7.0 INSTALLATION
7.3 ELECTRICAL
caution
This procedure should only be carried out by a qualified electrician, electrical contractor or your local Inger- soll Rand Distributor or Air Center.
The compressor and drive should be properly grounded
/earthed in accordance with Local and National Code requirements.
Installation of this compressor must be in accordance with recognized electrical codes and any local Health and Safety Codes.
The compressor must have its own isolator situated adjacent to it. The fuse protecting the circuit and the compressor must be selected in accordance with local and national code requirements on the basis of the data provided in the general information section
Feeder cables should be sized by the customer/electrical contractor to ensure that the circuit is balanced and not overloaded by other electrical equipment. The length of wiring from a suitable electrical feed point is critical as voltage drops may impair the performance of the compressor.
Cable sizes may vary considerably so the mains terminals will accept up to 50mm2 (1awg) (37/45k & 50/60H) and up to 90mm2 (3/0awg) (55/75k & 75/100H) cable. The N75K−160K and N100H−200H machines mains terminals will accept 2 x 120mm2 (4/0 AWG) cables. The N250H−300H−2S machines main terminals will accept 2 x 400 MCM cables.
Feeder cable connections to incoming terminals L1−L2−L3 should be tight and clean.
The applied voltage must be compatible with the motor and compressor data plate ratings.
The control circuit transformer has different voltage tappings. Ensure that these are set for the specific applied voltage prior to starting.
A hole is provided for incoming power connection. If it is necessary to make a hole in the control box in a different location, care should be taken to not allow metal shavings to enter the starter and other electrical components within the box. If another hole is used, the original hole must be blocked off.
The feeder cable must be suitably glanded into the power drive module (P.D.M.) electrical box to ensure that dirty air does not by−pass the filter pads or degrade the cooling air flow.
On completion of electrical installation, check that blower motor rotation is correct. N250H−300H utilizes a fan.
This machine is designed for use in heavy industrial environments, where the electricity supply is separated from nearby residential and commercial areas. If the machine is to be used in the light industrial, residential or commercial environment where the local supply network is shared, further radio frequency (RF) screening measures may be required. Consult your local distributor/supplier for details of the optional RF filter. RF filter supplied as standard on N250−300H−2S
The compressor has a anti−condensation heater and thermostat in the electrical box. This circuit can be connected to an independent electrical supply of either 110V or 230V single phase, dependant on the country of installation. The supply should be suitable fused and an independent isolator installed adjacent to the compressor.
This should be done in accordance with local and national codes. It is good practice and sometimes mandatory, to display suitable signs warning that the machine has two separate electrical supplies which both must be isolated before any work is attempted.
Alternately it can be supplied from the 110V tapping of the control transformer and connected as shown on schematic wiring diagram.
IRN37 - 160K - CC & IRN50 - 200H & IRN75 - 160K - 2S & IRN - 100 - 200H - 2S & IRN 250 - 300H - 2S | 21 | |
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