Energy Savings - Lennox AIRCOOLAIR ASC Series Application Manual

GENERAL DESCRIPTION
INDOOR SECTION
CIC & CIH
Casing
Casing made of galvanized steel sheet metal painted with a
white RAL 9002 powdered polyester paint.
Fan
Indoor sections are supplied with one or two double-inlet
centrifugal fans. Double fans are fi tted with a common axle with
one motor. Equipped with adjustable drive, variable pulley and
belt, to set up the right airfl ow on site.
Air fi lter
G4 washable air fi lter; auto extinguishable material with M1
classifi cation.

ENERGY SAVINGS

R410A refrigerant
Effi cient systems such as AIRCOOLAIR are designed around
R410A refrigerant to achieve the best performances.
- Energy effi cient refrigerant thanks with pressure drop in the
pipes: Higher evaporating pressure and lower condensing
pressure improve compressor EER & COP.
- R410A compressors have a better isentropic effi ciency.
- Environmentally friendly refrigerant: It contains No Chlorine
(ODP = 0).
Free cooling: economizer for Split Unit
Indoor sections are supplied with one or two double-inlet
centrifugal fans. Double fans are fi tted with a common axle with
one motor. Equipped with adjustable drive, variable pulley and
belt, to set up the right airfl ow on site.
Dynamic and alternate defrost
Defrost is necessary to ensure effi cient operation of heat
pumps in winter. The unit starts defrost cycle when the outside
temperature is below a set temperature and repeat the defrost
cycles periodically. It results sometimes in starting an expensive
defrost cycle when it is very cold outside but very dry, or too
warm, in other words when the coil is not frozen.
- Dynamic defrost is Lennox' answers to unnecessary defrost
cycles. Dynamic defrost detects icing of the coil by monitoring
the difference between refrigerant and outside temperature
and starts the defrost cycle only when required. Under certain
conditions a rooftop unit equipped with this built in dynamic
defrost feature can run several hours in heat pump mode
without starting any defrost cycle. Dynamic defrost can save
up to 15% on annual energy consumption.
- Alternate defrost saves energy by reducing the need for
• 4 •
Heat exchanger
Made of copper tubes and aluminum corrugated swirl fi ns.
Refrigerant circuit:
On cooling only and heat pumps indoor units, each circuit
includes as standard :
- Thermostatic expansion valve
- Filter drier
Each refrigerant circuit is pressure and leak tested with a
Hydrogen/Nitrogen mixture, and vacuumed before being charged
with nitrogen. All units are then subjected to a complete functional
and operational run test to guarantee perfect sealing before
leaving the factory.
auxiliary heating during defrost cycles. With Alternate defrost
when one circuit starts a defrost cycle the other circuit is
running in heat pump at full capacity to minimize the need
for auxiliary heating.
Morning anticipation and dynamic set point for Split
Unit :
The unit can be programmed to switch-on in the morning to reach
the occupied zone temperature set point just in time.
Dynamic set point can be used in summer to offset the ambient
temperature set point according to the outdoor temperature.
This is to avoid large temperature difference between indoor and
outdoor. The indoor temperature set point would then increase
with the outdoor temperature improving comfort and saving large
amount of energy
Scheduling / Time zone Management:
In order to ensure the unit perfectly matches the requirements of
the most diffi cult applications in terms of occupation and varying
internal loads, the CLIMATIC 60 offers now up to 7 time zones
per day (Z0 to Z6) adjustable by steps of 10 minutes. Each time
zone can be programmed to follow one of four possible operating
modes: A,B,C & D
Application Guide • AIRCOOLAIR-AGU-1603-E