Related Manuals for Stulz SCS-024
Summary of Contents for Stulz SCS-024
- Page 1 Mini-Space EC DX and CW 4 – 12 kW Systems Vertical Floor Mounted, 60 Hz Data Installation, Operation and Maintenance Manual...
- Page 2 This document contains confi dential and proprietary information of STULZ. Distributing or photocopying this document for external distri- bution is in direct violation of U.S. copyright laws and is strictly prohibited without the express written consent of STULZ. Unpublished — rights reserved under the copyright laws of the United States and of other countries.
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Page 3: Table Of Contents
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL 2.7.1.1 Self-Contained Systems ..........9 Table of Contents 2.7.1.2 Split Systems ..............9 2.7.2 Water/Glycol, Chilled Water and Hot Water Introduction ............. 1 Reheat Piping ..............12 General ................1 2.7.3 Pump Package ............12 Product Description .............1 2.7.4 Condensate Drain Line ..........12 Safety ................1... - Page 4 Recommended Discharge Line Sizes .....12 4.3.2 Leak Repair ..............28 Table 4. Estimated Refrigerant Charge Weight 4.3.3 Refrigerant Piping ............28 for STULZ SCS Condensers ......17 4.3.4 General Common Repairs/Component Re- Table 5. Weight of R410A Refrigerant placement ..............28 (lbs/100 ft of type L tubing) .......17 4.3.4.1 Compressor Failure ..........28...
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Page 5: Introduction
Safety Study the instructions in this manual; they must be followed 1.3.1 General to avoid diffi culties. Spare parts are available from STULZ to insure continuous operation. Using substitute parts or Note, caution and warning statements are used in this... - Page 6 EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL • When working on electrical equipment, remove to observe proper safety precautions. Great care all jewelry, watches, rings, etc. must be exercised to prevent contact of liquid refrigerant or refrigerant gas, discharged under •...
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Page 7: General Design
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL General Design The Mini-Space EC unit is housed in a steel frame cabinet rated for indoor use. The exterior of the cabinet has a powder coat fi nish to protect against corrosion. A hinged door on the front of the cabinet gives access to components. Operator controls are conveniently located on the cabinet door. -
Page 8: Coil
1.4.7 Controller Mini-Space EC units have a STULZ E² Series Microprocessor 1.5.4 Firestat Controller that provides these general features: Optionally mounted in the return air stream, a fi re detector senses high return air temperature and signals the controller •... -
Page 9: Installation
If there is shipping damage, it must be noted on the freight carrier’s delivery forms before signing for the unit. STULZ ships all systems FOB factory. Any freight claims must be done through the freight carrier. -
Page 10: Rigging
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL fresh air should be kept to a minimum (as it adds to the cooling, CAUTION heating, dehumidification and humidifying loads), while maintaining the requirement of the Indoor Air Quality (IAQ) When moving the unit, it must be kept level and standard. -
Page 11: Outdoor Equipment
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL Optional Equipment (Field Installed) NOTE Placement of the floor or ceiling registers is NOTE important. If they are too close to the unit, the supply Do not mount any optional equipment on unit access air will be recirculated back to the unit before it has doors. -
Page 12: Condensate Pump
Do not place the spot-type water detector on an length of wire to be used. As an option, a 75 foot or 150 foot electrically conductive surface. long cable may be provided by STULZ. Follow the steps below to mount the sensor. Cable type water detector Lay the cable water detector fl... -
Page 13: Piping Connections
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL feet in the horizontal lines to ensure proper oil return to the Piping Connections compressor. 2.7.1 Refrigerant Refer to the line size charts provided in Table 1 for 2.7.1.1 Self-Contained Systems recommended line sizing. No refrigerant connections are required for self-contained, *”Equivalent Ft.”... -
Page 14: Downfl Ow Confi Guration Typical Air Patterns
