Stan Dard Fea Tures - Chilled Water Mod Els - Liebert Challenger Plus CP20A U Technical Data Manual

Challenger Plus - Technical Data Manual

Stan dard fea tures - chilled water mod els

Cooling coil
The large face area/low face ve loc ity, deep wave fin coil
al lows pre cise con trol of tem pera ture and hu mid ity dur ing
cool ing and de hu midi fi ca tion, and is de signed to op ti mize
fluid ve loc ity and mini mize pres sure drop. The full face area
is ac tive dur ing cool ing and de hu midi fi ca tion, re sult ing in
op era tional en ergy sav ing in the ap pli ca tion area. A
cor ro sion re sis tant drain pan is pro vided on all mod els. The
coil is tested to 30 Bar.
3-way control valve
The mo tor ised chilled wa ter valve pro vides equal per cent age
con trol ac tion in re sponse to room tem pera ture and hu mid ity
as sensed by the mi cro proc es sor. This re sults in a
pro por tional ra tio of ca pac ity to stem travel. The valve
in cludes an op er at ing link age and elec tric mo tor. The valve
can be manu ally ad justed to the closed po si tion (on the
coil- side of the valve) us ing the tool pro vided.
Fig ure 11 - Equal Per cent age Valve Characteristic
12
Operating limits
Chal lenger Plus chilled wa ter units are de signed for
op era tion within the fol low ing work ing lim its (the lim its are
ap pli ca ble to newly com mis sioned ma chines which have
been cor rectly in stalled and main tained).
Indoor operating range
All models from 18.0°C, 45% R.H. to 27.0°C, 55% R.H.
To mini mise the pos si bil ity of wa ter carry over, (i.e. too
much con den sate on the evapo ra tor coil lead ing to the
for ma tion of wa ter drop lets), it is criti cal to en sure that the
la tent load (dif fer ence be tween to tal and sen si ble load) does
not ex ceed 5.5 kW
Air flow
The mini mum and maxi mum air flows and avail able
Ex ter nal Static Pres sure are given in the Tech ni cal Data
sec tion of this man ual. The fan mo tor ther mal over load
pro tects the unit from any dam age which could re sult from
op er at ing out side the speci fied val ues.
Voltage tolerance
All mod els 400 V ± 10%
Fre quency tol er ance
50 Hz ± 2 Hz.
SLE CP TDM E.1 (06/99)