Industrial Evaporative Cooler

PCEC-	RANGE	WIDE	HIGH	DEEP	DIA¹	.25	.5	.75	1	1.25	1.5	1.75	2	2.5	THICK	DRY	OPER.
60	4500-6500	52	41	54	18	1	1.5	1.5	2.0	3.0	3.0	5.0	5.0	5.0	12	520	565
80	6500-9500	52	53	60	20	2	2	3	3	5	5	5	7.5	7.5	12	770	975
120	9500-12500	62	60	64	22	3	3	5	5	5	7.5	7.5	7.5	10	12	920	1175
160	12500-16000	68	67	72	25	3	5	5	7.5	10	10	15	15	15	12	1145	1480

Note: Grey shaded area indicates standard motor horsepower.

Specifications

GENERAL: The evaporative cooler shall be a self contained, single housing unit consisting of a minimum of a "wet section" and "fan section". 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 wet section and fan section shall be constructed from Stainless Steel grade 304 unless otherwise specified.

1.0 HOUSING:

1.1 The "fan section" shall be constructed from Stainless Steel, grade 304 natural 2B bright finish. The entire housing shall be constructed in one piece and supported on special designed hat sections built into the housing floor. 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 formed to preclude air or water leakage into the interior of the housing. The opening shall be in line with the blower to allow for service of the motor, belt adjustment, bearings and possible shaft replacement. Double access panels (one full size panel on each side of dry housing) are available as option.

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 panel for media access and service of the float valve assembly for make up water shall be provided on model 160. A top removable panel is provided for other models. Removal and replacement of the media can be made through either a side lift off panel or top removal. The wet section shall be permanently attached to the fan section housing by mechanical fasteners or welding.

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.

· 2.0 FAN SECTION:

2.1 The blower (fan) shall be centrifugal type, double width, double intake, forward curve as specified and shall be capable of delivering air volume at external static pressure as specified. The blower (fan) shall be tested in accordance with AMCA 210 standards and shall be mounted in arrangement 3 configuration. Standard discharge mode shall be horizontal. 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 ODP (open drip proof) or TEFC (totally enclosed fan cooled) type as specified and sized to drive the blower (fan) at specified capacity without exceeding nameplate rating. Service factor of the motor shall be 115% of nameplate rating. Electrical characteristics of the motor shall comply with available electrical service as specified.

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) RPM.

2.5 Motor sheave shall be non-adjustable v-groove type selected to provide necessary blower (fan) RPM.

· 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 or removable 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 on model 160. Top removal is provided on the other models. 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 with punched holes on a staggered pattern 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, extending into the water 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 (1/2"), overflow (1") and drain (1).

3.2 Water distribution system shall be pump re-circulating system with mechanical float valve assembly to maintain water level in the sump. Standard motor voltage shall be 208/230-460, 3 phase, 60 hertz. Motor horsepower shall be as noted in the schedule. A bleed-off system with metering valve shall be provided. Bleed-off rate should be set at 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. Pump voltage shall be 120/1/60.

3.2a Internal plumbing shall be PVC schedule 40 sized to meet flow rate demand unless otherwise specified. A balancing valve 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) super saturation rigid media, 12" thick or equal. 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 and air flow in the direction of the 15⁰ flute. Media shall have no more than .28" 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. Model 160 uses a side lift off panel and the other models include a removable top panel.

End of Standard Specifications:

· ACCESSORIES:

(Select desired accessory items below, copy and paste to proper location here or above in this specification)

Note : Contact manufacturing plant for further detail or assistance at 800-254-8989 or e-mail piec@aol.com or fax 602-997-5998.

ACCESSORIES (OPTIONAL):

ELECTRICAL CONTROLS:

4.1 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.

LOW WATER LEVEL PUMP PROTECTION:

A low water level pump 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.

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.

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.

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.

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.

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 (TDS CONTROLLER):

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 TDS level of the sump water. System is to be Premier© model TDS-SYS A or equal.

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", "COOL", "VENT ONLY" and "PUMP ONLY" selections and shall include panel lights to indicate the current active mode of operation.

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.

FLOW METER (PUMP FLOW RATE):

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 GPM scale for setting the water flow rate.

FLOW METER (MAKE-UP WATER VOLUME ACCUMULATING):

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 MWI system.

End of optional accessories section.

- 5 -

Commercial Evaporative Cooler Specifications

STANDARD COMMERCIAL COOLERS

DELIVERYCFM

RANGE

Specifications