Envirovent PIV, MIV Installation And User Manual

Due to our policy of continuous innovation and improvement EnviroVent reserves the right to alter

products specication and appearance without notice.

You are about to install a product that is designed to outlast the life-cycle of the
building. Once installed the unit will operate continuously for 5 years and beyond
without a major service. Please therefore ensure that this product is treated with
care and installed properly i.e. for the life of the building. If the unit is mishandled
you might break it! This invalidates the warranty.

And remember, if you have any problems please call our dedicated Technical
Team. We are always pleased to help and in an emergency will come out to site
quickly, completely free of charge.

HOTLINE: [phone]

PIV & MIV® Loft Mounted Unit

PRE-INSTALLATION CHECKLIST

Check that the loft has adequate cross

ow ventilation.

Check that all party walls are intact, seek
advice if the wall is missing or broken.

Check that any ue which passes through

the loft is not damaged, seek advice if the

ue is in a poor state of repair.

Check for any ued appliance which may

draw air from the loft, report to the client.

Check for any holes in the ceilings which
may allow leakage of air to the loft and
repair as appropriate.

Check that the water storage tank is
covered.

FIXING KIT

Description Item

8 X FOAM PADS

4 X PENNY

WASHERS

4 X PLASTER

BOARD PLUGS

4 X WOOD

SCREWS (10 X 1.5)

4 X WOOD

SCREWS (10 X 3)

4 X WOOD

SCREWS (8 X 1)

4 X WOOD

SCREWS (8 X 1.5)

ROLL OF

INSULATION TAPE

02

PIV & MIV® Loft Mounted Unit

INSTALLATION INSTRUCTIONS

IMPORTANT

Be sure to have read and understood these
instructions before beginning the installation
process.

Smoke Detectors

It is important that any open side of the plastic

diuser is not positioned within 1m of a smoke
detector. If the diuser cannot be repositioned,
up to two sides of the diuser may be closed
o using the plastic blanking plate supplied (Loft
only) so that the open sides face a minimum 1.5m

unobstructed path away from the detector. In 3

oor properties a metal re diuser should be
tted at minimum of 1m from the detector (see

page 8).

SAFETY AND RECOMMENDATIONS

• All wiring must comply with Building
Regulations and the current I.E.E. Wiring

Regulations (BS7671) or the equivalent
standards for your country. The nal installation
should be examined and tested by a qualied

electrician.

• Precautions must be taken to avoid the back-

ow of gases into the dwelling from the open
ue of gas or other fuel-burning appliances.

• Make sure the mains supply complies with the
rating label for voltage, frequency and phase.

• This appliance can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capabilities
or lack of experience and knowledge if they
have been given supervision or instruction
concerning use of the appliance in a safe way
and understand the hazards involved. Children
shall not play with the appliance. Cleaning
and user maintenance shall not be made by
children without supervision.

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PIV & MIV® Loft Mounted Unit

INSTALLATION DIAGRAMS

STANDARD INSTALLATION

Also see page 7 for MIV® Loft Mounted Unit (twin spigot) installation method, and page 8 for installations

in 3 storey properties.

Installation diagram for the EnviroVent Loft Mounted Unit

UNIT DIMENSIONS

Dimensions of the EnviroVent Loft Mounted Unit - 470 x 405 x 372mm

*Unswitched fuse spur tted

with 3 Amp fuse

230V A.C.

3 core mains lead

For xing instructions, please

refer to the xing instructions

(gure 1) on page 5

650mm x 50mm x 25mm batten

Ceiling joists

405mm

Contents for unit

1 x Cardboard template
1 x Diuser
1 x Fixing kit
1 x Unswitched fuse spur

1m x 200mm Flexi duct

Additional contents for

unit with heater

1 x Heater enable switch

Heater enable/disable switch

(Heater version only) volt-free

*Subject to capacity, it is possible to connect the EnviroVent Loft Unit with heater to a lighting circuit. If
in doubt, wire through a ring main supply. Ensure the volt-free heater enable/disable switch is tted in a

suitable position for the user. This appliance must be earthed.

372mm

470mm

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