Xylem ecocirc XL, Инструкция по эксплуатации

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5.2.2 Temperature dependent control modes
For details refer to the electronic drive manual on www.bellgos-
sett.com.
5.2.2.1 ∆p-T control
This function adjusts the nominal differential pressure set point accord-
ing to the temperature of the pumped media.
For details refer to the electronic drive manual on www.bellgos-
sett.com
5.2.2.2 T-Constant temperature control
This function adjusts the nominal differential pressure set point accord-
ing to the temperature of the pumped media.
For details refer to the electronic drive manual on www.bellgossett.
5.2.2.3 ∆T constant
This function alters the speed of the pump in order to maintain a con-
stant differential temperature of the pumped media.
For details, refer to the electronic drive manual on www.bellgos-
sett.com.
5.2.3 Night mode
The night mode cannot be used in cooling systems.
Pre-requisites:
• The pump is installed between boiler outlet and system supply.
• The night mode feature is initiated when the pump recognizes a wa-
ter temperature change that is brought about by the boiler or high-
level control system.
The night mode is active only with:
• Proportional pressure
• Constant pressure
• Fixed speed / Constant curve
This function decreases power consumption of the pump to the mini-
mum when heating system is not running. An algorithm detects the wa-
ter temperature change and automatically adjusts the speed of the
pump.
The pump returns to the original setpoint when the system restarts.
5.2.4 External start/stop
The pump can be started or stopped via an external dry contact or a
relay that is connected to terminals 11 and 12 on single phase pump
models. The pump unit is provided by default, with the terminals 11
and 12 jumpered. See Figure 6: Connection diagram for single phase
models on page 8.
Start/stop terminals for three phase models are 13 and 14. See Figure
7: Connection diagram for three phase models on page 8.
NOTICE:
• The pump provides 5 VDC through the start / stop terminals.
• No external voltage must be provided to start / stop terminals.
• The cables connected to terminals 11 and 12 on single phase or to
terminals 13 and 14 on three phase pumps shall not exceed 65 feet
in length
5.2.5 Analog Input
The pump integrates a 0-10 V analog input at terminals 7 and 8 for sin-
gle phase and 19 and 20 for three phase units. See Figure 6: Connec-
tion diagram for single phase models on page 8 and Figure 7: Connec-
tion diagram for three phase models on page 8.
When a voltage input is detected, the pump switches to fixed speed
control mode automatically and starts to run according to the following
diagram:
SPEED
RPM
MAX
SETPOINT
MIN
STOP
[V] 0.6 0.9V 1.5 Vset 10 1.2
Figure 10: Voltage input detected
0–0.6V Voltage control — un-
recognized
0.6–0.9V Control recognized —
fixed speed icon be-
gins blinking. Pump
off.
0.9–1.5V Pump operates at min-
imum speed
1.5–10V Pump accelerates at
controlled speed
SPEED
RPM
MAX
SETPOINT
MIN
STOP
[V] 0.6 0.9V 1.5 Vset 10 1.2
Figure 11: Voltage input detected
10–1.5V Pump decelerates at
controlled speed
1.5–1.2V Pump runs at mini-
mum speed
1.2–0.6V Control recognized —
fixed speed icon re-
mains blinking. Pump
off.
0.6–0V Voltage control — un-
recognized
5.2.6 Signal relay
Dry relay contacts are available at terminal 4 and 5 for single phase
pumps, and at terminals 22, 23 and 24, 25 for three phase pumps.
Relay ratings
1. Vmax < 250 VAC
2. Imax < 2 A
5.2.6.1 Signal relay for single phase pumps only
A dry contact relay is provided at terminals 4 and 5. See connection di-
agrams Figure 6: Connection diagram for single phase models on page
5 System Description
10 ecocirc ® XL INSTRUCTION MANUAL