Siemens CE1U2353en01a user manual 80 90 100 C

TV
max					TVw
akt		TVmin
min
0	10	20	30	40	50	60	70
TVw	Current flow temperature setpoint
TVmax	Flow temperature setpoint maximum
Tvmin	Flow temp setpoint min

TVmax

2358Z09

80 90 100 °C

mixing valve control

Line no.	Operating line
2130	Mixing valve boost
2132	Actuatortype
2133	Switching differential 2-pos
2134	Actuator running time
2135	Mixing valve Xp
2136	Mixing valve Tn

Mixing valve boost	For mixing, the actual value of the boiler flow temperature must be higher than the
	required setpoint of the mixing valve flow temperature since otherwise that temperature
	cannot be controlled. The controller generates the boiler temperature setpoint based on
	the increase set here and the current flow temperature setpoint.
Actuator:type	Selection of the type of actuator determines the way the control action impacts the type
	of mixing valve actuator used.
Switching differential 2-	For the 2-position actuator, the 2-position switching differential must also be adapted.
pos	This is not required when using 3-position actuators.
Actuator: running time	Setting the actuator running time for the mixing valve used.
Mixing valve Xp	The proportional band defines within which change of the control variable ∆x (∆T of the
	flow) the whole correcting span y (valve travel) is traversed.
	The smaller the proportional band, the greater the change of the manipulated variable
	∆y at a given change of the controlled variable ∆x.
Mixing valve Tn	The integral action time is the period of time the controller’s I-part would require to
	produce the same change of the manipulated variable as the P-part
	An adjustment of the integral action time changes the valve’s rate of response.
	The longer the integral action time Tn, the slower the response of the controlled
	system.
		y
			2392Z08
			1
			Xp
			t
		Tn
	x
			t
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Siemens Schweiz AG	User Manual OEM			CE1U2353en01a
HVAC Products	The settings in detail			22. November 2006