HQ Series Air Handler HQ Series Air Handler

125 Pages·2004·2.97 MB·English

by  Staples Business Depot

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Represented by:
Scott Springfield Mfg. Inc.
4451-54th Avenue SE.
Calgary, Alberta
Canada T2C 2A2
Bus: [phone]
Fax: [phone]
E-mail: [email protected]
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Background
Scott Springfield Mfg. Inc. founded in 1970, has evolved over the subsequent years to become a
leading supplier of custom designed air handlers. Utilizing the latest technology to design and
manufacture an institutional quality air handler, Scott Springfield’s engineering group provides our
clientele with a flexible approach to solving specific air handling problems, in a timely manner. For both
new construction and retrofit projects, Scott Springfield has applied the knowledge and technology to
creatively respond to the client’s air handling needs.
The product is distributed throughout Canada and the United States by a qualified network of
representatives working closely with owners/engineers to insure a seamless transition from design to
manufacture to field installation. Qualified factory personnel are available to assist during the
installation where requested and are commonly used when retrofit projects are undertaken.
Scott Springfield uses both industry technology and in house systems to optimize the air handler
to conform with the latest industry standards. Designs take into consideration elements for effective
mixing without stratification, minimal internal pressure loss, acoustics, casing integrity and indoor air
quality issues.
Major installations include; medical facilities, post and pre-secondary educational facilities,
military and other government agencies as well as industrial organizations in oil and gas,
pharmaceuticals and pulp and paper.
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Air Handler Design
This catalogue presents the air handlers
in a modular block format. This format has been
chosen to allow the designer to maximum
flexiblity and ease when laying out an air
handler. The engineering for the product is
based on the computer generated modules which
are aligned to address the air handler
requirements.
All air handlers are manufactured as a
complete unit. As a result, when units are split to meet project requirements or transportation limitations,
the contractor is assured of an equipment match and reduced installation time.
Capacities
Scott Springfield units are manufactured for capacities from 1000 CFM (472 l/sec) to more than
100,000 CFM(47,194 l/sec) in a variety of configurations. Static pressure capabilities range up to 10"wg
(2483 Pa) for commercial and institutional units and 15” wg (3725 Pa) for industrial applications.
Casing & Floor
Scott Springfield utilizes a panel type of and 2”(50.8mm) to 4”(101.6mm) deep. With a
construction with double break wall panels standard exterior casing gauge of 16
ranging from 2”(50.8mm) to 4"(101.6mm) in gauge(1.519mm), double break panels and
depth. Casings are available in stainless steel, minimal widths, Scott Springfield units have met
aluminum and galvanized. the deflection criteria on systems to 15”wc (3725
Pa). In addition the casing has been structurally
A casing deflection analysis is performed
analyzed and found to meet seismic zone 4 load
for each application to ascertain the deflection
requirements. For applications operating at a
standard. This standard is to maintain a 1/200"
higher pressures, consult the factory.
(.13mm) deflection at the system conditions.
Maximum panel widths are 24"(610mm) wide
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The unit exterior is smooth sided
without standing seams. One exception are
outdoor units which have a standing seam
roof for added rigidity under load and a
roof pitch for run-off purposes. Individual
wall panels are attached with Tek® screws
located 8"(203mm) on center. To assure a
leak tight casing, sealing strips are used
between the panel before a bead of sealant
is applied to the exterior seam. Equipment is shipment.
designed to a leakage standard of no more than
Insulation and liner material is typically
1% at 1.5 times the specified operating pressure.
compression fitted inside the panel ribs. Raw
The walls and roof are lined with an metal lagging is used over seams between
insulation thickness to suit the panel depth. insulation sections. Liners offered include
Sound sensitive applications requiring perforated and solid in galvanized, aluminum or
additional mass to reduce the casing transmitted stainless steel.
noise will include an additional mass liner. The
The standard insulation has an acrylic
casing is supported on a welded structural base
backing, which helps prevent erosion. On
frame.
request, Scott Springfield provides a dual
The Scott Springfield base consists of a density, high velocity erosion resistant insulation
perimeter structural frame, all welded with which has a surface impregnated with an anti-
structural support cross members. At a microbial growth agent. This material is
minimum of 48”(1219mm), the cross member is typically used in healthcare applications and
“C” channel, one size smaller than the perimeter. retains sound absorption characteristics of the
Outdoor units are designed to overhang the acrylic backed insulation.
perimeter of a roof curb. The frame includes a
Air handler floors are insulated on the
curb mating range around the perimeter. To the
underside to a thickness required. The fibreglass
frame, a heavy gauge flooring material is welded
insulation is then covered with a sheet metal
with all seam welds dye tested to ensure there are
galvanized liner.
no leaks through the floor. Floors are leveled and
a HVAC check performed to identify and correct
“oil canning” prior to final assembly and
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Fan Assemblies
The fans used in Scott Springfield equipment are AMCA certified and selected for peak efficiency
and acoustical characteristics. The fan assembly consists of a fan, motor and welded isolation base. They
are mounted on isolators selected at the design conditions for optimal effectiveness. All fan motor bases
are adjustable to tension belts appropriately.
The appropriate spring isolators are computer selected and
springs matched to the differing loads around the isolation base
frame. For applications requiring seismic restraint, Scott
Springfield mounts the fan assembly on
either a housed isolator rated for the
applicable seismic zone or OSHPD
approved seismic restraint snubbers.
The standard fan/motor assembly is provided with a belt guard with adjustable tachometer
opening. All plenum fans have a protective fan screen enclosing the entire fan wheel. Bearings are fitted
with lubrication lines extended to one side of the fan for ease of servicing and spacing.
Coils
Scott Springfield units are available with extends the air vent and drain fittings on the coil
