Follow these guidelines when installing your rear-door heat exchanger:
Read the safety information. This information will help you work safely.
Because of the size and weight of the heat exchanger, three trained persons are required to
install or remove the heat exchanger.
Observe good housekeeping in the area where you are working. Place removed packing materials,
tools, and other parts in a safe place.
Do not over-tighten plumbing fittings or connections. This will cause leaks and might damage the
plumbing fittings.
Use pipe dope on all threaded plumbing connections to ensure against leaks.
Do not try to bend or reposition copper tubing. Excessive movement or bending of copper tubing
might damage the tubing and create leaks. If you find leaks, check all plumbing connections and
fittings for leaks before you connect power to the rack or any of the installed components.
Repair all leaks before you connect power to the rack or any of the installed components.
After the heat exchanger is filled, be sure to remove any excess water that might be left over
from the filling process.
Plumbing components expand and contract with changing conditions and might fail or loosen after
installation. Place paper towels under the heat exchanger for a period of time; then, examine them
for signs of a leak. If it appears that there might be a leak, carefully inspect the entire heat
exchanger to determine whether there is a leak or whether it is water that is from the filling
process.
If the heat exchanger core or copper tubing is leaking or is damaged, remove it from the rack.
New heat exchangers can be filled with pressurized nitrogen after assembly. Before you install
the heat exchanger, the nitrogen must be purged from the heat exchanger in a well-ventilated area.
To purge the nitrogen, remove the caps from the air-purging valves and press in on the valve stems
to release the nitrogen.
When you install heat exchangers on a suite of racks, secure the racks together first; then,
install the heat exchangers.
The following graphic describes the parts required for rear door heat exchanger
installation:Figure 1. Rear door heat exchanger installation parts
