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Grundfos MAGNA, Relay Module Installation and operating instructions...
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LIMITED WARRANTY Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are warranted to the original user only to be free of defects in material and workmanship for a period of 24 months from date of manufacture. Grundfos' liability under this warranty shall be limited to repairing or replacing at Grundfos' option, without charge, F.O.B.
Original installation and operating instructions. CONTENTS Page Symbols used in this document Connection Mounting 4.1 Connecting the cables 4.2 Mounting the module External start/stop Signal relay 6.1 Fault indication 6.2 Ready indication 6.3 Operating indication 6.4 Functional diagram Priority of settings Fault finding chart 8.1 Checking the module Technical data...
2. General description The relay module is an expansion module for circulator pumps GRUNDFOS MAGNA 32-100. The relay module is used for the control and monitoring of the pump. The pump can be started/stopped via an external relay and give fault, ready or operating indication.
3. Connection The electrical connection and protection must be carried out in accordance with local regulations. The relay module is powered wirelessly from the pump. To ensure correct function, follow the instructions in section 4.2 Mounting the module. Connect the module as shown in fig. 1. •...
4.2 Mounting the module 1. Align the two hooks on the module. 2. Gently push the module into place so that the hooks engage with the control box. 3. Check that the module and the control box touch each other. 4.
6. Correctly mounted module. 5. External start/stop The relay module incorporates a digital input for an external contact. The pump can be started and stopped via this input. When started, the pump will operate with the setpoint set on the control panel or with the R100.
The last five faults can be called up with the R100. In case of a fault, the red indicator light on the control panel is on. Note See installation and operating instructions for GRUNDFOS MAGNA 32-100.
6.2 Ready indication The signal relay is active when the pump is in operation or ready for operation. See section 6.4 Functional diagram. 6.3 Operating indication The signal relay is active as long as the pump is operating. If the pump is stopped on the control panel, with the R100 or because of a fault, the signal relay is deactivated and consequently gives a signal to an external control system, e.g.
7. Priority of settings The external forced-control signals will influence the settings available on the pump control panel and with the R100. However, the pump can always be set to max. curve duty or to stop on the control panel or with the R100.
8. Fault finding chart Before starting any work on the module, make sure that the electricity supply to the pump and the module has been switched off and that it cannot be accidentally switched on. Fault Cause Remedy The pump does The wires are not Connect the wires not react to...
8.1 Checking the module Illustration Action 1. Remove the module cover. 2. Check the LEDs. When the pump is switched on and the module is correctly mounted, the left LED must be Flashing flashing and the Permanently on right LED must be permanently on.
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