EDM SYSCROLL 140 360 AIR EVO

SYSCROLL AIR EVO

Three options of variable water ow:

Manual ow adjustment

Constant delta P

Constant delta T

CONSTANT SPEED PUMP – VARIABLE FREQUENCY DRIVE ADJUSTMENT

The unit is equipped with a hydraulic kit driven by a variable frequency drive, without providing continuous modulation

of the speed. The water ow is xed during commissioning. The goal of this alternative is to provide the appropriate ow

rate and hydraulic balance, without the need for a mechanical balancing valve, and by taking advantage of the energy

consumption optimization of the pump.

Water-ow is adjusted through VFD LCP display. When having the dual pump option, there shall be pump alternation for

every 12/24 Hours.

VARIABLE SPEED PUMP – CONSTANT DIFFERENTIAL PRESSURE (DP)

The unit is equipped with a hydraulic kit driven by a variable frequency drive. The modulation of the pump speed is made in

order to ensure that the Differential Pressure (DP) remains constant within the system. The minimum pump speed is factory

set at 60% of the nominal speed. The minimum pump frequency can be adjusted through inverter. The constant DP option

is intended to be used with 2-way water regulation valves in the customer hydraulic system. At minimum system partial

load, when most of the 2-way valves are closed, a minimum ow rate must be ensured through the chiller evaporator. DP

is measured by a differential pressure sensor supplied by SYSTEMAIR at the customer expenses, that the customer must

install on the water loop, in a freeze protected area.

VARIABLE SPEED PUMP – CONSTANT DIFFERENTIAL TEMPERATURE (DT)

The unit is equipped with a hydraulic kit driven by a variable frequency drive. The modulation of the pump speed is man-

aged to ensure that the DT stays constant. Entering and leaving temperatures at the customer water loop will be measured

directly by the Variable frequency drive controller, through the SYSTEMAIR supplied temperature transmitters (at customer

charge). A DT setpoint will be present on the unit controller. The option for constant DT is intended to be used with 3-way

valves on water systems, or 2-way valves on water system but constant ow at the by-pass. The minimum pump fre-

quency can be adjusted on the inverter.

Variable ow hydronic systems