Seresco NE Series Operation And Maintenance Manual
Compact outdoor dehumidifiers
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Summary of Contents for Seresco NE Series
- Page 1 NE Series – Compact Outdoor Dehumidifiers Operation and Maintenance Manual Seresco SerescoDehumidifiers.com ...
- Page 2 Seresco NE Series – Compact Outdoor OMM September 2020...
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Page 3: Table Of Contents
25 25 Touch Display Operator Panel 26 Alarms 27 Remote Communication Basic Maintenance 28 28 Maintenance and Safety 28 Maintenance Key Points 29 Routine Maintenance Program 30 Specific Components Maintenance Chapter W ‐ Warranty 32 September 2020 Seresco NE Series – Compact Outdoor OMM... -
Page 4: General Information
General Information This manual provides basic information about the applicable Seresco dehumidifier and its operation. Important information regarding installation, maintenance, and start up as well as additional and auxiliary systems and devices (outdoor condenser, communication interfaces, etc.) is normally provided with the dehumidifier and can also be obtained at Seresco (see Contact Us below). Operating Safety (Warnings, Cautions, and Notes) FOR YOUR SAFETY: READ BEFORE PERFORMING ANY OPERATIONS, MAINTENANCE OR SERVICE TASKS! Only qualified technicians should install, operate, maintain or service mechanical equipment including current dehumidification system. Make sure to read this manual before performing any tasks to familiarize yourself with the equipment as well as with any potential hazards. Always exercise caution! Beware of electrical power and high electrical voltage! • Follow proper safety procedures – lockout, tagout, and other respective procedures • Failure to follow safety procedures can result in serious injury or death Beware of moving parts and hot surfaces! • Make sure to stop all moving parts (fans, blowers, etc.) before accessing the equipment’s internal space • Be aware of hot surfaces (hot refrigeration, space heating pipes, coils, heaters, etc.) Beware of high pressures and chemicals! • Dehumidifiers, equipped with compressors, contain refrigerant under high pressure; oil is also contained in the compressor and refrigeration circuit(s) • Some dehumidifiers may also contain other liquids such as glycol mixtures and pool water ... -
Page 5: Reference And Additional Information
Any work (installation, start up, service, maintenance, repair, etc.) on any mechanical equipment (dehumidifier, outdoor condenser, fluid cooler, etc.) must be performed in accordance with respective manufacturer’s recommendations as well as submittal documentation, local Codes and Regulations, and appropriate field practices. Failure to do so could result in personal injury, equipment damage or malfunction, and will void equipment warranty. Only qualified and properly trained individuals should perform tasks on this equipment. Attention: Maintenance Team CAUTION. To ensure equipment longevity and proper and efficient operation, the dehumidifier and its auxiliary systems and devices (outdoor condenser, fluid cooler, boiler package, etc.) should be maintained properly and regularly. Failure to do so could negatively affect premise comfort levels and people’s health. It could also lead to equipment damage, malfunction, premature tear and ware and may void equipment warranty. Contact Us 1‐833‐DAS‐POOL (327‐7665) Seresco 1071 Ages Drive Schedule / Modify a Start‐up: Ottawa, ON K1G 6L3 Startups@DehumidifiedAirServices.com Canada Inquire about Warranty: SerescoDehumidifiers.com Warranty@DehumidifiedAirServices.com Order Parts: Parts@DehumidifiedAirServices.com All Other Product Support: Support@DehumidifiedAirServices.com ... -
Page 6: Basic Information
Optional Space Heating ‐ hot water coil, electric or gas heater ***. Packaged Air Conditioning (AC) option – built‐in Outdoor Air‐Cooled Condenser (OACC).**** Pic. C.1‐L Dehumidifier Options – SLX Cab: Outdoor, single‐compressor dehumidifiers, 4 to 20 ton cooling capacity (apprx.) ‐ models NE004 to NE020*. * All available options for 4‐7 ton units (ductwork connections, other options) are shown. Refer to the submittal and other relevant documentation for your equipment options, dimensions etc. ** The pool water heating option relies on compressor‐created excess heat and is used as an additional heating source. It does not eliminate the need for a main pool water heater. *** For specific details on space heating (hot water, gas, electric) option, refer to the submittal and other documentation: Electric heater or hot water coil, depending on (capacity, model, size, etc., can be installed externally (fitted in the supply air ductwork) or internally. Refer to your dehumidifier’s submittal documentation Gas‐fired heater can be installed externally (within supply ductwork). Alternatively, the dehumidifier could be provided with Outdoor Gas Heater package (dehumidifier with package is shown on Pic. C.2‐L below): **** Built‐in (packaged) Outdoor Condenser is standard option, however dehumidifier could be provided with remote AC option as well (remotely installed Outdoor Condenser or Fluid Cooler). Seresco NE Series – Compact Outdoor OMM September 2020... - Page 7 Attention! Equipment Clearances and Dimensions! CAUTION! For equipment proper operation, maintenance and service, respective clearances should be maintained. Generally, 30” clearances to the equipment must be kept for the maintenance and service purposes. For the specific required clearances information, as well as dehumidifier overall dimensions, distances to pipe connections, duct connections etc., refer to the submittal documentation. Dehumidifier External Systems Connection – SLX Cab Pic. C.1‐L shows provisions for external systems connections, including ductwork, electric power and control wires and various piping connections. CAUTION! Current manual shows general/default connections’ location. For details regarding specific dehumidifier’s connections (actual location, piping sizes and position dimensions, circuit type and flow direction etc.), refer to the dehumidifier’s submittal documentation as well as dehumidifier’s labels and stickers. Except for the condensate, all other piping systems are optional and may not be present in each dehumidifier. NOTE. Dehumidifier MUST be equipped with a P‐trap at the condensate connection for proper operation! If dehumidifier is requested/provided from the factory without P‐trap, one MUST be installed on site prior to dehumidifier being commissioned. Refer to the dehumidifier stickers and Installation Manual for details. Electrical Power to be brought to the dehumidifier disconnect. Pool Heating and Space Heating water connections, as well as control wiring, are normally brought through the pipe chase, located in the compressor compartment floor. Remote AC option (Outdoor Condenser or Fluid Cooler) piping connection: top (same as packaged AC option). Gas line. If the dehumidifier is equipped with a gas heater package for space heating purposes, the gas line connection is to be brought to the gas heater directly. WARNING! Gas Line. The gas line must be installed in accordance with respective device documentation (boiler, furnace, etc.) and local codes and regulations. September 2020 Seresco NE Series – Compact Outdoor OMM...
