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724-746-5500 | blackbox.com
Chapter 3: Installing the Heat-Transfer Door
CAUTION: When using the External Right-Angle Hose Kits to pass the hose under the enclosure frame, the clearance between the
bottom of the HTD/IT enclosure and the floor must be at least 2.125” (5.4 cm).
3. Check the HTD after several hours of operation. If there is a splashing or gurgling sound, repeat the air-purging procedure on
both air purging valves (trapped air from the hoses might have migrated to the HTD).
4. Check the HTD for air in the coil again after one month of operation, to ensure that the HTD is filled correctly.
3.3.5 Airflow Management
IT enclosures should be configured to maximize the airflow through the HTD. Exact configurations will vary based on selection of
IT equipment, enclosure models, and site-specific conditions. Consult your enclosure supplier for further guidance on available
accessories and best practices for enclosure-level airflow management. Optimal cooling performance can be achieved when
industry-accepted best practices are used such as the following:
1. Any open U spaces on the front mounting rails should be covered using horizontal blanking panels and any open spaces along
the side of the front mounting rails (particularly in enclosures over 24”/60 cm wide) should be covered using vertical blanking
panels.
2. Side panels or divider panels should be used on both sides of each enclosure to contain the exhaust air within each enclosure.
3. Solid roof panels and bases should be used to contain the exhaust air within each enclosure. Any cable/cord penetrations
should be blocked as much as possible using devices such as brush strips.
4. Any penetrations through raised floor tiles should use raised floor brush strip grommets to block as much of the opening as
possible.