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Related Manuals for Grundfos Geo-Flo MAGNA3
Summary of Contents for Grundfos Geo-Flo MAGNA3
- Page 1 MAGNA3 Insulated Pumps Installation Information Wiring Plumbing Start-Up Control Mode Settings Multi-Pump Setup Faults IM1542EW 04/15...
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Page 3: Table Of Contents
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Table of Contents Model Nomenclature ............. . . 4 General Installation Information . -
Page 4: Model Nomenclature
Pump Series Standard/Special M3S = Grundfos Magna3 single insulated pump C = Cast iron volute M3C = Grundfos Magna3 single insul. pump with check valve Voltage Available Models B = 208-230/1/60 040-080 = 40-80 single head, 2” ball isol. valves, 2” NPT connections 040-120 = 40-120 single head, 2”... -
Page 5: General Installation Information
The MAGNA3 pump is mounted on a wood base for shipment. Remove the four bolts that attach the pump to the wood base. Always install the pump with motor shaft horizontal and the control box with the Grundfos logo in vertical position as shown below. -
Page 6: Determining The Pump Control Mode
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Determining the Pump Control Mode The MAGNA3 has a number of control modes for a variety of applications. However, for geothermal installations there are only two control modes that are applicable, Constant Pressure and Constant Curve. Most of the other modes are for boiler applications, and are not recommended. -
Page 7: Electrical Wiring
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Wiring Remove the 5 screws on the front cover of the control box with a T20 Torx driver. The Start/Stop jumper and electrical connections are located beneath the cover. Before attaching power, remove the Start/Stop jumper located inside the pump control module (remove the entire green plug with the grey jumper). - Page 8 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Wiring cont. For ease of setting up the pump it is best to leave the start/stop jumper in place until after the pump starts is completed. Once the pump start up is completed, the start/stop jumper can be removed and the S/S and ground connections made. For multi-pump configurations the start/stop will be used on the secondary pump.
- Page 9 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Wiring cont. MAGNA3RELAY Board - The MAGNA3RELAY board is operated from a dry contact closure. The dry contact closure can either be from the heat pump control accessory relay or from a SPST 230VAC coil relay. Wiring diagrams are shown below for connecting to the accessory relay (Figure 8) or SPST 230VAC coil relay (Figure 7).
- Page 10 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Wiring cont. Use two-conductor 18AWG thermostat wire to connect the MAGNA3RELAY dry contacts to the S/S and ground terminals on the MAGNA3 pump (see figure 9). Not used with MAGNA3 Pump Figure 9: MAGNA3RELAY board dry contacts to MAGNA3 WARNING: MAKE SURE THAT POWER IS DISCONNECTED BEFORE WIRING PUMP ENABLE RELAY.
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Page 11: Plumbing
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Plumbing Unit Plumbing There are several water valve options available to regulate flow to the heat pumps. WWKVS – is designed for use with variable speed units, and dual capacity units with AXB controls. When using this kit you will need to use the AID tool to adjust minimum and maximum flow rates. - Page 12 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Plumbing cont. WWK2T – is designed for single speed units. This kit uses slow closing valve, and ball valve to regulate flow. Always ensure that there is adequate flow for the heat pump. Refer to units Specification Manual for minimum and maximum flow rates. See figure 13 for wiring schematic Heat Pump Control Board...
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Page 13: Start-Up
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Start-Up CAUTION: VERIFY THAT AIR HAS BEEN PURGED FROM THE PIPING SYSTEM, AND THAT THE SYSTEM HAS BEEN PRESSURIZED (IF APPLICABLE) BEFORE PROCEEDING. Make sure the grey start/stop jumper is installed as shown in figure 4. If not replace the start/stop jumper and apply power to the pump. - Page 14 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Start-Up Cont. Option 1: Constant Curve Mode Follow steps below to set up the pump for Constant Curve Mode. Select Settings Scroll down to Control mode and press OK. Scroll down to Constant curve and press OK. Press to go back to the Settings menu.
- Page 15 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Start-Up Cont. Option 2: Constant Pressure Mode Follow Steps below to set up the pump in Constant Pressure mode. Open all of the water valves at the heat pumps for full flow. Select Settings. Scroll down to Control mode and press OK. Scroll down to Const.
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Page 16: Multi-Pump Setup
The pumps in a multi- pump system communicate with each other via the wireless Grundfos GENIair connection. A multi-pump system is set up via a selected pump, i.e. - Page 17 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Multi-Pump Setup Go back to the Assist menu (after both pumps are set up as Alternating, Backup or Cascade), and follow the steps above (through Step 2 of 9). Then, continue with the screens below. IMPORTANT: The assist menu will not go past this step if the second pump has not been set up for multi-pump operation.
- Page 18 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Multi-Pump Setup IMPORTANT: Step 8 (not shown) will start the pumps. If the start/stop jumper is removed, Step 8 will be skipped. Verify the pump function by selecting Pump Identification from the Status menu. See examples below. Example screen for pump 1 Example screen for pump 2 Disconnect power to the primary pump and remove the grey start/stop jumper.
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Page 19: Antifreeze Selection And Use
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Antifreeze Selection and Use Some of the equipment includes freeze detection thermistors to protect the water-to-refrigerant heat exchanger from damage caused by freezing liquid. Be sure the “Loop/Well” DIP switch is in the “Loop” position if antifreeze is used and in the “Well” position if plain water is used in the loop. - Page 20 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Antifreeze Selection and Use cont. Figure 17: Freeze Protection Curves P/N: CAMT Methanol Hydrometer Methanol Mixture 0.900 Environol™ Mixture 1.00 Freeze Protection Temperature ( ˚F) * With reference to 60°F water courtesy of Carbide and Carbon Chemicals Corporation 1.000 Figure 18: Environol™...
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Page 21: Pressure Drop
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Pipe Pressure Drop POLYETHYLENE PRESSURE DROP PER 100 FT OF PIPE IN FEET OF HEAD ALL SIZES SDR 11 BRINE 25% ETHANOL @ 30°F Viscosity 0.004 lbm/ft sec Darcy-Weisbach Method Density 61.30 lb/ft3 FLOW 3/4” IPS SDR 11 1”... - Page 22 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Pipe Pressure Drop cont. PRESSURE DROP PRESSURE DROP PER 100 FT. OF PIPE IN FEET OF HEAD PER 100 FT OF HOSE IN FEET OF HEAD CSA 100 and 160 SERIES PE PIPE Darcy-Weisbach Method BRINE 20% METHANOL @ 30°F BRINE...
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Page 23: Faults
Warning. One yellow indicator light permanently on. Pump stopped. Two opposite red indicator lights flashing Alarm. simultaneously. Pump stopped. Full text faults are displayed on the screen. For more detailed information call technical service or refer to the Grundfos Installation. - Page 24 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Notes...
- Page 25 MAGNA3 INSULATED PUMPS INSTALLATION MANUAL Revision Guide Pages: Description: Date: First Published 01 April 2015...
- Page 26 Product: MAGNA3 Type: Insulated Pumps Document: Installation Manual *IM1542EW* IM1542EW 04/15...
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