1 Service (continued)

E: BMS

BMS (Active / Inactive)

The set point or modulation of the boiler may be controlled through the 0 - 10V BMS input or through ModBus. When parameter E1 set to INACTIVE, the 0 - 10V input will be ignored. When set to ACTIVE, the set point or modulation will be controlled by the voltage on the 0 - 10V input (in the case of 0 - 10V BMS control), or the 0 - 10V input value received through ModBus.

BMS Mode (Power / Set Point)

When programmed for BMS control through the 0 - 10V BMS input or through ModBus, the 0 - 10V signal can be interpreted as either a modulation command or a set point. When parameter E2 is set to POWER, the 0 - 10V signal will control the modulation. When set to SETPOINT, the 0 - 10V signal will control the SH set point.

BMS Volts at Minimum (Rate or Set Point)

When programmed for BMS control through the 0 - 10V BMS input or through ModBus, parameters E3 or E7 should be set to the minimum voltage signal sent to the SMART TOUCH control.

BMS Volts at Maximum (Rate or Set Point)

When programmed for BMS control through the 0 - 10V BMS input or through ModBus, parameter E4 or E8 should be set to the maximum voltage signal sent to the SMART TOUCH control.

BMS Rate at Minimum Volts

When programmed for BMS control through the 0 - 10V BMS input or through ModBus and the BMS Type is programmed as POWER, the modulation percentage represented by the Volts at Minimum parameter (E3) is set by parameter E5.

BMS Rate at Maximum Volts

When programmed for BMS control through the 0 - 10V BMS input or through ModBus and the BMS Type is programmed as POWER, the modulation percentage represented by the Volts at Maximum parameter (E4) is set by parameter E6.

BMS Set Point at Minimum Volts

When programmed for BMS control through the 0 - 10V BMS input or through ModBus and the BMS Type is programmed as SETPOINT, the set point represented by the Volts at Minimum parameter (E7) is set by parameter E9.

Service Manual

BMS Set Point at Maximum Volts

When programmed for BMS control through the 0 - 10V BMS input or through ModBus and the BMS Type is programmed as SETPOINT, the set point represented by the Volts at Maximum parameter (E8) is set by parameter E10.

BMS Volts to Enable

When programmed for BMS control through the 0 - 10V BMS input or through ModBus and the BMS Enable Mode is set to INACTIVE, parameter E11 determines the 0 - 10V BMS input voltage at which the boiler is enabled.

Differential to Stop BMS Demand

When programmed for BMS control through the 0 - 10V BMS input or through ModBus and the BMS Enable Mode is set to INACTIVE, parameter E12 determines how far below the On Volts setting E11 the 0 - 10V BMS input voltage must be in order to disable the boiler.

BMS Enable Mode

When controlling the boiler through the 0 - 10V BMS input or through ModBus, the boiler can be enabled one of two ways. With parameter E13 set to ACTIVE, the boiler will be enabled by closing the Enable input. When parameter E13 is set to INACTIVE, the boiler will be enabled by the voltage level on the 0 - 10V input (in the case of 0 - 10V BMS control), or the 0 - 10V input value received through ModBus.

F: Advanced Setup

Temperature units (°C / °F)

The control can be configured to display temperature in either °C or °F. This parameter can be changed by the user or the installer by accessing parameter F1.

Display Timeout (LCD Backlight Time)

This is the time in which the display remains illuminated. This parameter can be changed by the user or the installer by accessing parameter F2.

Freeze Protection Pump On

The SMART TOUCH control will turn on the boiler and system pump outputs whenever the inlet temperature drops below this setting. This is done to prevent the water in the heat exchanger from freezing. Certain low-temperature applications (such as snow melt) can operate at temperatures around freezing, so this setting needs to be lowered in these cases. The installer can adjust the temperature at which the pump outputs are turned on by accessing parameter F3.

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Lochinvar 3.5, 1.5, 2.5 service manual Advanced Setup

3, 2, 3.5, 2.5, 1.5 specifications

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