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ENG
Part number
Refrigerant inlet piping
Outside diam. Thickness
[-]
[mm]
[in]
HB1US03M0W1A0
12
0.47
HB1US03E0W1A0
12
0.47
HB1USL0D0W1A0
12
0.47
HB1US04M0W1A0
12
0.47
HB1US04E0W1A0
12
0.47
HB1USL1D0W1A0
12
0.47
HB1US06M0W1A0
15
0.59
HB1US06E0W1A0
15
0.59
HB1US02D0W1A0
15
0.59
HB1US08M0W1B0
18
0.71
HB1US08E0W1B0
18
0.71
HB1US03D0W1B0
18
0.71
HB1US08M3W1B0
18
0.71
HB1US08E3W1B0
18
0.71
HB1US02D3W1B0
18
0.71
The unit must be connected to the evaporator section via refrigerant piping
in a workmanlike manner, by qualified operators using brazing. The piping
must be securely fixed and not transmit vibrations to the Heosbox unit.
Connection procedure
1. Wear all personal protective equipment needed to complete the
connection procedure: gloves, protective glasses and safety shoes.
2. Make sure the unit is powered off, placing disconnect switch QS1 and
the switch or disconnect device on the Heosbox power supply line in
the OFF position (see the wiring diagram).
3. Make sure that the unit is firmly anchored to the system it is part of,
using all of the "L" brackets at the base of the structure.
4. Open the refrigerant circuit cover panel.
5. With the valves closed, connect Heosbox to the unit's refrigerant
circuit; before opening the valves, check the pressure in the circuit,
which must be around 1 bar; open the valves slowly and then carry
out leak testing, empty the circuit and charge with refrigerant.
6. Expel the inert gas (nitrogen) from inside the unit. Use the pressure
ports (pos. 39, 40 and 48) arranged on the suction side, on the
discharge side and on the liquid line. Take care to avoid any danger of
materials and/or fluids being expelled outside of the unit.
7. Fully open the liquid injection valve (pos. 24) and, where present,
the expansion valve (pos. 26, single evaporator unit only). The unit is
already supplied with the electronic expansion valves fully open; to
check the position use the CAREL manual actuator, P/N E2VMAG0000.
8. Remove the two plugs on the refrigerant inlet and outlet pipes.
9. Cover the structure with a metal screen so as to not damage the paint.
10. Cover the refrigerant shut-off valves with a wet rag (pos. 31 and 32) to
avoid overheating that would damage them.
11. Connect the two refrigerant pipes, inlet (pos. 34) and outlet (position
35) to the rest of the refrigerant circuit by braze welding.
12. Open the two shut-off valves located near the refrigerant inlet and
outlet pipes (pos. 31 - 32).
13. After brazing the refrigerant circuit, charge the circuit with nitrogen
to a maximum pressure of 20 barg (290 psi) and check that there are
no leaks by measuring the pressure with a pressure gauge or other
suitable instruments.
The Heosbox unit cannot be connected to the evaporating system using
any other type of connection from that specified, otherwise the warranty
will be void.
Caution: the refrigerant connections must always be completed by
qualified personnel who have the qualifications and authorizations
required by local regulations, using appropriate personal protective
equipment (PPE), who are aware of the necessary precautions and who are
able to correctly and safely complete all required operations.
Residual risk of expulsion of pressurized fluids/bursting of equipment
if the instructions regarding the maximum pressure limits in the low
pressure circuit are not observed when checking for leaks with nitrogen
following welding on site.
Heos BOX - NAM version +0300097EF - rel. 1.0 - 17.06.2021
Refrigerant outlet piping
Outside diam. Thickness
[mm]
[in]
[mm]
[in]
[mm]
1
0.04
6
0.236
0.75
1
0.04
6
0.236
0.75
1
0.04
6
0.236
0.75
1
0.04
6
0.236
0.75
1
0.04
6
0.236
0.75
1
0.04
6
0.236
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
1
0.04
10
0.394
0.75
4.4 Electrical connections
[in]
0.03
Caution: before continuing, make sure the unit is powered off,
0.03
placing disconnect switch QS1 and the switch or disconnect device on the
0.03
Heosbox power supply line in the OFF position (see the wiring diagram).
0.03
0.03
The mains power disconnect device must have a contact opening
0.03
distance that allows complete disconnection in overvoltage category III
0.03
conditions; it must also be incorporated into the Heosbox power supply
0.03
line in accordance with national regulations. It is compulsory to follow the
0.03
0.03
instructions on the wiring diagrams and comply with the minimum sizes
0.03
of the multi-core cables shown in the table below before connecting the
0.03
devices managed by the electrical panels.
0.03
0.03
Power sup-
0.03
Part number
ply 208V
Tab. 4.b
[-]
HB1US****W1A0 4XAWG 6
HB1US****W1B0 4XAWG 6
If a defrost heater is connected to the dedicated connector, the safety
thermostat output must also be managed; see the panel wiring diagrams.
This acts as thermal protection for the heaters used by the installer.
If the safety thermostat is not fitted, as the showcase heater features
external protection against overtemperature, use the red wire (AWG18) to
electrically connect terminals 119 and 120 on the electrical panel.
Safety thermostat
Caution: the electrical connections must always be completed by
qualified personnel who have the qualifications and authorizations
required by local regulations, using appropriate personal protective
equipment (PPE), who are aware of the necessary precautions and who are
able to correctly and safely complete all required operations.
4.5 Kit installation
The WiFi gateway is available as an optional kit for all Heosbox part
numbers:
Part number
[-]
HB1US****W1A0
HB1US****W1B0
For the electrical connection of the kit, see the information in the wiring
diagrams and in this manual:
• before opening the electrical panel, move disconnect switch QS1 to
OFF;
• when connecting the wires, make sure that the tip of the wire is fully
inserted into the opening provided on the terminal;
• open the bag with the 2 screws;
• take the WiFi gateway and fix it to the holes provided on the external
panel interface (housing the probe outputs), using the two screws
provided together with the kit, in the space designated as "WIFI
optional"on fig. 2.i;
• connect the RS485 gateway output with the terminal screen-printed
"pLAN" to the external interface of the box (housing the probe outputs);
• run the Gateway power cable through the cable gland marked GATEWAY
and connect it to the gateway power supply;
• take the black wire on the extension numbered 35 and fix it to the
terminal XA1:102;
• take the black wire on the extension numbered 36 and fix it to the
terminal XA1:101;
• close the electrical compartment and move the disconnect switch to
ON to restart the unit.
18
1 ph
Light
Evap. Fan
Rail
Defrost
24 V
24 V
heater
208 V
24 V
AWG 12 AWG 18 AWG 18
AWG 18 AWG 18
AWG 12 AWG 18 AWG 18
AWG 18 AWG 18
Fig. 4.b
WiFi gateway HBOPZGATX0000
x
x
Defrost
24 V
Tab. 4.c
Tab. 4.d
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