Terminal AI3 / AI3: Analogue Input Capacity control
• Be sure not input more than DC10 V in analogue input terminal.
• To ease the integration of the DX COIL with the DDC the capacity control is able to operate with a STEPPED or
LINEAR function from the analogue input.
• To select either a STEPPED (default) or LINEAR response, from the analogue input, use SW501 Bit4.
• Terminal AI4 / AI4 cannot be used.
SW501 Bit4 Function
OFF STEP response to analogue input
ON LINEAR response to analogue input
TCB-IFDMR01UP-UL
(Terminal block with relay)
Shield wire MAX. 656'2 (200 m
)
Locally procured
Input
0 - 10 V
0 - 10 V Signal (+)
AI3
AI3
GND (-)
Cooling Mode
Capacity control STEP
ΔT = TA (°F) - Set temp. (°F)
SW501
ON
(Linear)
Bit4
OFF
(Stepped)
(V)
10.00 10.00
9.50
9.00
8.50
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.50
0.00
8.20
7.45
6.70
5.95
5.20
4.45
3.70
2.95
2.20
1.45
0.70
0.00
(Stepped) (Linear)
8.00
7.25
6.50
5.75
5.00
4.25
3.50
2.75
2.00
1.25
0.50
9.30
8.80
8.30
7.80
6.80
5.80
4.80
3.80
2.80
1.80
1.30
STEP 11
(Max demand, Approx. ΔT = +4°F (+2°C)
STEP 10
STEP 9
STEP 8
(Approx. ΔT = +2°F (+1°C)
STEP 7
STEP 6
STEP 5
STEP 4
(Keep the current temperature, ΔT = 0°F)
STEP 3
STEP 2
STEP 1
(Min demand, Approx. ΔT = -2°F (-1°C)
STEP 0 (No operation)
SW501
ON
(Linear)
Bit4
OFF
(Stepped)
10.00
10.00
9.00
8.00
7.00
6.00
5.00
4.50
4.00
3.50
3.00
2.50
2.00
1.50
9.70
8.95
8.20
7.45
6.70
5.95
5.20
4.45
3.70
2.95
2.20
1.45
1.00 0.70
0.00
0.00
Heating Mode
Capacity control STEP
ΔT = Set temp. (°F) - TA (°F)
(V)
STEP 13
(Max demand, Approx. ΔT = +4°F (+2°C)
(Stepped)
(Linear)
STEP 10
STEP 9
STEP 8
(Approx. ΔT = +2°F (+1°C)
STEP 7
STEP 6
STEP 5
STEP 4
(Keep the current temperature, ΔT = 0°F)
STEP 3
STEP 2
STEP 1
(Min demand, Approx. ΔT = -2°F (-1°C)
STEP 0 (No operation)
STEP 11
STEP 12
9.50
8.75
8.00
7.25
6.50
5.75
5.00
4.25
3.50
2.75
2.00
1.25
8.80
7.80
6.80
5.80
4.80
4.30
3.80
3.30
2.80
2.30
1.80
1.30
0.50 0.80