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Page 8: Dehumidifier View And Options - Slbx Cab
Dehumidifier View and Options – SLBX Cab Seresco standard NE008 to NE016 dehumidifier general views as well as some options are shown on Pic.C.1‐B. Pic. C.1‐B shows only one example of dehumidifier arrangement – refer to submittal documentation for specific details. Pic. C.1‐B Seresco NE Series – Compact Outdoor OMM September 2020... - Page 9 Optional Space Heating ‐ hot water coil, electric or gas heater ***. Optional Heat Recovery (HR) circuit. Air Conditioning (AC)* – external water cooling, outdoor condenser or fluid cooler. * All available options (tonnage, ductwork connections, AC options etc.) are shown. Refer to the submittal and other relevant documentation for your dehumidifier’s options. ** The pool water heating option relies on compressor‐created excess heat and is used as an additional heating source. It does not eliminate the need for a main pool water heater. *** For specific details on space heating (hot water, gas, electric) option, refer to the submittal and other documentation: Gas‐fired duct heater can be installed internally (fitted inside the dehumidifier at the factory) or provided for field installation (to be fitted in the supply air ductwork). Electric heater or hot water coil, depending on capacity, model, size, etc., can be installed externally (mounted on the top of SA opening or fitted in the supply air ductwork) or internally. Refer to your dehumidifier’s submittal documentation. Attention! Equipment Clearances and Dimensions! CAUTION! For equipment proper operation, maintenance and service, respective clearances should be maintained. Generally, 30” clearances to the equipment must be kept for the maintenance and service purposes. For the specific required clearances information, as well as dehumidifier overall dimensions, distances to pipe connections, duct connections etc., refer to the submittal documentation. September 2020 Seresco NE Series – Compact Outdoor OMM...
- Page 10 Air Conditioning (AC) Connection. Packaged AC option (outdoor dehumidifier with outdoor air condenser (OACC) incorporated with the dehumidifier) does not require piping connection to external AC system or device. Pic 1.C. shows packaged outdoor model with OACC mounted on the roof; alternatively, OACC could be mounted at the end of the dehumidifier. Remote (“split”) AC option (indoor or outdoor dehumidifier, connected to external cooled water/glycol system or remote fluid cooler or outdoor air condenser) – top (through the compressor stand roof) connection. Normally, the dehumidifier has only one AC option – air‐cooled (requiring connection to the outdoor air condenser) or water‐cooled (requiring connection to the fluid cooler or other external water‐cooled system such as geothermal, cooling tower, etc.). Therefore, only one of these options present with the actual dehumidifier. Pool Water Heating – bottom, side. Space heating (Hot Water connection) – bottom, side. Some connection location options for both, pool and space, heating pipe lines, are limited to indoor installation only – refer to submittal documentation Space Heating (Gas Heater connection, gas line). If the dehumidifier is equipped with a gas heater (boiler, gas furnace etc.) for space heating purposes, the gas line connection is to be brought to the gas heater directly. WARNING! Gas Line. The gas line must be installed in accordance with respective device documentation (boiler, furnace, etc.) and local codes and regulations. Electric Power and Control Connection. Electric power is normally brought to the dehumidifier disconnect (see Pic. C.1). If dehumidifier is not equipped with it, power lines to be brought directly to the main electric panel. Also, provisions are made to bring control and communication connections through the dehumidifier roof at the compressor compartment Seresco NE Series – Compact Outdoor OMM September 2020...
