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InRoom Precision AC Tech Data Manual82
3.03 WATER-COOLED
A. The water-cooled system shall consist of an evaporator section including evaporator coil, EC Fan
package, controls, electrical section, compressor, and water-cooled condenser. The condenser
shall be stainless steel brazed plate design and shall be controlled by 2- or 3-way valve. Maximum
water pressure shall be 2758 kPa (400 psig).
3.04 GLYCOL-COOLED
A. The glycol-cooled system shall consist of an evaporator section including evaporator coil, EC Fan
package, controls, electrical section, compressor, and glycol-cooled condenser. The condenser
shall be stainless steel brazed plate design and shall be controlled by a 2- or 3-way valve.
Maximum water pressure shall be 2758 kPa (400 psig).
3.05 PUMP PACKAGE
A. Single Pump Package: The pump package shall be comprised of a centrifugal pump in a vented
enclosure. 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 ________ L/m (GPM) at
________ m (ft) external head, and operate on ________ V, _____ ph, _____ Hz power.
B. 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 ________ L/m (GPM)
at _________ m (ft) external head, and operate on ________ V, _____ ph, ____ Hz power.
3.06 ECONOMIZER
A. Glycol/ Water systems shall have the option of an economizer coil that is designed to reduce
operating costs during mid to low ambient temperatures. The economizer cooling coil shall be
copper tube, aluminum fin coil located in the return air before the evaporator coil. The
economizer coil shall be rated at ____ kW (BTU/HR) sensible cooling capacity with a 7.2° C (45°
F) entering glycol solution temperature. The economizer coil shall require ____ l/m (GPM) and
the total unit pressure drop shall not exceed ____kPa (feet of water), when in the economizer
mode of operation.
3.07 MULTICOOL
A. Air systems shall have the option of a chilled water coil that is designed to be the primary cooling
source to the backup direct expansion coil. The MultiCool (chilled water) coil shall be
constructed with copper tubes and aluminum fins. It shall be located in the return air, before the
evaporator coil. The MultiCool coil shall be rated at ____ kW (BTU/HR) sensible cooling
capacity with 7.2° C (45° F) entering water temperature. The MultiCool coil shall require
____ l/m (GPM) of chilled water and the pressure drop shall not exceed ____ kPa (psig).
3.08 CHILLED WATER
A. The unit shall be piped in accordance with the highest commercial quality procedures. All
exposed piping shall be insulated copper, type "L". All pipe forming shall be tool bent with proper
bend radii to prevent tube flattening in the curve. The chilled water piping shall be insulated with
closed cell neoprene thermal insulation. The chilled water flow shall be controlled by a 2- or 3-
way valve with a 24 VDC Actuator.