Table of Contents
Troubleshooting
Summary of Contents for sereco NE Series
- Page 1 Seresco: (pronounced Sir-ES-co) meaning “to become dry” Installation and Operation Manual NE Series Dehumidifiers For NE-208-232 Models: PV, NV, PH and NH Configuration Natatorium Dehumidifiers NC Series Outdoor Air-cooled Condensers...
- Page 2 CAUTION ONLY TRAINED, QUALIFIED PERSONNEL SHOULD INSTALL AND/OR SERVICE SERESCO EQUIPMENT. SERIOUS INJURY AND PROPERTY DAMAGE CAN RESULT FROM IMPROPER INSTALLATION/SERVICE OF THIS EQUIPMENT. HIGH VOLTAGE ELECTRICAL COMPONENTS AND REFRIGERANT UNDER PRESSURE ARE PRESENT 1-888- SERESCO (737-3726) Additional copies of this manual can be downloaded from: www.seresco.net Seresco Technologies Incorporated 1283 Algoma Road, Unit 1...
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Page 3: Table Of Contents
TABLE OF CONTENTS 1. Introduction ..............………………....…… 4 Packaged Mechanical Refrigeration Systems..........…..…… 5 NE Series Dehumidifier features……..........…..…………… 6 2. Installation .................………….…………….. 2.1 Uncrating and Inspecting..................….…… 7 2.2 Mounting and Service Clearance………………………….........…… 7 2.3. High Voltage Electrical Connections ..............…….. 8 2.3.1 Wire and Fuse Sizing................…… 8 2.3.2 Line Voltage Connections..............….……... -
Page 4: Introduction
Figure 1 shows that relative humidity levels Seresco Technologies Inc., manufacturer of the outside the 40%- 60% range can result in NE Series of natatorium air quality control increased human susceptibility to disease from systems is dedicated to providing state-of-the-art... -
Page 5: Packaged Mechanical Refrigeration Systems
The type of facility being designed dictates the 1.1 Packaged mechanical refrigeration space temperature. Table 1 helps target some By far the most common and popular system. typical conditions. It is critical to understand who method of removing moisture from the space, these will be using the facility in order to deliver the are packaged refrigeration units like those built by conditions most likely to satisfy them. -
Page 6: Ne Series Dehumidifier Features
6 - Compressors: The NE Series is equipped with robust high-efficiency scroll compressors. 7 - Direct driven blowers: No belts to adjust or maintain! The motor is even out of the air stream. -
Page 7: Installation
(with the logo on it) and opposite dehumidifier in all operating modes before it end of the NE series dehumidifier for piping, ships from the factory. The unit can suffer duct connections, and service access. damage in transit. Check the equipment thoroughly for both visible and concealed damage before you sign the receiving papers. -
Page 8: High Voltage Electrical Connections
Figure 7 – Power Wire Connection 2.4. Control Wiring The NE Series dehumidifiers have all necessary sensors unit mounted and set points pre- programmed at the factory. Remote duct heaters, outdoor air-cooled condensers, auxiliary pool water... -
Page 9: Controller And Programming
Service Solid Yellow indicates that the NE The keyboard/display panel is shown in Figure Series unit is in Service Mode. 9 and is located on the NE Series unit at the Flashing Yellow indicates that the mechanical compartment access. The LCD... -
Page 10: Normal Mode And Programming
2.5.1 Normal Mode: Menus and selections are accessed using the “1-6” numbered keys – each menu item and parameter is preceded by a number from 1 to 6. When the scroll keys can be used to access additional menu items they will appear on the screen ( and ). The same scroll keys are used to change values after a parameter has been selected. -
Page 11: Logs
Please contact factory for can assist an owner or service technician in additional information. understanding his NE Series unit is doing at any given moment. 2.5.3 Logs This feature is accessed through the menu... -
Page 12: Sensors And Locations
2.5.5 Sensors and location. Figures 11 & 12 identify where the sensors are located in the NE Series units. Each sensor is accessible through the Command Center or Web Sentry. Sensor history is stored and can be reviewed in tabular form. -
Page 13: System Design Overview
access (the deck area for example) will suffer Ensuring 2.6. System Design Checklist. from poor air quality and lead to complaints. that all critical system design aspects have been addressed is paramount to obtaining a safe and Traditional problems in indoor pools are easily healthy pool environment. -
Page 14: Evaporation Rate And Latent Loads
Galvanized sheet metal ducts are No Access = no service or maintenance. acceptable in most installations. A All NE series dehumidifiers have been below-grade duct system should use designed to require only two sides access. PVC or plastic-coated galvanized spiral Allow a minimum of 36 inches of clearance pipe to avoid deterioration. -
Page 15: Exhaust Air
Most designers use the larger of A quick calculation will determine the supply air the two values. requirement. Nominal air flows from NE series units are summarized in Table 3. Seresco suggests that only the wet deck (a 5-6’ perimeter) be considered in this calculation, as Supply air required (CFM) = [room volume (ft³) x... -
Page 16: Condensate Drain
Without a trap, condensate will not drain and the unit will overflow into your mechanical room. The NE Series units have an outdoor air opening Per Figure 18 pitch the condensate drain line with a filter and manual balancing damper. -
Page 17: Pool Water Piping Diagram
Figure 19 – Proper Pool Water Piping Installation... -
Page 18: Outdoor Air-Cooled Condenser Installation
Condensers oxidation in the pipes. Keep the Hot Gas and Liquid lines a 1. NE series dehumidifiers are equipped minimum of 2” apart to prevent heat with isolation valves and access valves transfer. Insulate the hot gas line in all located in the blower compartment. -
