Carrier 50NC 118 - Heat Recovery Coil

29
13.3 Heat recovery coil
13 - FACTORY OPTIONS AND ACCESSORIES
● The heat recovery coil (HRC) is located between the main
indoor coil and the air fi lters (indoor module).
The coil function is to pre-heat the air that will pass through
the main indoor coil. For this, it uses the temperature of an
outdoor water installation.
It is advisable to install an outdoor thermostat that can shut off
the water supply if the temperature drops below the required
value for heating, especially if such a situation is likely to occur
in the installation.
● The "fi lters + coil" assembly is supplied disassembled for
installation on site.
● The coil inlet/outlet connections are shown in the following
drawing (fi g. 13.2).
Dimensions (mm) A B C Ø I/O
022 to 028 Coming soon
038 to 086 975 189 350 1”
106 to 118 Coming soon
● Coil fi lling:
- The coil fi lling must be made with the bleeder open until
water runs through it, which is when it is time to close it.
- Cut off the water supply and let the bubbles generated go
up to the highest coil point and eliminate them by opening
the bleeder.
- Pour more water into the circuit and repeat the previous
steps.
- Activate the water pump (to be foreseen by the installer)
and repeat the previous steps until no air noises are heard
in the piping, which is when the fi lling of the installation will
have been fi nished successfully.
● In case of long unit stops, and forcibly if they happen in the
winter season, the coil must be emptied. Add glycol to the
water if necessary.
● The direction of the water fl ow must be correct and so the
following indications must be observed:
It is recommended to insulate the exposed pipe outside
of the unit.
HEAT RECOVERY COIL
BATTERIE RÉCUP. CHALEUR
BATERÍA RECUP. CALOR
V2200010-R
HEAT RECOVERY COIL
BATTERIE RÉCUP. CHALEUR
BATERÍA RECUP. CALOR
V2200011-R
Bleeder
3WV +
actuator
Drainage
The kit with a 3-way valve is
supplied pre-assembled, but
the installer must connect the
fi ttings to the coil and make
the electrical connection.
1
Outlet
2
Inlet
A
B
C
2
1
Note: See the wiring diagram included with the unit for more
detailed information about the wiring.
● The unit’s electronic control manages both the heat recovery
coil and the 3-way valve.
The cable with the wires for the actuator connection (W50)
is connected in the electrical cabinet of the indoor module.
This cable (3 wires x 1mm
2
) must go through the wall bushing
located next to the cabinet (fi g. 13.1).
Wall bushing
Cable
Actuator
W50 Actuator
53 → COM
54 → 24V
55 → Y2
fi g. 13.1
fi g. 13.2
The assembly must be attached to the return panel of the
interior module using M6 Allen screws (factory provided).