HP 11744195 - Manual (Page 12)

Chart Environmental Chambers System Installation
System Installation
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Location
The location of the chamber should be chosen with a few items in mind:
• The left side of the chamber has an access port, which allows passing power and
data acquisition wires into the chamber and connecting to the device under test.
• The top side of the chamber has the control box. For safety and service reasons,
this side must be kept clear at least three feet from the control box door.
• The front of the chamber contains the door. Enough room should be left so the
door can swing fully open for ease of loading test items in and out of the chamber.
• The rear of the chamber contains the blower motor assembly. Space should be
left to allow a service technician to access this assembly. Also note that the
blower assembly has an extended shaft that protrudes through the chamber wall
and connects to the blower wheel. Should the blower assembly ever need to be
removed from the chamber, the blower will need to be able to slide back far
enough to get the shaft back out of the chamber wall.
• The chamber weighs approximately 200 pounds, if it is going to be placed on a
surface, be sure the surface can support the weight safely.
❏
Electrical Power Hook-Up
The electrical power needs to be connected from above and into the back of the control
box. A large hole is provided in the back of the control console for the entrance of the
power wires. The power specs are given in the Specs section of this manual. It is
extremely important to run a properly sized ground wire. It is often beneficial to provide
a ground wire that is actually larger than conventional standards. Doing so may aid in
reducing any electrical noise problems. When running power there should be at least one
to two feet of flexible conduit before the chamber connection to leave room for
expansion and contraction of the floor as well as allow for slight variances in chamber
placement. If the chamber uses the cord/plug supplied by Chart, that will make
connecting power much simpler. If the customer does not wish to use the cord/plug
assembly, it is possible to run wires directly into the control box and terminate at the
same points as the cord/plug assembly did.
All power needed to operate the chamber is generated/supplied from the main control
box. Only one main power supply is needed to operate the chamber. The power of the
control box does not have any provisions for powering any devices under test.
After the installation is complete, it is important to check the rotational direction of the
blower. If the fans are not rotating in the proper direction, the heaters will not get
sufficient air flow and cause premature burn-out and failure of the heater elements. If the
fans are not rotating in the proper direction, switch two of the power leads to the blower,
as this should change the rotational direction. Proper rotational direction will provide air
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