Airedale UCFC 125 [19/46] Ultima compact freecool chillers
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Airedale UCFC 125 [19/46] Ultima compact freecool chillers

Airedale UCFC 125 [19/46] Ultima compact freecool chillers
ULTIMA COMPACT FREECOOL Chillers
Chillers
18
Installation & Maintenance : 903-132 IM E 06/05/A
Installation Data
GLYCOL DATA
CAUTION
All free-cooling units should use minimum 20% glycol concentration.
Ethylene Glycol Nominal Correction Factors
Glycol in System /
Freezing Point ºC
20% / -9°C 30% / -15°C 40% / -23°C
Cooling Duty 1.00 0.98 0.96
Input Power 1.00 0.98 0.97
Water Flow 1.00 1.09 1.12
Pressure Drop
Catalogue Data x by:
1.00 1.29 1.48
Propylene Glycol Nominal Correction Factors
Glycol in System /
Freezing Point ºC
20% / -6°C 30% / -12°C 40% / -20°C
Cooling Duty 0.98 0.94 0.91
Input Power 1.00 0.98 0.97
Water Flow 1.00 0.99 0.99
Pressure Drop
Catalogue Data x by:
1.08 1.22 1.35
Example UCFC150DQ-4/1 operating at 7/12, 30°C Ambient, 30% Ethylene Glycol
Catalogue
Figure Multiplier
Corrected
Figure
Cooling kW
(refer to the Technical Manual)
146.1 x 0.98 143.2 kW
Input kW
(refer to the Technical Manual)
54.1 x 0.98 53.0 kW
(DX (Mechanical Cooling kW)
Flow l/s
calculated
∆T x 3.9
7.49 x 1.09 8.16 l/s
Pressure Drop kPa
(refer to Waterside Pressure Drops)
146 x 1.29
30%
Ethylene
Glycol =
188 kPa
ELECTRICAL DATA
• As standard the equipment is designed for 400V, 3 phase, 3 wire 50Hz and a
separate permanent 230V, 1 phase, 50Hz supply, to all relevant IEE regulations,
British standards and IEC requirements.
• A fused and isolated electrical supply of the appropriate phase, frequency and
voltage should be installed.
General
• The control voltage to the interlocks is 24V. Always size the low voltage interlock and
protection cabling for a maximum voltage drop of 2V.
CAUTION
Wires should be capable of carrying the maximum load current under non-fault
conditions at the stipulated voltage.
• Avoid large voltage drops on cable runs, particularly low voltage wiring.
CAUTION
A separately fused, locally isolated, permanent single phase and neutral supply
must be fitted
for the compressor sump heater, evaporator trace heating and
control circuits, failure to do so could invalidate warranty
.
Always electrically interlock the operation of the chiller with the pump controls.
Interlocks & Protection
This safety device prevents the chiller operating with low water flow which can cause
serious damage.
CAUTION
Failure to install this safety device will invalidate the chiller warranty.
Do not rely solely on the BMS to protect the chiller against low flow conditions.
CAUTION
An evaporator pump interlock MUST be directly wired to the chiller, refer to
Interconnecting Wiring diagram.

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