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4 - COMPONENTS
4.1 - Fan motors LEC
4.1.1 - Procedure for dismantling of the motor (Fig. 12)
CAUTION: Before any intervention on this product, it is
imperative to cut the power supply to the unit.
In the case of malfunctioning of the fan motor, the complete
assembly of the fan motor must be dismantled and replaced:
- Unhook the ATM from its suspension support by following
the procedure indicated (See 3.3 – Procedure for dismantling
of the ATM).
- Open the filter access door (Fig. 12a).
- Unscrew and then remove the side plate (Fig.12.b) of the
ATM fixed with Torx T20 star screws (side opposite to the
non-removable plate).
- Disconnect the power supply cables of the fan motor (quick
power and control connectors).
- The fan motor is fixed to the unit with Torx T20 star screws,
unscrew these screws from the outside. (Fig.12c).
- Remove the fan motor (Fig.12d) from the side of the removed
plate.
- Replace the fan motor and proceed with reassembly by
applying the procedure in reverse order.
NOTE: Be careful not to touch the turbines while dismantling
the fan motor, balancing may be adversely affected.
- In the case of an optional electric battery:
On 42GR ATM Size 19: the electric battery is located in the
suction eye of the fan motor. Unscrew the electric battery
support in order to isolate the fan motor.
On 42GR ATM Size 29: the electric battery is placed in the
discharge suction eye of the fan motor. Mark the number of
components connected to the electric battery, and then
disconnect these electric wires as well as the quick power
supply connector from the electric battery. Do not let the wires
touch each other. Then, lift the electric battery from its support
from the outside in order to reach the fixing screws of the fan
motor.
- Remove the fan motor (Fig.12d) from the side of the removed
plate.
- Replace the fan motor and proceed with reassembly by
applying the procedure in the reverse order.
4.1.2 - Fan cabling
4.1.2.1 - Variable speed LEC - naked wires
See Fig.13.
4.1.2.2 - Variable speed LEC - NTC regulator (optional)
The electrical connection to a 230 V AC supply of the fan motor
as well as that of the 0-10V DC control signal are made in the
factory in the NTC regulator.
CAUTION: For the supply of the NTC, the connection of the
various inlets / outlets and the adjustment of the regulator:
refer to the installation and operation manual of the NTC.
4.2 - Optional electric battery
CAUTION: Before any intervention, it is imperative to cut the
electrical power supply of the unit.
In the case of malfunctioning of the electric battery the latter must
be replaced. This replacement procedure is slightly different
depending on the size of the 42GR ATM: Size 19 or 29.
IMPORTANT: When the electric battery is powered, do not
touch the metallic components which are turned on.
4.2.1 - Procedure for replacement of the electric
battery - 42GR ATM Size 19 (Fig. 14)
For the Size 19 42GR ATM, the electric battery is located in the
suction eye of the fan motor.
CAUTION: Before any intervention on this product, it is
imperative to cut the electrical power supply of the unit.
- Unhook the ATM from its suspension support by following
the procedure indicated (See 3.3 – Procedure for dismantling
the ATM).
- Open the filter access door (Fig. 12a).
- Unscrew and then remove the side plate of the ATM fixed
with Torx T20 star screws (side opposite to the non-removable
plate) (Fig.14a).
- Mark the number of components connected to the electric
battery, and then disconnect these electric wires as well as
the quick power supply connector from the electric battery.
Do not let the wires touch each other.
- Unscrew the fixing screws from the electric battery support
(Fig.14b).
- Remove the electric battery (Fig. 14c) from its support.
- Replace the electric battery and proceed with reassembly by
applying the procedure in the reverse order.
4.2.2 - Procedure with replacement of the electric
battery - 42GR ATM Size 29 (Fig. 15)
For the size 29 42GR ATM, the electric battery is placed in
discharge suction eye of the fan motor.
- Unhook the ATM from its suspension support by following
the procedure indicated (See 3.3 - Procedure for dismantling
the ATM).
- Mark the number of components connected to the electric
battery, and then disconnect these electric wires as well as
the quick power supply connector from the electric battery.
Do not let the wires touch each other.
- Remove the electric battery (Fig. 15a) from its support
(Fig.15b).
- Replace the electric battery and proceed with reassembly by
applying the procedure in the reverse order.
CAUTION: The Carrier type B and D electronic thermostats
are provide with an 8 Amps electric battery relay. Carrier
requires an additional protective relay for the electric coils
above 1600 Watts.
CAUTION: In case of regulator provided by the customer,
Carrier recommends the installation of an additional
protective relay corresponding to the capacity of the electric
battery.
4.3 - Water coils
4.3.1 - Procedure for dismantling the water battery
(Fig. 16)
CAUTION: Before any intervention, it is imperative to cut
electrical power supply to the device.
- Unhook the ATM from its support by following the procedure
indicated (See 3.3 – Procedure for dismantling the ATM).
- Open the filter access door (Fig. 16a) and remove the filter.
Mark the direction of the filter: the side with the seal is
positioned against the inner plate of the ATM.
- Unscrew the side plate of the ATM (Fig. 16b) fixed with Torx
T20 star screws (side opposite to the non-removable plate).
- Remove the valve casings (Fig. 16c) fixed with Torx T20 star
fixing screws.
- Disconnect the hydraulic hoses by unscrewing the G 1/2"
rotating nuts. Drain the water from the battery into a container.
- Disconnect the servomotors taking care to mark the cold and
hot valves.
- Remove the 2-channel or 3-channel water flow regulator
valve body. Depending on the adjustment of the device, the
coupling of the 3-channel valve can be provided with a hot/
cold reverser, do not dismantle it.
15
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