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Page 11: Dehumidifier Optional Arrangement - Slbx Cab
Single Deck dehumidifier has same dimensions, features and options as standard single‐compressor one, except for two compressor/refrigeration circuits instead of one. “Double‐Decker” dehumidifier is shown on Pic. C.3. It is composed of two identical dehumidifiers, one installed on top of another and controlled as a single Pic. C.3 dehumidifier (each deck is equipped with one compressor/refrigeration circuit). Single and Two‐Compressor Arrangement – Dehumidifier Model Dehumidifier typical arrangement, total capacity, and number of compressors are reflected in its model (for specific dehumidifier model refer to its Main Label – see Specific Data Info below), as illustrated in examples below: NE008 – single‐deck single‐compressor dehumidifier. Two ‐compressor NE series dehumidifier: NED08 ‐ single‐deck two‐compressor dehumidifier (single deck equipped with two compressors); NE216 ‐ double‐deck two‐compressor dehumidifier (composed of two identical dehumidifiers NE008). Most often, “Double‐Decker” comes as two horizontal dehumidifiers, one “stacked” on the top of another, however it could also be composed of two dehumidifiers (horizontal OR vertical) installed side by side or separately, still being controlled as one. September 2020 Seresco NE Series – Compact Outdoor OMM... -
Page 12: Air Conditioning Options - Outdoor Air Condensers And Fluid Coolers
NE004 – NE007 NG‐V‐0 5 ** Two‐compressor dehumidifier would normally have NE008 – NE012, NG‐V‐11 6 paired‐up two outdoor condensers of respective size (one per NE208 – NE212 compressor). NE014 – NE016, NG‐V‐12 7 For example, NE216 would have double‐condenser, NE214 ‐ NE224 composed of two NC‐Z‐1 (see Pic.C.4, Fig.1). NE228 – NE232 NG‐V‐22 8 *** The pump package is optional ‐ the fluid cooler may be provided without it. Pic. C.4‐A Attention! Equipment Clearances! Proper clearances should be maintained for adequate airflow and heat rejection! Generally, up to 36” side and 96” top clearances are required. For more information on clearances as well as equipment dimensions and other details, refer to the submittal documentation. Seresco NE Series – Compact Outdoor OMM September 2020... - Page 13 Pic. C.4‐B September 2020 Seresco NE Series – Compact Outdoor OMM...
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Page 14: Equipment Specific Data
Operational data, including: Refrigeration (refrigerant type, charge, etc.) Electrical/airflow (dehumidifier voltage, CFM, etc.) Other applicable data (pool heating, space/auxiliary heating features, etc.) Labels and Stickers: attached when applicable to the exterior and interior of the dehumidifier to show: External systems connections location/direction (pool/space heating, cooling circuits, condensate) Air filter locations, quantity, and size. Pic. C.5 Additional Info (warning, caution stickers, etc.) Wiring Diagrams: attached to the interior side of the Note: The main label shown above is just an example. dehumidifier, depict dehumidifier control and power wiring. Remotely installed condenser or cooler would have its specific information provided in similar manner (labels etc.). Attention! Glycol Circuits. Unless otherwise indicated, equipment fluid circuits (except for refrigeration and pool water circuits) such as heat recovery loop, compressor glycol loop, boiler package, fluid cooler etc., are normally filled/to be filled with water/glycol mixture; normally, rust inhibitor‐infused food‐grade propylene glycol is used. Glycol mixture concentration is normally shown on Main Label – refer as needed. Seresco NE Series – Compact Outdoor OMM September 2020... -
Page 15: Layout And Components
Dehumidifier Main Components 8 9 7 19 10 6 11 5 4 15 13 1 3 2 66 61 14 18 12 17 65 64 62 63 Pic. D.1‐A September 2020 Seresco NE Series – Compact Outdoor OMM... - Page 16 3 66 Pic. D.1‐B Main Blower (1) is in the main blower compartment next to the Main Electric Panel (2) and Compressor Compartment (3). Min Outdoor Air (OA) Opening (4) is equipped with a louver and, as an option, with a motorized damper and filter(s). The Manual OA Damper (5) is usually used to set proper amount of outdoor air intake. Purge Outdoor Air (POA) Openings (50) are equipped with a louver and a motorized damper for economizer/purge operation whether exhaust or purge is mounted integral or remote. Exhaust Fan Assembly (6) (fan and motorized damper) is located on the dehumidifier’s return air side opposite to the OA intake; Exhaust Air (EA) opening is equipped with a louver also. Purge Exhaust Fan Assembly (51) can also be found here and this opening is also equipped with a louver. If necessary, EA and OA louvers can be removed for shipping, service or maintenance; removing EA louver also allows the Exhaust Fan assembly to be slid out from the dehumidifier. Heat Recovery Package (52) includes glycol coils on min OA and min EA airflows. If option is included, service access is through the RA compartment and includes glycol pump, piping and all necessary accessories. Refrigeration coils ‐ Evaporator (7) and Reheat (internal condenser) (8) ‐ are located directly downstream of the Main Filter Rack (9). Evaporator Bypass Damper (10), is located next to the evaporator coil. It helps to control compressor suction pressure by adjusting the amount of air, bypassing the evaporator. Space Heater (11) – hot water coil or electric heater (depending on the dehumidifier’s option) –It’s located directly downstream of the Reheat coil. Optional Gas Heater Package (12), is normally installed under the dehumidifier. It includes gas heater (61), gas heater electric and control panel (62) and provisions for combustion air intake (63) and flue exhaust (64). Seresco NE Series – Compact Outdoor OMM September 2020...
