INSTALLATION, OPERATION AND MAINTENANCE MANUAL

Table of contents Safety Considerations ............................................................................................... Warning ........................................................................................................................... Use .................................................................................................................................... Receiving ........................................................................................................................ Location .......................................................................................................................... Recommended number of units .................................................................................. Schematics ....................................................................................................................... CFM table ....................................................................................................................... Filtration ......................................................................................................................... Longevity ........................................................................................................................ Operating range ............................................................................................................. Drive System .................................................................................................................. Sealing Material .............................................................................................................. Heat Source .................................................................................................................... Wheel Maintenance ...................................................................................................... Lifecycle Testing .............................................................................................................

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P.3 P.3 P.3 P.3 P.4 P.5 P.6 P.7 P.8 P.8 P.8 P.9 P.9 P.9 P.10 P.11

Safety Considerations: Installing, starting up and servicing equipment can be hazardous due to system pressure (when supplied with refrigerant heat recovery), electrical components and equipment location (ceiling mounting or elevated structures, etc.). Only trained qualified installers and service mechanics should install, start-up and service this equipment. When working on the equipment, observe precautions in the literature and on the tags, stickers and label attached to the equipment. Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging and setting bulky equipment.

WARNING: Before installation, always check to be sure main power to system is OFF. Electrical shock can cause personal injury or death.

Use: RefPlus Desiccant Dehumidifiers are intended for mass transfer of water vapor in skating, curling and some cold room applications. RefPlus desiccant wheel have been engineered for maximum durability under severe operating conditions.

Receiving: Examine for damage incurred during shipment. File a claim immediately with Transit Company if damage is found. Verify that the nameplate electrical requirements match the available power supply. Check the shipment for completeness.

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Localisation: All E-DryPlus should be installed on a platform with sufficient service area around the unit for safe maintenance. A minimum of 40’’ (1M.) is required on 2 sides. The unit must be level. When deciding on the location of the unit consider the following: •

The supply air must be toward the seating area, never toward the ice. Discharge plenum are available to direct the air.

• When two units are provided, they should be at opposing corner for an efficient air movement.

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•

When only one unit is provided, make sure that the leaving air moves around the whole area. Flexible duct connection are available for a proper air movement.

•

Some CFM adjustments on the supply side is possible. Refer to the CFM tables on the next page

•

Locate the unit close to an outside wall to reduce the regeneration duct length. Ad justable drive is provided for a maximum of? Ft of ducts. Optional drive and motor can be supplied for longer ducts.

Recommended number of DDE-2500-E20 vs applications: Description  Curling, up to 8 sheets Skating rink up to 500 spectators one side  Skating rink up to 1500 spectators 4 sides 

E20 1 1 2

Note: •

Based on 40F/4C at 60% RH for curling application no spectator

•

50F/10C at 60% RH for skating rinks.

•

Using DDE models 50% or less humidity can be achieved with good efficiency.

•

For lower % RH use E30 models or E20 with heat recovery.

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Regeneration fan CFM/Static pressure table  CFM: 650    Standard unit no recovery or heating heat exchanger  External S.P.  0.2''  0.3''  0.4''  0.5''  RPM +‐3%  1106  1155  1201  1247 

  0.6''  1293 

0.7''  1335 

0.8''  1378 

0.9''  1419 

1.0''  1459 

Unit with recovery or heating heat exchanger    External S.P.  0.2''  0.3''  0.4''  0.5''  0.6''  0.7''  0.8''  0.9''  1.0''  RPM+‐3%  1247  1293  1335  1378  1419  1459  1499  1538  1575  Note:   Ducted outlet, air inlet temperature 90°F/32°C, 0.93'' internal static pressure     For 10'' diameter flexible ducts,  use 0.42''/100' equivalent length.     For 10'' diameter metal ducts,  use 0.22''/100' equivalent  length.     Pulley adjustements  Turn open  RPM 

  0  1575 

1  1475 

2  1375 

3  1275 

4  1175 

5  1075 

   

Return/Process fan CFM/Static pressure table  Ducted outlet, air inlet temperature 55°F/13C°        CFM  I.S.P.  0.0''  0.1''  2250  0.8''  768  760  2500  0.91''  826  810  2750  1.02''  884  857  1 HP motor       1.5 HP motor      

 

Pulley adjustements  Turn open  RPM 

  RPM +‐ 3% at External S.P.   0.2''  0.3''  0.4''  0.5''  800  838  874  909  846  881  915  948  890  923  955  986 

0.6''  944  980  1017 

0.7''  978  1012  1047 

  0  1058 

 

1  1000 

2  942 

3  884 

4  826 

5  768 

   

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Filtration Atmospheric contaminants, exposure to acidic gasses or airstream in contact with petroleum based airborne particulates reduce the adsorption capacity of RefPlus desiccant wheel. ASHRAE 30% minimum rated filters should be used to minimize the effects of dust and airborne particulates on longevity of the wheel. Theses filters, minimum of 2’’ pleated type must be used for both the process and regeneration air streams. Optional filter racks are available for improved filtration.

