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14

FIGURE 7.6

NXM2G Interlock Schematic

NXM2G interlock schematic, showing the correct positioning of the NXM2G in the boiler control
circuit.

NOTICE

When Fireye products are combined with equipment manufactured by others and/or integrated into
systems designed or manufactured by others, the Fireye warranty, as stated it its General Terms and
Conditions of Sale, pertains only to the Fireye products and not to any other equipment or to the
combined system or its overall performance.

WARRANTIES

FIREYE guarantees for 

one year from the date of installation or 18 months from date of manufacture

of its products to replace, or, at its option, to repair any product or part thereof (except lamps, elec-
tronic tubes and photocells) which is found defective in material or workmanship or which otherwise
fails to conform to the description of the product on the face of its sales order. 

THE FOREGOING

IS IN LIEU OF ALL OTHER WARRANTIES AND FIREYE MAKES NO WARRANTY OF
MERCHANTABILITY OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED.

 Except as

specifically stated in these general terms and conditions of sale, remedies with respect to any product
or part number manufactured or sold by Fireye shall be limited exclusively to the right to replace-
ment or repair as above provided. In no event shall Fireye be liable for consequential or special dam-
ages of any nature that may arise in connection with such product or part.

FIREYE

NXM2G-1002

3 Manchester Road

JULY 27, 2015

Derry, New Hampshire 03038 USA
www.fireye.com

Summary of Contents for NXM2G-2

Page 1: ...de based on temperature and time which are both adaptive The NXM2G will also inhibit the burner from firing on stage 2 if the boiler load demand is low thus ensuring the best efficiency for the curren...

Page 2: ...is not compromised Moreover the boiler set point is always maintained Should the NXM2G unit fail or lose electrical supply the boiler control system wir ing remains as normal and the boiler will opera...

Page 3: ...d devices NXM2G SPECIFICATIONS The right to make changes in specification or design at any time without prior notice is hereby reserved NXM2G System Model NXM2G 2 Supply Voltage 230V AC 60Hz Rated Cur...

Page 4: ...r LTHW boilers fired with on off forced draft burners two stage high low burners modulating burners Atmospheric boilers fired with two stage burners modulating burners Wiring Diagrams FIGURE 3 Typical...

Page 5: ...5 FIGURE 4 Typical Wiring for single stage forced draft burner FIGURE 5 Typical Wiring for 2 stage High Low force draft boiler 7 0 A max 3 7 0 A max 3 4 5...

Page 6: ...n When choosing a place to locate the NXM2G ensure that 1 The position of the NXM2G does not obstruct the boiler access panels used for maintenance 2 The NXM2G LEDs can be viewed without restriction C...

Page 7: ...onnections between the boiler and the NXM2G Remove the plug connectors from the wiring compartment As in Figure 1 using the cable anchor provided use cable ties to secure cables in the wiring compartm...

Page 8: ...onnections this should be as close to the boiler as possible This may require the pipe work insulation to be removed Using appropriate banding clamp secure the sensors to the pipe Please note Do not o...

Page 9: ...will allow the burner boiler to start without interruption i e not in save mode when the NXM2G is powered for the first time see Figure 6 5 Operate the boiler thermostat boiler firing to stop the boil...

Page 10: ...10 NXM2G IN OPERATION FIGURE 6 NXM2G Operation Status LED s...

Page 11: ...ring during first firing follow flowchart in Figure 7 2 3 Boiler Burner fires during first firing only and will not re fire thereafter follow flowchart in Figure 7 3 4 Boiler Burner fires in normal wa...

Page 12: ...12 FIGURE 7 2 NXM2G Power supply correct red LED on however boiler will not fire during First Firing FIGURE 7 3 Boiler Burner fires during First firing only and will not re fire thereafter...

Page 13: ...Boiler Burner fires in normal way without NXM2G operating in Save mode after first firing FIGURE 7 5 NXM2G Operates Boiler Burner but Thermostat on and Boiler firing LED s remain on when the boiler i...

Page 14: ...any product or part thereof except lamps elec tronic tubes and photocells which is found defective in material or workmanship or which otherwise fails to conform to the description of the product on t...

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