Aircommand Sparrow Mk4 El Kitabı - Sayfa 5

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2. Assess Roof Strength

• The roof members MUST be strong enough to support the

weight of the unit without any roof deﬂ ection that will

cause "pooling" of water around the unit. Contact your

caravan manufacturer to conﬁ rm the max load the roof is

able to handle.

• If the roof does not have an existing hole one must be cut.

Cut through the roof then use the roof hole as a guide to

cut through the ceiling. Contact your caravan

manufacturer for the best method to cut through the roof.

• The square hole in the roof (356 x 356mm, 14" x 14") MUST

be boxed up with minimum 20mm square timber to

provide a structure strong enough to withstand the

compression of the installation bolts. This is also to ensure

that air in not drawn from the roof cavity (Fig 3 & 4).

Remember to leave access for wiring.

• Longitudinals MUST be ﬁ xed securely to the transverse

roof members to transfer load (Fig 3 & 4).

WARNING

There may be electrical wiring located between the roof and

ceiling. Ensure that power is properly disconnected at the

supply (mains and/or battery). Failure to do so may result in

personal injury or death.

TIP: Always use crawl boards across the roof to avoid damage.

3. Installing Weather Collar

Ensure that the roof is clean, dry and free from

grease or oil and that there are no roof seams

running through the installation area.

IMPORTANT

The weather collar must be assembled to the roof

top the right way up. Check the orientation of the

part. Look for the 'THIS SIDE UP STICKER'.

• Apply silicone sealant to underside face of collar

(Fig 5 – left hand picture).

• Turn collar over, make sure 'THIS SIDE UP' sticker

is facing up and apply the collar to the 14" hole.

• Push down on collar and remove excess from

around the edges.

Longitudinals must be ﬁ xed securely

to transverse roof members

Fig 3: Shows an ideal roof structure with strong longitudinals

and a 14' hole boxed.

20mm min

The roof cavity must

be framed to support

the units weight.

Fig 4: The roof cavity MUST be boxed with timber to provide a

solid structure.

Apply sealant to

this underside

face only.

Fig 5: Left hand picture shows underside of weather collar –

apply sealant across this entire face. Right hand picture shows

'THIS SIDE UP' sticker. Keep this side up when applying to roof.

Be sure to allow

space for power

cable.