Unit installation

CDU Installation Guide Page 14
Cooling Distribution Unit
INSTALLATION (continued)
A room temperature & RH sensor is provided with every CDU. As standard this is fitted on the cabinet
front door behind a ventilation grille. If required the sensor can be mounted remotely with the appropriate
cable kit, to be installed on a wall adjacent to the IT enclosures at a height of approx 1.8M (71”).
4.3 Hydraulic
The Primary chilled water hoses can be routed either through the floor void to enter the cabinet from
below along with the process hoses, or from above via the two cut outs in the rear of the cabinet roof
panel. Ball valves are provided for chilled water isolation along with 1½” flexible hose connections for
soldering/brazing to either a 1½” or 42mm copper hard piped installation. The copper pipe should be
suitably supported at installation as close to the stainless braided flexible hose as possible – do not clip to
the cabinet frame.
All primary circuit pipework, hoses and valves should be insulated against condensation.
When the optional internal manifolds are fitted, the secondary circuit hoses should be routed out through
the bottom of the cabinet and through the floor void to each RDHx. Quick release self sealing couplings
are provided on the manifolds for hose connection (see Fig. 3). Crush and kink resistant ¾” bore PVC
hose should be used with a minimum working pressure of 10Bar (145PSI) to connect the CDU cabinet to
each RDHx.
Fig. 3 - Hose Connections (shown with optional internal manifold)
Primary Chilled Water Connections
(42mm / 1½” copper stubs on flexible tails)
Secondary Circuit RDHx Return
Connections (¾” couplings)
Secondary Circuit RDHx Flow
Connections (¾” couplings)
Fig. 2 – Control Transformer
tappings
(208 - 230v tapping)
380 - 415v tapping
460 - 480v tapping
Common tapping