KKT chillers ECO 133 L, Install Instructions Manual, Page: 33 / 39

83003502.Kc ECO_Install_Instruction_V03.odt
Page 33 of 39
7.8 Fans and air chambers
Be sure to avoid air pockets when routing the pipes.
Automatic fans must be attached at the highest point in both pipes to ensure the most
simple and reliable venting procedure.
Perform and repeat the following steps until all the air has been bleed from the system.
This steps have to be done during the first start up and after each replacement of
components with water inside also Siemens components.
The following procedure should be followed to properly air vent a Chiller and Piping before start-up or after
any major hydraulics repair.
1.
Open all individual (not the fill or drain valves) unit valves to assure circulation.
Also open all valves on the IFP Panel.
2.
Fill system with premixed water/ethylene glycol (35-38%glycol), from the lowest point. In case
of repair on the water circuit (also change of water cooled component in the electronic
cabinets of Siemens) refill system with premixed water/ethylene glycol (35-38%glycol) from the
lowest point.
3.
The static pressure at the IFP-pressure gauge (pump is OFF) shall have the following value:
Chiller same level oder above the IFP panel
1,7 – 1,8bar
Chiller lower than the IFP panel 1,2– 1,3bar
4.
Vent all air by the automatic air vent (black or brass coloured small tank on the top of the
suction side of pump, at the IFP panel and in the piping)
5.
If static pressure decreases during air vent the water circuit must be refilled with premixed
water/ethylene glycol (35-38%glycol) up to: see point 3
6.
Now bleed all air out of the system and chiller again (expansion vessel, pump, automatic and
manual air bleeder). If the static pressure decreases again → refill according to point 3
7.
If all air is bled out of the system start pump for a few minutes. Then switch off the pump and
vent air again. If the static pressure decreases again → refill according to point 3
8.
Now start pump again. Monitor pump and bleed points to insure all trapped air is removed.
9.
Check pressure on suction side of the pump after a few minutes and again after a few hours
and refill the system if necessary up to: → refill according to point 3
10.
For a proper adjustment of the suction pressure it is necessary to have the right pressure of
nitrogen filling in the expansion vessel. The correct pressure of the nitrogen filling is 0,6-0,8bar
11.
The suction pressure should be re-checked within 24hours by someone on-site who can advise
of any changes.
12.
Generally is it necessary to check the suction pressure four times a year even if nothing is
changed.