Install Instructions

Page 64
LAARS Heating Systems
Name PW? Function How to get there
Off hysteresis (DHW) - When producing Domestic Hot Water –
The control system will not shut off the boiler until
the temperature at the System sensor rises to the
DHW setpoint plus a hysteresis value (normally
about 10°F).
Info/ Advanced Setup/ DHW
Conguration
Off hysteresis (LL) - When using the Lead/ Lag system to control
multiple boilers –
The control system will not shut off the boilers until
the temperature at the System sensor rises to
the Lead Lag CH setpoint plus a hysteresis value
(normally about 10°F).
Info/ Advanced Setup/ Lead Lag
Conguration/ LL Master Cong.
On hysteresis (CH) - For hydronic heating (Central Heat) –
The control system will not re the boiler until the
temperature at the System sensor drops to the CH
setpoint minus a hysteresis value (normally about
10°F).
Info/ Advanced Setup/ CH
Conguration
On hysteresis (DHW) - When producing Domestic Hot Water –
The control system will not re the boiler until the
temperature at the System sensor drops to the
DHW setpoint minus a hysteresis value (normally
about 10°F).
Info/ Advanced Setup/ DHW
Conguration
On hysteresis (LL) - When using the Lead/ Lag system to control
multiple boilers –
The control system will not re the boilers until the
temperature at the System sensor drops to the Lead
Lag CH setpoint minus a hysteresis value (normally
about 10°F).
Info/ Advanced Setup/ Lead Lag
Conguration/ LL Master Cong.
Outdoor reset (CH) - Enable = Outdoor Reset feature turned on Quick Start
Info/ Advanced Setup/ CH
Conguration/ Outdoor Reset Cong.
Outdoor reset enable
(LL)
- When using the Lead/ Lag system to control
multiple boilers –
Enable = Outdoor Reset feature turned on
Info/ Advanced Setup/ Lead Lag
Conguration/ LL Outdoor Reset
P gain (CH) Y This gain is applied to the Proportional term of the
PID equation for the hydronic (Central Heat) loop.
Info/ Advanced Setup/ CH
Conguration
P gain (DHW) Y This gain is applied to the Proportional term of the
PID equation for the Domestic Hot Water loop.
Info/ Advanced Setup/ DHW
Conguration
P gain (LL) Y When using the Lead/ Lag system to control
multiple boilers –
This gain is applied to the Proportional term of the
PID equation for the hydronic loop.
Info/ Advanced Setup/ Lead Lag
Conguration/ LL Master Cong.
Priority time Y If this parameter is non-zero, then a Domestic Hot
Water demand takes priority over other demand
sources for the specied time. The priority override
timing is reset when demand from the DHW source
turns off.
Info/ Advanced Setup/ DHW
Conguration
Priority vs Central Heat Y If a CH call and a DHW call arrive at the same time,
which has priority?
Info/ Advanced Setup/ DHW
Conguration
Priority vs Lead Lag Y When using the Lead/ Lag system to control
multiple boilers –
If a call for hydronic heat and a DHW call arrive at
the same time, which has priority?
Info/ Advanced Setup/ DHW
Conguration