Condensing Unit Controller EC2-5X1
Parameter
F
Modulating Parameters
Min
Max
Unit
Def
Min
Max
Unit
Def
F2
Minimum output value
-
-
-
-
10.0
100.0
%
20.0
F3
Maximum output value
-
-
-
-
10.0
100.0
%
100.0
F6
PWM rate (Digital Scroll compressor)
-
-
-
-
10
20
sec
20
EC2-511
EC2-551
Modulation range of Copeland Digital Scroll compressor:
F2
will set minimum capacity of Copeland Digital Scroll compressor
Minimum capacity: F2 => 10%
With a two compressor unit, a small capacity step occurs when the second
compressor starts: capacity when second compressors starts= 50% (fixed
capacity compressor) + F2/2 Digital Scroll compressor capacity
F3
will set max capacity: with F3 = 80%, compressor will pump during max 80%
of the 20 sec cycle, so max 16 seconds.
Modulation parameter
PWM Cycle - Modulation cycle
F2 = 20%
Ì
4 sec
F3 = 100%
Ì
16 sec
0
4
10
PWM Cycle in sec
Load Sequence
Unload Sequence
Modulation parameter
PWM Cycle - Modulation cycle
F2 = 20%
Ì
4 sec
F3 = 100%
Ì
16 sec
20
0
4
10
20
0
4
10
PWM Cycle in sec
Load Sequence
Unload Sequence
20
F6
: The Pulse Width Modulated signal (PWM signal) is the modulation period of a
Copeland Digital Scroll compressor which can be adjusted from 10 to 20 seconds to
ensure the closest modulation time period.
Digital running only
Digital
Digital
To
ta
l O
ut
pu
t
Fixed
Capacity
# comp
9.4
19.8
Cap
acit
y
(kW
)
Digital & Fixed running
Digital running only
Digital
Digital
To
ta
l O
ut
pu
t
Fixed
Capacity
# comp
9.4
19.8
Cap
acit
y
(kW
)
Digital & Fixed running
Digital
Digital
To
ta
l Ou
tp
ut
Fixed
Capacity
# comp
9.4
19.8
Cap
acit
y
(kW
)
Digital running only
Digital & Fixed running
Digital
Digital
To
ta
l Ou
tp
ut
Fixed
Capacity
# comp
9.4
19.8
Cap
acit
y
(kW
)
Digital running only
Digital & Fixed running
Example OMTQ-90D
1 Digital Comp with F2 = 20% & F3 = 100%
1 fixed capacity comp
Example OMTQ-90D
1 Digital Comp with F2 = 10% & F3 = 100%
1 fixed capacity comp
14
Part no: 3125495
C6.1.3/0505-0705/E
