Uniflair UST500, Инструкция по эксплуатации

Страница: 47 / 100

UST500 CONTROL BOARD
06MC0074@00B0100
14/04/2010
47
Antifreeze operation with pump
The antifreeze function runs when:
•
enabled via parameter (PI19 - Enable antifreeze function with internal circuit water pump = 1). See table 5.
•
always on in any machine operating state except local or remote OFF, unless alarms block the pump.
To ensure the efficient operation of the pump, the following must be configured correctly:
•
an analogue input, configured as NTC external temperature input
•
a digital or analogue output, configured as pump
Input Value Output Value
AI1 CF00=2, CF12=6
DO1
DO2
DO3
DO4
D05
CF45…CF48= 3
CF49= 3
AI2 CF01=2, CF13=6 DO6 CF50=3
AI3 CF02=2, CF14=6 TC1
CF42=3, or 16
AI4 CF03=2, CF15=6
AO1
AO2
AO3
CF43=3, or 16
(CF34=1)
CF44=3, or 16
(CF35=1)
CF30=3, or 16
Table 5 parameter PI19…P21
Parameter Description
Value
0 1
PI19
Enable antifreeze function with internal circuit
water pump Function disabled Function enabled
Diagram G
PI20
Internal circuit water pump regulator setpoint for
antifreeze
PI21
Internal circuit water pump regulator hysteresis
for antifreeze
•
The pump is activated when Ext. Temp. < PI20.
•
The pump switches off when Ext. Temp. > PI20+PI21.
•
Modulating pumps will run at maximum speed.
Diagram G - antifreeze function with pump
OFF
PUMP
Ext. Temp
PI21
ON
PI20