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Page 17: Control System
Compressor operation is monitored with pressure sensors (Pic. D.3): d Pressure Transducers (as main operational control and safety) and Pressure Switches (fast‐reacting backup safety). c Sensors and safeties approximate location is shown on Pic. D.4. Pic.D.3 RA Combo Sensor (21) measures temperature and humidity of the pool room air (Return Air) entering the dehumidifier. It is located at the main filter rack. OA Temperature Sensor (22) measures outdoor air temperature; it’s located at the OA filter rack. As an option, the combo sensor (instead of regular thermistor) can be installed at the OA intake to measure both the temperature and humidity of the outdoor air. ET (EvapT) Temperature Sensor (23) measures the temperature of air leaving evaporator coil. It’s located directly downstream of the evaporator. SA Temperature Sensor (24) measures temperature of air leaving dehumidifier (supplied to the premise); it’s located in the main blower compartment at the supply air duct connection. If the dehumidifier is equipped with the pool heating option, Pool Water Temperature Sensors (Pool In (25) and Pool Out (26)) measure entering and leaving pool water temperature, respectively. The sensors are located directly at the respective connections of the coaxial pool water heat exchanger. If Full Flow Pool Heating option is present, respective pool water sensors are located at full flow pool water heater inlet and outlet, respectively (with optional water flow sensor). The compressor’s discharge line (high pressure side) is equipped with Temperature and Pressure sensors set ‐ Discharge Temperature Sensor, High Pressure Transducer and High Pressure Switch (27) ‐ to protect the September 2020 Seresco NE Series – Compact Outdoor OMM... - Page 18 compressor and control its operation. A similar function is performed by Suction Temperature, Low Pressure Transducer and Switch (28) located at compressor’s suction line (low pressure side). Main Electric Panel, apart from devices listed above (control board, OP, etc.) also contains Voltage Monitor; some optional control sensors and devices such as an air pressure differential sensor, current sensor(s). It may also be located in main electrical panel or in the dehumidifier in general. 23 21 22 24 26 25 27 28 Pic. D.4 Seresco NE Series – Compact Outdoor OMM September 2020...
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Page 19: Outdoor Air Condensers And Fluid Coolers Layout And Components
Outdoor Air Condensers and Fluid Coolers Layout and Components . The general layout of remote AC options (air‐and water‐cooled) is shown on Pic.D.5 below with the outdoor air condenser NC‐B‐1 (left) and fluid cooler NG‐V‐0 (right) as an example. While layout and main components are similar for all applicable AC options, there are some deviations (number of fans, coil sizes, composition, etc.). Refer to AC Options Basic View (Basic Information chapter) for additional information. 31 NG‐V‐0 NC‐B‐1 32 36 35 37 34 Pic. D.5 33 Cooling (AC) coil (31) (where heat from refrigerant in the outdoor condenser or glycol mixture in fluid cooler is rejected to the ambient air) is mounted onto metal frame/air box upstream (before) the fan (32), that pulls the air through the coil to absorb the heat. Condenser/cooler piping connections (33) are identified respectively (IN – OUT, Hot gas – Liquid etc.). Piping connection location may vary – refer to cooler/condenser labels, stickers, submittal and other documentation. Depending on the type, size and installation, outdoor condensers may be provided with different set of legs/supports (34), which are required assembly on‐site – refer to the Installation manual. Depending on the size and capacity, condenser or cooler may have multiple fans or coils. Electric power is normally to be brought to disconnect (35) (if cooler/condenser is equipped with such), which feeds it to the electrical box (36), that contains condenser or cooler power and control apparatuses. Depending on type of fluid cooler, location of electrical box may slightly differ. September 2020 Seresco NE Series – Compact Outdoor OMM... - Page 20 Fluid Coolers Pump Package. Fluid Coolers, if equipped with such option, would have a pump package box. Pic.D.6 below shows general layout of pump packages, used for NG‐V model fluid coolers. Note, that the package could be mounted onto the fluid cooler directly (standard) or provided separately. Pump (38) establishes glycol mixture circulation through the fluid cooler and dehumidifier; 38 Expansion tank (39) compensates for temperature‐ based glycol volume fluctuation; The pump package electrical sub‐panel (40) contains the pump package electrical power and control apparatuses. The pump package manifolds are usually equipped with pressure gauges, automatic air venting valve, draining and other valves. 40 39 Pic. D.6 Seresco NE Series – Compact Outdoor OMM September 2020...
