Publicidad
Idiomas disponibles
Idiomas disponibles
•
4EM units equipped with factory-installed Carrier
controller: Fig. 14.
•
Units without electronic control: access to six selectable
fan speeds from outside at the optional terminal block:
Fig. 15 (15a = customer connection, 15b = motor).
Wiring for 42EM 2.1/2.2/2.3 and 42EM 3.1/3.2/3.3: Fig. 16
42EM size 2.1
42EM size 3.1
Neutral (com)
White
1
Phase connected
Red
2
Not connected
Blue
3
Not connected
Black
4
Wiring legend:
Minimum speed = Terminal 6
Maximum speed = Terminal 1
Low speed
= Red wire (14a)
4.2 - Water coil
4.2.1 - Coil removal procedure
WARNING: Disconnect the power supply to the Atmosphera
before carrying out any work on the unit.
•
Close the isolating valves on the manifolds.
•
Unscrew the union nuts to disconnect the flexible
water pipes.
•
Remove the valve actuators taking care to identify the
cooling and heating valves.
•
Disconnect the flexible condensate drain pipe which is
held in place by a collar (the collar is not supplied by
Carrier).
•
Remove the two-way or four-way water flow control
valve bodies. Depending how the Atmosphera is con-
figured, the four-way valve coupling may be fitted with
a heating/cooling changeover switch, if so do not
remove it.
•
Remove the 4 torx screws (T0) and slide out the coil
and drain pan assembly.
•
Replacement is by the reversal of the procedure des-
cribed above. Ensure that all gaskets are changed (new
gaskets fitted) and that the inlet and outlet connections
to the coil are made correctly using an appropriate
sealing compound applied to the valve body.
•
Bleed all air from the coil during refilling.
ATTENTION: It is advisable to tighten the valve body to
the coils with caution (15 N·m is sufficient) to ensure they
are not damaged.
NOTE: It is possible to change the coil connection on site
by changing the condensate pan and coil assembly in the
guides.
For Size 3 the water inlet and outlet need to be reversed
to achieve the published performance.
4.2.2 - Coil inlet/outlet positions
Water inlets/outlets, sizes 0.5, 1 and : Fig. 18.
Water inlets/outlets, size 3: Fig. 19.
10
42EM size 2.2
42EM size 2.3
42EM size 3.2
42EM size 3.3
White
White
Blue
Black
Red
Red
Black
Blue
Medium speed
= Grey wire (14b)
High speed
= Black wire (14c)
L
= Live
ATTENTION: Carefully observe the direction indicated
by the arrow on the valves, based on the connection side
and the valve type.
4.3 - Duct connection spigots
These are manufactured from high density plastic with a
VO fire rating, more or less equivalent to class M1 (French
standard). They are encased inside the unit. The ducts
should be fixed to these spigots using circular collars or
adhesive. Screws and rivets should not be used.
WARNING: In order to guarantee good air tightness, the
duct should overlap the whole of the spigot.
Make sure that the maximum supply air temperature does
not exceed 60°C.
Do not lift or support the unit using the spigots, place loads
on the spigots or damage the spigots during installation or
operation.
4.4 - optional filter and filter access
4.4.1 - Description
The Carrier Atmosphera is fitted with a 85% gravimetric
filter (G3), according to standard EN 779. Medium fire
rating M1, metal wire frame.
Different filter access options are available to suit different
site requirements:
•
Unit with non-ducted return air: Access is from the
rear of the unit.
•
Unit with ducted return air: Access is from below.
4.4.2 - Air filter replacement
Air filters should be changed regularly. Filter life depends on
the rate at which the filter becomes clogged, which depends
upon the cleanliness of the working environment.
If clogged filters are not changed they can increase the air
pressure drop, trapped dust particles may be given off and
entrained in the air supply, and the general performance of
the Atmosphera may be degraded (as the air flow reduces).
NOTE: When installing an Atmosphera in a ceiling void,
check that no T-bars will obstruct filter access and removal.
4.5 - Fresh air controller
4.5.1 - Fresh air controller with constant air volume
The 4EM Atmosphera can be fitted with a constant fresh
air flow controller allowing the introduction of fresh air and
the air change rate to be controlled.
The following range of fresh air controllers is available:
Option a: 8.3 l/s (30 m
/h) (-10%; +0%)
3
Option b: 16.6 l/s (60 m
/h) (-10%; +0%)
3
Publicidad
