Installation manual

Installation
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2.4 Piping
All fluid and refrigeration connections to the unit, with the exceptions of the condensate drain and
live steam, are sweat copper. Factory-installed piping brackets must not be removed. Field-installed
piping must be installed in accordance with local codes and must be properly assembled, supported,
isolated and insulated. Avoid piping runs through noise-sensitive areas, such as office walls and con-
ference rooms.
Refer to specific text and detailed diagrams in this manual for other unit-specific piping requirements
2.4.1 Drain Line
A 3/4" NPT is provided for the evaporator coil condensate drain. This drain line also drains the
humidifier, if applicable. The drain line must be located so it will not be exposed to freezing tempera-
tures. The drain should be at least the full size of the drain connection and pitched a minimum of 1/8"
per ft. (11mm per meter).
2.4.2 Piping Considerations for Raised-Floor Applications
All piping below the elevated floor must be located so that it offers the least resistance to air flow.
Careful planning of the piping layout under the raised floor is required to prevent the air flow from
being blocked. When installing piping on the subfloor, it is recommended that the pipes be mounted in
a horizontal plane rather than stacked one above the other. Whenever possible, the pipes should be
run parallel to the air flow.
2.5 Electrical Connections
Three-phase electrical service is required for all models in either 208, 230, 460 or 575V, 60Hz; or 200,
230 or 400V, 50 Hz. Electrical service shall conform to national and local electrical codes.
Install a manual electrical disconnect switch within 5 feet (1.6 m) of the unit in accordance with
codes. A factory-supplied disconnect switch may be factory-mounted within the unit and accessible
from the exterior.
NOTE
This line may contain boiling water. Use copper or other suitable material for the drain line.
For units without a condensate pump
The unit is shipped from the factory with an internally-mounted trap. No external trap is
required. The drain line must comply with all applicable codes.
For units with a factory-installed condensate pump option
The unit is shipped from the factory with a condensate pump installed. The condensate pump
discharge (drain) line must comply with all applicable codes.
For units with a field-installed condensate pump
The unit is shipped from the factory with the condensate pump option, unmounted in the unit,
which must be installed in the field. The unit has an internally mounted trap. The drain line
from the unit to the condensate pump does not require a trap. The discharge (drain) line from
the pump must comply with all applicable codes.
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