Technical data

Guide Specifications
50 APC NetworkAIR™ FM-DX
B. FLUID COOLER
1. Outdoor Fluid Cooler: The fluid cooler casing shall be of aluminum, and all structural
supports, coil frame, motor-drive supports, and mounting legs shall be made of galvanized
steel. The fluid cooler coil shall have copper tubes expanded into aluminum fins. Headers
and connections shall be copper. The coil shall be pressure-tested and sealed for shipment.
The fluid cooler motors shall have permanently lubricated, sealed, ball bearings, and
internal overload protection. Motors shall be mounted inside the fluid cooler casing for
weather protection and wired to a terminal strip in a weatherproof panel on the unit. The
direct-drive, aluminum fin blade and painted steel hub assembly shall be protected by a
heavy-gauge, vinyl-coated, steel-wire fan guard. On multiple fan units, each fan section
shall be separated by full-width baffles to prevent bypass air. The fluid cooler shall be
sized for 95º F (35º C) ambient, and operate on ________ V, ________ ph, 60 Hz power.
C. PUMP PACKAGE
1. Single Pump Package: The pump package shall be comprised of a centrifugal pump in a
vented enclosure with pump starter, separate fluid cooler fan and pump circuit breakers,
Aquastat, and fan cycling contractors to control the fluid temperature. The controls shall
be mounted on the fluid cooler. An expansion tank and Airtrol fitting shall be supplied for
field installation. The pump size shall be sized for ________ GPM (L/s) at ________ ft
(m) external head, and operate on ________ V, ________ ph, 60 Hz power.
2. Dual Pump Package: The dual pump package shall consist of two centrifugal pumps in an
enclosure. Pump starters, automatic pump switch-over controls, lead-lag pump selector
switch, separate fluid cooler fan and pump circuit breakers, Aquastat, and fan cycling
contractor to control the fluid temperature shall be mounted on the fluid cooler. An
expansion tank and Airtrol fitting shall be supplied for field installation. Each pump shall
be sized for ________ GPM (L/s) at _________ ft (m) external head, and operate on
________ V, ________ ph, 60 Hz power.
3.04 ECONOMIZER
A. Glycol systems shall have the option of an economizer coil that is designed to reduce
operating costs during mid to low ambient temperatures. Economizer cooling coil shall be
copper tube, aluminum fin coil located in the return air before the V-Frame evaporator coil.
The economizer coil shall be rated at ____BTU/HR (kW) sensible cooling capacity with a 45
F (7.2 C) entering glycol solution temperature. The economizer coil shall require ____ GPM
(l/s) and the total unit pressure drop shall not exceed ____feet of water (kPa), when in the
economizer mode of operation.