Unit installation

ELECTRICAL CONNECTIONS, POWER AND CONTROL WIRING

All units are wired completely at the factory prior to delivery. The connections that must be made by the installer are to

the main power source and interlocking with water flow switch, pumps, remote monitoring system and two barrel units

water temperature sensor, if any.

In connecting power wiring to the unit, the following guidelines must be followed to ensure safe and satisfactory

operation of the units. Failure to follow these recommendations could cause harm to personnel or damage to the unit

and may nullify the warranty:

• All field wiring should be carried out in accordance with the National Electrical Code (NEC) and local codes.

• All wiring is to be checked for damages and all terminal connections for tightness. All wiring to the unit should use

copper conductors only, sized based on the minimum circuit ampacity (MCA) values given in the Electrical Data

Section of this manual or the unit nameplate.

• The power supply should match the unit nameplate in volts, phase and Hertz. The voltage imbalance between

phases must not exceed 2%.

Main power must be supplied from a single field supplied and mounted Disconnect

switch, using dual element time delay fuse or circuit breaker.

If the supply voltage phase imbalance is more than 2%, contact your local electric

utility company immediately.

No additional controls (relays, etc.) should be mounted in the unit control panel unless

recommended by Zamil. Power and control wiring not connected to the unit should not

be run through the unit control panel. If these precautions are not observed it could

lead to a risk of electrocution or nuisance faults.

After connection of wiring, do not switch ON main power to the unit out rightly. Some

internal components get live when the main disconnect is switched ON and this must

be done by authorized personnel only.

If the unit is mounted on spring vibration isolators, electrical service to the unit must

also be flexibly connected (by means of a suitable flexible conduit), as some

movement of the unit can be expected during normal operation.

CAUTION

WARNING

CAUTION

ATTENTION

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