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Page 21: Sequence Of Operation
If the dehumidifier is equipped with the pool water heating option, the pool water temperature is compared to its set point and pool heating is provided if required. Set Points The control system is constantly adjusting unit operation to achieve and maintain said parameters within couple degrees/percent of the set point. Refer to the dehumidifier’s main label for the design value of control parameters, as well as the following note. Note: To ensure the dehumidifier’s most economical operation, we recommend maintaining the following relationship between pool water and room air temperatures: Room Air T = Pool Water T + 2˚F Ventilation. The main blower runs continuously, establishing required supply airflow. The main blower speed is pre‐set via adjustable variable signal. Minimum Exhaust Fan (EF), if dehumidifier is equipped with such option, directs portion of return air outdoors. Like main blower, exhaust fan(s) speed is also controlled via adjustable (pre‐set) variable signal, that varies based on scheduled ventilation mode (Occupied, Non‐Occupied and Spectator) or call for Economiser Mode (as part of Air Conditioning and/or Dehumidification operation). Minimum Outdoor Air (OA) damper, if dehumidifier is equipped with such option, opens to introduce fresh outdoor air into the premise. OA damper could be equipped with ON/OFF (simple fully open – fully closed) or modulating‐controlled actuator; latter one would be controlled same way as minimum exhaust fan. Purge (Additional Exhaust) Option. Along with Min Exhaust Fan and Min Outdoor Air damper, dehumidifier could have additional set of exhaust (purge) fan(s) (PF) and purge outdoor air damper (POA), commonly referred as Purge. Purge fan(s) and OA damper(s) function is to allow for higher exhaust and fresh air amount, up to complete (100%) air changeover (when all exhaust fans and OA dampers are at their max capacities). Purge Fan(s) and Purge Outdoor Air damper(s) are controlled in the same fashion as min exhaust fans and min outdoor air. Some dehumidifiers may be equipped with additional Return Air damper: it closes in event of complete air changeover, separating return air side of dehumidifier from supply side (refer to Layout and Components chapter, as needed, for respective devices’ location). Complete air changeover, triggered manually, is known as Purge Mode. Note. Externally installed Exhaust Fan(s) and Outdoor Air damper(s) could be also controlled by the dehumidifier control system. This applies to both, Minimum and Purge/Additional, fans and dampers. September 2020 Seresco NE Series – Compact Outdoor OMM... -
Page 22: Heat Recovery Option
Heat Recovery Option. Dehumidifiers, packaged with Minimum Exhaust Fan and Minimum Outdoor Air damper, could also have additional Heat Recovery (HR) closed‐loop glycol system. Heat Recovery loop (see Pic. E.1 below) consists of two coils (air‐to‐glycol heat exchangers) and a pump, establishing glycol circulation between them. One coil, installed at exhaust air opening, recovers portion of exhausted air energy, another coil, installed at outdoor air intake, transfers this captured energy to entering outdoor air. Pic. E.1 Space Heating When premise air temperature drops below the set point, the dehumidifier control system issues a call for Space Heating Mode and engages space heater (electric or gas heater, hot water coil with valve etc.) by sending space heating signal, respective to space heater control type ‐ on/off, variable (0‐10VDC), etc. Air Conditioning, Dehumidification and Pool Heating. When premise air temperature goes over (exceeds) its set point, the dehumidifier control system issues a call for Air Conditioning Mode. Respectively, when premise air humidity goes over (exceeds) its set point, the dehumidifier control system issues a call for Dehumidification Mode. In some instances, these calls may co‐exist. To execute Dehumidification or Air Conditioning (Cooling) mode, control system, depending on current conditions, would resort to available means of cooling or dehumidification. Economiser Mode Option. Note: Economiser Mode requires dehumidifier to be equipped with full (min and additional) exhaust and outdoor air options! If outdoor air is dry and/or cool, it could be used to dehumidify and/or cool the premise. In this case, on call for Dehumidification or Air Conditioning mode(s), control system would simply increase exhaust fan(s) speed signal to direct more stale return air outside and bring in more outdoor (dry/cool) air in, thus reducing supply air humidity and/or temperature (as needed). Seresco NE Series – Compact Outdoor OMM September 2020... -
Page 23: Compressor(S)
Dehumidifier with pool heating option: pool valve diverts portion of hot gas into pool water heat exchanger, based on pool water heating demand. Outdoor condenser fan is engaged only if hot gas is diverted outdoors and compressor pressure is higher than pre‐set level (see Outdoor Condenser and Fluid Cooler Operation below). ‐ Once demand for the compressor’s operation is removed (respective call is satisfied), the pump down solenoid valve closes; once the compressor suction pressure reaches the pre‐set pressure, the compressor stops. Pic. E.1 September 2020 Seresco NE Series – Compact Outdoor OMM... - Page 24 Outdoor Condenser and Fluid Cooler Operation. Based on the type of the outdoor condenser or fluid cooler fans’ type (two‐speed fans or EC‐type/modulating fans), respective signal(s) are sent by control system to engage said fan(s): for two‐speed fans ‐ on/off signals (switching speeds, based on compressor head pressure level), for EC‐type fans ‐ variable 0‐10VDC signal (proportional to the compressor head pressure level). Refer to the fans’ type and wiring diagram if/when needed. If the fluid cooler is equipped with the built‐in pump package (to establish cooling fluid flow between dehumidifier and the fluid cooler or to serve as additional/booster pump), the said pump is also engaged along with fluid cooler fans – pump would stay engaged while fans are engaged (regardless of the fans’ speed). Seresco NE Series – Compact Outdoor OMM September 2020...
