LAARS NeoTherm LC NTV1700 - Install and Operating Manual User Manual
Page 85

NeoTherm LC Boilers and Water Heaters
Page 81
9.8
Installer Parameters
This is a list of all of the parameters which can be accessed using the Installer password.
Label
Description
How to Reach
4 mA water
temperature
If a 4 – 20 mA input is used to adjust the
setpoint, this entry sets the low limit of the
control range. (In the example shown here,
an input of 4 mA would result in a setpoint of
90°F.)
<’home’ screen> Lead Lag Master button
button screen> Advanced Settings button Heat screen> 20 mA water temperature If a 4 – 20 mA input is used to adjust the setpoint, this entry sets the high limit of the control range. (In the example shown here, an input of 20 mA would result in a setpoint of 120°F.) <’home’ screen> Lead Lag Master button button screen> Advanced Settings button Heat screen> Anti Short Cycle Time This can be set to prevent the system from cycling on and off quickly if the heat demand is near the setpoint and changes quickly. <’home’ screen> Select a controller Summary screen> Configure button Configuration Boiler pump control The Boiler pump (Pump A) can be turned on manually, or it can be set to operate automatically. If it is turned on, then it remains on until the control is changed back to Auto. In Auto mode it operates according to the demand and overrun time.” <’home’ screen> Select a controller Summary screen> Configuration button arrow buttons Control Settings button Boiler Pump Cycle Count Boiler pump cycle count. Can be written to a new value (e.g. if the pump or controller is replaced). <’home’ screen> Select a controller Configuration line Boiler Name This parameter allows the installer to give each controller a unique name. <’home’ screen> Select a controller Summary screen> Configuration button Access Burner Cycle Count This is incremented on each entry to Run. It can be written to a with a new value if the burner or controller is replaced. <’home’ screen> Select a controller Summary screen> Configure button Configuration line Burner Enable Switch This parameter enables or disables the burner control. When it is off, the burner will not fire. <’home’ screen> Select a controller Summary screen> Operation button Burner Run Time This measures the time spent in the Run state. It can be written to with a new value if the burner or controller is replaced. <’home’ screen> Select a controller Configuration line CH (Central Heat) D gain This gain is applied to the Differential term of the PID equation for the CH loop. <’home’ screen> Select a controller Summary screen> Configuration button CH (Central Heat) Enable This parameter determines whether the Central Heat loop is enabled or disabled. When it is disabled, heat demand caused by the input assigned to the CH loop is ignored. It may be disabled to turn it off temporarily, or because the application does not use this feature. ‘home’ screen/ Select controller/ Status Summary screen/ Configuration button/ Central Heat Configuration/ Arrow keys/ Central Heat screen CH (Central Heat) Frost Protection Enable The CH frost protection feature can be enabled to run a pump (or pumps) and possibly fire the burner whenever the CH input sensor is too cold. ‘home’ screen/ Select controller/ Status Summary screen/ Configuration button/ Anti-Condensation Configuration/