Products that perform…By people who care

Products that perform…By people who care
ENGINEERING BULLETIN…
FEB 2015 (Vol 1)
Equipment : Magnetic Bearing Chiller
Model
: PROmetheus (DCLC-M)
Description : New Product Development
Dunham-Bush is developing the new series of energy efficient chiller using
the oil free magnetic bearing technology, the PROmetheus series. The
PROmetheus series is part of Dunham Bush successful R&D and
continuous effort to develop and manufacture product of high efficiency and
reliability. Some of the PROmetheus product series features are:-
State of-the-art compressor technology
Oil free with magnetic bearing
High efficiency with superior IPLV
Super quiet with low vibration
HFC-134a refrigerant
Easy maintenance
The prototype unit has been supplied to a project in Miami USA. The unit
has replaced an existing water cooled screw chiller as part of an upgrading
and energy efficiency exercise. It has been running successfully since Aug
2014 with superior energy efficiency, low noise with less maintenance. The
PROmetheus series is expected to be officially launch soon with capacity
ranges from 120-600RT.
ENGINEERING BULLETIN…
FEB 2015 (Vol 1)
Equipment : Inverter Rooftop Unit
Model
: Falcon (ACPSE-P)
Description : New Product Development
Dunham-Bush is also developing the new energy efficient rooftop series
with inverter scroll technology.The new Falcon series is also part of
Dunham-Bush continuous effort to develop and manufacture product of high
efficiency and reliability. Some of the new Falcon product series features
are:-
Inverter scroll compressor technology
High efficiency with superior IPLV
Super quiet with low vibration
HFC-410a refrigerant
Energy saving features
Dunham-Bush engineering and R&D team is
developing the prototype unit to be display in
an exhibition in June 2015. The new Falcon
series will put Dunham-Bush ahead of the
competitors with product of energy saving, high
efficiency and reliability. The product is
expected to be officially launch by this year.
FEB 2015 (Vol 1)
ENGINEERING BULLETIN…
Equipment : Selection Software
Model
: SPEC
Description : New Version of Selection Software
As part of Dunham-Bush continuous improvement, we have released the
new generation of SPEC selection software with new features and
enhancements. In this new generation, the SPEC selection software is split
into different versions, with each version assigned for dedicated product
line. This will improve the updates and enhancements of each product lines
as well as making it user friendly.
The list of SPEC selection software version is listed below:SPEC VERSION
SPEC
SPEC – CINDY
SPEC – ASHLEY
SPEC – PHOEBE
PRODUCT LINE
Water Cooled Chiller
Air Cooled Chiller
Centrifugal Chiller
AHU
Packaged
STATUS
Active
Active
Active
Next Release
ENGINEERING BULLETIN…
FEB 2015 (Vol 1)
Equipment : Product Catalogue
Model
: RepNet
Description : Online Catalogue from Website
Did you know that as a SPEC user you are able to download the latest
catalogue online from the Dunham-Bush website via the RepNet portal. All
you need is your SPEC username and password. The RepNet portal is not
only limited to catalogue but also other product literature such as IOM and
brochures. All you need is to follow the following steps to retrieve your latest
catalogue:-
Step 1 – Click on RepNet tab on Dunham-Bush Website
Step 2 – Enter your SPEC username & password
ENGINEERING BULLETIN…
Equipment : Product Catalogue
Model
: RepNet
Description : Online Catalogue from Website
Step 3 – Select your product category
Step 4 – Select your product model
FEB 2015 (Vol 1)
ENGINEERING BULLETIN…
Equipment : Product Catalogue
Model
: RepNet
Description : Online Catalogue from Website
Step 5 – Download your catalogue
Step 6 – Download complete
FEB 2015 (Vol 1)
FEB 2015 (Vol 1)
APPLICATION BULLETIN…
Equipment : Air Cooled Split Unit
Model
: ACCS / EB
Description : Refrigerant Piping Length & Elevation
Continuous research and development (R&D) on Dunham-Bush air cooled
split unit has resulted in the improvement of the maximum allowable
equivalent length and elevation for the ACCS/EB Series for 50/60hz with
R22/R407C refrigerant, as indicated in the table 2 below.
This shall supersedes the table in page 13, IOM# MM0305F/MM0307A
with immediate effect. The new revised IOM may be downloaded through
the RepNet portal.
