Technical data

Guide Specifications—For Liebert DataMate 1.5- to 3-Ton (5 to 10.5kW)

2.3 Indoor Remote Water/Glycol-Cooled Condensing Unit

The water/glycol condensing unit shall include a scroll compressor, high-pressure switch, coaxial con-

denser, water-regulating valve, hot gas bypass system and liquid line solenoid valve. A hot gas bypass

circuit shall be provided to reduce compressor cycling and improve operation under low-load condi-

tions. All components shall be factory-assembled, charged with R-407C refrigerant and sealed. No

internal piping, brazing dehydration or charging shall be required. Units available for [(2-ton)(3-ton)]

systems.

The water/glycol condensing unit shall be equipped with a coaxial condenser having a total system

pressure drop of ______ ft. of water (kPa) and a flow rate of ______ GPM (l/s) with ______ °F (°C) enter-

ing water/glycol temperature.

The condenser circuit shall be pre-piped with a [(2-way) (3-way)] regulating valve which is head-pres-

sure actuated.

The condenser water/glycol circuit shall be designed for a static operating pressure of [(150psi

(1034kPa)) (350 PSI (2413 kPa))].

2.4 Factory-Installed Options

2.4.1 Electric Reheat

The electric reheat shall be low-watt density, tubular element and shall include agency approved

safety switch to protect the system from overheating. The capacity of the reheat coil shall be ______

BTU/HR, ____ KW, controlled in 1 stage.

2.4.2 Steam Generating Humidifier

The environmental control system shall be equipped with a steam generating humidifier that is con-

trolled by the microprocessor control system. It shall be complete with disposable canister, all supply

and drain valves, 1" (25.4mm) air gap on fill line, inlet strainer, steam distributor, and electronic con-

trols. The need to change canister shall be annunciated on the microprocessor wallbox control panel.

The humidifier shall have a capacity of 3 lb./hr. (1.4kg/h). An LED light on the humidifier assembly

shall indicate cylinder full, overcurrent detection, fill system fault, and end of cylinder life conditions.

2.5 Ship-Loose Accessories

2.5.1 Remote Sensors

The unit shall be supplied with remote temperature and humidity sensors. The sensors shall be con-

nected to the unit by a 30 ft. (9m) shielded cable.

2.5.2 Condensate Pump

The condensate pump shall have the capacity of _____ GPH (___ l/h) at ___ ft. head (___ kPa). It shall

be complete with integral float switch, discharge check valve, pump, motor assembly and reservoir. A

secondary float switch shall be provided to permit field wiring to the unit control to shut down the

evaporator upon a high water level condition.

2.5.3 Refrigerant Line Sets

Pre-charged refrigerant line sets shall be provided by Emerson in proper lengths for application. Line

set length shall be [(15 ft. (4.5m)) (30 ft. (9m))].

2.5.4 Refrigerant Line Sweat Adapter Kit

Provide a sweat adapter kit to permit field brazing of refrigerant line connections.

2.5.5 Step-Down Transformer

A step-down transformer shall be provided for [(Indoor Evaporator) (Close-Coupled Water/Glycol Con-

densing Unit) (Outdoor Air-Cooled Condensing Unit)] needing 277V input power voltage. The trans-

former shall be coated with epoxy and contained in an enclosed, non-ventilated electrical box with

adaptable mounting brackets, suitable for [(indoor)(outdoor)] mounting.