General Description; Structure; Field Of Application - Lennox @DNOVA THND 045 Installation, Operating And Maintenance Manual

1

General Description

THND/U "Lennox Telecom units" are air conditioners for low- and medium-powered telephone exchanges.
They are designed to be mounted inside shelter.
THND/U air conditioners are direct expansion package units with an air-cooled condenser system. They
are distinguished by an innovative air circulation system which significantly enhances performance in all
conditions.
operating
1.1

Structure

All THND/U units have a galvanised sheet steel supporting base, and enclosing panels made galvanised
sheet steel coated with epoxy polyester powder paint oven cured at 180°C (RALxxxx). The unit features
an exclusive design which, combined with a rational layout of components and extremely compact
dimensions, lends it an attractive appearance.
1.2

Field of application

THND/U units are to be used within the operating limits stated in this manual; failure to comply with said
limits will invalidate the warranties provided in the contract of sale (see Tab. 1)
Tab. 1 Operating limis
Model
Power supply
Minimum outdoor
temperature T
Maximum outdoor
temperature T
Minimum indoor
temp./humidity
conditions
Maximum indoor
temp./humidity
conditions
Storage conditions
Model
Power supply
Minimum outdoor
temperature T
Maximum outdoor
temperature T
Minimum indoor
temp./humidity conditions
Maximum indoor
temp./humidity conditions
Storage conditions
@DNOVA THN_R410A-IOM-1506-E
THND/U/X THND/U/X
045 056
230Vac 10%
24Vdc 16% / 48Vdc 16%
45 °C 45 °C
THND/U/X THND/U/X
170 180
400Vac 10% / 3Ph + N / 50Hz
45 °C 46 °
THND/U/X THND/U/X
073 090
400Vac 10% / 3Ph + N / 50Hz
- 20 °C
45 °C 47,0 °C
19 °C / 30 % U.R.
35 °C / 50 % U.R.
-10 °C / 90 % U.R.
+55 °C / 90 % U.R.
THND/U/X THND/U/X
200 220
- 20 °C
45 °C 46,0 °C
19 °C / 30 % U.R.
35 °C / 50 % U.R.
-10 °C / 90 % U.R.
+55 °C / 90 % U.R.
THND/U/X THND/U/X
105 120
24Vdc 16% / 48Vdc 16%
45,0 °C 46,0 °C
THND/U/X
250
46,0 °C
THND/U/X
150
48,0 °C
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