9
CONTROLS QUICK SET--UP
The following information will provide a quick guide to setting up
and configuring the 48/50HC series units with ComfortLink
controls. Unit controls are pre-configured at the factory for
factory-installed options. Field-installed accessories will require
configuration at start-up. Service Test is recommended for initial
start--up. Additionally, specific job requirements may require
changes to default configuration values. See the CCN and Display
parameter tables and other sections of these instructions for more
details. Refer to the Major System Components or accessory
installation instructions for specific wiring detail.
Control Set Point and Configuration Log
During start up, accessory installation, and equipment service set
points and/or configuration changes might have to be made. When
setting set points or changing configuration settings,
documentation is recommend. The Control Log starting on page
98. should be filled out and left with the unit at all times, a copy
should also be provided to the equipment owner.
Thermostat Control
Wire accessory thermostat to the corresponding R, Y1, Y2, W1,
W2, and G terminals on the field connection terminal board located
at the unit control box.
The Unit Control Type configuration, Configuration
UNITU.CTL, default value is for Thermostat (2) so there is
no need to configure this item.
The Thermostat Control Type, Configuration UNITT.CTL,
selects the unit response to the thermostat inputs above.
NOTE: May not be compatible with heat anticipator thermostats.
Space Temperature Sensor Control -- Direct Wired
(T--55 or T--56 or T--59)
Wire accessory space temperature sensor(s) to the T-55 terminals
on the field connection terminal board located at the unit control
box. Refer to Field-Installed Accessories section for additional
information.
The Unit Control Type configuration, Configuration
UNITU.CTL, must be set to Space Sensor (3). The jumper
wire in the installer’s packet must be connected between R and W1
on TB for heating mode to operate.
T--58 Communicating Room Sensor
Install the T-58 communicating thermostat. Connect the CCN
communication bus from the T-58 to the CCN terminals on the
field connection terminal board located at the unit control box.
Configure the unit’s CCN communication element number, bus
number, and baud rate. Configure the T--58’s CCN communication
bus number and baud rate the same as the unit, while the element
number has to be different. Configure the T--58 to send SPT to the
unit’s element number. Refer to the Field--Installed Accessories
section for additional information.
The Unit Control Type configuration, Configuration
UNITU.CTL, must be set to Space Sensor (3). The jumper
wire in the installer’s packet must be connected between R and W1
on TB for heating mode to operate.
CCN Linkage Control
The CCN communication must be properly configured for the
48/50HC units and all other devices. Linkage configuration is
automatically done by the supervisory CCN Linkage device.
The Unit Control Type configuration, Configuration
UNITU.CTL must be set to Space Sensor (3). The jumper
wire in the installer’s packet must be connected between R and W1
on TB for heating mode to operate.
Installation of an accessory supply air temperature (SAT) sensor in
the supply duct is recommended for Linkage applications. A
supply duct SAT measurement is valid for heating mode display,
while the factory-standard internal SAT is not valid for heating due
to its location upstream of the heating section. When installing the
supply duct SAT, the heating mode display is enabled by setting
ConfigurationHEATSAT.H to ENBL.
Installation of an accessory return air temperature (RAT) sensor in
the return duct and wired to the space sensor input is recommended
for Linkage applications. This will allow the unit to continue to
run if Linkage communication is lost.
System Pilot -- Communication Space Sensor
Install the System Pilot and connect the CCN communication bus
from it to the unit’s CCN connection on the low voltage terminal
board. Configure the unit’s CCN communication element number,
bus number, and baud rate. Refer to the System Pilot’s installation
instructions for configuring it to be used as a space temperature and
attaching it to a unit.
Thermidistat Control
The thermidistat is a thermostat and humidistat combined
and the inputs are provided on the field connection terminal board. The
unit control type configuration, ConfigurationUNITU.CTL,
default value is for thermostat (2) so there is no need to configure this
item. The thermostat control type configuration,
ConfigurationUNITT.CTL, selects the unit response to the
thermostat inputs above. The space humidity switch configuration,
ConfigurationUNITRH.SW, identifies the normally open or
normally closed status of this input at LOW humidity (only on
Humidi-MiZer units).
Space Humidistat Control
For units with the factory Humidi-MiZer option, the
humidistat input is provided on the field connection
terminal board. The Space Humidity Switch configuration,
ConfigurationUNITRH.SW, identifies the normally open or
normally closed status of this input at LOW humidity.
Relative Humidity Sensor Control
For units with the factory installed Humidi-MiZer option and the
economizer option (with the ECB--economizer control board), the
humidity sensor input is provided on the field connection terminal
board (TB). The sensor can be used in addition to or instead of a
humidistat or thermidistat. The RH Sensor on OAQ Input
configuration, ConfigurationUNITRH.S=YES, identifies that the
sensor is being used instead of an OAQ sensor. Adjust RH setpoints as
needed. Terminal LPWR is the 24vdc loop power and Terminal
SPRH is the 4--20 mA signal input. Refer to the Field Installed
Accessories and Humidi-MiZer Operation sections for more
information.
CCN Communication
Configure ConfigurationCCNCCN.A to desired element
number. (Default is 1.) Configure ConfigurationCCN CCN.B
to desired bus number. (Default is 0.) Configure
ConfigurationCCNBAUD to desired code number for baud
rate (Default is 3 = 9600 baud).
Accessories
Below are quick configuration settings for field installed
accessories. If these accessories were installed by the factory, they
will already be configured. See the Field--Installed Accessories
section, third party control, control connection tables, and CCN or
Display parameter tables for any accessories not mentioned below
and any additional information on accessories.
Economizer
If an Economizer accessory was field installed, the unit must be
configured for it by setting ConfigurationECONEC.EN to
YES. The default settings for the other economizer configurations
should be satisfactory. If they need to be changed, additional
information about these configuration settings can be found in the
Economizer section.
ComfortLINK v1.X
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