Hydraulic Connections; Connection To The System - Hitecsa EQU-PF 233 Manual De Instalación, Uso Y Mantenimiento

Proceed as follows to connect the Area Terminal to the Chiller/heat
pump board:

remove the panel that protects the electrical panel;

pass the telephone cable coming from the Area Terminal through
the cable glands on the electrical panel and the structure;

engage the end of the telephone cable with the J13 female
connector on the unit electronic board;

re-mount the previously-removed panels.
Bianco White Blanc Weiss Blanco
1
Nero Black Noir Schwarz Negro
2
Rosso Red Rouge Rot Rojo
3
4
Giallo Yellow Jaune Gelb Amarillo
5
Blu Blue Bleu Blau Azul marino
6
(*) Note: an AWG 20/22 shielded cable (4 wires + shield) and two
branching boards (use the E968573484 KIT) must be used to connect
the KTAU and the electronic board of the chiller/heat pump when the
length exceeds 50 m and reaches a maximum of 200 m. As shown in
the diagram below.
C = AWG 20/22 shielded cable (4 wires + shield) (not supplied)
S = shield of the shielded cable
D = branching board (E968573484)
T = telephone cable (E968573484)
AP1 = Electronic chiller/heat pump board
1
2
3
4
5
6
200 m
N
N
O
C
0
S9
2 1
II.6

HYDRAULIC CONNECTIONS

II.6.1

Connection to the system

Rx/Tx-
Rx/Tx+
GND
The standard unit is equipped with Victaulic fittings with welding carbon
steel fittings (refer to the attached tables for the position and size of the
fittings).
The pipes must be mechanically insulated and supported to prevent the
unit from being subjected to anomalous stress.
Shut-off valves that isolate the unit from the rest of the system and
elastic connection joints must be installed, as well as system/machine
drain taps.
The rate of the water that flows through the heat exchanger must not
drop below the value corresponding to a temperature differential of 8°C
(with both compressors on).
The unit must be correctly levelled and positioned on a supporting
surface capable of sustaining its full weight.
During long periods of inactivity, it is advisable to drain the water from
the system.
Ethylene glycol must be added to the hydraulic circuit in order to avoid
draining the water.
o To allow the units to run smoothly it is recommended not to mix the
drawn air with the expelled air, therefore the supply air must be
channelled and expelled out of the room where the unit is installed.
o The section of the supply channel must always be equal to or
greater than that of the fan. The KRAM kit (outlet antivibration
connection) is available to prevent vibrations from being transmitted and
allows the unit to be separated from the channel. The room in which the
unit is to be installed must have an opening that allows the air to be
drawn from the outside through a section that is at least equal to the
surface of the finned coil.
o The intake can be channelled. The KRAS kit (inlet antivibration
connection) is available to prevent vibrations from being transmitted.
o Refer to the total air flow rates according to the desired speeds and
pressure drops in the expulsion system to size the channelling.
14
SECTION II: INSTALLATION AND MAINTENANCE
IMPORTANT!
The hydraulic system and the connection of the unit
to the system must be carried out in compliance
with local and national regulations in force.
IMPORTANT!
Shut-off valves that isolate the unit from the rest of
the system must be installed. It is mandatory to
install square mesh filters (longest side = 0.8 mm),
which are suitably sized and of adequate pressure
drops for the system. Clean the filter from time to
time.