Carrier Idrofan 42GR ATM, Installation Instructions Manual, Page: 13 / 20

3 - INSTALLATION OF THE UNIT
3.1 - Procedure for installation
3.1.1 - Introduction
42GR ATMs are designed to be installed in a technical service
room in the centre of the space to be treated. They are arranged
side by side and their very high pressure provided enables them
to operate with large duct networks.
42GR ATMs are composed of 3 main components to be installed
in the following order (Fig.4):
-
The attachment rail: Fig.4a
-
The suspension box: Fig.4b
-
The air treatment module (ATM): Fig.4c
The assembly instructions for each component are explained
below.
3.1.2 - Attachment rail
Fix the attachment rail firmly into the concrete slab overhanging
the technical room. The attachment rail drawing is detailed in Fig.5.
It makes it possible to receive the suspension box for the support
of the ATM. It is supplied as packages of 5 rails of two metres.
The assembly makes it possible to suspend 40 size 1 or 23 size
2 ATMs. The rails can be cut to the required length.
3.1.3 - Suspension box
CAUTION: The suspension boxes cannot be dismantled at
all, once they are installed, sheathed and if the false ceiling
of the technical rooms is closed.
PRECAUTIONS FOR INSTALLATION: During installation of
the unit, ensure that any construction debris which has
remained in the ducts cannot damage the unit.
-
Attach the suspension box to the attachment rail in order
to support the ATM and to ensure the bulkhead connection
of the technical room (Fig.6b). The suspension box comprises
an uninsulated plenum consisting of ferrules, one for the air
recirculated (Fig.6g) and one for the air blown (Fig.6h). In
accordance with the mandatory requirements for sound
levels, silencers may be provided.
-
Complete the ventilation connections for the suspension
box (blowing and recirculation of air). Ensure that the insides
of the ducts are clean to avoid the movement of construction
debris which could damage the mechanical parts of the
system such as the fan turbine or the thermostat component
of the diffuser.
CAUTION: Load losses in the ducts must be compatible with
the performance of the device. The duct must be as taut as
possible. Avoid sharp bends. Check that the ducts have no
air leaks and that they are not overburdened.
-
Prepare the hydraulic system with installation of collectors
and stop valves in standby position on the various spurs.
Sufficient clearance will have been provided for the assembly
and dismantling of the ATMs as well as for maintenance of
the filters through the filter access door (Fig.6c).
3.1.4 - Air treatment module (ATM)
CAUTION: Never lift the ATM by using exposed pipes, valves/
hoses, electrical wiring harnesses, or condensate drains.
-
Fix the ATM to the suspension box
. For this, it must be
attached to the suspension hook (Fig.6j); then push the ATM
against the box. This will cause crushing of the seal located
between the box and the ATM and locking of the latch hook
(Fig.6i). Then connect the hydraulic hoses.
-
Connect the condensate drains of the ATM (Fig.7) using
a fastener for flexible tube of inner ø 16 mm
(Fig.7a). To avoid the emergence of odour, it is MANDATORY
to install a siphon of at least 100 mm on each ATM (for
example yoke with the condensate drainage tube) (Fig.7b).
Make a slope of 20mm/m on the common drain pipe (Fig.7c)
without blip or lifting.
-
Connect the hydraulic hoses between the stop valves of
the collectors and the water inlet(s)/ outlet(s) of the 42GR
ATM (Carrier recommends the use of hydraulic hoses which
can be supplied as accessories). Each hose is provided with
a G1/2” rotating nut depending on the model. Do not forget
to insert a seal between the rotating nut and the stop valve
(seal not supplied by Carrier).
-
When all the units are installed, open the stop valves located
on the collectors, purge the circuits, and then pressurize. To
purge the coils: slightly loosen the vent screws. The
installation can then operate.
NOTE: Do not turn on unless all the 42GR ATM are connected
and earthed.
3.2 - Connection of fresh air
Fresh air (optional) can be connected either to the suspension
box or to the ATM depending on the adjustment selected.
3.2.1 - Fresh air to suspension box
3.2.1.1 - Case of the constant fresh air flow suspension
box (fig. 8)
This multipurpose box is provided to receive the regulators for
constant fresh air flow (See 4.5.1 – Regulator for constant fresh
air flow). The use of this box enables the treatment of fresh air
through the battery and the filter of the ATM.
This box is provided with a ferrule for connection and a flexible
duct of maximum length 700 mm ø 160 mm.
3.2.1.2 - Case of the variable fresh air flow suspension box
(fig. 9)
The use of this box enables the treatment of fresh air through the
battery of the ATM. This fresh air flow can be adjusted using the
Carrier regulator (See 4.5.2 – Regulator for variable fresh air flow).
This box is provided with duct connection. Carrier recommends
the installation of a semi-rigid circular cross-section duct of 250
mm length and a minimum static pressure of 180 Pa upstream of
the fresh air flow regulator.
3.2.1.3 - Case of the standard suspension box (fig. 10)
In this adjustment, the box does not have a fresh air inlet. However,
fresh air intake can be ensured through the air treatment module
(ATM) (See 3.2.2 – Fresh air in ATM).
3.2.2 - Fresh air in ATM (Fig 11)
Fresh air is connected to the ATM through the fan access door
(Fig.11c). Three adjustments of the fresh air flow are possible:
-
Only ferrule for connection ø 125 mm (without fresh air flow
regulator), air duct provided.
-
Ferrule for connection with fixed constant fresh air flow
regulator (See 4.5.1.1 –Fixed constant fresh air flow
regulator). This latter is inserted into a flexible duct of
maximum length 450 mm ø 75 mm.
-
Ferrule for connection with adjustable constant fresh air flow
regulator (See 4.5.1.2 – Adjustable constant fresh air flow
regulator). This latter is inserted into a flexible duct of
maximum length 450 mm ø 125 mm.
NOTE: Each duct is provided with a clamp facilitating the
mounting of the latter on the manifold of the main supply.
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