Emerson ALCO CONTROLS EXD-S Serie Mode D'emploi

Emerson Electric GmbH & Co OHG
Heerstr.111 - D 71332 Waiblingen
www.alco-controls.com –
EXD-S.. Stand Alone Driver Modules are for driving ALCO stepper motor
driven electronic expansion valves series EXV-5, -6, -7, -8. These instructions
are for versions supplied after Datecode 2803.
!
Safety instructions:
• Read operating instruction thoroughly. Failure to comply can result in
device failure, system damage or personal injury.
• It is intended for use by persons having the appropriate knowledge and skill.
• Switch off all voltages / currents before cabling.
• Comply with local electrical regulations when wiring
• Do not operate system before all cable connections are completed.
• Do not apply 110/220/230 V to any terminal of driver module
Installation and wiring
• Install EXV in system per operating instructions of valve.
• Make sure that driver type matche to the type of valve and refrigerant in the
system as follows:
Driver module type
EXD-S05
EXD-S06
EXD-S07
EXD-S08
EXD-S15
EXD-S16
EXD-S17
EXD-S18
EXD-S25
EXD-S26
EXD-S27
EXD-S28
EXD-S35 / EXD-S35S
EXD-S36 / EXD-S36S
EXD-S37
EXD-S38
EXD-S45
EXD-S46
• Install Driver Module, pressure transmitter and temperature sensor.
• Set-up all wire connections as shown wiring diagram.
• Recommended wire cross section between 0.5 mm
• Keep sensor cables separate from all other power and driver lines.
Start-up procedure:
• Do not apply voltage to the driver before completion of wiring.
• Do not operate the driver and valve when the system is under vaccum or
without refrigerant except for closing valve before charging of system.
• Vacuum the entire system.
• Warning: Alco EXVs are delivered at half open position. Do not charge
system before closure of valve.
• Apply supply voltage to driver module for the following times without
activation of digital input to terminals ID/Avss of driver module:
Valve Time, seconds
EX5/EX6 Min: 2
EX7/EX8 Min: 6
• After closure of valve, intrup power supply to driver module and charge the
system with refrigerant.
• Start the system and check the superheat and operating conditions.
Technical data, power supply:
• Main supply voltage: 24V AC (+10%, -15%), 50-60Hz; 24 VDC (+10%, -0%).
Power supply line to driver to be protected by 1.0 A external fuse.
• Use a safety class II transformer. Minimum power required 20VA.
• Emergency supply voltage (from ECP-024): approx. +18 V DC.
Technical data, inputs:
• 1 analogue input 4-20mA for pressure transmitter, measurement range -0.8 to 7
bar (PT4-07S) or 0 to 18 bar (PT4-18S).
• 1 NTC analogue input, very fast responce with precision ±0.5K
• 1 digital input for 5V/5mA insulated contact (potential free/dry contact)
Outputs:
• 4 current-outputs for stepper motor of EX5/EX6/EX7/EX8.
Nominal current: 0.5A for EX5/EX6, 0.75A for EX7 and 0.8A for EX8.
Maximum cable length: 6 meter AWG20/22.
• 1 digital output for alarm relay, rated power 10VA, 0.5A resistive at 24VAC.
Contact normally open. (The contact is closed under normal operating
conditions; it is open under alarm conditions or when there is no power supply).
Number of automatic operating cycles: (relay) 100.000.
• 1 +24VDC supply output for PT4.
Uninterruptible power supply ECP-024
• Power supply voltage: 24 VAC ± 10%
• Power outputs: Two, each +18VDC
Document Nr.: A6.5.070 / 08
ALCO CONTROLS
Tel.: 07151 509-0 - Fax.: -200
alcoservice@ecopeland.com
Valve Refrigerant
EX5 R22
EX6 R22
EX7 R22
EX8 R22
EX5 R407C
EX6 R407C
EX7 R407C
EX8 R407C
EX5 R134a
EX6 R134a
EX7 R134a
EX8 R134a
EX5 R404A
EX6 R404A
EX7 R404A
EX8 R404A
EX5 R410A
EX6 R410A
2 2
and 2.5 mm .
Max: 30
Max: 30
Replacement for A6.5.070 / 07
Operating Instructions
Stand Alone Driver Module EXD-S Series
for Electronic Expansion Valves EX5 ... EX8
Indicator and Error Messages
Description Priority
level
Off
Power supply
Valve is opening
Valve is fully open
Valve is closing
Valve is fully close
EEPROM read err. 1, High
Motor connection
error
Pressure and or
temperature
probe(s) error
EEPROM write error 4, Low
Note: In case where more than one alarm is active, the alarm with higher priority
is displayed.
Wiring Diagram
Digital output
Power
alarm relay
output for
second
driver in
system, if
Valve is opening
available
Valve is closing
*) These terminals are for use with specific
controller and should not be wired.
**) Digital input: The contact should be
wired based on system operation
configuration:
a) Direct start and stop of compressor:
The contact will be activated/deactivated as
the first stage compressor starts or stops.
b) Pump down:
The contact will be activated/deactivated as
cooling demand activated/deactivated. The
compressor will be activated/deactivated by
low pressure switch.
Date: 21.04.2006
Valve opens Valve closes
green LED Green LED
- Off Off
- - -
- Blink Off
- On Off
- Off Blink
- Off On
Off Off
2 Blink Blink
3 Off Blink
Off Off
Electrical
connection plug
EX5-Nxx
GB
Power Alarm
green LED red LED
Off Off
On Off
On Off
On Off
On Off
On Off
On Blink
On On
On On
On On
Power supply
Transformer
Fuse
1.0 A
Electrical
connection
PCN: 862970