Wolf VW30S Uživatelský manuál stáhnout pdf (Strana 9)

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Cold weather installations. | Cold weather installations

may require an additional backdraft damper to minimize

backward ow of cold air. All Wolf ventilation hoods, except

low-prole wall hoods, come with a backdraft damper con-

nected to the transition. Downdraft systems do not have a

backdraft damper.

High altitudes. | Ventilation systems are less effective at

altitudes above 5,000'

(1524 m). At these altitudes, you

should estimate a 20%–25% reduction in CFM perfor-

mance. A higher CFM blower and increasing the duct size

is recommended.

Make-up air. | Make-up air may be required to replace

air removed by the ventilation system. Consult a qualied

HVAC professional for specic applications.

Step 1: Determine the Duct Run

IMPORTANT NOTE: Consult a qualied HVAC professional

for specic installation and ducting applications.

Check local codes. | Consult a qualied HVAC professional

to ensure all applicable codes are followed. Refer to the

installation guide for your specic Wolf ventilation product.

Minimize the duct run. | The length of the duct run and

number of elbows and transitions can have a signicant

effect on ventilation performance. Keep the duct run as

short as possible and limit the number of elbows and transi-

tions. Do not use exible metal ducting.

Elbows and transitions. | Do not place elbows and transi-

tions back-to-back. Whenever possible, include a minimum

15"

(381) straight ducting between elbows and transitions to

increase ventilation performance.

Use recommended duct sizes. | Depending on the specic

ventilation product, Wolf recommends 8"

(203) or 10" (254)

ducting. Smaller duct sizes will signicantly reduce ventila-

tion performance.

DETERMINE THE DUCT RUN

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Wolf VW30S Uživatelský manuál Strana 9