York YAFS012 Installation Manual page 36

AFFINITY SINGLE & DUAL CAPACITY SERIES INSTALLATION MANUAL
The Aurora 'Advanced' Control System
Aurora 'Advanced' Control Features
The Aurora 'Advanced' Control
system expands on the
capability of the Aurora 'Base'
Control (ABC) by adding the
Aurora Expansion Board (AXB).
All of the preceding features of
the Aurora 'Base' Control are
included. The following control
description is of the additional
features and capability of the
advanced control.
It is highly recommended the
installing/servicing contractor obtain an
Aurora Interface and Diagnostic Tool (AID)
and specialized training before attempting
to install or service an Aurora 'Advanced'
control system.
The additional AXB features include
the following:
AXB DIP Switch
DIP 1 - ID: This is the AXB ModBus ID and should always read On.
DIP 2 & 3 - Future Use
DIP 4 & 5 - Accessory Relay2: A second, DIP configurable,
accessory relay is provided that can be cycled with the
compressor 1 or 2 , blower, or the Dehumidifier (DH) input. This
is to complement the Accessory 1 Relay on the ABC board.
Position DIP 4 DIP 5
1 ON ON
2 OFF ON
Cycles with CC2 second stage of compressor
3 ON OFF
4 OFF OFF
Advanced Hot Water Generator Control
(Domestic Hot Water Option)
In lieu of the 'Base Hot Water Generator Control', the Advanced
features an AID Tool selectable temperature limit and
microprocessor control of the process. This will maximize hot
water generation and prevent undesirable energy use. An alert will
occur when the hot water input temperature is at or above setpoint
(100°F - 140°F) for 30 continuous seconds (130°F is the default
setting). This alert will appear as an E15 on the AID Tool and the
hot water pump de-energizes. Hot water pump operations resume
on the next compressor cycle or after 15 minutes of continuous
compressor operation during the current thermostat demand cycle.
Since compressor hot gas temperature is dependent on loop
temperature in cooling mode, loop temperatures may be too low
to allow proper heating of water. The control will monitor water and
refrigerant temperatures to determine if conditions are satisfactory
for heating water. LED1 (red LED) will flash code 15 when the DHW
Description
Cycles with Fan or ECM (or G)
Cycles with CC1 first stage of compressor or
compressor spd 1-12
or compressor spd 7-12
Cycles with DH input from ABC board
limit is reached and when conditions are not favorable for water
heating. Error code 15 will also be displayed on the AID Tool in
the fault screen. This flash code is a noncritical alert and does not
necessarily indicate a problem.
Compressor Monitoring
The AXB includes two current transducers to monitor the
compressor current and starting characteristics. High locked rotor
amps, open circuits or welded contactor faults will be detected. A
fault will produce an E10 code.
IntelliZone2 Zoning Compatibility
(Optional IntelliZone2 Zoning)
A dedicated input to connect and communicate with the IntelliZone2 (IZ2)
zoning system is provided on P7. The is a dedicated communication
port using a proprietary ModBus protocol. An AXB can be added to other
selected ABC-only systems as well. Then an advanced communicating
IntelliZone2 zoning system can be added to ABC-only systems. Consult
the IntelliZone2 literature for more information.
Variable Speed Pump
This input and output are provided to drive and monitor a variable
speed pump. The VS pump output is a PWM signal to drive the
variable speed pump. The minimum and maximum level are
set using the AID Tool. 75% and 100% are the default settings
respectively. The VS data input allows a separate PWM signal to
return from the pump giving fault and performance information. Fault
received from the variable speed pump will be displayed as E16.
Modulating Water Valve
This output is provided to drive a modulating water valve.
Through advanced design the 0-10VDC valve can be driven
directly from the VS pump output. The minimum and maximum
level are set in the same way as the VS pump using the AID Tool.
75% and 100% are the default settings respectively.
Loop Pump Slaving
This input and output are provided so that two units can be slaved
together with a common flow center. When either unit has a call
for loop pump, both unit's loop pump relays and variable speed
pumps are energized. The flow center then can simply be wired to
either unit. The output from one unit should be routed to the input
of the other. If daisy chained up to 16 heat pumps can be wired
and slaved together in this fashion.
Advanced Communication Ports
Communication ports P6 and P8 will provide future expansion via
dedicated protocols. These are for future use.
Smart Grid-On Peak (SG) Input
The 'On Peak' input was designed to allow utilities to utilize
simple radio controlled switches to control the On Electric Peak
behavior of the Affinity Geothermal Heat Pump. With a closed
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