APC CM Series User Manual download pdf (Page 71)

66 APC NetworkAIR CM Series: Guidelines for Installation

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.

Utility connections All connections are made through the bottom left of the unit for ease of

service connections. Refer to the installation manual for pipe sizes and

specific locations for your unit.

Power unit The CM unit uses either 1-phase or 3-phase power for operation depending

on the unit. 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 the left side of the electrical box. The ground lug is located near

the 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.

7. Water supplies with high conductivity (above 700

µΩ) must be precon-

ditioned for proper operation and longevity of the humidifier.

Water supply A 16- to 20-mesh strainer must be installed in the water supply to the water

and glycol units to prevent clogging of brazed plate condenser. This is a field

item.

OTE: Because of an ongoing program dedicated to product improvement,

specifications are subject to revisions without notice. APC assumes no

responsibility, and disclaims all liability for damages resulting from use of

this information or for any errors or omissions.

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APC CM Series User Manual Page 71

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