Premier Industries, Inc.</small>
Project:
Equipment Schedule |
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HOUSING DIMENSIONS |
BLOWER |
EVAP. COOLING SECTION |
MANUFACTURER |
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QTY |
CFM
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HIGH |
DEEP |
SIZE 1 |
MOTOR 2 |
MEDIA3 |
EFF % 4 |
DEEP 5 |
PUMP 6 |
NAME |
MODEL |
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1. Size = wheel diameter. 2. Motor = horsepower. 3. Media = Glacier-Cor™ media. 4. Eff % = Saturation efficiency. 5. Deep = Media thickness. 6. Pump = Horse power
GENERAL: The evaporative cooler
shall be a self contained, single housing unit consisting of a minimum of an
“aluminum face louver with birdscreen” (or optional weather hood) “dry filter
section”, "wet section",
"fan section" and “ heating” system . The dry filters are 2”
throwaway type unless otherwise specified. The "wet section" shall
consist of cooling media, water delivery system and any selected accessories.
The "fan section" shall consist of a fan (blower), motor, drive
arrangement and any selected accessories to deliver specified air volume
against specified static pressure. The “heating” system shall be as specified.
The wet section and fan section shall be constructed from Stainless Steel grade
304 unless otherwise specified. A galvanized "C" channel type
undercarriage frame with lifting lugs shall be included.
·
1.0 HOUSING:
1.1 The "fan
section" shall be constructed from Stainless Steel, grade 304 natural 2B
bright finish or as otherwise specified. The entire housing shall be
constructed in one piece and supported on a "C" channel type
undercarriage frame, with lifting lugs, around the entire perimeter and
cross-wise under the wet section and fan section. The housing shall be
airtight and waterproof.
1.2 A lift-off or hinged
access panel shall be provided in the fan housing with an opening of 20"
wide X 60" high, or height of fan housing if less than 60" high.
The access panel shall be gasketed or formed to preclude air or water
leakage into the interior of the housing. The opening shall provide easy
access to the blower to allow for service of the motor, belt adjustment,
bearings and possible shaft replacement.
1.3 The wet section
(evaporative cooling module) shall be constructed from Stainless Steel grade
304 consistent with the fan section. It shall consist of a sump, sides
and top. A side lift-off or hinged panel for media access and service of
the float valve assembly for make up water shall be provided. Removal and
replacement of the media can be made through either a side lift off panel, top
removal, intake or discharge side of the section as specified. The wet
section shall be mechanically attached or welded to the fan section housing and
shall be supported across it's entire width by the under-carriage frame.
Internal components of the wet section shall be cooling media,
water delivery system, internal plumbing including a header pipe, make-up
water, overflow and drain fittings. Refer to section 3.0 for further
details.
1.4 The
heating system shall be as specified below.
1.5 The face
dampers and dry filters shall be as specified below.
·
2.0 FAN SECTION:
2.1 The blower (fan) shall be centrifugal type,
double width, double intake, forward curve or backward inclined as specified
and shall be capable of delivering air volume at total static pressure as specified.
The blower (fan) shall meet AMCA 210 standards and shall be mounted
in arrangement 3 configuration. The blower (fan) shall have a solid,
ground and polished steel shaft with a lubricable self-aligning type bearing on
each end.
2.2 Blower (fan) motor shall be
2.3 Motor mount shall be
adjustable to allow for drive belt tension and alignment.
2.4 Blower (fan) sheave
shall be non-adjustable v-groove type selected to provide necessary blower
(fan)
2.5 Motor sheave shall be
adjustable v-groove type selected to provide necessary blower (fan)
2.6 Vibration isolation
shall be provided under the blower (fan) and motor and shall be the spring
type. Isolators shall be selected for minimum deflection. Flexible
neoprene shall be attached between the blower (fan) discharge and the cabinet.
·
3.0 EVAPORATIVE COOLING MODULE (Wet Section):
3.1 The wet section
shall be constructed from Stainless Steel, grade 304. The outer housing
shall consist of a sump, sides and top. An externally mounted access
panel shall be provided for access to and adjustment of the float valve
assembly. The housing shall also provide a method of cooling media access
and removal. Standard removal method is through a side lift off panel
however, removal can be accomplished through removable rails on the intake and
discharge side of media when so specified. All metal in the wet section
shall be Stainless Steel, grade 304.
3.1a Sump construction
shall include TIG (fusion) welded corners and joints. The sump shall be
leak proof without the use of fillers, sealants or coatings. A media
support channel shall be included. This channel shall extend across the full
width of the media. The channel shall provide a minimum of 50% open area
for water to flow freely from the media into the sump.
