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TOOLS Required
•
Phillips Head Screwdriver
•
Drill and Drill Bit Set
•
Adjustable Wrench
•
Set of Nut Drivers SAE
•
Torx set SAE
•
Multimeter
•
Gas Analyzer
Wire runs and devices connected to the Air Damper Interlock, Auxiliary Input, or Start Interlocks MUST be
NOTE: Analog input for the NURO controller must be 4-20mA.
NOTE: DHW Flow switch terminals are not available.
NOTE: If Cascading multiple appliances, convert all to NURO controls for ideal
operation.
NOTE: If using a Protocol Converter or MODBUS, contact the factory for support.
1. Lock out Tag out all electrical connections and gas supply to appliance. There may be
multiple power sources.
2. Open front door of appliance and remove side panels.
3. Remove terminal block covers. Identify and label all current field wiring on boiler when
disconnecting.
4. Remove 7/16" nuts as required that hold top panel on as shown in Figure 1. Top panel
will need to be lifted at least 2" in front in order to remove front panel.
Instructions
NURO Conversion Instructions
MACH C1500-C2000H
rated for 120 VAC.
1005101738
ENVI to NURO
Date: 12/19/2017
Revision A
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