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Applies to models:

How to: .....replace an Axial Fan on a NVx heater

Issue 1.1 Oct 2017

HT111

NVx

page no. 2 of 6 Replacement NVx Axial Fan Doc ref: H2:111 issue1.1 Oct 2017.

1.1 Main fan from rear.

1.2 Undo cable gland

from rear panel.

1.3 Remove electrical

panel cover to remove

cable.

1.4 Remove main fan

cables t12 from terminal

strip.

WARNING: Always switch off and disconnect electricity supply and close service valve before carrying out any servicing or replacement of failed components.

1.5 Remove earth cables

for main fan.

1.6 Remove neutral cable

for main fan.

1.7 Remove all cables

from any electrical panel

glands.

1.8 Remove fan motor

terminal box cap.

Procedure

page no. 3 of 6 Replacement NVx Axial Fan Doc ref: H2:111 issue1.1 Oct 2017.

1.13 Carefully remove

fan securing bolts

ensuring fan does not

drop!.

1.14 Carefully withdraw

fan assy.

1.15 If necessary to

remove the fan back

plate, unscrew all fixing

screws.

1.16 Remove all fixing

screws.

1.9 Slacken fan motor

cable gland.

1.10 Pull terminal strip

away from the terminal

box.

1.11 Remove brown live,

blue neutral and earth

cable from terminals.

1.12 Remove wires from

cable gland and detach

cable from fan guard.

page no. 4 of 6 Replacement NVx Axial Fan Doc ref: H2:111 issue1.1 Oct 2017.

1.17 Carefully remove

the fan plate.

1.18 Where necessary,

replace the fan back

plate with fixing screws.

1.19 Carefully insert

new fan assembly into

housing.

Singular fans with

connector box gland

facing left, glands on

twin fans face each

other.

1.20 Relocate fixing

bolts through fan guard

ensuring washer and

AVM is used behind the

guard fixing point.

1.21 Tighten all bolts to

correct tension.

1.22 Re insert fan wires

through cable gland.

1.23 Replace fan cables.

Blue neutral to U2,

brown live wire to U1,

earth wire to earth.

1.24 Tighten fan motor

cable gland.

page no. 5 of 6 Replacement NVx Axial Fan Doc ref: H2:111 issue1.1 Oct 2017.

1.25 Replace main fan

cable brown to t12 to

terminal strip.

1.26 Replace neutral

cable for main fan.

1.27 Replace earth cable

for main fan.

1.28 Tighten cable

gland.

1.29 Check operation

of main fan and replace

electrical panel cover.

page no. 6 of 6 Replacement NVx Axial Fan Doc ref: H2:111 issue1.1 Oct 2017.

HEATING DIVISION

Hort Bridge

Ilminster, Somerset TA19 9PS

Tel: 01460 53535

Fax: 01460 52341

Every effort is made to ensure accuracy at time of going to press. However as part of continued product improvement,

we reserve the right to alter specification without prior notice.