3.1b An air bypass
inhibitor plate shall be provided from the intake bottom of the media and
designed to preclude any untreated air flow under the media.
3.1c Stainless Steel
couplers with female pipe thread shall be welded into the sump and side to
provide for make-up water, overflow and drain. Make up water coupler is ½”,
drain and overflow fittings are 1” unless otherwise specified.
3.2 Water distribution
system shall be pump re-circulating system with mechanical float valve assembly
to maintain water level in the sump. Pump horsepower and voltage requirements
shall be as specified in schedule. A bleed-off system with metering valve
shall be provided when the pump system is used. Bleed-off rate shall be
minimum of 20% of evaporation rate. Pump shall be sized to deliver water
flow rate at the head and pressure required. Flow rate shall be determined at
three (3) times the evaporation rate plus the bleed-off rate. Pump
housing must be glass filled thermoplastic or polypropylene construction
with cast bronze or polypropylene impeller and shaft.
3.2a Internal plumbing
shall be PVC schedule 40 sized to meet flow rate demand unless otherwise specified.
A balancing valve and visual readout flowmeter shall be provided in the
riser pipe between the source and header to regulate water flow over the media.
Header pipe shall contain drilled and cleaned orifice holes sized to
assure proper water flow over the media. Water from the header pipe shall
be discharged upwards against a stainless steel deflector to redirect the water
from the header pipe back onto the media, evenly across its' full width. A
PVC union shall be provided in the riser pipe below the header pipe to
facilitate removal of the header pipe.
3.3 Cooling media shall be
CELdek® or Glacier-Cor(tm) rigid media, 12" thick or as
specified. This media is a cross- fluted pad
of cellulose material impregnated with anti-rot salts and rigidifying saturants
and wetting agents with at least 123 square feet of evaporative surface area
per cubic foot of media. The transverse flutes shall be 450
and 150 with water flow in the direction of the 450 flute
against the air flow and air flow in the direction of the 150 flute
with the direction of air flow. Media shall have no more than .315"
w.g. air pressure drop at 500 feet per minute face velocity and shall develop a
saturation efficiency of not less than 90% for 12" thick media.
3.3a Media access and
removal shall be accomplished through a removable side or top panel provided
for this purpose or from the intake or discharge side of the media by removing
retaining rails provided for media support and removal purposes as specified.
4
HEATING SECTION:
4.1 Heater shall be indirect gas
fired, outdoor type with stainless steel heat exchanger and all necessary
electrical controls including automatic re-light and spark ignition. Gravity vent is standard with power vent
available as an option. Burner is to be slide-out
design and corrosion resistant construction.
Manufactured by Reznor, Greenheck or equal.
FACE LOUVER PANEL:
Face
louver panel shall be provided and shall be constructed from aluminum, alloy
5052, and shall contain birdscreen attached to the downstream side of the panel
frame to cover the entire face area of the unit. Louver panel shall be as
manufactured by Premier© with welded panels to frame, or equal.
BIRDSCREEN:
Birdscreen
shall be provided to cover the entire intake area of the unit and shall be
constructed from aluminum perforated sheet with maximum 1/4" holes (or
optional, galvanized 1/2" x 1/2" opening). Open area shall be less than 76% of the
birdscreen face area.
DRY FILTERS:
A
dry filter stage will be provided to cover the entire intake face area of the
cooling module. Filters are extended
surface, pleated type, Farr model 30/30 or equal with 30 - 35% average
efficiency, 2" thick throwaway, replaceable type with maximum velocity of 500 FPM or
filter type as otherwise specified.
Initial resistance is maximum of .26" w.g. at 500 FPM.
Filters shall be removable from the
intake side of the frame using Premier's © bracketless lift and remove rack system or side removable from a
hinged panel provided for this purpose or as specified..
End of Standard
Specifications:
·
ACCESSORIES: BELOW ACCESSORIES
(Select
desired accessory items below, copy and paste to proper location above in this
specification)
Note : Contact manufacturing
plant for further detail or assistance at
ACCESSORIES
(OPTIONAL):
ELECTRICAL CONTROLS:
Electrical
controls shall consist of a minimum of a fused disconnect located at the unit
and a magnetic across the line starter and separate contactor to control water
distribution. The electrical controls housing shall be NEMA 3 for indoor
units and NEMA 3R for outdoors installation.
A
low water level protection system similar to Premier model LWLS-1, or equal
shall be used when the pump system is used.
MOISTURE DRIFT ELIMINATOR:
A moisture drift eliminator stage will be
provided to prevent entrainment of water droplets in the air stream from the
cooling media. The eliminator medium
shall be 5-1/4" thick, PVC construction similar to Premier MDE-5 or
Munters® Corp., Drifdek™, or equal.
