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6.6 ELECTRICAL CONNECTION
When fitting a section of ducting
passing through an outside wall
it must be inclined slightly, falling
away from the appliance to avoid
any rain ingress.
This gives a suggested step-by-step guide to installing the Nuos unit, more
detailed information is included in the following pages.
1. Consider all topics in section 6.1, the Bathroom Zone requirements
(when applicable), and then choose a location for the unit.
2. Design pipework layout with the best position for control valves and
expansion vessel. Ensure drain off cock on the cold water inlet is at
the lowest point below the appliance
3. Design wiring layout, run cables and fit switch/fuse units.
DO NOT TURN POWER ON YET.
4. Carry out pipe installation as far as possible prior to mounting the
unit. It is important to flush pipe runs before connecting to the Nuos.
5. Ensure floor under Nuos is sealed against water ingress.
6. Stand Nuos exactly in position and adjust level using adjustable feet.
7. Consider air in and air exhaust duct, if applicable, and mark necessary
holes in walls/ceiling.
Before drilling the wall for air inlet and/or exhaust ducts, ensure the
mechanical strength of the wall will not be compromised as a direct
result of the holes in the wall.
8. Move Nuos away and cover to prevent damage from dust and debris.
9. Make neat holes for ducting as applicable, clean up and reposition
Nuos.
10. Secure the feet to the floor through the appropriate holes using suitable
screws and rawlplugs; after positioning the appliance, remove the
fabric belt by loosening the relative bolts.
11. Complete all pipework and connections to Nuos.
12. When applicable, fit air in and exhaust ducts as required. Ensure
ducts are easily detachable from the Nuos to allow access for
servicing.
13. Connect Nuos electrical flex to the wall/ceiling switch.
Refer to Commissioning section 7 for completion of installation.
The electrical installation must comply with current IEE Wiring Regulations,
Health & Safety document no. 635 (Electricity at Work Regulations).
(See fig. 6.6A and Wiring Layout fig. 5.9A)
The unit is supplied with a 3 core flex. This should be wired to a 13 amp
double pole isolating switch with at least 3mm pole separation with both
electrical and mechanical indicators.
The Nuos appliance is rated @ IPX4.
6.5 INSTALLING PROCEDURE
13 amp Class A Double Pole Isolating
Switch with at least 3mm pole separation
and electric and mechanical indicators.
Fused 13 amp.
Nuos Flex
or 3183TQ Flex 3-Core x 2.5mm²
heat resistant BS6500.
FIG. 6.6A ELECTRICAL CONNECTION
Zone 3Zone 2
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    Marqué boost dans l’appareillante Submitted on 12-11-2021 at 22:31

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