Manual code 75803707A.0708
Page 7 of 64
3 DESCRIPTION OF THE UNIT
The machine in question is an air conditioner with direct expansion or chilled water coil designed for use in
computer centres.
The cabinet consists of hot-galvanised sheet panels in a frame constructed of painted aluminium section; the
panels are made from hot-galvanised sheet steel covered in a PVC film, secured by quick-thread screws that can be
unscrewed using a special safety wrench. The structure incorporates a thermal and acoustic insulation system using self-
extinguishing materials (polyurethane foam) protected by plastic film.
The machine comprises the following sections:
• Ventilation section: consisting of one or more plug fans.
• Filter section: self-extinguishing non-regenerable filters; the machine includes provision for the use of
a differential pressure switch to allow display of clogged filter warning signal;
• Refrigeration circuit: comprising an expansion coil with copper pipes and aluminium cooling fins, a
scroll compressor fixed to the machine frame on rubber mountings, thermostatic expansion valve,
receiver-drier, plate-type condenser (accessory), low pressure switch (automatic reset) and high
pressure switch (manual reset), pressurisation nitrogen charge, antifreeze lubrication oil charge;
• Water circuit (Series U): with cooling expansion coil with copper pipes in aluminium cooling fins, 3-way
motorised valve with manual emergency control, water circuit with anti-condensation thermal
insulation;
• Electrical power and control panel.
3.1 UNIT CODE
The code contains the following information:
O C A 5 1 a H FC R407C
1 2 3 4 5 6 7 8 - 9 10
O
Upflow air discharge
1 O
Air discharge type:
U
Downflow air discharge
2 C
Series for technology rooms
A
Direct expansion coil with remote condenser
3 A
Cooling type:
U
Chilled water coil with remote cooling
4 5
Nominal size (nominal cooling capacity in TONS)
5 1
Number of cooling circuits or number of rows on chilled water coil
6 a
Series modification index
H
High air flow rate
7 H
Air flow rate/cooling capacity ratio
L
Low air flow rate
8 FC
FREE COOLING unit type
9 TS
TWIN SOURCES unit type
10 R407C
Refrigerant type
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