Page 1: ... Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and current editions of the National Electrical Code NEC NFPA 70 In Canada refer to current editions of the Canadian electrical code CSA 22 1 Recognize safety information This...
Page 2: ...ts nmst only be stored or moved in the normal upright position as indicated by the UP arrows on each carton at all times EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage If unit stacking is required for storage stack units as follows Do not stack units larger than 6 tons Vertical units less than 6 tons no more than two high Horizontals units less than 6 tons no...
Page 3: ...ating conditions are expected to occur Refer to the Flow Center installation manuals for more specific instructions 10 Fig 1 Earth Coupled Application EARTH COUPLED APPLICATION 1 LINE VOLTAGE DISCONNECT UNIT 2 FLEX DUCT CONNECTION 3 LOW VOLTAGE CONTROL CONNECTION 4 LINE VOLTAGE CONNECTION UNIT 5 PIT PORTS 6 VIBRATION PAD 7 CONDENSATE DRAIN 8 GROUND LOOP CONNECTION KIT 9 GROUND LOOP PUMPING PACKAGE...
Page 4: ... moderate scale formation or in brackish water a cupronickel heat exchanger is recommended Copper is adequate for ground water that is not high in mineral content In well water applications water pressure must always be maintained in the heat exchanger This can be accomplished with either a control valve or a bladder type expansion tank When well water is used exclusively for supplying water to th...
Page 5: ...osing solenoid valve must be used to prevent water hammer Solenoid valves should be connected across Y and C on the interface board for all Make sure that the VA draw of the valve does not exceed the contact rating of the thermostat Pressure temperature ports are recommended in both supply and return lines for system flow balancing Water flow can be accurately set by measuring the water to refrige...
Page 6: ...mell appears at 0 5 ppm level Hydrogen Sulfide H2S All Copper alloy bronze or brass cast components are OK to 0 5 ppm Ammonia ion as hydroxide chloride nitrate and sulfate All 0 5 ppm compounds Maximum Allowable at Maximum Water Temperature 50 F 75 F 100 F Copper 20 ppm NR NR Maximum Chloride Levels cupronickel 150 ppm NR NR 304 SS 400 ppm 250 ppm 150 ppm 316 SS 1000 ppm 550 ppm 375 ppm Titanium 1...
Page 7: ...must not come in direct contact with joists trusses walls etc Some applications require an attic floor installation of the horizontal unit In this case the unit should be set in a full size secondary drain pan on top of a vibration absorbing mesh The Secondary drain pan prevents possible condensate overflow or water leakage damage to the ceiling The secondary drain pan is usually placed on a plywo...
Page 8: ...ump larger on long runs UNIT OPERATION HAZARD Failure to follow this caution may result in improper equipment operation Never use flexible hoses of a smaller inside diameter than that of the fluid connections on the unit GB units are supplied with either a copper or optional cupronickel condenser Copper is adequate for ground water that is not high in mineral content NOTE Proper testing is recomme...
Page 9: ...side of the transformer a jumper between R and COM terminal of ALR contacts must be made IMPORTANT If the thermostat is provided with a malfunction light powered off of the hot R side of the transformer then the thermostat malfunction light connection should be connected directly to the ALR contact on the unit s UPM board SAFETY DEVICES AND UPM CONTROLLER U j il 2 Lpc 3 FREI 4 CON 5 BRN Q o I l ii...
Page 10: ...icator wit blink codes as follows One Blink High pressure lockout Two Blinks Low pressure lockout Three Blinks Freeze sensor lockout Four Blinks Condensate overflow Five Blinks Brownout TEST DIP SWITCH A test dip switch is provided to reduce all time delay settings to 10 seconds during troubleshooting or verification of unit operation Note that operation of the unit while in test mode can lead to ...
Page 11: ...wer supply without consulting the factory Doing so may void equipment warranties 5 Check with all code authorities on requirements involving condensate disposal over flow protection criteria SEQUENCE OF OPERATION Cooling Mode Energizing the 0 terminal energizes the unit reversing valve thus placing the unit into cooling mode The fan motor starts when the G terminal is energized When the thermostat...
Page 12: ...f START _1 RESET ON R YES YES YES NO NO YES NO YES NO NO LOCKOUT CAN BE SET TO 4 VIA DIP SWITCH NO YES YES O NO Fig 12 UPM Sequence of Operation SOO Flow Chart A14129 12 ...
Page 13: ... flushed with cold water until the water leaving the drain hose is clear and free of sediment 6 Close all valves and remove the drain hose HR Water Piping All hot water piping MUST be a minimum of 3 8 O D copper tube to a maximum distance of 15 feet For distances beyond 15 feet but not exceeding 60 feet use 1 2 copper tube Separately insulate all exposed surface of both connecting water lines with...
Page 14: ...de 5 Turn the thermostat system switch to the OFF position The unit should stop running and the reversing valve should de energize 6 Leave the unit off for approximately five 5 minutes to allow for system equalization 7 Turn the thermostat to the lowest setting 8 Set the thermostat switch to HEAT 9 Increase the thermostat setting approximately five 5 degrees above room temperature 10 Verify the he...
Page 15: ...t the low voltage terminal strip between R and C Y and C and O and C If the blower does not operate verify 24 volts between terminals G and C Replace the thermostat if defective unit offon Discharge pressure In t COOEING mode Lack of or inadequate water flow Entering watei high 2iesSuie t0o high temperature is too warml Scaled or plugged Condenser 9 P I In HEATING I mode Lack of or inadequate air ...
Page 16: ...mpressor Defectwe reversing valve creating bypass of refrigerant from dLscharge of suction side of compressor Replace reversing valve Compare umt operahon pressures to the pressure temperature chart for the umt Check T XV for possible restnchon or defect Replace ff necessary The refrigerant system may be contaminated wEth mo sture or noncondenstbles ReclaLm refrigerant replace filter dryen evacuat...
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