Homa TP Series Manuel d'utilisateur télécharger pdf (Page 3)

TP Series

Installation, Operation & Maintenance Manual

ELECTRICAL INSTALLATION:

GENERAL GUIDELINES

All electrical work shall be carried out under the

supervision of an authorized, licensed electrician.

The present state adopted edition of the

National Electrical Code as well as all local

codes and regulations shall be complied with.

VERIFICATION OF POWER SUPPLY

Prior to making any electrical connections or

applying power to the pump, compare the power

supply available at the pump station to the data on

the unit's nameplate. Confirm that both voltage

and phase match between pump and control

panel. The voltage supplied at the pump shall be

+5 / -10% of the nameplate value, frequency shall

be + / - 1% of the nameplate value, the voltage

phase balance shall be within 1% and the

maximum corrected power factor shall be 1.0.

POWER LEAD WIRING

HOMA TP Series pumps may be provided with 1 or

more cables, depending on motor horsepower and

operating voltage. Power leads L1, L2, & L3 may

be provided as single conductor, or as twin

conductor. Twin conductor configuration may use

leads from separate cables, or may use two

conductors within one cable. Please refer to wiring

diagram enclosed for specific connection details.

The pump must be connected electrically through a

motor starter with proper circuit breaker protection

in order to validate warranty. Do not splice cables.

THERMAL SWITCH WIRING :

Pumps are equipped with thermal switches

embedded in the stator windings which are

normally closed, automatically resetting switches.

Switches will open when the internal temperature

rises above the design temperature, and will close

when the temperature returns to normal. Some

non explosion proof, single phase TP pumps have

internally connected thermals which shut the pump

down in the event of over temperature condition

and do not require any external connection.

Explosion proof pumps and pumps with 7 lead

cable have thermal switches which must be wired

into the over temperature circuit of the control

panel.

Note: All sizes of Class 1, Div. 1 pumps for

hazardous service will have externally wired

thermal switches. Thermal switch leads must

be connected to a current regulated control

circuit in accordance with NEC.

Thermal switch leads must be connected to

validate warranty.

Identify thermal switch leads marked T1 and T3 in

the power or control cable. The resistance across

these leads will be .5 Ohm. These leads must be

connected to the thermal overload relay such as

the HOMA Go switch seal fail / thermal relay

(option) or other current regulated power supply /

controller.

SEAL PROBE WIRING

The mechanical seal leak detector probe utilized in

the pump is a conductive probe which is normally

open. The intrusion of water into the seal chamber

completes the electrical circuit. Control panel

provisions will sense this circuit closure, and will

provide indication or alarm functions depending on

the panel design. Either single or dual wire

systems may be provided. Single wire systems

utilize one energizing conductor, and the pump

casing and neutral lead as the ground or return

portion of the circuit. The dual wire systems utilize

two separate conductors for each leg of the circuit.

With either system, the seal probe leads must be

wired into a control circuit provided in the control

panel. This control circuit must energize the probe

with a regulated power source, and sense the

closed circuit in event of water intrusion. Indication

and alarm functions must also be provided in the

control circuit. Please see control panel wiring

diagram (by others) for seal probe connection

points. IMPORTANT: For Hazardous Area

Classification Pumps, leak detector circuit must be

in conformance with applicable NEC codes and

regulations.

START / RUN CAPACITORS AND RELAYS:

All single phase motors require start and/or run

capacitors to operate. Refer to the enclosed wiring

diagrams. Capacitors and relays must be sized for

the specific motor. Capacitors are sized based on

ideal conditions. The run capacitor may need to be

resized to match the available field voltage. Each

cap kit shipped is supplied with a wiring diagram

and start up procedure.

Pg. 3

1 2 3 4 5 6 7 8 ... 12 13

Commentaires sur ces manuels

Pas de commentaire

Homa TP Series Manuel d'utilisateur Page 3

Commentaires sur ces manuels