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4 - COMPONENTS
- Unscrew the rear fixing screws from the inside of the ATM
(fig. 16d) and the front fixing screws from the outside
(Fig.16e).
- Take out the battery (Fig.16f) taking care not to damage the
insulation bonded to the sides of the battery.
For remounting:
- Apply the procedure in reverse order ensuring that all the
seals have been changed (new seals put in place) and that
the seals of the inlet/outlet connections of the water battery
have been made.
- In case of damage, replace the insulation located between
the connections of the water battery and the ATM.
- Purge the water battery well during re-intake of water.
CAUTION: It is recommended to tighten the valve bodies on
the coils with care (15 N.m is sufficient) so as not to damage
them.
4.3.2 - Inlet – outlet positions of the water battery
(Fig.17)
ATM Water inlets-outlets size 1 / size 2:
- Battery with 2 tubes: Inlet (Fig. 17a) and Outlet (Fig.17b)
- Battery with 4 tubes (optional): Hot (Fig. 17c) and cold
(Fig.17a) inlets. Hot outlet (Fig. 17d) and cold outlet (Fig.
17b).
he inlets are G1/2" (15/21) male thread screws meant for flat seals
with purges. The outlets are equipped with G1/2" (15/21) rotating
nuts meant for flat seals.
CAUTION: Correctly follow the direction of flow of water
indicated by an arrow on the valve body.
4.4 - Optional air filter and access
4.4.1 - Description
The 42GR ATM is equipped with a throwaway filter in accordance
with the EN 779 standard. Fire rating of the M1 medium, metal
wire framework.
4.4.2 - Replacement of the air filter (Fig. 18)
The replacement of the filter can be done through the filter access
door (Fig.18a). Follow the direction of the filter (Fig. 18b): the side
with the seal (Fig.18c) is positioned against the inner plate of the
ATM.
The filter must be changed regularly. The lifespan of a filter is
dependent on its soiling, which varies according to its conditions
of use.
If a soiled filter is not changed, its load loss increases, it may reject
the dust collected and challenge the performances of the 42GR
ATM (reduction in air flow).
4.5 - Fresh air flow regulator
IMPORTANT: When the unit is provided with an air inlet
temperature sensor, the constant fresh air flow must not
exceed 50 % of the air flow blown through the device at
minimum speed.
4.5.1 - Constant fresh air flow regulator
NOTE: The operation of the fixed constant fresh air flow
regulator 30 m
/h (8.3 l/s) requires a differential pressure
3
ranging between 50 Pa and 200 Pa. As for the constant fresh
air flow regulator adjustable from 60 m
(44.4 l/s), it requires a differential pressure ranging between
70 Pa and 200 Pa.
16
/h (16.6 l/s) to 160 m
/h
3
3
4.5.1.1 - Fixed constant fresh air flow regulator
This type of regulator enables bringing in fresh air flow from 30
m
/h (8.3 l/s -10%, +20%).
3
Procedure for replacement of the fixed constant fresh air flow
regulator:
- Disconnect the flexible fresh air duct (Fig.11a) from the
ferrule.
- Replace the constant fresh air flow regulator (Fig.11b).
- Reconnect the fresh air duct to the ferrule.
4.5.1.2 - adjustable constant fresh air flow regulator
This type of regulator enables bringing in adjustable constant fresh
air flow from 60 to 160 m
/h (16.6 to 44.4 l/s -10%, +20%).
3
Adjustable constant fresh air flow regulator can be modified on
site by displacement or removal of two plastic restrictions.
Procedure for changing or replacement of the adjustable constant
fresh air flow regulator:
- Disconnect the flexible fresh air duct (Fig. 11a) from the
ferrule.
- Move or remove the two restrictions for passage of air to
change the setting (according to Fig.19). In case the regulator
is defective, replace the fresh air flow regulator (Fig.11b).
- Reconnect the flexible fresh air duct to the ferrule.
4.5.2 - Variable fresh air flow regulator
The suspension box of the 42GR ATM can be equipped with a
variable fresh air flow regulator from 0 to 55 l/s (0 to 200 m
This is connected to the Carrier digital regulator and can control
the fresh air flow in two ways:
- Either as a fixed flow by the installer and re-adjustable at will.
- Or depending on the level of CO
by a CO
sensor through the Carrier digital regulator (the
2
CO
sensor is located in the air intake duct of the suspension
2
box).
NOTE: In the case of the variable fresh air flow regulator, it
is necessary for the upstream pressure in the fresh air duct
to be 180 Pa.
4.6 - Water flow control valves
- The valves of 2-channel or 3-channel type have bodies
designed to resist an operating pressure of 16 bars.
4.6.1 - Digital servomotor and proportional
servomotor (3 points)
For these two types of servomotors, the supply voltage is 230 V
AC
To enable priming of the installation with water, hydraulic
balancing of the networks and purging of the units, it will be
required to electrically power the servomotors so as to enable
the valves to open, either by means of wall-mounted
thermostats, or the CTM (Centralized Technical Management).
4.6.2 - Procedure for replacement of the
servomotors (Fig. 20)
The servomotors of the hot and/ or cold water valves can be
replaced if any defect is identified.
CAUTION: Before any intervention on this product, it is
imperative to cut the power supply to the unit.
- Close the isolating valves located on the collectors.
- Disconnect the quick power supply connector of the
servomotor (Fig.20a).
- Disconnect the servomotors (Fig.20b). In the case of 4 tube
battery, identify and mark the cold valve and the hot valve.
- Proceed with reassembly by applying the procedure in
reverse order.
3
/h).
, in this case, it is controlled
2
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