Tag: packaged rooftop unit

Optional Features
A）Construction options:
1. Metal mesh on condenser section.
2. Optional supply/return air configurations, optional bottom supply and return type.
3. Evaporator with treated anti-corrosion protection for coils (blue fins)for copper/aluminum coils only.
4. “25mm (1”)” or “50mm(2”)” thick flat filter.
5. Economizer option with fresh, return and exhaust air dampers with cowl.
If this option is installed in the unit the unit has the ability to work with free cooling or free heating mode allowing it to exploit
the external environmental condition as much as possible, since it avoids turning on the heaters and the compressors. This
function can be achieved by controlling the opening/closing of the external air damper. With reference to the difference
between the outdoor air temperature(std)/enthalpy and the indoor air temperature(std)/enthalpy.
6. High Static condenser fan option will also required a sealed + drain condensing section.
7. Upgraded Evaporator Fan Motor Drives.
B）Electrical options:
1. Power circuit breaker for each motor.
2. Main power molded case circuit breaker for the whole unit (can also be available with an external handle as an option).
3. Low ambient control:
The refrigeration systems in all unit are inherently designed to operate efficiently, without extra controls or modifications. To
permit the unit to operate in low ambient condition a head pressure control can be Installed either by:
 ON/OFF condenser fans sequencing (for models with 2 condenser fans).
 3 speed of the condenser fan motor.
4. Earth leakage relay for each compressor.
5. Earth leakage relay for the whole unit.
6. External overload relay for each motor.
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7. Power factor correction capacitor.
8. Automatic or manual provision for pump down operation of each compressor stop.
9. Building automation system interface. Interfacing with other building management systems can be Achieved by an optional
card which can communicate with other devices using the serial communication port.
10. Voltage monitor controller (phase sequence relay) for monitoring the main incoming power supply for the unit which
provides protection from single-phasing, under-voltage, phase-voltage imbalance and phase-non-sequence
Refrigeration options:
1. Heat pump packaged unit with 4-way reversing valve, suction accumulator is a standard feature in heat pump option.
2. Pressure gauges for each refrigeration circuit (high/low pressure gauges).
3. Hot gas bypass (where low-local situation occurs and where it is necessary avoid low suction pressure and “compressor
cycling”)
4. Extra refrigerant accessories such as suction accumulators (for cooling units only), refrigerant liquid receivers, oil
separators etc..
5. Solenoid valve for heat pump mode.
6. High and low pressure controller for models

DEKON Roorftop air conditioner

FEATURES

Efficient. These reverse cycle (heat pump) air conditioners provide one of the most efficient forms of heating you can invest
in. For every 1 kW of power consumed, up to 2.8 kW of heat is generated. For every 1 kW of power consumed, up to 3.1 kW
of heat is generated. Each outdoor unit incorporates high efficiency scroll compressors. Heat exchange coils use high
efficient tube for better heat transfer.
Performance. These systems have been designed and tested to perform in ambient conditions as low as -10°C and as high
as 45°C. For the models from 25 to  190 belt drive fan motors are used to match the supply air requirements.
The smaller units (models from 10 to  20) have 3 speed direct drive fans for adjusting air flows.
Durable. Our packaged systems are built tough to withstand all weathers. Their durable construction ensures a long life and
excellent return on your investment. The outdoor air coils’ aluminum fins are epoxy coated for extra protection in corrosive
environments, e.g. salt laden sea air. Cabinets are constructed from high grade steel – polyester powder coated for all
weather protection. External fasteners are stainless steel or galvanized type. Corrosion resistant drain trays are also
included.
Insulation. Indoor air sections are generously insulated to reduce condensation and contain noise.
More Safe. The refrigeration system includes a number of protection facilities, including: HP and LP switches, phase
sequence relay, circuit breaker control etc.
UNIT DESCRIPTION AND TECHNICAL DATA PREFACE AND FEATURES
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Economy. Some models feature the flexibility and economy of 2~4 stages operation. Compressors are progressively
switched on only as they are needed. This has the added advantage of lowering start-up current.
Economizer Option. If the outdoor air heat content or temperature is below that of the return air, a fresh air damper opens
and the return air damper closes to provide the first stage of cooling. Operating costs are reduced as the compressor(s) will
only operate to provide more cooling if it is required.
FreshAir Introduction. An optional fresh air damper is available for most models. For applications using high proportions of
fresh air (50%+) a hot gas bypass and HP fan speed controller are recommended and are available as options.
Peace of mind. The manufacturer operates a quality management system that conforms to international standard like CE,
ISO14001, ISO9001:2000. DEKON products have been chosen, against worldwide competition, for use in some of the most
exclusive projects — chosen because of their proven efficiency, durability, performance, reliability and value.
Easy service. Quick release fasteners are provided on electrical and compressor panel.
Quiet design. Apartments are provided on electrical and compressor section, low noise.