OM 1077-1 • MAVERICK I 4 www.DaikinApplied.com
I
nTroduCTIon
Programmable 24 Volt Thermostat
The Maverick with integral DDC Controller is compatible
with programmable 24 volt thermostats. The programmable
thermostat can supply the time schedule functions when
the DDC controller is not connected to a BAS system.
Connections are made via conventional thermostat connection
screw terminals on terminal T81. Extensive unit status and
diagnostics are displayed on the LCD screen.
Zone sensor with time clock
The Maverick I with integral DDC Controller is compatible with
a zone sensor and mechanical or solid state time clock.
The DDC Controller in each Maverick I 3 to 25 ton Package Air
Conditioner has many design features that optimize operation,
installation and service. Each unit with the DDC Controller has
the following features:
•
Blower ON/OFF Delay.
Adjustable time delay between
blower ON and mode
•
Built-in Control Parameter Defaults.
No programming
required.
•
Compressor Time-OFF Delay.
Adjustable time delay
between compressor shutoff and start up
•
Dirty Filter Switch Input.
The DDC Controller will
signal an increase in static pressure across the air filter,
indicating a dirty filter condition.
•
On Board User Interface Display/Keypad.
Displays
control parameters, diagnostic codes, and sensor
readings. The keypad allows scrolling through display
menu and field configurable changes to be made.
•
Economizer Control.
The economizer is controlled by
the Economizer Logic Module (ELM) that comes with
the economizer. The DDC Controller communicates
with the ELM for control, set point, and diagnostics. The
DDC Controller has several choices for controlling the
economizer. See Economizer Menu Screen. The ELM
monitors the mixed air temperature, return air enthalpy
(optional), minimum position set point (local or remote),
power exhaust set point, CO
2
set point, CO
2
, and
outdoor enthalpy sensor, if selected, to control dampers
to an accuracy of ±5% of stroke. The actuator is spring
returned to the closed position any time that power is lost
to the unit. It is capable of delivering up to 44 inch pounds
of torque and is powered by 24VAC.
•
Unit Diagnostics.
The DDC Controller monitors all
sensors and functions related to unit operation to
provide critical information and maintain diagnostic code
information even if a power failure occurs.
•
Exhaust Fan Control Modes.
Exhaust fans are
controlled by fresh air damper position. Set point is
adjustable through the unit display and keypad.
•
Field Changeable Control Parameters.
Over 50
different control parameters allow customization of the
unit operation by changing delays, cooling stages, dead
bands, and set points.
•
Minimum Compressor Run Time.
Ensures proper oil
return to the compressor.
•
Comfort Alert.
The DDC Controller has two inputs to
monitor optional Copeland Comfort Alerts. The inputs
can provide the following information: Locked rotor, Open
Circuits, Missing Phase, Reverse Phase, and Welded
Contactor.
•
Smoke Alarm Mode.
The input will shutdown the unit
and requires a manual reset. The sensor is used to detect
smoke due to fire in the air conditioning or ventilation
ducts.
•
Lead Lag Compressor Operation.
Stage 1 compressor
operation based on compressor accumulated run time.
•
Staging.
Depending on the unit controls up to 2 stages
of cooling, 2 stages of gas heat, and 2 stages of electric
heat.
•
Active Protection.
Provides active unit protection
when any of the following occurs three times within a
thermostat cycle: low pressure trip, high pressure trip,
gas heat limit trip.
•
Thermostat Bounce Delay.
Protects compressor from
short cycling when mechanical thermostat is used
•
Warm-up Mode Delay.
Adjustable time that the
economizer dampers are kept in the closed position
during morning warm-up input
