Page 8 / 48
NC, NCD Rev. 2 - Operating Instructions
GB
6.4. Installation
Ensure the inside of pipes are clean before connection.
Mount pump in an easily accessible, position for easier
inspection, dismantling, checking for free rotation of the
shaft and for draining the air from the pump.
To avoid draining and refilling of the whole pipe system
when dismantling the pump, it is recommended to provide
gate valves on the suction and delivery sides.
The pump must be installed with the shaft axis horizontal
(fig. 1).
ATTENTION: The pipes connected to the pump
should be secured to rest clamps so that they do not
transmit stress, strain or vibrations to the pump.
The arrow on the pump casing indicates the direction of
water flow (fig. 2 - POS. 1).
Correct installation positions:
6.4.1. Insulation of the pump in cooling and air condi-
tioning systems.
When installed in cooling and air conditioning systems,
the body of the pump must be insulated.
WARNING
! The body of the pump must be
insulated up to the slot between the motor and the
body of the pump.
The openings for the elimination of condensation must be
clear and must permit discharge from the stator housing.
These openings must remain clear in heating systems
where only the body of the pump must be insulated
(figures 2,3 POS. 15).
6.5 Electrical connection
Electrical connection must be carried out only by
a qualified electrician in accordance with local
regulations.
Follow all safety standards.
The unit must be properly earthed (grounded).
Connect the earthing (grounding) conductor to the ter-
minal with the
marking.
The motor is electronically protected. The motor is
equipped with a thermal probe which switches it off if it
overheats.
Compare the frequency and mains voltage with the
name-plate data and connect the supply conductors to
the terminals in accordance with the appropriate diagram
inside the terminal box cover.
Before connecting it, the upper cover must be unscrewed
(fig. 2 – POS. 2)
Install a
device for disconnection from the mains
(switch) with a contact separation of at least 3 mm in all
poles.
All wires must be positioned so that they do not, in any
manner, touch the tubing or the body of the circulator.
7 STARTUP AND OPERATION
7.1 Preliminary checks before start-up of the pump
Do not start-up the device in case of damaged parts.
7.2 First starting
Bleeding the hydraulic system.
Drain the rest of the air in the pump as follow:
- Close the delivery gate valve;
- Unscrew the vent cap (fig. 1 - POS. 5) and check that
water comes out of the vent hole.
- Close the plug and open again the delivery gate valve.
OFF
OFF
2
3
2
3
2
3
4
IST ND_NCD 02_2016_MXS 11_03con gall 29/03/16 09:49 Pagina 8
