21 © STULZ USA – all rights reserved 11.8.22
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
1. Ensure that manual shut-off valves are installed in both the supply and return lines for servicing the unit
and for emergency isolation.
2. Chilled water supply and return pipes connect to the copper pipe stubs that project from the top of the
unit. The supply pipe is labeled Water Inlet. The return pipe is labeled Water Outlet.
3. Remove the water coupling clamps from the return and supply pipes in the top module and slide the
rubber gasket up the pipe away from the end of the pipe. Use an EPDM-compatible pipe lubricant
(Shurjoint pipe lubricant or comparable) as needed to slide the gasket over the pipe.
4. For both the supply and return water lines:
a. Slide the rubber gasket over the pipe joint so gasket does not overlap the indent in the ends of the
pipes (see Figure 8). Use an EPDM-compatible pipe lubricant (Shurjoint pipe lubricant or comparable)
as needed to slide the gasket over the pipes.
CAUTION
Take care not to pinch the gasket between the coupling halves. Doing so can result in leaks.
b. Assemble clamp halves over the gasket so the lips of the clamp engage the indent in the ends of the
pipes. Tighten nuts alternately and equally until bolt pads meet and make metal-to-metal contact,
then tighten nuts by another one quarter to one half turn to make sure the bolts and nuts are snug and
secure. A torque wrench is not required.
NOTE
An air vent and several Schrader valves are installed in the unit piping.
Condensate Drain Connections
There are two options for connecting a condensate drain to the unit. For units with a condensate pump, it
is factory mounted in the bottom module section. The pump is a positive displacement diaphragm pump
capable of .65 gpm at 40 psi. The line connects to condensate line stub on the bottom of the lower module
as standard option. Alternatively, the line stub may be located on the top of the upper unit per customer need.
Condensate is routed through a condensate pump and discharges at the bottom of the unit.
For units using a gravity feed condensate line, a condensate drain assembly is shipped loose with the unit
and installed after the modules are assembled. The line connects to condensate line stubs in the lower
right corners of the return-side of the modules via short “steam” hose sections and hose clamps that are
preinstalled on the condensate line. To install the line:
1. Loosen the hose clamps on the end of the steam hoses that connect to the modules.
2. Fit the steam hoses over the module condensate line stubs and push the condensate pipe into the pipe
clamps until it snaps into place (see Figure 10).
3. Use a screw drive to hand-tighten the hose clamps to make them water tight.
4. Connect a facility drain line to the bottom of the condensate pipe.
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