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL NON-DUCTED TOP RETURN WITH FRONT AND BOTTOM DISCHARGE RETURN RETURN AIR INLET AIR INLET SUPPLY AIR OUTLET SUPPLY AIR OUTLET TOP FREE RETURN/ TOP FREE RETURN/ BOTTOM DISCHARGE FRONT DISCHARGE DUCTED TOP RETURN WITH FRONT AND BOTTOM DISCHARGE RETURN RETURN AIR INLET... -
Page 15: Upfl Ow Confi Guration Typical Air Patterns
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL TOP DISCHARGE WITH 2 OR 3 WAY PLENUM BOX SUPPLY SUPPLY AIR OUTLET AIR OUTLET RETURN DUCT AIR INLET RETURN AIR INLET FRONT FREE RETURN REAR DUCTED RETURN TOP DUCTED DISCHARGE SUPPLY SUPPLY AIR OUTLET AIR OUTLET... -
Page 16: Water/Glycol, Chilled Water And Hot Water Reheat Piping
The diameter of the drain line should be the full size of the The recommended ethylene glycol solution ratio is 40% connection. glycol to 60% water. (STULZ recommends Dowtherm SR1 NOTE manufactured by Dow Chemical Co.) Use only ethylene glycol Pour some water into the condensate drain pan(s) with inhibitors for corrosion protection. -
Page 17: Utility Connections
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL power and control fi eld-wiring. It is important to identify the options that were purchased with the unit in order to confi rm which fi eld connections are required. INLET 7/8" OD OUTLET 1/2"... -
Page 18: Single-Phase Units 208/230V
A of the A/C unit. cable harness is typically provided for the interconnect wiring. Refer to the STULZ E Series Microprocessor Controller The unit is provided with a main power pilot hole and a... -
Page 19: Remote Water Detector
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL 2.8.3.3 Remote Water Detector System Charging Procedures Each remote water detector will require wiring two conductors 2.9.1 Water-Water/Glycol Cooled Systems to the control terminal board in the unit electric box. The No fi eld refrigerant charging is required for fl uid cooled units. wire insulation must be rated at 600V. -
Page 20: Interconnecting Field Wiring - Glycol Systems
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL MAIN POWER SUPPLY 208-460V/1PH-3PH/60Hz INTERCONNECTING FIELD WIRING (TO BE INSTALLED IN ACCORDANCE WITH NFPA 70, N.E.C.) MAIN POWER SUPPLY 208-460V/1PH-3PH/60Hz DRYCOOLER INTERCONNECTING FIELD WIRING (TO BE INSTALLED IN ACCORDANCE WITH NFPA 70, N.E.C.) 24VAC ELECTRIC MODELS CC()-041/121-W/G... -
Page 21: Estimating Refrigerant Charge
CCD-041-A-EC unit connected with a 1/2” x 30 refrigerant), resulting in system contamination. Keep foot liquid line and 5/8” x 30 foot discharge line to a STULZ the entire system sealed as much as possible and Model SCS-018 condenser. -
Page 22: Refrigerant Charging Procedure
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL NOTE 6. Replace the Schrader valve cores if you removed them during the evacuation steps. You may now introduce the Use high quality hoses, and ensure they are free of refrigerant charge through the schrader valves. defects and don’t leak. -
Page 23: 30 °F Ambient Applications
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL 2. Disconnect the refrigerant cylinder from the discharge 2.9.4.4 -30 °F Ambient Applications side of the compressor and connect it to the suction side. NOTE 3. Refer to “3.0 Start-Up/Commissioning” on page 22. For units designed for -30 °F operation, a receiver Start the A/C system and use the system controller to lower the room temperature setpoint 3-5 °F below actual... -
Page 24: Head Pressure Controls-Air Cooled Systems
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL 2.10.2 Head Pressure Controls-Air Cooled the system will be operating. A receiver is used to store the extra refrigerant when the condenser is not using it. Systems NOTE 2.10.2.1 -20°F Condenser Fan Speed Systems utilizing air cooled condensers must not Used for outdoor or indoor installations where ambient have a refrigerant line pressure drop over 14 psig... -
Page 25: Hot Gas Reheat (Optional)
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL 2.10.6 Hot Gas Reheat (Optional) 2.11 Refrigerant Characteristics The hot gas reheat option incorporates a hot gas reheat 2.11.1 Pressure/Temperature Settings solenoid valve and a hot gas reheat coil. Under normal Table 6 is provided to assist with the normal settings of the operation when no reheat is required, the hot gas reheat system for R410A refrigerant. -
Page 26: Start-Up/Commissioning
It should be perature may decrease and the reheat function may ac- completed during start-up and sent to STULZ. tivate. As conditions in the room change, you may have to This checklist should be used as a guideline for readjust the setpoint as you check the operation. -
