21
Intake and outlet 21
MAINTENANCE 21
Filters 21
Housing 21

FAILURES 22
UNIT DOES NOT WORK 22
UNIT RUNS CONTINUOUSLY 22
UNIT WORKS BUT DOES NOT DEHUMIDIFY OR INADEQUATE 23
OTHER FAILURES 23

AMT 12_00 5
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Combination of synthetic (PE) sides and zinc plate front and top panel, painted in textured RAL 9001 (other RAL-
colours optional available Order code: see price list).
Fitted with a curved anodised aluminium grate.
Sound-absorbing and flame extinguishing 25 mm thick insulation (NEN-EN 13501-1:2002).
I
ID DE EN NT TI IF FI IC CA AT TI IO ON N L LA AB BE EL L
Each unit bears a self-adhesive identification label on the small support on the left side in the unit.
This label mentions besides the type of unit, its serial number and technical data.
NEVER REMOVE THE IDENTIFICATION LABEL: THE GUARANTEE WILL EXPIRE.
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CO OO OL LI IN NG G C CI IR RC CU UI IT T
Hermetically sealed compressor with R407C, vibration-free fitted and cooled with suction gas
Evaporator and condenser battery with copper pipes (3/8”) with pressed-on aluminium plates, coated with
epoxy varnish
ABS condensation tank
Expansion valve with distribution head for several injections.
Combi-dryer: combination of filter, dryer, sight-glass and liquid reservoir (except AMT40).
High and low pressure thermostats
Electronic control with shut-off at LP, HP, TC and TF *
* LP = low pressure HP = high pressure TC = thermal contact compressor TF = thermal contact fan
The cooling circuit is pre-filled with Forane 407C, which is a CFC-free coolant which does not damage the ozone
layer and does not influence the breeches shaft effect.
The diagram below shows the composition of one cooling circuit and optional swimming pool condenser, indicating
the different components.
(1) Compressor
(2) Evaporator
(3) Condenser
(4) Expansion valve
(5) Combi dryer
(6) Sight-glass
(7) HP pressure gauge
(8) LP pressure gauge
(K) Swimming pool condenser
COOLING CIRCUITS WITH OUTSIDE CONDENSERS ARE SEALED
AND ARE FILLED WITH NITROGEN IN THE FACTORY.
AFTER ASSEMBLY THEY SHOULD BE FILLED WITH FORANE R407C.
CAUTION: THEY ARE PRESSURIZED.

6 AMT 12_00
F
FA AN NS S
One or two (on one deck mounted) directly driven fan(s) with a galvanized housing and wheel, with blades bent
forward.
Type of unit
Fan
Number
Air flow rate
Current
40
D4E 146-AA 07-36
1
400 m³/h
0,44 A
65
D4E 146-AA 07-36
1
650 m³/h
0,44 A
92M-100
D4E 146-AA 07-36
2
940 m³/h
2 x 0,44 A
140-142M
DP 6-6-14 1/3 SB
1
1400 m³/h
1,9 A
F
FI IL LT TE ER RS S
One flat dust filter in the suction-side .
Composition
Synthetic fibres stiffed with supporting wire gauze, in a galvanized frame.
Class EU2
Gravimetric efficiency > 65 < 80 %
Filter dimensions per type
Type of unit
Filter dimensions
Order code
40
275 x 405
AP 99 40 20
65
295 x 695
AP 99 40 21
92M
295 x 695
AP 99 40 21
140-142M
305 x 895
AP 99 40 22
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SW WI IT TC CH HB BO OA AR RD D C CA AB BI IN NE ET T
The switchboard cabinet is built inside the unit, when removing the housing on the right side.
Completely pre-wired according CE standards..
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WE EI IG GH HT TS S
Weights are net weights of basic units.
Weight of options – combined or not – are not added.
Type of unit
Weight in kg
40
53
65
72
92M
77
140-142M
115

AMT 12_00 7
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OP PT TI IO ON NS S
OPTION RAL COLOUR
Housing in a RAL-colour, different than the standard RAL 9001 colour.
CLOSED FEET
Set closed feet in zinc plate, standard painted in textured RAL 9001.
OPTION RAL COLOUR CLOSED FEET
Set closed feet in a RAL-colour, different than the standard RAL 9001 colour.
WALL MOUNTING SET
For vibration-free mounting of the unit against the wall.
BOTTOM GRATE
A flat anodised aluminium grate, to be applied when the unit is hung at such a height that the bottom is visible -
see also installation prescriptions.
REPLACEMENT FILTER
Air filter to replace soiled or worn filter
LPHW (HOT WATER BATTERY)
BUILT-IN THREE WAY VALVE
ELECTRICAL HEATING
ELECTRICAL DEFROST
SWIMMING POOL CONDENSER
OUTDOOR CONDENSER

