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LAARS NeoTherm LC NTV1700 - Install and Operating Manual User Manual

Page 85

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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

Configure

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

Configure

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

Select System

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

Left- or Right-

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

Configure button

Select Statistics

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

System ID and

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

Select Statistics

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

Configure button

Select Statistics

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

Arrow keys

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/