Lennox BALTIC Series Application Manual page 10

FEATURES AND BENEFITS
Panel filters with metal frames and disposable filter media
(EU4 / G4)
When units are installed in an environment when it is expected
that filters will be changed more frequently than usual, it is
advisable that the end user includes metallic frame with
washable filter (classified EU4/G4) media. This is a more cost-
effective answer to disposable filters.
options and accessories
Indoor Air Quality Sensor
Indoor air quality is controlled from the CLIMATIC™ 50 board.
A VOC (Volatile Organic Component) sensor will detect the
amount of CO2 in the air between 0 and 2000PPM. (This
obviously varies depending upon space occupancy levels). The
VOC sensor will then send a proportional signal (0-20mA)
to the CLIMATIC™ 50 controller which will then modulate the
percentage of fresh air accordingly. This feature allows you to
match minimum fresh air requirements with occupancy levels
(number of m3/h of fresh air per person) optimising operating
efficiency and energy consumption. Depending upon the fresh
air requirements of your particular application, this option can
offer payback within a few months. Note that this feature is
installed inconjunction with the economiser option. This option
is supplied loose, it has to be wired with a 1 pair shielded twisted
0,5 mm2.
HEATING OPTIONS
Electric Heater
The electric heater comprises of shielded resistance heaters,
which are smooth stainless steel tubes 6 W/cm2 capacity.
High temperature limit control offers overload protection and is
set to 90°C and located at less than 150mm after electric heaters.
This is provided as a standard feature on the electric heater,
with the electric power supply cables made of reticulated silicon
rubber, resistant to temperatures up to 200°C. For any rooftop
unit size, three sizes of electric heater are available, S (stan-
dard), M (Medium) and H (high).
BALTIC 20 and 25 have :
Standard heat : 12 kW , 2 stages
Medium Heat : 24 kW , 2 stages
High Heat : 36 kW, Fully modulating (Triac)
BALTIC 30, 35 have :
Standard heat : 24 kW , 2 stages
Medium Heat : 36 kW , 2 stages
High Heat : 48 kW, Fully modulating (Triac)
BALTIC 40, 45, 50 have :
Standard heat : 27 kW , 2 stages
Medium Heat : 45 kW , 2 stages
High Heat : 54 kW, Fully modulating (Triac)
Capacity of the high heat heater can be limited electronically to
an exact value through the CLIMATIC™ 50.
To reduce installation time and hence cost, electric heaters
are always factory fitted, fully wired and tested, prior to
shipment.
Hot Water Coil
Hot water coils are of a 1 (standard heat) or 2 rows (high heat)
configuration and offer fully modulating control through the use
of a 3 way valve. The hot water coil, connections and valves are
all tested at pressure of 30 bars. Frost protection is provided by
forcing the opening the 3 way valve when supply temperature
from hot water coil falls below 8°C and by stopping the outdoor
fan when that supply temperature falls below 6°C.
Hot water coils are always factory fitted, wired and fully tested,
prior to shipment.
Page 9 - Application Guide 04-2003 / Rooftop BALTIC Series - Page 9