Carrier Comfort NUI Usuario, Manual De Instalación página 9

Installation
PARAMETER
FEATURE
NUMBER
AUXILIARY
152
HYSTERESIS
SANITARY HOT
153 WATER IN OFF
MODE
EXTERNAL HEAT
154
SOURCE STATUS
MAIN WATER PUMP
155 LOGIC VS EHS
STATUS
TRACE HEATER /
156 ADDITIONAL WP
LOGIC
ADDITIONAL WATER
157
PUMP LOGIC
DELTA AIR
158
SET-POINT
The parameters which are read only and are not editable by user, Key pad lock (
parameters.
At installation fill in the installer value if default value has been changed.
DESCRIPTION
This code is use to set the hysteresis temperature
needed to activate the external heat source.
This code is use to define if, when system mode is off,
the sanitary hot water logic can be activated:
1. Yes, SHW logic is always actives. If OAT < Par148,
Heat Pump will turn ON to produce SHW.
2. No, SHW logic can be activated only in Heat or Cool
mode. No SHW production when OAT < Par148.
This code is use to define the external heat source status
when EHS is activated and OAT < temperature value set
in Code 148:
0. Always On
1. On/Off depending by actual Room Temperature vs
room temperature set-point (same hysteresis of Ther-
mostat function). Incase of NUI is not installed or room
sensor unavailable, On/Off depending by water set-point
(+1/-4 °C of hysteresis)
2. On/Off depending by water set-point (+1/-4 °C of
hysteresis)
This code is use to define the water pump logic when
EHS is activated and OAT < (temperature value set in
Code 148):
0. Always Off
1. On/Off depending by EHS On/Off status
2. Always On
This code is use to select the output connected at PIN
12 on terminal strip. In case an additional water pump
option is active, this code is use to select its operating
logic vs the SHW request (if OAT > (temperature value
set in Code 148).
0. Trace heater installed for the anti frost logic
1. Additional water pump On/Off depending by main
water pump logic. This it means that in case of SHW
activation, the additional WP will be ON.
2. Additional water pump On/Off depending by
main water pump logic, but always OFF when SHW is
activated.
This code is use to define the additional water pump
logic, if it has been installed, when OAT < temperature
value set in Code 148:
0. Always Off
1. On/Off depending by EHS On/Off status
2. Always On"
This code is use to define the hysteresis versus the
temperature room Set-Point to Off the Unit when the
System Type is NUI installed and used as Thermostat
(100 NUI code = 4).
VALUE
RANGE
Min Max
1°C 20°C
1 2
0 2
0 2
0 2
0 2
0.2°C 1°C
) icon will be displayed on the screen for those
STANDARD
5°C
1
1
1
1
2
0.3 °C
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