steam, water, refrigerant and electrical coils to headers.
suit the application. Water and refrigerant coils
Cooling coil drain pans are double wall
are ARI rated. Electric coils are CSA/UL
insulated and of the drain dry variety. The pans
certified.
are double sloped to ensure positive drainage of
Solid liners are provided within coil any condensate to the “P” trap connection on the
sections and blanked-off to solid walls, thus unit exterior. A full intermediate drain pan is
avoiding the possibility of by-passing provided on all stacked coil arrangements. A
untempered air. Coil racks are designed for copper stand pipe drains the condensate from the
individual coil removal in a stacked upper coil drain pans into the lower pan. The
arrangement. Typically, a coil cover is provided external drain connections are steel NPT and may
opposite the piping connection side for removal be terminated on either side of the unit.
as required. To ensure access, Scott Springfield
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Mixing Sections
Mixing sections are designed for The design standard calls for parallel
effective blending of airstreams and eliminate blade dampers on the outside and return air to
stratification across coils and filters. Damper direct the air flows against one another and thus
velocities are optimized for pressure drop and improve mixing. (For those applications which
maximum blending effectiveness. Maximum have a restricted distance for mixing or have large
design velocity on mixing dampers is 1500 fpm temperature differentials between the outside and
(7.6 m/sec). return air, blenders are recommended.)
Access Doors
Full sized access doors are designed into Scott Springfield equipment to facilitate regular
maintenance requirements of the air handling unit. Standard door widths are 18"(457mm) and 24"
(670mm) however wider door widths are available for special applications.
The door is 2”(50.8mm) or 4”(101.6mm) double wall construction matched to the specified
casing thickness. A separate steel frame ensures the door swings easily without binding. A double seal is
used in addition to providing corner radius blank-offs to prevent leakage. The primary seal is a high
grade automotive bulb seal which retains flexibility under compression and insures the air tightness.
Windows are optional and provided on request. In addition, tool operated locks are available for projects
where restricted access into the equipment is required..
Ventlok® 310 door hardware operational from both sides of the unit is standard.
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Finish
All units are
finished with a primer
coat and then a coat of air
dried enamel. Units are
finished in the standard
production colour or to
suit a particular project
requirement. An optional
acrylic finish is offered
for applications requiring
a greater degree of corrosion or UV resistance. Refer to Scott Springfield engineering group for
particulars.
Quality Assurance
P. R . I . D . E .
Proven Record In Delivering Excellence
Scott Springfield Mfg. Inc. is committed to the achievement of excellence in quality, reliability,
and service provided. To insure the highest standards are maintained, Scott Springfield Mfg. Inc. has a
comprehensive Quality Assurance Program throughout the organization. The foundation of the program
is the dedication and pride of workmanship exhibited by all employees. We measure our success on your
satisfaction and welcome comments on our performance.
The employees of Scott Springfield Mfg. Inc.
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HQ Draw Software
Scott Springfield’s HQ Draw
software program, available through
local representatives, is based on the
catalogued data. HQ Draw enables
the designer to quickly model air
handlers and modify the overall
dimensions to suit the particular
project in a prompt and efficient
manner. Click and drop component
selection with comprehensive help
allows effortless design of Scott
Springfield air handlers.
Catalogue Material
The catalogue sections are grouped and identified by content. As an example, the tab on the side
(Section 2 Engineering Reference) and bottom (2-4) correspond the page to the section in the catalogue.
I.e. 2-4 refers to section 2 page 4. In the top right hand corner the title identifies the topic of the current
page. Within the page, the sections are divided by blue sub-headers, describing the topic of the individual
sections. Tables and figures are identified first by section then by order, i.e. 2-3, section 2 figure 3, not,
section 2 page 3. The five digit number on the bottom represents the catalogue reference number.
The first section, HQ Draw air handler components is a modular representation of the more
common options available. The dimensions have been established around the coil area required to
maintain 500 fpm (2.53 m/sec) at the nominal air volume listed for each size. The concise tabular format
enables the designer to readily select components needed to satisfy the design parameters of a project.
Footnoted material in the catalogue and contained in the HQ Draw help file detail acceptable
velocities, design considerations and other critical issues regarding the layout of an air handler. Scott
Springfield engineers design the equipment accounting for actual air pressure drop across various
components when selecting fans and specifying horsepower requirements.
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Standard Equipment Features
(cid:51) Double wall panel construction with 2"(50.8mm) or 4"(101.6mm) wall
depth provides added rigidity & sound attenuation.
(cid:51) Outdoor construction with standing seam sloped roof and rain gutters.
(cid:51) Welded structural base frame & multiple lifting lugs eliminate distortion
during handling & placing of equipment.
(cid:51) Welded floor and integral water dam prevents moisture damage to
insulation or building space.
(cid:51) Anti-slip textured epoxy floor finish.
(cid:51) Heavy gauge galvanized exterior - 16 gauge(1.519mm).
(cid:51) Liner - perforated & solid.
(cid:51) Internal spring isolation to meet seismic requirements, if applicable.
(cid:51) Fan options include plenum, DWDI, FC and axial to suit the application.
Fans belt guards, extended lubrication lines and L -80K bearing life.
10
(cid:51) Full sized doors provided to service components easily.
(cid:51) Solid blank-off for coils & filters assure no air bypass.
(cid:51) Coil banks designed for individual coil removal.
(cid:51) Double slope drain pans to meet IAQ standards.
(cid:51) Durable two part finish consisting of epoxy prime coat and enamel final
coat.
(cid:51) Recessed filter gauge.
(cid:51) Quality assurance through use of nationally recognized and certified
components to applicable standards such as ARI, AMCA. In addition units
are third party certified - CSA/NRTL .
System Capabilities to 100,000 plus CFM(47200 l/sec)
Features
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