Connections; Air Connections; Indoor Unit; Hydraulic Connections - Carrier 50CJ Serie Installations-, Betriebs- Und Wartungsanleitung

6 - CONNECTIONS

6.1 - Air connections

■ Indoor unit

The air connection is made using rigid ducts in sheet steel or similar, fitted with a drilled connection flange. It is secured with self-tapping
screws. A gasket should be fitted between the flange and the unit.
For units to be fitted as UNDER models (air discharge to the ground), a support base is available as an option to enable this. If the
raised floor allows, a single hole is required, in the raised floor itself, with the same dimensions as the base. Tightness will be ensured
by fitting a gasket between the unit and the support frame.

6.2 - Hydraulic connections

The hydraulic pipes must be routed through the plate provided for this purpose.
UNDER
(removable bottom or right-hand side plate)
■ Condensate drain
- Fit a siphon: H = 100 mm
- If the humidifier option is selected: the drained water will not flow into the unit's drain pan.
- To have a single drain for both, connect the humidifier drain after the unit's drain pan.
- Two wrenches must always be used when connecting or tightening couplings to avoid bending pipes.
- When the condensate pump option is present, it is fitted inside the unit (connection via a flexible pipe 5 mm in diameter), if the
humidifier option has not been selected.
Warning: the operating pressure on the chilled or hot water network must not exceed 8 bar.
■ Diameters of water coil connections
Unit W
Cooling coil
Unit W
X unit
Inlet G1/2" M
Heating coil
Outlet G1/2" M
Refer to the section on the "Humidifier" to connect the humidifier.

6.3 - Refrigerant connections, Unit X

■ Installation precautions

- The refrigerant connections between the unit and the condenser must be made by qualified personnel.
- Only insulated copper refrigeration pipes must be used.
- This network must be designed and constructed correctly in order to ensure the entire system operates correctly.
- The pipes must be sufficiently flexible to withstand fluctuations in length, expansion and contraction.
- The liquid line must be angled to ensure it always conveys the fluid to the unit.
It is important to avoid:
- Excessive refrigerant fluid loss,
- Accumulation of oil,
- Liquid ingress into the compressor, either when operating or idle,
The pipe route must:
- not hinder, nor be hindered by, the existing installation,
- be protected against accidental shocks,
- be visible in its entirety, and not be encased in plaster or concrete.
- The height differences and equivalent lengths between the indoor and outdoor unit must meet the recommendations (see Table).
- T he pipe dimensions must ensure a minimum pressure drop, and the minimum and maximum speeds must be complied with to
ensure correct circulation of the gas and movement of the oil.
- Fit oil traps every 4 metres on the vertical columns to ensure the oil is returned to the compressor.
- Check that no contamination has fallen into the tube.
- Carry out all brazing operations using a nitrogen purge.
1 - Remove the precut foam panel,
2 - Drill the external panel,
3 - Make the correct cut-outs in the plate
4 - Put it back in place before routing the tubing, and seal to prevent
any air bypass.
W5
Inlet G1/2" M
Outlet G1/2" M
W5 W8
X5 X8
G1/2" M
G1/2" M
W8
G3/4" M
G3/4" M
W12 W16
X10 X 12/15
G1/2" M G1/2" M
G1/2" M G1/2" M
OVER
(Routing on the right-hand side)
W12 W16
G3/4" M G3/4" M
G3/4" M G3/4" M
W27
X 31/36
X 19/24
G3/4" M G3/4" M
G3/4" M G3/4" M
W27
G1" M
G1" M
X 38/48
G3/4" M
G3/4" M
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