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Summary of Contents for Seresco NH Series
- Page 1 NH SERIES DEHUMIDIFIERS OPERATIONS AND MAINTENANCE MANUAL S e r e s c o D e h u m i d i f i e r s . c o m...
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Page 2: Table Of Contents
Dehumidification with Evaporator coil .................... 19 Purge Mode ..............................20 Heat Recovery ............................20 Space Heating ............................20 Compressor(s) If applicable........................21 Compressor Circuit Operation ........................ 21 Outdoor Fluid Cooler Operation ......................22 Interface and Communication ........................23 Seresco NH Series OMM April 2022... - Page 3 Basic Maintenance ............................26 Maintenance and Safety ........................... 26 Maintenance Key Points ........................... 26 Routine Maintenance Program ....................... 27 Specific Components Maintenance .......................28 Special Maintenance Tasks. Fluid Cooler Winterization..............28 Pools – Equipment Warranty........................30 April 2022 Seresco NH Series OMM...
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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 from the manufacturer (see Contact Us below). -
Page 5: Reference And Additional Information
Contact Us Seresco 1-833-DAS-POOL (327-7665) Schedule / Modify a Start-up: 5685 Cypihot Street Scheduling@DehumidifiedAirServices.com Saint Laurent, QC H4S 1R3 Inquire about Warranty: Canada Warranty@DehumidifiedAirServices.com SerescoDehumidifiers.com Order Parts: Parts@DehumidifiedAirServices.com All Other Product Support: sales@dehumidifiedairservices.com April 2022 Seresco NH Series OMM... -
Page 6: Basic Information
Basic Information Pic. C.1 Seresco NH Series OMM April 2022... -
Page 7: Dehumidifier View And Options
Dehumidifier View and Options Standard NH series dehumidifiers are semi-custom: while basic concept and layout is the same, options and specific systems and components layout and location may vary from one dehumidifier to another. One of the typical dehumidifier arrangement is shown on Pic.C.1. -
Page 8: Dehumidifier External Systems Connection
Electric Power and Control Connection. Typically the power lines are to be brought directly to the • main electric panel. However, if applicable the electric power could be brought to the dehumidifier disconnect, which is normally incorporated with main electric panel. Seresco NH Series OMM April 2022... -
Page 9: Dehumidifier Optional Arrangement
Dehumidifier Optional Arrangement Multi-Compressor Arrangement and Compressor Compartment Layout NH series dehumidifier, depending on required capacity, could have two or three compressors. Pic.C.2 shows options of dehumidifier supply air (SA) end and compressor compartment arrangement, based on number of compressors and overall tonnage of the unit. -
Page 10: Air Conditioning Options - Outdoor Air Fluid Coolers (Oafc)
Standard fluid coolers used with this model of dehumidifier is NG-V series, composed of number of “two-coils-two-fans” blocks, based on required capacity of the cooler: Fluid Cooler NG-V-22 (Fig.1) composed of two such blocks etc. The largest single fluid cooler, • NG-V-62 (Fig.3) composed of six such blocks. Seresco NH Series OMM April 2022... - Page 11 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. Pic. C.4 April 2022 Seresco NH Series OMM...
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Page 12: Equipment Specific Data
Glycol mixture concentration is normally shown on Main Label – refer as needed. Seresco NH Series OMM April 2022... -
Page 13: Layout And Components
Outdoor-installed dehumidifier would have a louver(s) installed at the OA Pic. D.1A opening. Indoor-installed dehumidifier would have a Filter Box(s) installed at the OA opening. April 2022 Seresco NH Series OMM... - Page 14 Space heater location, if the dehumidifier is equipped with one, depending on the heater type: Hot • water coil or Electric heater is usually located directly downstream of the reheat coil; Gas heater (not shown) is usually located downstream of the main blower(s). Seresco NH Series OMM April 2022...
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Page 15: Layout And Components (Continued)
(16a), that circulates water/glycol to reject compressor- generated heat. Motorized water/glycol Reheat (79) and AC (80) valves’ opening position determines how much fluid is diverted to respective coil(s) (reheat and fluid cooler or external heat sink). April 2022 Seresco NH Series OMM... -
Page 16: Control System
OA Air Velocity Sensor, Measures incoming OA CFM located in the OA opening. • ET (EvapT) Temperature Sensor measures the temperature of air leaving evaporator coil. It’s • located directly downstream of the evaporator coil(s) (one sensor per each compressor circuit). Seresco NH Series OMM April 2022... -
Page 17: Outdoor Air Fluid Coolers Layout And Components
While layout and main components are similar for all applicable AC options, there are some deviations (number of fans, composition, etc.). Refer to AC Options Basic View (Basic Information chapter) for additional information. April 2022 Seresco NH Series OMM... -
Page 18: Sequence Of Operation
EA1, and in higher EA CFMs through the motorized damper EA2. Like the main blowers, 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). Exhaust fan speed is adjusted to ensure a Seresco NH Series OMM April 2022... -
Page 19: Cooling
If the dehumidification requirements of the space cannot be satisfied by just the OA (OA conditions being unsuitable), the compressors start to operate enabling the evap coil (in conjunction with OA) to dehumidify space. April 2022 Seresco NH Series OMM... -
Page 20: Purge Mode
When natatorium air temperature drops below the set point, the dehumidifier control system issues a call for Space Heating Mode and engages space heater (electric heater, hot water coil with valve.) by sending space heating signal, respective to space heater variable control (0-10VDC), etc. Seresco NH Series OMM April 2022... -
Page 21: Compressor(S) If Applicable
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 glycol pump and compressor stop. April 2022 Seresco NH Series OMM... -
Page 22: Outdoor Fluid Cooler Operation
Based on the type of the outdoor fluid cooler fans’ type (EC-type/modulating fans), respective signal(s) are sent by control system to engage said fan(s): 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. Seresco NH Series OMM April 2022... -
Page 23: Interface And Communication
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). April 2022 Seresco NH Series OMM... -
Page 24: Alarms
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 NH Series OMM April 2022... -
Page 25: Remote Communication
If dehumidifier is equipped with LON communication option, it’s Pic. F.2 normally provided with pre-wired LonWorks Gateway for Touch communication purposes. Display For more information about Web Monitor or BMS communication set up (connection, configuration, access, point cutsheets, etc.) – contact factory. April 2022 Seresco NH Series OMM... -
Page 26: 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 (fluid cooler, etc.) must be maintained properly and regularly. -
Page 27: Routine Maintenance Program
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 April 2022 Seresco NH Series OMM... -
Page 28: Specific Components Maintenance
“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.): Seresco NH Series OMM April 2022... - Page 29 April 2022 Seresco NH Series OMM...
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Page 30: Pools - Equipment Warranty
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. - Page 31 Warranty. 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.
- Page 32 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.
- Page 33 Heat recovery loop pump • Compressor glycol/water pump • Dry cooler/outdoor condenser fan(s) • April 2022 Seresco NH Series OMM...
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