Energy Tech Laboratories DSH installation instructions General Information

Models: DSH

1 24
Download 24 pages 39.61 Kb
Page 4
Image 4
GENERAL INFORMATION

FORM 145.32-IOM1 (908)

GENERAL INFORMATION

Our units are designed to meet the ever-changing (unique) installation requirements of today’s market. The horizontal configuration is unitized for single package or split installation. Low profile design allows the unit to be installed on the floor or suspended from the ceiling. All unit components are securely mounted inside the heavy gauge “Galvalume” sheet metal cabinet. All units are lined with a 1/2 in. thick – 21lb density acoustical insulation to ensure the quietest operation. All models are shipped with medium-efficiency 2-in. thick throw- away filters. Multi-position filter rack is external to the cabinet.

Unit can be turned on its side for short periods of time, which allows passage through standard door sizes. Removal of the cross supports on the top and sides will convert packaged unit into a split system, allowing the condensing section to be installed remotely from the evaporator section.

Horizontal units 2, 3, 4 & 5 ton models have a single refrigerant circuit configuration. All models are equipped with an adjustable thermal expansion valve (with exter- nal equalizer), one valve per circuit. Each refrigerant circuit is also equipped with a liquid line filter drier, sight glass/moisture indicator and easy access service gauge ports. All 2-5 ton models are shipped as factory-charged unitized packages. The 2-5 ton units include refrigerant line shut-off valves to allow the units to be field split.

Installation time is minimized with all models. When plan- ning an installation consider power supply, thermostat, condensate drain line, duct run, servicing allowances, and load points. A remote thermostat control device is field supplied and installed to control the units operation. Each refrigerant circuit is equipped with auto-reset high pressure and low pressure switches. Each circuit is con- stantly monitored by ComfortAlert module. By monitoring and analyzing data from the Copeland Scroll compressor and the thermostat demand, the module can accurately detect the cause of electrical and system related failures and protect the compressor. A fllashing LED indicator communicates the ALERT code and guides the service technician more quickly and accurately to the root cause of a problem. Control circuit is 24-volt operation with oversized transformer. Optional anti-short circuit timers can be field/factory installed.

Service access doors are equipped with handles and are located on all sides of the unit to allow easy servic- ing of all components. Service access doors are factory shipped with knock-outs allowing gauge lines to be installed and pressure readings to be taken while the machine is operating. In addition there is a removable panel on the access door so visual observation of the sight glass is possible without removing the access door. All units are equipped with centrifugal blowers combined with variable pitch adjustable pulleys. Forward curved double width and inlet centrifugal blowers are used for condenser & evaporator air movement. All models em- ploy a draw-through air flow system. All blower wheels are galvanized steel, with solid steel shafts and are equipped with permanently lubricated ball bearings. V- belt driven blowers are used in all models; RPM can be adjusted through the variable pitch motor sheave.

ONLY QUALIFIED PERSONNEL SHOULD PERFORM INSTALLATION AND SER- VICE OF THIS EQUIPMENT.

High efficiency scroll compressors are used in all mod- els, mounted on durable rubber isolator pads reducing vibration and noise while operating. Large evaporator and condenser coil face areas reduce noise levels, air pressure drops and minimize potential for condensate blow off. All models are equipped with copper tube and rippled aluminum plate fin coils.

Units will operate reliably at an outdoor ambient down to 60 deg F.

4

JOHNSON CONTROLS

Page 4
Image 4
Energy Tech Laboratories DSH installation instructions General Information