EVCO EVK404N9 User Manual
Page 2
Evco S.p.A. • Code 104K404E114 • page 2/8
4.2.5
Operation in cooling or heating mode from
digital input 1 (CFG parameter = 4)
CODE MEANING
SP1
work set-point with heating mode operation
SP2
work set-point with cooling mode operation
r0
work set-point differential with heating mode
operation (SP1)
r6
work set-point differential with cooling mode
operation (SP2)
If the digital input 1 is not active, the device will operate with heating
mode (see paragraph 4.2.2); the set-point associated with the regula-
tion will be SP1.
If the digital input 1 is active, the device will operate with cooling
mode (see paragraph 4.2.1); the set-point associated with the regula-
tion will be SP2.
4.2.6
Operation in cooling mode with Energy Saving
function from digital input 1 (CFG parameter = 5)
CODE MEANING
SP1
work set-point with digital input 1 not active
SP2
work set-point with digital input 1 active
r0
work set-point differential with digital input 1 not
active (SP1)
r6
work set-point differential with digital input 1
active (SP2)
The device will operate with cooling mode operation (see
paragraph 4.2.1).
If digital input 1 is not active, the set-point associated to the regulation
will be SP1; if the digital input 1 is active, the set-point associated to the
regulation will be SP2.
4.2.7
Operation in heating mode with Energy Saving
function from digital input 1 (CFG parameter = 6)
CODE MEANING
SP1
work set-point with digital input 1 not active
SP2
work set-point with digital input 1 active
r0
work set-point differential with digital input 1 not
active (SP1)
r6
work set-point differential with digital input 1
active (SP2)
The device will operate with heating mode (see paragraph 4.2.2).
If digital input 1 is not active, the set-point associated to the regulation
will be SP1; if the digital input 1 is active, the set-point associated to the
regulation will be SP2.
4.2.8
Operation for cooling and heating mode
with two independent work set-points
(CFG parameter = 7)
CODE MEANING
SP1
work set-point with heating mode operation
SP2
work set-point with cooling mode operation
r0
work set-point differential with heating mode
operation (SP1)
r6
work set-point differential with cooling mode
operation (SP2)
If the magnitude exceeds SP1, the relays K1 and K2 will remain off.
If the magnitude is within r0, the relays K1 and K2 will be on (and off)
in succession; switch-ons (and switch-offs) will be distributed propor-
tionally to the number of relays used for the regulation (two).
If the magnitude is below “SP1 - r0”, the relays K1 and K2 will
remain on.
If the magnitude exceeds SP2, the relays K3 and K4 will remain off.
If the magnitude is within r6, the relays K3 and K4 will be on (and off)
in succession; switch-ons (and switch-offs) will be distributed propor-
tionally to the number of relays used for the regulation (two).
If the magnitude exceeds “SP2 + r6”, the relays K3 and K4 will
remain on.
4.2.9
Operation with two independent neutral areas
(parameter CFG =8)
CODE MEANING
SP1
work set-point SP1 (the magnitude associated to the ad-
justment is that detected by probe 1)
r0
differential (of the work set-point SP1) of the relay with
cooling mode operation (relay K2)
r6
differential (of the work set-point SP1) of the relay with
heating mode operation (relay K1)
r11
neutral area value (of the work set-point SP1)
SP2
work set-point SP2 (the magnitude associated to the ad-
justment is that detected by probe 2)
r12
differential (of the work set-point SP2) of the direct opera-
tion relay (for example, to dehumidify; relay K4)
r13
differential (of the work set-point SP2) of the heating mode
operation relay (for example, to humidify; relay K3)
r14
neutral area value (of the work set-point SP2)
If the magnitude detected by probe 1 is within r11, the K1 and K2
relays will remain off.
If the magnitude detected by probe 1 drops below “SP1 - r11 - r6”,
relay K1 will be switched on (it will be switched off over “SP1 - r11”).
If the magnitude detected by probe 1 rises above “SP1 + r11 + r0”,
relay K2 will be switched on (it will be switched off below “SP1 + r11”).
If the magnitude detected by probe 2 is within r14, the K3 and K4
relays will remain off.
If the magnitude detected by probe 2 drops below “SP2 - r14 - r13”,
relay K3 will be switched on (it will be switched off over “SP2 - r14”).
If the magnitude detected by probe 2 rises above “SP2 + r14 + r12”,
relay K4 will be switched on (it will be switched off below “SP2 + r14”).
4.2.10
Operation in cooling or heating mode from probe
2 (CFG parameter = 9)
CODE MEANING
SP1
work set-point with heating mode operation
SP2
work set-point with cooling mode operation
r0
work set-point differential with heating mode
operation (SP1)
r6
work set-point differential with cooling mode
operation (SP2)
r17
magnitude value detected by probe 2 below which the
heating mode operation is enabled
r18
magnitude value detected by probe 2 over which the
cooling mode operation is enabled
The device will operate with cooling or heating mode (see
paragraph 4.2.8).
For the cooling mode operation (or heating mode) to be enabled, the
magnitude detected by probe 2 must have remained in continuous
mode above that established with parameter r18 (or below that
established below r17) for the time established with parameter r21.
4.3
Soft switch-on function
The Soft switch-on allows to increase (heating mode operation) or
decrease (cooling mode operation) the work set-points gradually
on device switch-on.
On expiry of the time established with parameter r15, the set-points are
increased or decreased by one unit (temporary set-points) starting
from the value of the magnitude to device switch-on until reaching
the values set, if and when the function is concluded.
In the example:
• the operation is for heating mode
• the magnitude value on device switch-on is 16
• the work set-point SP1 is set at 20.
4.4
Device operation in the presence of probe 2
In the presence of probe 2, device operation depends mainly on
parameter P9.
No probe (parameter P9 = 0)
Factory settings.
Differential operation (parameter P9 = 1); only if CFG = 0, 1, 2 or 3
The magnitude associated to the regulation will be "magnitude de-
tected by probe 1 - magnitude detected by probe 2".