Specifications

Control Valves - SMARTLINK
®
MRV
www.maxoncorp.com
combustion systems for industry
Maxon reserves the right to alter specifications and data without prior notice.
© 2014 Copyright Maxon Corporation. All rights reserved.
10-30.7-58
E - i - 3/14
50120624-001/
User Display Operation
The optional SMARTLINK
®
MRV User Display simplifies commissioning and viewing system status with a back-lit, 4-line by 20-
character, liquid crystal display (LCD). The User Display can be remotely mounted up to 1000 feet away from the Control Interface
for remote commissioning and control room monitoring. Multiple displays can be connected to the system for both local and
remote operation. All commissioning functions provided within the Control Interface can be performed with the User Display.
However, the User Display provides the following functions in addition to the Control Interface commissioning and status
capabilities:
• Alarm and fault condition text message display
• Time-stamped history of 6 shutdown events
• System and valve maintenance functions
• Storing and viewing of up to 5 system profiles
• Restoring system profile in replacement Control Interface
See Reference Table 15 for a summary of the Main Menu and Sub-Menu Command list. The five keys on the display are used as
follows:
1) Press [MENU] key to move down Main Menu or Sub-Menu command list.
2) Press [BACK] key to move up Main Menu or Sub-Menu list.
3) Press [ENTER] to move from Main Menu command item to Sub-Menu list.
4) Press [BACK] key to move from the top command item in a Sub-Menu list back to the Main Menu.
5) Press [ENTER], [BACK] or [ARROW] keys to accomplish specific Sub-Menu tasks as prompted by the display.
6) When on a Main Menu item, press [MENU] and [DOWN] keys simultaneously to reach last Main Menu item.
7) When on a Main Menu item, press [BACK] and [UP] keys simultaneously to reach first main menu item.
Wiring Checkout
Before applying power to the SMARTLINK
®
MRV Interface Panel, Control Interface, or Valve Actuators, perform the following
wiring checkout:
1) Verify that 120 VAC (or 230 VAC) power and burner management control signals are connected to the proper field wiring
terminals of the SMARTLINK
®
MRV Interface Panel.
2) If a factory-wired MAXON SMARTLINK
®
MRV Interface Panel was not purchased, verify that no 120 VAC (or 230 VAC) wiring
is connected directly to any Control Interface or Valve Actuator terminal. The MRV Control Interface (and Valve Actuators)
must be powered by a 24 volt DC source.
3) Verify the proper wire type and maximum wire length requirements are satisfied for all connections.
4) Verify network/power connection color codes are correct for the Valve Actuators.
5) Measure the resistance between earth ground at the enclosure of the Control Interface and each of the four signals wired to the
Valve Actuator: F24+ (Field 24VDC), F24- (Field 24VDC Common), DA (Data-A), and DB (Data-B). The resistance should
indicate an open circuit (i.e., a resistance value greater than 10 Ohms). If an open circuit is not measured, damage or incorrect
wiring of the control network cable exists and must be located.
6) Verify proper termination of shields for the 4-20 mA cables and the power/network cable between the SMARTLINK
®
MRV
Interface Panel, Control Interface and Valve Actuators.
7) If a MAXON SMARTLINK
®
MRV Interface Panel is not provided, verify that all customer-provided output relays connected to
RO1 through RO5 of the Control Interface have a 24 VDC coil rating and require less than 100 mA to turn on.
Refer to SMARTLINK
®
MRV Reference Tables 1 through 5 (pages 10-30.7-69 to -73) for all terminal definitions and wiring/
shielding requirements.