8 AMT 12_00
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AC CC CE ES SS SO OR RI IE ES S
HYGROSTAT
Wall mounted model: control of the dehumidifier
HYGROSTAT CONNECTION TO SEVERAL UNITS
To be used when several AMT units are installed in the same room.
HYGROTHERMOSTAT
Wall mounted model: control of dehumidifiers with heating
HYGROTHERMOSTAT CONNECTION TO SEVERAL UNITS
To be used when several AMT units with heating are installed in the same room
MINIMUM BUILT-IN THERMOSTAT
Built-in thermostat for minimum temperature limitation or control of electrical defrost
MAXIMUM BUILT-IN THERMOSTAT
Built-in thermostat with gold contacts for maximum temperature limitation or control of the swimming pool
condenser.
To guarantee an optimal operation (continuous measuring) we recommend that the fan runs continuous
= bridge 7 and 8).
CLOCK THERMOSTAT
Thermostat with week clock for night lowering in combination with hygrostat.
Can only be applied when the swimming pool is covered.
CONDENSATION PUMP
If the air dryer is placed lower than the sewage level.
Synthetic collector tank fitted with float and pump (2 l/min, 3 m lift)

AMT 12_00 9
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B
Y
C
C
Y
B
E
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DI IM ME EN NS SI IO ON NS S
Type of unit
L (mm)
D (mm)
H (mm)
B
C
Y
40
980
310
570
∅½”
-
∅22
65-92M-100
1305
350
680
∅½”
∅15
∅22
140-142M
1505
350
680
∅½”
∅15
∅22
B = L.P.H.W.
C = coaxial condensor
Y= condensation drain
E = Electrical connections

10 AMT 12_00
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GE EN NE ER RA AL L
The units are separately packed in cardboard boxes, on one pallet tied with tape.
To prevent damage to the unit, it is recommended that the unit is transported to its final destination IN its packing.
When the unit is stored temporarily, it must be stored in a dry place until transport to its final destination
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TR RA AN NS SP PO OR RT T
Smaller units can usually be moved by manpower and/or using a trolley.
To move larger units, a forklift should be used.
The units are always supplied on a pallet: please leave this in place until the final destination.
To prevent damage, note the following:
When using a forklift, ensure that the forks are long enough to reach to the end of the pallet.
When using a forklift the unit should only be lifted with the pallet or reinforcement under the unit.
Pushing with the forklift is permitted only if a rigid plank or reinforcement is applied over the complete length of
the unit.
The units should always be transported the right way up. Although under some circumstances they have to be
transported flat, e.g. to clear a narrow passage, they should never be placed flat for transport in trucks or for long
term storage (> 12 hours).
If the units must be moved in another way, other precautions must be taken to prevent damage to the housing.
IGNORING THESE GUIDELINES CAN CAUSE DAMAGE
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UN NP PA AC CK KI IN NG G
When cutting the packaging always avoid damage to the unit.
Plastic, cardboard and wood should be removed separately for later recycling.
ON RECEIPT OF THE UNIT ensure that no transport damage has occurred.
The carrier must be informed of any damage immediately in writing
ALWAYS DETERMINE WHERE THE UNIT IS TO BE INSTALLED.
ENSURE THAT THE UNIT WILL LATER BE EASILY ACCESSIBLE FOR MAINTENANCE
(SEE WORKING SPACE).
R
RE EM MO OV VI IN NG G T TH HE E P PA AL LL LE ET T
When the equipment has reached its final destination, it can be removed from the pallet.
No specific instructions can be given here, as this action depends on the size of the unit and the room.
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TR RA AN NS SP PO OR RT T S SC CR RE EW WS S
THE RED MARKED TRANSPORT SCREWS OF THE COMPRESSOR - NOT ON AMT40 -
HAVE TO BE REMOVED ON INSTALLATION.

