Water Connections - Carrier AQUASNAP 30RB Manual De Instalación

Water connections

The 30RB___- 9 units are equipped with an integrated
hydronic module that allows fast installation with the aid
of a few external components. The 30RB___X9 units, on the
other hand, do not have a circulation pump and expansion
vessel. For this reason, they must be provided outside. In
any case, all the necessary protections and valves are to be
inserted in the water circuit inside the unit.
Refer to Figure 8 for the exact connection of the water
pipes.
Figures 9 and 10 describe the integrated components in
left to the installer as a function of the type of plant.
the outside of the machine using the pre-cut holes (see Fig.
4). In this case, it is necessary to provide a open drain funnel.
Water connections
with the necessary components, using material which will
The typical hydraulic circuit diagram shows a typical water
circuit installation in an air conditioning system.
For an application with a water circuit, the following
before of the heat exchanger and after the connection to
the system return (unit without hydronic module).
2. It is advisable to install shut-off valves to allow isolation
of the most important circuit components, as well as the
heat exchanger itself.
These valves (ball, globe or butterfly valves) should
produce a minimum loss of charge when they are open.
system point.
4. Install purges in the higher sections of the installation.
upstream and downstream of the eventual additional
water pump.
6. All piping must be adequately insulated and supported.
Installation of the following components is obligatory:
1. The presence of particles in the water can lead to
obstructions in the heat exchanger.
2. After assembling the system, or repairing the circuit, the
whole system must be thoroughly cleaned with special
3. When water has to reach temperatures below 5°C, or the
equipment is installed in areas subject to temperatures
below 0°C, it is necessary to mix water with inhibited
ethylene glycol in suitable quantity.
6 30RB
1 automatic purge valve
2 flow switch
3 safety valve (outlet 1/2')
4 temperature probe
5 circulation pump
7 expansion vessel
1 automatic valve with air vent
2 flow switch
3 safety valve (outlet 1/2')
4 temperature probe
4.
at ambient temperatures below 0 °C and no glycol is
used in the hydraulic circuit, it is recommended to drain
the entire system through the discharge port ( point 3 in
Figure 8).
The 30RB___-9 units are equipped with protection against
the seizing of the pump motor shaft. To allow this function,
do not empty the system or disconnect the power during
long periods of inactivity.
In any case, if the pump rotor shaft seizes after a long period
- Disconnect the power
- Remove the front panel
pump
- Insert a screwdriver in the slot and turn the rotor shaft
- Remount the protection plug
- Reconnect the power
In the case of a new installation, or cleaning the circuit, it
is necessary to perform a preventive cleaning of the system.
In order to guarantee the good operation of the product,
each time you clean the system, replace the water or add
glycol.
Carrier recommendations on heat exchange fluids:
detrimental for copper. This is one of the most important
factors for the operating life of copper piping. A content
of several tenths of mg/l will badly corrode the copper
over time.