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SK2017 AHRI PFWSL-V/P-AECM-001
F.
Control Specifications: Flexible Function PCB – W Type Control
F.1.
Features
a)
Integrated fan relays for zone control applications.
b)
ON/OFF thermostat input and low-voltage modulating fan speed input flexibility.
c)
Simple error diagnostic and LED error display.
F.2.
I/O Port Definitions
I/O
Code
2-Pipe
4-Pipe
Analogue input
Coil temperature sensor
AI1
Cooling / heating coil sensor
(Ti1)
Cooling only coil sensor
(Ti1)
Voltage input
High fan speed
H
230VAC input signals from wired thermostat
Medium fan speed
M
Low fan speed
L
Phase
L1
External 230VAC power supply connection to the PCB.
Max length: 5 m.
Neutral
N1, N2
Earth
GND
Signal Input
Modulating signal
+/-
Low voltage modulating signal input (standard 0~5VDC;
optional 0~10VDC)
Digital input
Programming interface
TTL
Low voltage digital signal input for board programming
Float switch
Float
N/A
Voltage output
Water pump
PUMP
N/A
EC motor
CN4
5-wire connection with 230VAC power supply to EC motor
and 0-5VDC modulating signal output
Stepping motor
CN1, CN2
N/A
Digital output
LED display
X-DIS
Low-voltage output
Voltage-free output
Alarm
ALARM
Voltage-free alarm contact:
(a) Standard configuration is (NC).
F.3.
Onboard Configuration
The PCB can be configured for different modulating signal inputs.
Refer to jumper configuration table below.
Code
State
Description
S1
Open
PCB configured for 0~5VDC modulating signal input.
S1
Closed
PCB configured for 0~10VDC modulating signal input.