Operating instruction
EXD-HP1/2 Controller with ModBus
communication capability
Emerson Climate Technologies GmbH
Date: 17.12.2020
Am Borsigturm 31 I 13507 Berlin I Germany
EXD-HP12_OI_EN_DE_RU_1220_R06_865921.docx
Manual alarm reset/clearing functional alarms (except hardware errors):
Press
and
together for 5 seconds. When the clearing is done, “CL”
message appears for 2 seconds.
M a n u a l m o d e o pe r a t i o n
Press
and
together for 5 seconds to access to manual mode operation.
List of parameters in scrolling sequence by pressing
button
Code Parameter description and choices
Min Max Factory
setting
Field
setting
1Ho Manual mode operation; circuit 1
0
1
0
0 = off;
1 = on
1HP Valve opening (%)
0
100
0
2Ho Manual mode operation; circuit 2
0
1
0
0 = off
1 = on
2HP Valve opening (%)
0
100
0
Note: During manual operation, functional alarms such as low superheat are
disabled. It is recommended to monitor the system operation when the controller
is operated manually. Manual operation is intended for service or temporary
operation of valve at a specific condition. After achieving the required operation,
set the parameter 1Ho and 2Ho at 0 so the controller automatically operates the
valve(s) according to its setpoint(s).
L i s t o f pa r a me t e r s i n sc r o l l i ng s e q ue n c e b y p r e s si n g
b u t t o n :
Code
Parameter description and choices
Min
Max Factory
setting
H5 Password
1
1999
12
Adr ModBus address
1
127
1
br
Modbus baudrate
0
1
1
PAr Modbus parity
0
1
0
-C2 Circuit 2 of EXD-HP2 enabled
0
1
0
0 = Enabled;
1 = Disabled
-uC Units conversion
0
1
0
0 = °C, K, bar;
1 = F, psig
This Parameter effects only the display. Internally the units are allways SI-
based.
HP- Display mode
0
2
1
0 = No display
1 = Circuit 1
2 = Circuit 2 (only EXD-HP2)
Parameters Circuit 1
1uE Function
0
1
1
0 = Superheat control
1 = Economizer control (Only for R410A/R407C/R32)
1u4 Superheat control mode
0
4
0
0 = Standard control coil heat exchanger
1 = Slow control coil heat exchanger
2 = fixed PID
3 = fast control plate heat exchanger (not for 1uE = 1)
4 = Standard plate heat exchanger (not for 1uE = 1)
1u0 Refrigerant
0
15
2
0 = R22
1 = R134a 2 = R410A 3 = R32
4 = R407C
5 = R290* 6 = R448A 7 = R449A 8 = R452A 9 = R454A*
10 = R454B* 11 = R454C* 12 = R513A 13 = R452B* 14 = R1234ze*
15 = R1234yf *
*) EXN not permitted
*)
Warning -Flammable refrigerants: EXD-HP1/2 has a potential
ignition source and does not comply with ATEX requirements. Installation
only in non-explosive environment. For flammable refrigerants only use
valves and accessories approved for it!
1uP Installed pressure sensor type
0
3
2
0 = PT5N-07…
1 = PT5N-18…
2 = PT5N-30…
3 = PT5N-10P-FLR
1uu Start valve opening (%)
10
100
20
1u9 Start opening duration (second)
1
30
5
1uL Low superheat alarm function
0
2
1
0 = disable (for flooded evaporator)
1 = enable auto reset
2 = enable manual reset
1u5 Superheat set-point (K)
If 1uL = 1 or 2 (enabled auto or manual reset)
If 1uL = 0 (disabled)
3
0.5
30
30
6
6
1u2 MOP function
0
1
1
0 = disable
1 = enable
1u3 MOP set-point (°C) saturation temperature
Factory setting according to selected refrigerant
(1u0). The default value can be changed
see MOP table
Code
Parameter description and choices
Min
Max Factory
setting
1P9 Low pressure alarm mode circuit 1
0
2
0
0 = disabled
1 = enabled auto reset
2 = enabled manual reset
1PA Low pressure alarm cut-out circuit 1
-0.8
17.7
0
1Pb Low pressure alarm delay circuit 1
5
199
5
1Pd Low pressure alarm cut-in circuit 1
0.5
18
0.5
1P4 Freeze protection alarm function
0
2
0
0 = disabled,
1 = enabled auto-reset,
2 = enabled manual reset
1P2 Freeze alarm cut-out circuit 1
-20
5
0
1P5 Freeze protection alarm delay, sec.
