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7
OPTIONS
7.1 Total Heat Recovery (Optional – A/C units only)
This chiller can handle a total heat recovery option. This feature will require an additional module and sensors
to read the entering and leaving heat recovery water temperatures, command a heat recovery water pump.
The heat recovery is enabled through the Q8 switch installed on the unit and requires to adjust settings on the
unit controller in order to make it work as needed. First of all the function needs to be enabled on the main
controller in order to display all the settings related to this function. With reference to section 4.3.5 the heat
recovery enable setpoint has to be chanded to Enable.
When this is done the controller will need to be reset by applying the changes.
After the reboot all the heat recovery data and settings will be displayed on the HMI. In the View/Set Unit –
Temperatures the heat recovery entering and leaving water temperatures will be then visible.
HR LWT=
-273.1°C
HR EWT=
-273.1°C
Additionally the Heat Recovery setpoint and differential will become visible and can be adjusted as needed:
Setpoint/Sub-Menu
HR EWT Stp
HR EWT Dif
7.2 Energy Meter including Current Limit (Optional)
An energy meter can be optionally installed on the unit. The energy meter is connected through Modbus to the
unit controller, which can display all relevant electrical data such as:
Line to Line Voltage (per phase and average)
Line Current (per phase and average)
Active Power
Cos Phi
Active Energy
More details are described in chapter 0. All these data can be also accessed from a BMS by connecting it to
a communication module. See the communication module manual for details on the device and parameter
settings.
Both the energy meter device and the unit controller need to be properly set. The instructions below detail how
to set the energy meter. Refer to the specific instructions of the energy meter for more detail on the operation
of the device.
Energy Meter Settings (Nemo D4-L / Nemo D4-Le)
Password (Down+Enter) 1000
Connection
Address
Baud
Par
Time Out
Password 2
CT ratio
VT ratio
D-EOMZC00105-17EN
Operation Manual
82/84
Air and Water cooled inverter chillers and heat pump
Setpoint/Sub-Menu
Default
Apply Changes=
No
C1 # Of Fans=
6
Heat Recovery=
Enable
Heat Recovery Leaving Water Temperature (displayed only if Heat Recovery set on)
Heat Recovery Entering Water Temperature (displayed only if Heat Recovery set on)
Default
Range
30.0...50.0°C
40.0°C
1.0...10.0°C
2.0°C
3-2E
020
19.2
None
3
2001
see CT label current transformer ratio (i.e if CT is 600:5, set to 120)
1
Range
Description
No, Yes
Number of fans available.
Disable, Enable
Description
Heat Recovery
Entering
Heat Recovery Water Temperature differential
three phase Aron System
kbps
parity bit
sec
no voltage transformers (unless 690V chiller)
Water Setpoint
EWAD TZ - EWAD TZ B -EWWD VZ
Air and Water cooled inverter chillers and
heat pump
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