Assessments - 3, GPA: 4
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Table 7: Water pressure drops (WPD) in feet of head Unit Size GPM Cooling Heating EWT F Ft. Head Pressure EWT F Ft. Head Pressure 009 1.5 77 5.1 55 5.8 2.3 9.3 10.6 2.7 12.4 14.0 012 2.5 77 10.2 55 8.5 3.1 14.6 16.6 3.7 19.6 22.0 015 2.3 77 6.2 55 7.4 3.5 12.3 14.1 4.2 16.8 18.8 018 2.9 77 2.4 55 3.1 4.5 4.9 5.9 5.4 6.6 7.7 024 3.9 77 5.0 55 6.2 6.0 9.9 11.8 7.2 13.2 14.5 036 5.9 77 4.9 55 5.5 9.0 9.8 11.0 10.8 13.3 14.7 Water Volume Table 8 is provided for use in calculating glycol requirements for the unit. Table 8: Water volume Unit Model GET Water Side Volume Cubic In. Water Side Volume Cubic Ft. Water Side Volume Gallons 009 17.0 0.010 0.074 012 17.0 0.010 0.074 015 36.0 0.021 0.156 018 48.0 0.028 0.208 024 55.0 0.032 0.238 036 71.0 0.041 0.307 Flow Checks For the operating temperature drop (heating) and rise (cooling), refer to Table OP1 and OP2 for the proper water temperature change. Depending on the unit size, entering water temperature and water flow rate, the cooling temperature rise is from 8°F-16°F. Based on the same criteria for heating, the temperature drop is from 2°F-13°F. Pressure Using the P/T ports and one 0-60 psi pressure gauge with the P/T port adapter, measure the pressure difference between the water-in and water-out connections. Compare the pressure differential to Table 6 to determine flow. Start-up Checklist and Log Use the form on page 24 to log system and unit temperatures during start-up. ! WARNING Live Electrical Components! During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. WSHP-SVN08B-EN Start-up Checklist and Log Installing Contractor: Use this form to thoroughly check-out the system and units before and during startup. (This form need not be returned to the factory unless requested during technical service support). Job Name: Model Number: Date: Serial Number: In order to minimize troubleshooting and costly system failures, complete the following checks and data entries before the system is put into full operation. MODE HEAT COOL Entering fluid temperature Leaving fluid temperature Temperature differential Return-air temperature DB/WB Supply-air temperature DB/WB Temperature differential Water coil heat exchanger (Water Pressure IN) Water coil heat exchanger (Water Pressure OUT) Pressure Differential F F F PSIG PSIG PSIG F F F COMPRESSOR Amps Volts Discharge line temperature F F F PSIG PSIG PSIG F F F (after 10 minutes) F F WSHP-SVN08B-EN Maintenance Preventive Maintenance Maintenance on the unit is simplified with the following preventive suggestions: Filter maintenance must be performed to assure proper operation of the equipment. Filters should be inspected at least every three months, and replaced when it is evident they are dirty. Filter sizing includes: Model GET Filter Size (nominal) 009, 012 14 x 20 (356 x 508) 015 18 x 20 (457 x 508) 018 18 x 25 (457 x 635) 024, 036 20 x 30 (508 x 762) ! WARNING Hazardous Voltage! Disconnect all electric power, including remote disconnects and discharge motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. Check the contactors and relays within the control panel at least once a year. It is good practice to check the tightness of the various wiring connections within the control panel. A strainer (60 mesh or greater) must be used on an open loop system to keep debris from entering the unit heat exchanger and to ensure a clean system. For units on well water, it is important to check the cleanliness of the waterto- refrigerant heat exchanger. Should it become contaminated with dirt and scaling as a result of bad water, the heat exchanger will have to be back flushed and cleaned with a chemical that will remove the scale. This service should be performed by an experienced service person. ! WARNING Hazardous Chemicals! Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For personal safety, refer to the cleaning agent manufacturers Materials Safety Data Sheet and follow all recommended safe handling practices. Failure to follow all safety instructions could result in death or serious injury. It should be noted that the water quality should be checked periodically. See Table 9. Table 9: Water Quality Table Scaling Calcium and magne-Less than 350 sium (total hardness) ppm Corrosion pH 7-9.5 Hydrogen Sulfide Less than 1 ppm Sulfates Less than 25 ppm Chl...