Air and Water cooled inverter chillers and heat pump
D-EOMZC00105-17EN
Operation Manual
22/84
EWAD TZ - EWAD TZ B -EWWD VZ
Air and Water cooled inverter chillers and
heat pump
Setpoint/Sub-Menu
Default
Range
Description
TZ/TZ B
VZ
Start Up DT=
2.7°C
2.7°C
0.0…5.0°C
Offset to start thermostat control
Shut Dn DT=
1.0°C
1.5°C
0.0…1.7°C
Offset to standby
Stg Up DT=
0.5°C
0.5°C
0.0…1.7°C
Offset to allow compressor starts
Stg Dn DT=
1.0°C
0.7°C
0.0…1.7°C
Offset to force one compressor off
Stg Up Delay=
5 min
3 min
0…60 min
Compressor start interstage
Stg Dn Delay=
3 min
3 min
3…30 min
Compressor stop interstage
Strt Strt Dly=
20min
15min
15…60 min
Compressor Start to Start delay
Stop Strt Dly=
5min
3min
3…20 min
Compressor Stop to Start delay
Ice Cycle Dly=
12h
12h
1…23h
Ice cycle delay
Lt Ld Stg Dn %=
40%
20%
20…50%
Circuit capacity threshold to stage down one compressor
Hi Ld Stg Up %=
80%
50%
50…100%
Circuit capacity threshold to stage up one compressor
Max Ckts Run=
2
2
1…2
Limit to the number of circuit to be used
C1 Sequence #=
1
1
1…2
Manual sequence of circuit #1
C2 Sequence #=
1
1
1…2
Manual sequence of circuit #2
Next Crkt On=
0
0
-
Shows next circuit to be started up
Next Crkt Off=
0
0
-
Shows next circuit number to be stopped
4.2.2
Network Ctrl
This page resumes all settings related to Network control.
Setpoint/Sub-Menu
Default
Range
Description
TZ / TZ B
VZ
Control Source=
Local
Local
Local, Network
Local Network control selection
Act Ctrl Src=
Local
N/A
Local, Network
Actual control between Local, Network
Netwrk En SP=
Disable
Disable
Enable, Disable
Enable unit command from BMS
Netwrk Mode SP=
Cool
Cool
-
Cool, Ice, Heat (NA), Cool/Heat Recovery
Netwrk Cool SP=
6.7°C
6.7°C
-
Cooling setpoint from BMS
Netwrk Cap Lim=
100%
100%
-
Capacity limitation from BMS
Netwrk HR SP=
45.0°C
N/A
-
Heat recovery setpoint from BMS
Network Heat SP=
N / A
45.0°C
-
Heating setpoint from BMS (W/C Units only)
Netwrk Ice SP=
-4.0°C
-4.0°C
-
Ice setpoint from BMS
Netwrk Current SP=
800A
800A
-
Sepoint for current limitation from BMS
Remote Srv En=
Disable
Disable
Enable, Disable
Remote server enable
4.2.3
Compressor Vfd Setup (A/C Units only)
This page contains basics Vfd Settings. It will be possible to set the Modbus address of each inverter installed
on compressors. This function is supposed to be activated in case of compressor replacement. The page will
also contain the Modbus setup parameters like baud rate, parity etc.
Setpoint/Sub-Menu
Default
Range
Description
Baud Rate=
19200
4800, 9600, 19200, 38400
Modbus communication speed
Parity=
None
None, Odd, Even
Parity
Two Stop Bits=
No
No, Yes
Number of stop bits
485 Resistance=
Active
Active, Passive
RS485 Termination resistance
Set Inv1 Fltr=
Hold
Hold, Exec
Command to enable communication filter on the compressor 1
Set Inv2 Fltr=
Hold
Hold, Exec
Command to enable communication filter on the compressor 2
4.2.4
Pumps
This page contains the settings to define the operation of the primary/backup pumps, the running hours of
each pump and all parameters to configure the behavior of the pump driven with an inverter.
Setpoint/Sub-Menu
Default
Range
Description
TZ / TZB
VZ
Evp Pmp Ctrl=
#1 Only
#1 Only
#1 Only, #2 Only, Auto,
#1 Primary, #2 Primary
Set number of Evaporator pumps operational and which
priority.
Evap Recirc Tm=
30s
30s
0…300s
Water recirculating timer
Evap Pmp 1 Hrs=
0h
0h
Running Hours Evaporator Pump 1 (if present)
Evap Pmp 2 Hrs=
0h
0h
Running Hours Evaporator Pump 2 (if present)
Speed 1=
80%
N/A
0-100%
Speed when the input Double Speed Switch is open
Cnd Pump Ctrl=
N/A
#1 Only
#1 Only, #2 Only, Auto,
#1 Primary, #2 Primary
Set number of Condenser pumps operational and which
priority.