Install Instructions

installation &
operating instructions
Armstrong
Compass H
7
setting pump curve function
auto
(factory setting)
Operating within the
defined range
The auto function controls the pump performance automatically within a defined per-
formance range (see fig. 12 - within the grey envelope).
• Adapt to the size of the system.
• Adapt to system demand over time.
In auto mode the Compass H is set to a proportional-pressure curve control.
pc1
Lowest proportional
pressure curve
The operation point of the pump will follow the lowest proportional-pressure curve (see
fig. 12) depending on the load demand.
The head (pressure) is reduced during low demand and increased during high demand
until the maximum wattage is reached, then the pump will run on the speed III curve.
pc2
Highest proportional
pressure curve
The operation point of the pump will follow the highest proportional-pressure curve
(see fig. 12) depending on the load demand.
The head (pressure) is reduced during low demand and increased during high demand
until the maximum wattage is reached, then the pump will run on the speed III curve.
pc3
Lowest constant
pressure curve
The operation point of the pump will follow the lowest constant-pressure curve
(see fig. 12) depending on the load demand.
The head (pressure) is kept constant, regardless of the load demand until the maximum
wattage is reached, then the pump will run on the speed III curve.
pc4
Highest constant
pressure curve
The operation point of the pump will follow the highest constant-pressure curve
(see fig. 12) depending on the load demand.
The head (pressure) is kept constant, regardless of the load demand until the maximum
wattage is reached, then the pump will run on the speed III curve.
III Speed iii
Speed III is the highest constant speed performance curve of Compass H and it also
presents the max performance capability of the pump (see fig. 12). Speed III can also be
used to vent the pump (see section 8.2).
II Speed ii Speed II is the medium constant speed performance curve of Compass H (see fig. 12).
I Speed i Speed I is the lowest constant speed performance curve of Compass H (see fig. 12).
input
Analog input
Analog input controls the operation of Compass H from o up to 100% performance
(see fig. 7)