Page 27: Maintenance
Air cleanliness varies from one space to the next. at the back of this manual to record periodic general Establish a frequency for checking fi lters based on maintenance inspections. For assistance, contact the STULZ the conditioned space. Product Support Group. Ensure adherence to all safety statements while performing any type of maintenance. -
Page 28: Condensate Pump
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL 4.1.6 Condensate Pump Troubleshooting The condensate pump should be inspected semi-annually and Turn off all power to the unit before conducting any cleaned. Ensure that the fl oat works freely. Wipe the fl oat with a troubleshooting procedures, unless the procedure specifi... -
Page 29: Troubleshooting Guide
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL Table 8. Troubleshooting Guide SYMPTOM PROBABLE CAUSE RECOMMENDATION Suction Pressure Too Low a. Loss of refrigerant (excessive bubbles in Locate leak and repair. Recharge system. sight glass). b. Expansion valve stuck or obstructed Remove and clean or replace valve. - Page 30 EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL SYMPTOM PROBABLE CAUSE RECOMMENDATION Condenser Pressure Too High a. Non-condensable gas or air in system. Recover system and recharge. Replace drier/strainer. Evacuate to 50 microns and recharge. b. Condenser air intake is blocked. Remove debris and clean condenser.
- Page 31 EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL SYMPTOM PROBABLE CAUSE RECOMMENDATION System Short of Capacity a. Low refrigerant (indicated by bubbles in Check for leaks Repair and recharge sight glass). system. b. Expansion valve stuck or obstructed Remove valve and clear obstruction or (short cycling or continuous running).
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Page 32: Field Service
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL Field Service burnout occurred, the oil will be black and acidic. A mechanical failure will have no burned odor and the motor will attempt to NOTE run. An abnormal or excessive noise may be present. Do not attempt to make repairs without the proper Analyzing the oil is the only way to determine the proper tools. -
Page 33: Standard Clean Out Procedure
EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL 4.3.4.2 Standard Clean out Procedure 7. Recharge the system through the access valve on the suction line fi lter-drier. NOTE 8. Turn on power at the main power disconnect switch and Cleaning operations must be performed by a start the system at the controller. -
Page 34: Filter Replacement
If it can be determined that a part may be defective, a warranty authorization for a replacement part will be processed by STULZ Technical Support. The replacement part will then be shipped via UPS ground. If the customer requests that warranty part(s) be sent by any other method than UPS ground, the customer is responsible for the shipping charges. -
Page 35: Obtaining Spare/Replacement Parts
Unit Model Number and Serial Number The customer is responsible for the shipping cost incurred for returning the defective part(s) back to STULZ. Return of defective part(s) must be within 30 days, at which time an evaluation of the part(s) is conducted and if the part is found to have a manufacturing defect a credit will be issued. - Page 36 __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ Signature:________________________________ *** If factory assistance is required for any reason, provide the model number, serial number, and STULZ item number found on the unit nameplate. This will speed the process and ensure accuracy of information. ***...
- Page 37 EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL Glossary STULZ STULZ Air Technology Systems, Inc. MAX CKT Maximum Circuit Breaker Building Management System MAX FUSE Maximum Fuse BTU/Hr British Thermal Units Per Hour Minimum Circuit Ampacity Cubic Feet Per Minute...
- Page 38 EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL Notes...
- Page 39 EC I PACE NSTALLATION PERATION AND AINTENANCE ANUAL Notes...
- Page 40 STULZ North American Headquarters STULZ AIR TECHNOLOGY SYSTEMS (STULZ USA) , INC. 1572 Tilco Drive | Frederick, MD 21704 Tel: 301.620.2033 | Fax: 301.662.5487 | info@stulz-ats.com STULZ Company Headquarters STULZ GmbH Holsteiner Chaussee 283 22457 Hamburg products@stulz.de STULZ Subsidiaries STULZ Australia Pty. Ltd.
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