9
Return Air Attenuator 500mm high
.
Attenuator mounted on top of downflow unit. Attenuators
have internal baffles and provide 8-10 db reduction on
airborne noise.
F5/6/7 Panel Filters
Upgrade of standard G4 disposable panel filters to F5/6/7
disposable panel filters.
G2 Pre-filter with G4 Main Filter
100mm G4 disposable filter replaced with 50mm G2
disposable plus 50mm G4 disposable filter.
Washable Filters
Upgrade of standard disposable 100mm G4 disposable filters
to washable 50mm G3 type plus 50mm G4 disposable filter.
Filter Clog
An additional pressure differential switch mounted in the unit
to sense airside pressure drop across the filters. Once the
pressure drop is exceeded a filter clog (filter change) alarm is
generated.
Different Unit Colour
Units can be manufactured in a different colour to the standard
RAL 9018. RAL number to be specified.
Double Skin Panels
All units. Inner perforated galvanized steel or solid painted or
unpainted galvanized steel.
Fresh Air Connection
Units can be supplied with a fresh air inlet connection and
disposable G4 filter. This will admit approximately 3-5% of
the recirculated air volume.
Hot Gas Bypass
Hot gas bypass line including hot gas bypass valve fitted to
provide capacity control in low load situations.
Liquid Receiver
Liquid receiver fitted in unit base of indoor unit. Receiver is
complete with rotalock valve on the discharge.
Oil Separator
Oil separator fitted in indoor unit to prevent migration of oil
away from compressor.
Compressor Acoustic Jacket
High mass barrier insulation to reduce compressor noise.
Condensate Pump
Where, due to location, it is not possible to gravity drain units,
a condensate pump can be fitted to collect any condensate and
pump it to the nearest convenient drain point (pump duty is 6
l/min Vs 6 m head). A cheaper cold condensate pump is
available for units without humidifiers.
Handshake - Autosequence / Autorotate
For interconnection of up to 16 units. Interconnection by
means of a shielded twisted pair cable from interface board to
interface board between units. This shall provide N+1 with one
unit always in standby in case of duty unit failure. Standby unit
shall be rotated over time. Changeover shall be set between 1-
168 hours (1 hour – 1 week). In case of high temperature alarm
standby unit shall run & revert to standby once temperature is
corrected. In the group of up to 16 unit, any number can be
running & any number can be set in standby.
Smoke Detector
A smoke detector shall be provided & mounted in the return
air path to interface with the unit controls and generate an
alarm.
Fire Detector
A fire detector shall be provided & mounted in the return air
path to interface with the unit controls and generate an alarm.
Fire Stat
A fire stat shall be provided & mounted in the return air path
within the unit to interface with the unit controls and indicate
an alarm.
Water Detection – Point Type
Consists of a water detection module mounted in unit & point
sensor which can be placed in unit or under the floor. Multiple
point sensors can be placed in series with each other. A cable
type water warning is also available.
RS 485 Communications Card
Serial interface card for Microprocessor board. For BMS
setup. Can communicate on Delta 2 own Protocol & Modbus
without an external Gateway.
BACnet over RS 485
Serial interface card for Microprocessor board. For BMS
setup. Runs on BACnet protocol over RS 485. Final setup by
BMS system integrator.
BACnet over TCP/IP
Serial interface card for Microprocessor board. For BMS
setup. Runs on BACnet protocol over TCP/IP. Final setup by
BMS system integrator.
GUIDE SPECIFICATIONS
