72 APC NetworkAIR AFX Series: Guidelines for Installation
Verify that all parts ordered were received as specified and that the unit is the
correct size and voltage necessary to fulfill your environmental control
needs. Report any damage discovered to the freight carrier. If necessary,
contact the APC field service department for help in repairing or replacing
damaged parts. While APC is not responsible for damage incurred in transit,
we want to make sure that you have no undue delays in your system start-up.
Rigging The unit is manufactured with a formed steel frame for maximum strength
and unit integrity. However, as with all electrical and mechanical equipment,
you must take care with proper rigging of your unit.
When using a forklift to move the unit, use the shipping skid to protect the
bottom of the unit. When using chains, cables or rope to lift the unit, use
spreader bars to prevent damage to the finished panel.
Floorstand Install a threaded pedestal into each leg of the floorstand. Use the washer and
nut on each panel to tighten against the floorstand leg.
Utility connections All connections are made through the bottom left of the unit (the left side of
upflow discharge units) for ease of service connections. Refer to the
installation manual for pipe sizes and specific locations for your unit.
Power unit The AFX unit uses 3-phase power for operation. Bring the service cable
through the bottom left of the unit and through the bulkhead hole into the
electrical box to the circuit breaker provided on he left side of the electrical
box. The ground lug is located near the 3-phase high-voltage connector. THE
UNIT MUST BE UTILITY GROUNDED OR THE WARRANTY IS
VOID.
Humidifier
connections
The humidifier inlet connection is in the bottom of the mechanical section. A
1/4" compression connection is supplied with the unit.
Condensate drain Condensate from the evaporator pan and discharge from the humidifier
flushing system drain through a 7/8" ID drain trap in the bottom of the unit.
Water supply to
humidifier
1. The humidifier fill valve orifice is sized for supply water pressure from
30 PSIG (210 kPa) to 85 PSIG (590 kPa).
2. For cases above 90 PSIG (630 kPa), install a pressure-reducing valve in
the water feed line to the unit.
3. With extremely dirty or muddy water sources, proper filtration is
required on the units incoming water line.
4. DO NOT use softened water with the humidifier. Softened water is too
conductive.
5. DO NOT use completely demineralized water with the humidifier. The
minerals allow the electrode principle to work.
6. DO NOT use a hot water source. Doing so will cause deposits that will
eventually block the fill valve orifices.