AMT 12_00 11
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Supporting material must be sufficiently strong
To prevent resonance, make best use of sound insulating material – see wall mounting kit.
Fitting or attaching the unit to wooden floors or walls is not recommended. This requires special precautions
(anti-rumble materials).
The units must always be levelled.
The units may only be installed one way up in a way that the compressor is always upright.
The suction of the unit should be at least 2,5 m from the water surface (protection volume – directions ARAI).
IGNORING THESE GUIDELINES CAN CAUSE DAMAGE
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WO OR RK KI IN NG G A AR RE EA A
On installation of the unit, ensure there is sufficient space to allow practical and safe maintenance to the unit: front
side of the unit. However, electrical and hydraulic connections have to be done through the side of the unit
(minimum 100 cm working space).
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CO ON ND DE EN NS SA AT TI IO ON N D DR RA AI IN N
The condensation drain is connected via the bottom or via the back of the unit.
The condensation outlet is a 22 ∅mm flexible hose which must be connected to a PVC outlet pipe ∅32 mm, ideally
fitted with an odour trap (siphon).
To prevent water splashing into the unit and any undesirable odours, the connection must be made airtight to
prevent the intake of air via the outlet.
If the unit is placed below the drain level, the condensation pump may be used with a collector tank and float to
evacuate the water: flow 2 l/min and 3 m lift.
ATTENTION: THE CONDENSATION DRAIN MUST BE POSITIONED FROST-FREE.

12 AMT 12_00
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WA AL LL L M MO OU UN NT TI IN NG G
If you are mounting the unit against the wall, we advise following directions:
leaving a clearance of minimum 20 cm (*) from the floor – thus assuring enough air flow at the suction side
- and minimum 1 m from the ceiling, thus avoiding that the unit will re-suck its own dried air.
In order to ensure a proper air circulation above the floor, we advise never to mount the unit more than 1 m
above the floor.
For vibration-free mounting of the unit you can use an optional:
WALL MOUNTING SET 
1 SET = 2 (AMT40/65//92M/100) or 3 (AMT140/142M) screw bolts with rubber vibration damper and plug
+2 (or 3) distance tubes with rubber vibration damper.
When using this wall mounting set the unit will be mounted 20 mm from the wall: the front side can easily be
lifted when cleaning/replacing the filter
ATTENTION
WHILE MOUNTING, CAREFULLY SEE TO IT THAT THE RUBBER DAMPER IS NEVER USED
AS AN AID TO FORCE A TOOL UPON.
WRONG MOUNTING WILL RESULT IN EXTRA TENSION/CHARGE ON THE DAMPER WHICH CAN CAUSE
CRACKS. THE LOAD BEARING CAPACITY OF THE DAMPER WILL NO LONGER BE GUARANTEED:
THE DAMPER CAN TEAR OUT AND THE UNIT MAY FALL OFF THE WALL.
If the bottom of the unit is visible, you can fit (always supplied separately) a bottom grate 
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IN NS ST TA AL LL LA AT TI IO ON N O ON N T TH HE E F FL LO OO OR R
Can be mounted on the floor when using optional 20 cm (*) high closed feet..
Place the unit on the feet and screw it down with the bolts and nuts that are supplied with the feet.
When the unit has been screwed down to the feet it can be lifted and put in its final position.
ATTENTION: make sure that the cables are not jammed between the back wall, bottom or feet.
Electrical cables and - if you are using flexible connections - pipes for heating and any swimming pool condenser
can be passed through the feet.
For freestanding mounting, the unit should be protected against pulling over.
The unit can be levelled by screwing the levelling screws on the bottom of the front side of the unit in or out.

AMT 12_00 13
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IN NS ST TA AL LL LA AT TI IO ON N E EX XA AM MP PL LE E
A
Installation with 1 AMT
B
Installation with 2 AMT
A
B
B

