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5 - ELECTRICAL CONNECTION
Please refer to the certified dimensional drawings, supplied with the unit.
5.1 - Power supply
The power supply must conform to the specification on the chiller nameplate. The supply voltage must be within the range
specified in the electrical data table. For connections refer to the wiring diagrams and the certified dimensional drawings.
WARNING: Operation of the chiller with an improper supply voltage or excessive phase imbalance constitutes abuse which
will invalidate the Carrier warranty. If the phase imbalance exceeds 2% for voltage, or 10% for current, contact your local
electricity supply at once and ensure that the chiller is not switched on until corrective measures have been taken.
5.2 - Voltage phase imbalance (%)
voltage phase imbalance (%)= 100 * max. deviation from average voltage/ average voltage
Example:
On a 400 V - 3 ph - 50 Hz supply, the individual phase voltages were measured to be:
AB = 406 V; BC = 399; AC = 394 V
Average voltage = (406 + 399 + 394)/3 = 1199/3 = 399.7 say 400 V
Calculate the maximum deviation from the 400 V average:
(AB) = 406 - 400 = 6
(BC) = 400 - 399 = 1
(CA) = 400 - 394 = 6
The maximum deviation from the average is 6 V. The greatest percentage deviation is:
100 x 6/400 = 1.5 %
This is less than the permissible 2% and is therefore acceptable.
5.3 - Power connection/disconnect switch
Units Connection points
30XQ 0330-1102 (Single unit) 1 per unit
30XQ 1000-1502 (Duplex unit) 1 for circuits A and B and 1 for circuits C and D
Electrical data notes for 30XQ units:
• 30XQ 0330-1102 units have a single power connection point; 30XQ 1000-1502 duplex units have two connection points.
• The control box includes the following standard features:
- One general disconnect switch per circuit
- Motor protection devices for each compressor, the fan(s) and the pump
- Control devices
Field connections:
• All connections to the system and the electrical installations must be in full accordance with all applicable local codes.
• The Carrier 30XQ units are designed and built to ensure conformance with these codes. The recommendations of European standard EN 60 204-1
(Corresponds to IEC 60204-1) (machine safety - electrical machine components part 1: general regulations) are specifically taken into account, when designing the
electrical equipment.
IMPORTANT:
• Generally the recommendations of IEC 60364 are accepted as compliance with the requirements of the installation directives.
Conformance with EN 60204 is the best means of ensuring compliance with the Machines Directive § 1.5.1.
• Annex B of EN 60204-1 describes the electrical characteristics used for the operation of the machines.
• The operating environment for the 30XQ units is specified below:
‑
1. Environment*
Environment as classified in EN 60 721 (corresponds to IEC60721) :
- outdoor installation*
‑
- ambient temperature range:
10° C to +46° C, class 4K4H*
- altitude: ≤ 2000 m
- presence of hard solids, class 4S2* (no significant dust present)
- presence of corrosive and polluting substances, class 4C2 (negligible)
Carrier Yileng - Shanghai, China
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