Page 19: Charging Of Remote Condensers
Figure 21 – Typical Outdoor Condenser Installation the length of the piping. The unit nameplate 50’ line Factory Factory will show the exact field charge required. contractor Charge Refer to Table 5 to determine the necessary Model charge Charge (Lbs) charge for your application. -
Page 20: Pool Water Chemistry
Seresco has taken all possible commercially pools is NOT the result of too feasible precautions to protect the NE Series much free chlorine in the water; it units against the corrosion caused by is TOO LITTLE free chlorine that is accidentally high chemical levels. -
Page 21: Start-Up Procedures
11. Ensure all peripheral controls and 4. Start-up Procedures sensors are connected and wired 4.1. Pre Start-up correctly. A complete start-up is required to ensure all 12. Verify that all service valves in the systems have been setup and adjusted to refrigeration lines are fully open. -
Page 22: System Operation Modes
the unit is dehumidified and about 15F 4.3. System Operation Modes cooler than when it entered. The standard sequence of operation for a Seresco dehumidifier is relatively simple. Air Conditioning Mode Stage 1 Whenever the compressor operates the evaporator coil is active where it absorbs The return air temperature is above heat from the warm, humid air stream. -
Page 23: Compressor Start Sequence
4.3.6 Compressor Start Sequence 5.1.2 Annual Service All NE units have a pump down sequence Tighten all field and factory electrical and anti-short cycle timer. When a demand connections. requires the compressor to operate the Verify that the coils in the dehumidifier ... -
Page 24: Service References
Verify that the TX Valve and solenoid 6. Service References valves are free of debris. Clean or replace them as necessary. The unit 6.1. Nameplate/Factory Label. Replace the suction filter with a suction nameplate (Figure 24) and is attached to the line filter-drier designed specifically for outside of the electrical box door. -
Page 25: Mechanical System Troubleshooting
6.2. Mechanical System Troubleshooting Issue Possible Cause Remedy Firestat contact closure Check firestat switch Check for tripped circuit Loss of main power breaker or blown fuses Manually shut down on Restart controller Check for loose or incorrect Supply blower will not start Faulty control wiring wires on system and controller Check for loose or faulty wiring... - Page 26 Keep head pressure above Head pressure too low 200 PSI by adjusting head pressure regulator Check register locations for short-cycling of air. Return air % RH level too low Check setpoints; unit should not be operating. Evaluate system air flow Check for dirty filters or restricted ductwork Low Suction pressure...
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Page 27: Microprocessor Troubleshooting
Ensure all exterior windows Poor air distribution see 3-5 CFM/ft² of glass over their entire area Airflow across evaporator is Check bypass damper too high. Coil only doing operation. Ensure fully open or Unit operates but windows sensible cooling recalibrate in Service mode. have condensation Re-evaluate unit sizing. -
Page 28: Blower Adjustment Procedure
6.5.2 Typical Unit Operation Parameters. There are several variables that impact unit 6.4.2 Internal Static Pressures (ISP). The standard NE Series unit is configured performance. If the unit is operating within for ¾” - 1” External Static Pressure (ESP) the parameters listed in Table 8, the depending on options. -
Page 29: Factory Start-Up Supervision
Typical Unit Performance (For R 22 units) Water Heat & Water Heat & Dehumidification Conditioning Dehumidification Supply Air ºF ºF ºF ºF + (10 – 15) - (10 – 15) - (10 – 15) + (0 – 3) Temperature change ºF ºF ºF... -
Page 30: Warranty
6.7 Warranty Products that have become defective or damaged as a result of the use of a General Policy contaminated water circuit or operation This warranty applies to the original at abnormal water temperatures and/or equipment owner and is not transferable. flow rates. - Page 31 NE Series warranty however, in such case the balance of the but applied to the coil only.
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Page 32: Refrigeration Diagrams
6.8 Refrigeration Diagrams Figure 26 – Refrigeration Diagram – Basic unit and Outdoor Condenser Figure 27 – Refrigeration Diagram – Pool Heating and Outdoor Condenser... -
Page 33: Field Wiring Diagram
6.9 Field Wiring Diagram 6.10 Typical Electrical Panel Layout... -
Page 34: Warranty Registration And Start-Up Report
6.11 Start Up and Warranty Registration Form Project Name __________________________ NE Series Model _____________________ Location _______________________________ Serial Number _______________________ Jobsite telephone number ________________ Compressor Serial # __________________ Seresco Representative _________________ Voltage on site _______________________ Electrical Data L1 – L2 L2 – L3 L1 –... - Page 35 Total line length to OACC or Outdoor Air cooled condenser or Dry Cooler…………………………. Dry Cooler location: ……. ft [above / below] Seresco unit Hot gas line size……………….….. If above, oil traps installed: [yes / no] Liquid line size…………………….. ...
- Page 36 Your local Seresco representative: ystem design and air flow pattern vaporation rate and latent loads equired Access Space xhaust Air Design upply Air Checklist ooling and Heating loads utdoor Air Project: ____________________________________________________________________ Reviewed by: ________________________________________________________________ ystem design and air flow pattern upply Air All exterior windows, doors and skylights System delivers 4 air changes per hour...
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