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Page 25: Interface And Communication
Pic. F.1 Touch Display Menus: Home Opens/returns to the home page Logs Access to dehumidifier logs and log‐related features (Alarms, etc.) User Access to user settings (Setpoints) and commands (Stop/Restart Dehumidifier, etc.) Advanced Access to advanced settings and features Help Context sensitive help presenting information related to the viewed page Most common/basic maintenance tasks performed using Touch Display OP Adjust Setpoint – in User menu: press the User button, then press the Setpoints button; select desired parameter (room air temperature etc.) and enter the desired value. Press the Enter button to confirm the entered value. Stop/Restart Dehumidifier –– in User menu: press the User button, then press the System Restart button; To stop and restart dehumidifier, press the System Restart button To reboot Touch Display OP, press the Restart Display button Review Alarm records –– done via the Logs menu: press the Logs button, then press the Alarm Log button. Unlock device/dehumidifier, stopped and currently locked out on the alarm –– done via Logs menu: press the Logs button, then press the Current Alarms button; press the Clear button next to the respective alarm (the alarm that’s locked out the device or entire dehumidifier). For detailed information on TouchDisplay OP refer to DASV Touch Display Manual, provided with the dehumidifier (or contact factory to obtain a copy). September 2020 Seresco NE Series – Compact Outdoor OMM... -
Page 26: Alarms
Compressor superheat/suction temperature; glasses, cleanliness of air‐side coils and air ‐ DisTemp1 filters. Pool Water: Various compressor pool water heating‐related Unless the alarm occurred due to a known Water(X)1, alarms indicating inadequate (too low/too high) water flow interruption (backwash, etc.), Wtr(X)1 pool water flow and/or pool water temperature. check the pool water flow (pump, filters, valves) and pool water temperatures. HPRelief Alert, indicating that additional condensing No action required unless it’s capacity is engaged (pool water heat exchanger accompanied by other (compressor‐ etc.) to prevent compressor high pressure from related) alarm or faulty situation. rising too high. Note that proper and regular maintenance (example: keeping air filters and air‐side coils clean) should reduce the chances of abnormal operations, dehumidifier alarm‐related stoppages and downtime. CAUTION! We recommend you have a qualified professional investigate and remedy all reoccurring alarm‐related stoppages and lock‐outs. Continuous dehumidifier restarting (clearing alarms) without addressing actual issues may result in equipment malfunction, premature wear, and failure. For more details regarding alarms and alerts, refer to the Alarms Description information (available via Help feature in Touch Display OP); contact factory if needed. Seresco NE Series – Compact Outdoor OMM September 2020... -
Page 27: Remote Communication
‐ Configure, as needed, local server and dehumidifier network settings. BMS (Building Management System) Communication to BMS can also be supported, depending on the type of communication protocol said BMS utilizes. The equipment control software supports most common of them ‐ different control software variation might be required to support different BMS communication protocols. Contact factory if necessary. BACnet (Internet, IP). Communication is established via the Ethernet cable (same method as Web Monitor). BACnet and Web Monitor communication can be used simultaneously. LON or Modbus. Communication requires external wiring between dehumidifier main control board and BMS terminal. Wiring schematic is normally indicated on wiring diagram (provided with dehumidifier). If dehumidifier is equipped with LON communication option, it’s normally provided with pre‐wired LonWorks Gateway for communication purposes. For more information about Web Monitor or BMS communication set up (connection, configuration, access, point cutsheets, etc.) – contact factory. Pic. F.2 September 2020 Seresco NE Series – Compact Outdoor OMM... -
Page 28: Basic Maintenance
Basic Maintenance Although Seresco equipment is built for minimal service downtime, periodic preventative maintenance is required to ensure maximum reliability, safety, and operating efficiency. WARNING! To ensure equipment longevity and proper and efficient operation, the dehumidifier and its auxiliary systems and devices (outdoor condenser, fluid cooler, boiler package, etc.) must be maintained properly and regularly. It is recommended to create a facility‐specific Routine Maintenance Program. Failure to maintain the equipment properly and regularly could result in personal injury, equipment damage or malfunction and will void the equipment warranty. Maintenance and Safety Only qualified/properly trained personnel should attempt to perform respective maintenance tasks. When it is necessary to work with live electrical components, have a licensed electrician or other qualified professional perform the required task. Be properly trained and equipped. Some maintenance tasks may involve usage of power tools, chemicals, etc. Refer to such tools and materials data (manuals, MSDS, etc.). Personnel performing such maintenance tasks should be: Properly trained to handle such tools and materials safely Equipped with proper personal protective equipment Turn the power off. Before performing any maintenance, disconnect all electrical power, including remote