Table 1: Old Piping Length & Elevation
Max. Allowable Piping
Model
Length (L)
ACCS 68-1520
75 ft [22.9m]
Elevation Difference
Between Two Units
30 ft [9.2 m]
Table 2: New Piping Length & Elevation
Max. Allowable Piping
Model
Length (L)
ACCS 68-570
125 ft [38.1m]
ACCS 640-1520
100 ft [30.5m]
Elevation Difference
Between Two Units
65 ft [19.8 m]
55 ft [16.8 m]
FEB 2015 (Vol 1)
APPLICATION BULLETIN…
Equipment : Air Handling Unit
Model
: CS3
Description : Thermal Break Application
Thermal Break feature consists of casing construction with frames of
extruded aluminium profiles joined by nylon corner pieces, and sandwich
panel with PVC strip in between inner and outer layer. The unit
construction with no direct metal to-metal contact between paneling and
framework thus minimizing cabinet condensate.
Thermal break featured AHU prevents the unit
external condensation that causes AHU to 'sweat'
or condensate easily. One may ask with the
application of thermal break featured AHU, does it
mean that the AHU is no longer 'sweating‘ at all,
no matter whether it is located outdoor or indoor
with warm or even cold ambient air?
The answer is…
NO…! It does not mean that the AHU is no longer 'sweat’ or condensate
when thermal break construction is applied. It depends on some
parameters such as the ambient air temperature (T-amb) of the AHU room
and the AHU internal cold air temperature (T-in) after cooling coil.
Although thermal break construction can reduce the effect of
condensation as compare to conventional construction.
T-amb
T-in
T-in = Off coil temperature
T-amb = Outside AHU temperature
APPLICATION BULLETIN…
FEB 2015 (Vol 1)
Equipment : Air Handling Unit
Model
: CS3
Description : Thermal Break Application
Cabinet
external
condensation
curves
for
the
Conventional
Steel/Aluminium is shown on the Psychometric Chart below. 3 curves are
plotted to represent the internal cold temperatures, which is normally the
off-cooling coil temperature i.e. 490F, 550F and 600F.
Any ambient air condition (where AHU is located) above the curve,
condensation occurs on external cabinet. On the contrary, it the ambient air
condition below the curve, condensation will not form on the AHU external
cabinet.
Chart 1: Conventional Casing
APPLICATION BULLETIN…
FEB 2015 (Vol 1)
Equipment : Air Handling Unit
Model
: CS3
Description : Thermal Break Application
Thermal break casing are able to improve the cabinet external
condensation curves as shown on the Psychometric Chart below. These
will reduce the condensation effect on some applications. However, it may
not prevent condensation in some critical applications. Therefore, a study of
the parameters (T-in, T-amb) plotted on the Psychometric Chart shall be
take into consideration to ensure no condensation will occurs especially on
critical applications. Some of the examples of critical applications are:1)
2)
Ducted Return Air Application
High Percentage Fresh Air Application
Chart 2: Thermal Break Casing
FEB 2015 (Vol 1)
DUNHAM-BUSH WORLWIDE…
United
Kingdom
China
Vietnam
Malaysia
Singapore
Dubai
Thailand
Indonesia
South Africa
Malaysia
China
Lot 5755-6, Kidamai
Industrial Park, Bukit
Angkat 43000, Kajang
Selangor Darul Ehsan
Tel: +603-89249000
Fax: +603-87395020
No 1 Dunham-Bush Rd
Laishan District, Yantai,
Shandong Province,
China 264003
Tel: +86-535-6588999
Fax: +86-535-6581999
United Kingdom
No 8, Downley Road,
Havant,
Hampshire, England
PO9 2JD
Tel: +44-2392477700
Fax: +44-2392450396
South Africa
Singapore
Indonesia
57, Sovereign Drive
Route 21 Corporate
Park Irene, Pretoria
South Africa
Tel: +27-123454202
Fax: +27-123454203
2 Kallang Pudding
Road, #07-07,
Mactech Building
Singapore 349307
Tel: +65-68422012
Fax: +65-68422013
The Vida Building 7th Floor
Jl. Raya Pejuangan
No. 8 Kebon Jeruk
Jakarta 11530, Indonesia
Tel: +62-2129778100
Fax: +62-2129778001
Thailand
Vietnam
10th Floor, Nam A Bank
Tower, 201-203 Cach Mang
Thang 8 Street, District 3,
Ho Chi Minh City, Vietnam
Tel: +84-862903108
Fax: +84-862903109
27th
1, Qhouse Lumpini,
Floor, south Sathorn Road,
Tungmahamek, Sathorn,
Bangkok, Thailand 10120
Tel: +66-026103749
Fax: +66-026103601
UAE
Office # 2606, Fortune
Executive Towers,
Cluster T1, Jumeirah
Lake Tower Dubai,UAE
Tel: +971- 44439207
Fax: +971-44439208