InfraSuite - CoolDoor
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3.7
External Piping
(Figure 3-9: External Piping)
As shown in
Figure 3-9
, the door of the CoolDoor will open and close during application.
Therefore, pipes must be fitted at the water inlet and outlet. Note that the soft tubes and
connections must be able to have acceptable rotation. The standard of connection is a screw
cross-over joint, or an optional quick joint. Install the ball valve provided by Delta on the
outlet pipe behind the soft tube. After the external pipeline is established, it is recommended
that you hold the pressure to check whether the connections are leaking or not. The holding
pressure should not be higher than the maximum pressure of the CoolDoor, 142 psig. Delta
recommends installing isolation valves on the water outlet before the ball valve of the
CoolDoor and on the water inlet before the soft tube, which will allow for maintenance and
disassembly.
Delta recommends using a closed water system for chilled water supply. The system has
independent pumps, expansion tanks, and heat exchangers to prevent outside pollution from
entering the system and ensure the operating efficiency of the CoolDoor.
•
Pipeline washing
To guarantee cooling efficiency, you must purify the pipeline to filter out impurities and
chemical substances. For pipeline washing, use a hose to create a short circuit that
makes the chilled water go directly from the inlet end to the return end, without passing
through the cooling unit. If your pipeline system has a Y-filter, please install a fine-
meshed filter (20-mesh suggested) in it to filter out the fine impurities; after 12h-24h of
water circulation in the pipeline, change to a larger-meshed filter (3-mesh suggested).