5
199
30
1P- Superheat control circuit 1 fixed PID (Kp factor)
Display 1/10K
0.1
10
1.0
1i- Superheat control circuit 1 fixed PID (Ti factor)
1
350
100
1d- Superheat control circuit 1 fixed PID (Td factor)
Display 1/10K
0.1
30
3.0
1EC Hotgas temperature sensor source
0
1
0
0 = ECP-P30
1 = Via Modbus input
1PE Economizer control circuit 1 fixed PID
(Kp factor) Display 1/10K
0.1
10
2.0
1iE Economizer control circuit 1 fixed PID
(Ti factor)
1
350
100
1dE Economizer control circuit 1 fixed PID
(Td factor)
Display 1/10K
0.1
30
1.0
1uH High superheat alarm mode circuit 1
0 = diabled
1 = enabled auto-reset
0
1
0
1uA High superheat alarm setpoint circuit 1
16
40
30
1ud High superheat alarm delay circuit 1
1
15
3
1E2 Positive correction of measured Hotgas
temperature.
0
10
0
Parameters Circuit 2 (only EXD-HP2)
Code
Parameter description and choices
Min
Max Factory
setting
2u4 Superheat control mode
0
4
0
0 = Standard control coil heat exchanger
1 = Slow control coil heat exchanger
2 = fixed PID
3 = fast control plate heat exchanger
4 = Standard plate heat exchanger
2u0 System Refrigerant
0
5
2
0 = R22
1 = R134a 2 = R410A 3 = R32
4 = R407C
5 = R290* 6 = R448A 7 = R449A 8 = R452A 9 = R454A*
10 = R454B* 11 = R454C* 12 = R513A 13 = R452B* 14 = R1234ze*
15 = R1234yf *
*) EXN not permitted
*) Warning -Flammable refrigerants: EXD-HP1/2 has a potential
ignition source and does not comply with ATEX requirements. Installation
only in non-explosive environment. For flammable refrigerants only use
valves and accessories approved for it!
2uP Installed pressure sensor type
(When DI2 is off)
0
3
1
0 = PT5N-07…
1 = PT5N-18…
2 = PT5N-30…
3 = PT5N-10P-FLR
2uu Start valve opening (%)
10
100
20
2u9 Start opening duration (second)
1
30
5
2uL Low superheat alarm function
0
2
1
0 = disable (for flooded evaporator)
1 = enable auto reset
2 = enable manual reset
2u5 Superheat set-point (K)
If 2uL = 1 or 2 (enabled auto or manual reset)
If 2uL = 0 (disabled)
3
0.5
30
30
6
6
2u2 MOP function
0
1
1
0 = disable
1 = enable
2u3 MOP set-point (°C) saturation temperature
Factory setting according to selected refrigerant
(2u0). The default value can be changed
see MOP table
2P9
Low pressure alarm mode circuit 2
0
2
0
0 = disabled
1 = enabled auto reset
2 = enabled manual reset
2PA Low pressure alarm cut-out (bar) circuit 2
-0.8
17.7
0
2Pb Low pressure alarm delay (sec) circuit 2
5
199
5
2Pd Low pressure alarm cut-in (bar) circuit 2
0.5
18
0.5
2P4 Freeze protection alarm function
0
2
0
0 = disable,
1 = enable auto-reset,
2 = enable manual reset
