Liebert Challenger Plus CP20A U Technical Data Manual page 20

Challenger Plus - Technical Data Manual
Op tional fea tures - all mod els (con tin ued)
Plenum
An in take/sup ply ple num is avail able for con nec tion be tween
the unit and a false ceil ing. The ple num is manu fac tured from
the same ma te rial and in the same col our as the unit.
The ple num con sists of sand wich pan els lined with class 0
3
(ISO 1182.2), 30 kg/m den sity, non- flammable in su la tion.
Avail able heights range from 600 mm to 1200 mm.
Plenum with fixed grille (upflow)
A sup ply air ple num with fixed hori zon tal air flow can be
in stalled on top of the unit. The 900 mm high ple num is
manu fac tured from the same ma te rial and in the same col our
as the unit.
The ple num con sists of sand wich pan els lined with class 0
3
(ISO 1182.2), 30 kg/m den sity, non- flammable in su la tion.
Plenum with adjustable louvered grille
(upflow)
A sup ply air ple num with ad just able (up and down) air flow
can be in stalled on top of the unit. The 900 mm high ple num is
manu fac tured from the same ma te rial and in the same col our
as the unit.
The ple num con sists of sand wich pan els lined with class 0
3
(ISO 1182.2), 30 kg/m den sity, non- flammable in su la tion.
Cau tion is ad vised against ex treme de flec tion of the lou vers
as this can ob struct the air flow and re duce the unit's cool ing
ca pac ity.
Fig ure 17 - Ple num with grille
16
Condensate pump
A con den sate drain pump can be sup plied if re quired. The
pump is com plete with a flow cut out switch al low ing the
pump to stop and re set auto mati cally. De pend ing on the unit
type, it can be sup plied fit ted or loose for field fit ting, con sult
Lie bert Ap pli ca tions En gi neers for de tails. The fol low ing
ta ble lists pump ca pac ity vs. avail able head.
Flow (l/s)
Avail able Head (kPa)
Air intake from the bottom (upflow
models)
Up flow mod els are nor mally front re turn. If re quired, they
can be sup plied as bot tom re turn. Bot tom re turn mod els are
fit ted with a blank front panel (this re duces the sound level of
the unit).
Dampers
Chal lenger Plus units can be pro vided with mo tor ised
shut- off damp ers for down flow mod els and grav ity-fed
damp ers for up flow models.
Al ter na tive re frig er ant R407C
An op tional "green" re frig er ant, R407C can be sup plied with
all com pres so rised mod els.
The com pres sor is filled with a spe cial es ter oil re quired for
R407C. Air cooled units are filled ex-factory with a holding
charge of dry nitrogen. Wa ter, Dual Source Wa ter and
Free cooling units are charged with R407C.
0.083 0.167 0.250
20 19 18
SLE CP TDM E.1 (06/99)
0.333
14