disconnect, and discharge all energy storing devices (VFDs, etc.) before servicing. Follow proper lockout procedures to ensure that power cannot be accidentally restored. Failure to follow provided safety warnings and labels could result in serious injury or death. Be aware of potential hazards. The equipment contains moving mechanical parts, components under high refrigerant pressures and surfaces with high temperatures. Before entering the dehumidifier and/or performing any equipment maintenance work, make sure that all moving parts are stopped, and it is safe to perform required task. Maintenance Key Points Here are some basic/key maintenance considerations, pertinent to all dehumidifiers and their auxiliary systems: Dehumidifier in mechanical room. No chemicals should be stored in the same mechanical room where the dehumidifier is installed. Chemical fumes/off‐gas can cause premature deterioration of the equipment. Store chemicals in a separate, well‐ventilated room. Access to the Equipment. Ensure that the equipment is accessible (minimum clearances are maintained): ... -
Page 29: Routine Maintenance Program
The suggested general maintenance operations and their frequency/intervals, listed in the table M‐1 below, can be used to create such a program. For more detailed maintenance recommendations related to specific components, refer to the respective component manufacturer’s manual. Table M.1. Recommended Maintenance Tasks and Intervals Interval Maintenance Task Weekly Observe the equipment for any changes in running conditions and unusual noise Clean or replace air filters if clogged or dirty Quarterly Verify that all set‐points are correctly programmed as specified by the facility operator Inspect and clean the drain pan(s) Tighten electrical connections, if required Check and tighten, if required, pool water hose clamps and sensor mounts Inspect all airside coils (outdoor condenser, fluid cooler, dehumidifier coils – evaporator, etc.) for Semi‐ dirt, cobweb build‐up, etc.; clean as needed Annually Check that the P‐trap is primed (filled with water). It is good practice to pour some water into the drain pan to ensure that the P‐trap is primed and operational Check the outdoor air louvres and dampers for accumulation of dust and clean as required Inspect the equipment’s cabinet for corrosion. If any damage is found, clean and repaint the affected surface with a rust‐resistant primer Clean the fan wheel(s) Check dampers operation (linkage/actuator is not loose, damper opens/closes properly etc.) Inspect electrical components, wiring and insulation Annually Rotate the fan wheel(s) and check for obstructions and rubbing Check gasket condition on all doors to ensure an airtight seal Check bolts on compressors, motor mounts, dehumidifier bases and coils and tighten if required Verify that the airflow around the remote condenser or dry cooler is unobstructed September 2020 Seresco NE Series – Compact Outdoor OMM... -
Page 30: Specific Components Maintenance
Safety Data Sheet (MSDS) for safety and handling information. Failure to follow all safety instructions could result in serious injury or death. Warning: Hazardous pressures! Coils containing refrigerant under pressure must not be cleaned using a solution over 150 ºF. Failure to follow these safety precautions could result in coil bursting, which could result in serious injury or death. To clean the coil Disconnect all electrical power to the equipment Use a soft brush to remove loose debris from the coil Mix a high‐quality coil cleaning detergent with water according to the manufacturer's instructions Clean coil according to suggested instructions Thoroughly rinse both sides of the coil and the drain pan with, clean water Straighten any coil fins that have been bent during the cleaning process Confirm the drain line is clear Replace all panels and parts and restore electrical power to the equipment Seresco NE Series – Compact Outdoor OMM September 2020... - Page 31 Special Maintenance Tasks. Fluid Cooler Winterization. Normally fluid coolers are used in the systems, filled with glycol mixture to prevent the system and the fluid cooler from freezing and, potentially, rupturing, when exposed to temperatures below freezing point. When fluid cooler is used with media that, when exposed to low temperatures, could freeze (water or lower‐ percentage glycol mixture), one way to protect the equipment is to drain it (also known as “winterization” of the equipment). Though fluid cooler itself is normally equipped with means to be drained properly/fully, it is recommended to have same means in place for entire system (fluid cooler – piping – dehumidifier etc.): Have each local high point of the system equipped with means to bleed the air (air bleeding valve etc.) Have each local low point of the system equipped with means to drain the fluid. CAUTION. Draining and re‐filling the fluid cooler must be performed by trained personnel, according to proper field practice and system layout. Improper draining or re‐filling the system could lead to equipment damage, malfunction, premature tear and ware and may void equipment warranty. CAUTION. Ensuring that the fluid cooler and associated system(s) equipped with proper means of draining, creating draining and re‐filling procedures as well as determining whether draining is warranted to protect the equipment is outside of manufacturer’s scope and is a responsibility of installing contractor and local maintenance team. September 2020 Seresco NE Series – Compact Outdoor OMM...
