13 © STULZ USA – all rights reserved 11.8.22
CYBERWALL™ INSTALLATION, OPERATION AND MAINTENANCE MANUAL
• Do not pile other material on the unit.
• Periodically, inspect stored units.
Outdoor Storage
Only outdoor air handlers may be stored outdoors, unless otherwise noted. Outdoor air handlers require no
special protection for storage prior to install if the factory cover remains intact.
Long-Term Storage
For longer periods of storage, allow proper clearance around the unit to perform periodic inspections and
maintenance on the equipment. Every two weeks while the unit is in storage, rotate the fan and motor shaft(s)
approximately 30 revolutions by hand. Check for free rotation.
Site Preparation
Conditioned Space
Certain steps may be taken to minimize the effects of the environment surrounding the conditioned space.
This is especially true for critical/precision room preparation (computer rooms/labs) requiring close tolerance
control of temperature and, optionally, humidity. The conditioned space should be well insulated and include
a vapor barrier.
The installer should ensure that the proper insulation rating is used based on the design of the space, which
was the basis for the system selected. The following chart is a recommended minimum R-value (thermal
resistance) to ensure optimum equipment operation.
STRUCTURE RVALUE
CEILING R38
WALL R21
FLOOR R19
DOOR R5
The vapor barrier is the single most important requirement for maintaining environmental control in the
conditioned space. The vapor barrier in the ceiling and walls can be a polyethylene film. Concrete walls and
floors should be painted with a rubber-or plastic-based paint. Doors and windows should be properly sealed,
and a door sweep used to minimize leakage.
Outside or fresh air should be kept to a minimum (as it may add to the cooling load), while still maintaining
the requirement of the Indoor Air Quality (IAQ) standard. Lack of attention to these factors can cause erratic
operation, unstable room control and excessive maintenance costs.
Service Clearances
The CyberWall™ is designed for easy service access. It has doors for accessing the main electric box (bottom
module) and the auxiliary electrical box (top module). No permanent obstructions should be placed in front of
the fan grilles, and the minimum clearances shown in Figure 5 on page 14 should be maintained for the doors
and to permit maintenance from the supply side of the cabinet.
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