York 152, YLCC 42/62/82/102/112, YLCC-h, 122 manual Hydraulic connections diagram

Hydraulic connections

The hydraulic connections of the water intake and outlet of the chiller should be carried out respecting the intake and outlet directions indicated at the front of the unit.

An iron (not galvanised) or copper tubing can be use, with dimensions no lower than those indicated, and keeping in mind the pressure drops of the indoor exchanger and of the installation.

Pump dimensioning should be carried out considering a nomi- nal flow that allows the ∆t of the project within the limits of the unit: min. 3° C and max. 7° C.The head pressure of the pump chosen must cover the pressure drops of the installation plus the pressure drops of the chiller.

It is convenient that the tubing connection be carried out by means of anti-vibratory couplings.

In all cases, a flow switch must be installed so as to avoid the possibility of operation without water circulation, as well as a water filter (both are obligatory for warrantee application).

In the water feedback tubing, an expansion vessel adequate to the total volume of the water in the installation should also

be installed in the unit.

Chiller water volume is as follows:

Size	Litres
42	25
62	28
82	38.2
102	38.2
122	78.5
152	73.5

During the winter season, with outdoor temperatures below 0° C, precautions should be taken to avoid the water from freezing in the tubing networks and inside the inner chiller exchanger.

The following solutions are usually applied:

a)Drain the circuit.

b)Fill the circuit with an antifreeze mixture (glycol).

c)Keep the circulator in constant operation.

Note: See hydraulic connections diagram.

Hydraulic connections diagram
YLCC
YLCC-H
				AUTOMATIC FILLING
				ASSEMBLY
FLEXIBLE GASKET		CIRCULATING	WATER GAUGE	THERMOMETER
		PUMP
	FILTER
			EXPANSION
			VESSEL
			DRAIN
WATER GAUGE				FLOW SWITCH
				PURGER
			ISOLATOR	SAFETY
			VALVE
		BUFFER TANK		VALVE
FLEXIBLE GASKET
		(IF NECESSARY)
				23