WASHABLE DRY FILTERS:
A dry filter stage will be provided to cover the entire intake face area of the cooling module. Filters are washable with aluminum mesh media, 2” thick.
VARIABLE
A variable frequency drive controller is provided to control
fan speed by selecting any frequency (Hz) from
15 Hz to 66 Hz. This allows the
use of 60 Hz motors which can then be operated at any frequency. Controller shall be as manufactured by
INTAKE HOOD (WEATHERHOOD):
Intake
hood shall be provided as manufactured by Premier™, or equal with reinforcing
struts as required. Hoods shall be
constructed from stainless steel or painted galvanized steel, consistent with
unit housing material.
MAGNEHELIC GAUGE:
Magnehelic
differential pressure gauge shall be provided to measure the pressure drop
across the cooling media to indicate the change in the resistance to air flow
which relates to the cooling media condition.
The detector tubing shall be placed immediately upstream and downstream
of the media. Gauge shall be mounted
externally on the unit for manual reading of the pressure drop.
AUTOMATIC FLUSH SYSTEM:
Automatic
flushing of the cooling media shall be accomplished by injecting fresh water
over the top of the cooling media on a pre-set timing cycle. During the flush cycle, a make-up water
solenoid is opened to deliver water across the top of the cooling media for a pre-set
time. At the end of the timing cycle,
the make-up solenoid will close. Excess
water entering the sump will flow out the overflow to the drain. The flush system shall be Premier© AF-1 or
equal with complete electrical controls.
TOTAL DISSOLVED SOLIDS SYSTEM (
A
"total dissolved solids" monitoring system complete with electrical
controls and sensors shall be provided.
The system must be capable of measuring electrolytic conductivity in the
sump water and automatically initiate a water dump action to drain the sump to
a degree sufficient to restore an acceptable
FREEZE PROTECTION SYSTEM:
Freeze
protection for the unit shall be provided to prevent damage to the unit due to
freezing. Protection system shall
consist of a minimum of thermal controller, drain solenoid, make-up water
solenoid and associated electrical control system. At temperature drop to pre-set (usually 400
(f)) level, the system will shut off the supply water, open sump drain solenoid
and shut off pump. On temperature rise
to pre-set (usually 50 - 60 0 (f)) level, the unit will be
re-activated by the reverse action above.
The pump will be delayed on start until the make-up water has filled the
sump to a safe level. Protection system
is Premier© FP-1 or equal.
REMOTE ELECTRICAL CONTROLS:
Remote
control unit to allow selection of unit operation mode is to be provided. Control shall include minimum of
"ON", "OFF", "
THERMOSTAT CONTROL:
A
thermostat control to activate and de-activate the pump contactor on pre-set
temperature levels shall be provided for automatic remote operation of the
unit.
TEMPERATURE MONITORING SYSTEM:
Thermal
sensors shall be placed immediately upstream and downstream of the cooling
media to indicate entering and leaving dry bulb temperatures. The read out gauges shall be mounted
externally on the unit.
A
flowmeter shall be mounted in the riser pipe above the balancing valve on the
pressure side of the pump. The flowmeter
shall be clear glass with
Accumulating water flow meter shall be provided to measure the total amount of water being supplied to the unit. The flowmeter shall be mounted in the make-up water supply line in a location that is freeze proof and accessible for reading the meter.
FLOWMETER (DRAIN WATER VOLUME
ACCUMULATING):
Accumulating
water flow meter shall be provided to measure the total amount of water being
drained from the unit. The flowmeter
shall be mounted in the drain line in a location that is freeze proof and
accessible for reading meter.
MAKE-UP WATER INJECTION SYSTEM:
The
make-up water shall be directed through a solenoid valve to a special header
pipe across the top of the cooling media.
The header pipe shall have self-cleaning 5/32" diameter orifice
holes on 2" centers to discharge the fresh make-up water upwards to
impinge on the water deflector and back downwards onto the cooling media. The water will then flow through the cooling
media to replace the sump water lost to evaporation and/or bleed-off. The mechanical float and valve assembly will
be used as a quick-fill provision for initially filling the sump or as
needed. The make-up water shall be controlled
by a switching method to activate and de-activate the solenoid based on the
sump water level. This method of water
make-up is to maximize the use of fresh water over the cooling media while
automatically flushing particulate from the media. The system shall be as manufactured and
installed by Premier© and identified as
ELECTRIC HEAT STRIP:
An
electric heat strip shall be provided with electrical controls. Design is temperature rise of 30(f) degrees
minimum
End
of optional accessories section.
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