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Installation, Operation and Maintenance Manual
Marvel Mini
57
Subject to change without notice.
120.9-IM (1218)
U01
Analog Outputs
ECM Press OFF 0.0v
Air Econo OFF 0.0v
DPC Valve 1 OFF 0.0v
Dig Comp 1 OFF 0.0v
Under the Analog Outputs, OFF means the analog output
will be modulated up or down automatically based on
the demand for the component Setting the OFF to ON
means that the modulation can be increased or decreased
between 00 and 100 vdc based on requirement to test the
component
DIGITAL INPUTS
U01
Dig-Inputs Setup
State Alarm
Duct Hi-Lim cl
op
Fire/Smoke
cl
op
Ext ON/OFF
cl
op
Filter
cl
op
Water Flow
cl
op
The Digital Inputs Setup screen allows devices such as
Ext ON/OFF (Remote ON/OFF), field provided Fire/Smoke
Detectors, etc to be set for the proper switching state Some
devices can be configure to work on contact closure, other
require open contacts The Alarm column may be changed
to Alarm on cl or (contact closure) depending on the field
device installed IMPORTANT: Never change the Alarm
position of the compressor high and low pressure switches
unless it is desired to test the digital input for failure When
doing so, please remember to set the Alarm back to the op
position
ECONOMIZER
U01
Economizer Setup
Type:
>Air& Mod Water Valve
Assist>Enable
Damper Minimum> 000%
Damper Maximum> 100%
U01
Economizer Assist
Delay > 15min
Start > 100%
End > 50%
Comps > 3
(Comps-Total comps
allowed to assist)
The above screens for Economizer Setup and Economizer
Assist allow for setup of the Economizer package The
parameter for Type of Economizer can be set If mechanical
cooling assist is required, Assist can be Enabled so that
Mechanical Cooling Compressors can assist economizer
mode
CAUTION:
Please consult the factory for Assist
requirements as not all units may be capable of having
compressor run while economizer mode is on)
If the Economizer Type is Airside Economizer, the
Minimum output and Maximum outputs can be set for
Economizer Dampers to meet fresh air and maximum air
flow requirements. Economizer Assist requires that the
demand for economizer must be equal to the compressor
Start Demand for the Delay Time before the compressors
can assist The total number of compressors applied
will sequence on with a delay between stages up to the
maximum number of compressors allowed to assist as set
into the Comps-Total compressor allowed to assist setting
The End setting is the Economizer Demand value set point
where compressors will stop assisting and only Economizer
mode will operate