14 AMT 12_00
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HO OT T W WA AT TE ER R B BA AT TT TE ER RY Y
GENERAL
Type of unit
40
65
92M-100
140-142M
Nominal output *
kW
3,5
7
9
13
Nominal flow
l/h
136
277
356
517
Pressure loss
kPa
0,7
1,68
2,64
5,94
* At 80/60°C WT° and 20°C LT°
Used to keep the ambient area to temperature or bring this to temperature depending on capacity.
The hot-water battery (LPHW) is fitted on the pulse side of the unit.
The connection of the LPHW is on the left of the unit.
The LPHW must be connected to the CH boiler by a registered installer. The unit is not fitted with a circulating
pump. This must be fitted by the CH fitter and adapted to the capacity of the LPHW. The incorporated control can
be used to control the circulating pump and/or the CH boiler.
The unit can also optionally be equipped with a three-way valve 
HYDRAULIC CONNECTIONS
Fitted with ½” nipple connection to the LPHW.
The optional three-way valve is ½” external.
On the LPHW, the IN and OUT are marked LPHW IN and LPHW OUT
CONTROL
ELECTRICAL CONNECTIONS/ SEE DIAGRAM
The LPHW is controlled independently of the CH via the built-in 24V = control. When the dehumidifier functions, the
fan also moves air over the LPHW.
The thermostat (TH) or hygrothermostat (HYTH) orders the unit control to provide heat. The fan and circulation
pump are controlled by the PCB. A non-return valve should be fitted in the hydraulic circuit.
In order to prevent hot water flowing through when the swimming pool area is on temperature, one can apply a
built-in three-way valve.
ADVANTAGE: on heat demand, the three-way valve opens and water flows directly through the LPHW,
immediately providing heat.
WHEN REORDERED PLEASE GIVE TYPE OF UNIT AND CAPACITY OF LPHW.

AMT 12_00 15
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GENERAL
Type of unit
40
65
92M-100
140-142M
Output
kW
3
3
3 - 6
6
Used to keep the ambient area to temperature or bring this to temperature, depending on capacity of the heating
resistors.
Composed of reinforced resistors of 1, 1,5 or 2 kW RUS321 with ribs of galvanised steel.
Including one-stage control with run-on delay on the fan and excess temperature protection.
SUPPLY
We recommend always providing a separate supply for the electrical heating.
3 kW
3 kW
6 kW
6 kW
Control stages
1
Voltage
V
230
3 x 400+N
230
3 x 400+N
Nominal
A/ph
13
4,33
26
8,8
To be provided
Automatic fuse
A
2P 20A
4P 20A
2P 40A
4P 20A
CONTROL
ELECTRICAL CONNECTIONS/ SEE DIAGRAM
Via the thermostat or hygrothermostat the unit control is ordered to heat: the fan comes in as well as the one-
stage control
PROTECTION THERMOSTAT
The resistors are always fitted with a safety thermostat which disconnects the resistors when the air temperature
exceeds 85°C.
The resistors can only be reconnected when the temperature has dropped and the unit has been reset.
The resetting must be done manually.
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EL LE EC CT TR RI IC CA AL L D DE EF FR RO OS ST T
GENERAL
When the ambient temperature falls below 10°C (minimum standard working range), an electrical defrost cycle
(option DE) can be used with extra defrost resistors. Minimum working range will be 3°C.
SUPPLY
We recommend always providing a separate supply for the electrical defrost.
1,5 kW
Voltage
V
230
Nominal
A
9
Te be provided
Automatic fuse
2P 20A

16 AMT 12_00
2
1
3
3
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GENERAL
Makes sure that the unit will keep working at a higher ambient temperature than the standard value – see technical
specifications – and discharges the surplus heat to the swimming pool water.
HYDRAULIC CONNECTION
If the unit is fitted with a swimming pool condenser, this must be connected via a bypass or a separate pump to the
return circuit line from the filter installation.
CONNECTION OF THE POOL CONDENSER HAS TO BE EXECUTED
B E F O R E
CONNECTION TO THE WATER TREATMENT INSTALLATION (CHEMICAL OR ELECTROLYTIC).
(1) Filter installation
(2) Throttling valve
(3) Shut-off cock
(C) Swimming pool condenser
The IN and OUT are marked COAX IN and COAX OUT.
The throttling valve must be turned such that the temperature difference between IN and OUT is ±8°C.
We recommend using a heat- and pressure-resistant line for the first 3 m (eg: PEX).
Type of unit
65
100-102M
140-142M
Capacity
kW
3,62
4,66
6,63
Air flow
L/h
400
550
660
Pressure loss
kPa
8,5
15
21
CONTROL
ELECTRICAL CONNECTIONS/ SEE DIAGRAM
Via the maximum built-in thermostat : at excess temperature (> 32°C) the unit control can be ordered to emit
extra heat. The extra heat is diverted into the swimming pool water and the temperature of the expelled air is equal
to that of the air drawn in.