Longevity When used with properly selected and maintained filtration and in areas of low ambient pollution, the RefPlus desiccant Dehumidification units are designed for 87,600 hours (10 years) of continuous use. This longevity statistic is based on maintaining 90% minimum of full rated performance.

Operating range The RefPlus desiccant Dehumidification units has been designed to provide maximum moisture transfer for ice rink and some low humidity refrigerated room applications. RefPlus designs consider wheel rotational speed, reactivation/ process face velocity, reactivation configuration and entering conditions as well as desired leaving conditions to achieve optimum wheel performance. RefPlus desiccant wheels may not be operated with condensate in direct contact with the wheel faces i.e. under «wet» conditions, but may be washed, for cleaning purposes, when removed from the unit. See ‘Wheel Maintenance» for more information about washing wheels.

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Drive System Starting torque is usually limited to a maximum of 60 lbs. ft. RefPlus uses heavy duty gear motor drives to ensure long drive system life. Drive motor/ gear selection limit total force applied to the circumference of the wheel at (00 lbs. ft. to prevent distortion of the desiccant wheel outer band. Exceeding 100 lbs. ft. at the wheel circumference may damage the desiccant wheel outer band and/ or desiccant media. Additionally, since belts used for standard drive units may stretch and slip in operation or when heat is applied, RefPlus use a spring loaded automatic tensioner.

Sealing Materials The RefPlus desiccant wheel has been designed to provide a smooth flat sealing surface. The faces of desiccant wheel will wear the installed seals over a period of time, and seals should be Teflon coated to extend longevity. In its standard design, RefPlus uses silicone bulb type seals which have been Teflon coated at the reactivation to process «split,» and are graphite coated at the wheel circumference.

Heat Source RefPlus desiccant wheels are reactivated using electric resistance (indirect) steam, (indirect) hot water. Additionally, recovered refrigeration heat may be utilized. All heaters are equipped with suitable safety devices and controls to prevent exceeding temperature limitation. Reactivation flow and wheel rotation must be maintained at all times the heater is in operation.

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Wheel Maintenance •

Routine Maintenance

RefPlus desiccant wheels are designed for minimal maintenance over their operating lifetime. On an annual basis, the faces of the wheel should be checked to ensure no apparent dirt, debris or damages are present. If desiccant wheels are used with proper filtration, the corrugated flow channels will have a minimum of dirt and dust build up. This inspection should be done at normal intervals, coincident with seal replacement. RefPlus also generally recommends this lubrication procedure at a minimum of every 16,000 hours of operation to extend seal life. Contact the Factory for lubricant part number and application procedures.

•

Cleaning the Wheel

In the event that routine annual inspection, the wheel need cleaning, the wheel cleaning is required as follows: Using 20 psig clean dry air, and a small air nozzle, blow air through one face of the wheel. At a similar location on the opposite side of the wheel, gently apply a shop vacuum to receive debris exiting the wheel. Slowly work around the entire face of the wheel to complete the procedure. In the event that this method does not remove visual buildup or return pressure drop to within normal parameters, contact the factory for a wheel washing procedure. Do not use solvents or any other cleaning fluids on the face of the wheel. Additionally, although the desiccant wheel may be washed in a clean water solution, special precautions are required to ensure adequate drying of the wheel to prevent damage to sensible internal surface.

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Lifecycle Testing The desiccants impregnated in RefPlus desiccant wheels are highly stable silica-gel. However, exposure to certain chemicals can result in a decrease in wheel performance. Wheels are subject to pore contamination from any sodium salts and most chlorides. Also, strong alkaline solutions will reduce the effective pore surface area of the silica-gel. Wheels will suffer from contamination when exposed to oil mists and irreversible dissolution of the desiccants will occur when exposed to strong reducing agents (e.g. Hydrazine). If a consumer suspects that a RefPlus wheel has be damaged during operation, or cannot otherwise trouble shoot poor performance of the wheel, then RefPlus may perform a lifecycle test on the wheel. Upon request, RefPlus will provide a small sample kit, enabling the customer to remove a small sample of the wheel material. This material is to be returned to RefPlus for detailed chemical analysis. These tests may confirm damage to the desiccant, indicate the end of useful life, or otherwise provide data necessary to determine additional actions. There may be a small fee for this service. Contact RefPlus for details on this procedure and sample kit part number.

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USA & CANADA 1-888-816-2665 / refplus.com 2777 Grande-Allée,Saint-Hubert, Québec,Canada,J4T 2R4 T 450 641-2665 F 450 641-4554

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IOM-DDE-En-03/16-R0 RefPlus Inc. reserves the right to make any changes in the design or specifications of any product at any time without notice. © Copyright 2016 by RefPlus Inc.