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Page 32: Chapter W - Warranty
Pools – Equipment Warranty General Policy All Seresco service and warranty work is managed exclusively by Dehumidified Air Services (DASV). All warranties apply to the original equipment owner and are not transferable. All warranty inquiries should be made to Dehumidified Air Services. Dehumidified Air Services: Phone: 1‐833‐327‐7665 Email: Warranty@DehumidifiedAirServices.com Seresco warrants as set forth and for the time periods shown below that it will provide through either a DASV Service Technician or an authorized service organization specified and approved by DASV, a new or rebuilt part to replace a factory installed part which has failed because of defect in workmanship or material. NOTE: VERY REQUEST RELATED TO WARRANTY OF ANY NATURE AS DESCRIBED BELOW MUST BE OFFICIALLY DASV . AUTHORIZED AND DOCUMENTED IN ADVANCE BY TO QUALIFY FOR WARRANTY COVERAGE Warranty Void Unless Registered All Warranties are void unless the start‐up of the equipment is approved by a DASV service technician. Upon completion of the start‐up, a “Warranty Registration Certificate” will be issued, along with the Start‐Up Report, which activates the Warranty Period of the equipment. The Warranty Period will commence either upon completion of start‐up registration of the equipment or 6 months from factory ship date, whichever comes first. Initial 90‐Day Comprehensive Warranty During the first 90 days from initial start‐up, all parts and repairs related to factory defects or replacement parts are covered by the Seresco manufacturer warranty. All parts and labor requirements will either be handled by DASV technicians directly or managed and approved in advance by DASV through DASV authorized technicians. Internet Connected, Conditional One Year Repair Warranty If and only if the equipment is connected to the internet from the date of the warranty activation, a Repair Warranty will be provided for an additional 9 months subsequent to the initial 90‐Day Comprehensive Warranty for a total of 12 months of parts and labor warranty coverage. The unit must be connected and communicating to Seresco WebSentry for the entire term from start‐up in order to qualify. If qualified, Seresco will provide or pay for the required part and direct labor only, related to the part replacement. Only the labor required to replace the defective part is under warranty for this 9‐month extension. Travel time, diagnostic time, per diems, truck charges, shipping charges etc. are not covered under this Conditional Repair Warranty. ... - Page 33 Replacement Part Warranty If a replacement part provided by Seresco under this warranty fails due to a material defect prior to the end of the Two‐Year Parts Warranty (or the end of the extended warranty period if applicable), whichever comes first, Seresco will provide a new or rebuilt part F.O.B. factory. Applicability This warranty is applicable only to products that are purchased and installed in the United States and Canada. This warranty is NOT applicable to: 1. Products that have become defective or damaged as a result of non‐DASV or unauthorized service work, poor maintenance, faulty electrical supply, act of God, or any other circumstances outside of the specified care, maintenance or operation of the equipment including: Components that have been relocated from their original placement during manufacturing. Any portion of the system not supplied by Seresco. Components on which the model and/or serial number plates have been removed or defaced. Components which have become defective or damaged as a result of unauthorized opening of the refrigeration circuit, improper wiring, electrical supply characteristics, poor maintenance, accidents, transportation, misuse, abuse, fire, flood, alteration and/or misapplication of the product. Products not installed, operated and maintained as per the Seresco Operating and Mantenance Manual. Products on which payment is in default. 2. Parts that wear out due to normal usage such as; air filters, fuses and sensors are not covered by this warranty. NOTE: Refrigerant lost during the Initial 90‐day Comprehensive or Internet Connected Conditional One‐Year Repair Warranty will be reimbursed in accordance to the current market price of refrigerant at the time of repair and upon discretion of Customer Support team. Seresco will not be responsible for refrigerant lost from the system due to improperly installed contractor piping to the remote outdoor air‐cooled condenser. Limitations 1. DASV is a Manufacturer Service organization, not a first‐response or urgent response local service company. As such, we highly recommend that equipment owners have a relationship with their own ...
- Page 34 Where a jurisdiction does not allow limitations or exclusions in a warranty, the foregoing limitations and exclusions shall not apply to the extent of the legislation, however, in such case the balance of the above warranty shall remain in full force and effect. This warranty gives specific legal rights. Other rights may vary according to local legislation. Force Majeure Seresco will not be liable for delay or failure to provide warranty service due to government restrictions or restraints, war, strikes, material shortages, acts of God or other causes beyond Seresco control. Optional Extended Warranties If purchased prior to shipment and documented with a registered extended warranty statement certificate, Seresco will provide replacement components within the specified period of the extended warranties. Extended warranties commence either upon completion of start‐up registration of the equipment or 6 months from factory ship date, whichever comes first, and cover parts replacement only for parts that fail as a result of manufacturing defect. The failed parts must be returned to the factory with transportation prepaid by the customer as a condition of these warranties. Optional extended warranties are for parts only and subject to all the terms of the Two‐Year Parts Warranty. 1. Optional Five‐Year Compressor Warranty Subject to the terms above, Seresco will provide a replacement compressor for up to 60 months from the date of the warranty activation. 2. Optional Five‐Year Dehumidifier Coil Warranty Subject to the terms above, Seresco will provide a replacement coil for up to 60 months from the date of the warranty activation. Extended coil warranties are for parts of the dehumidifier only and does not cover parts of dry cooler or OACC coils. 3. Optional Ten Year Dehumidifier Coil Warranty Subject to the terms above, Seresco will provide a replacement coil for up to 120 months from the date of the warranty activation. Extended coil warranties are for parts of the dehumidifier only and does not cover parts of dry cooler or OACC coils. 4. Optional Five‐Year Driveline Warranty Subject to the terms above, Seresco will provide driveline replacement parts for up to 60 months from the date of ...
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