NorAire NC-FE series, Installation & Operating Instructions Manual

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05/16/2014 27 NI216
Start Up, Power On
Installation check points:
1. Verify hydronic piping/chilled water system has been properly filled and purged – see Water Fill/Purge
Procedure section.
2. Recheck electrical sections within this installation manual – Electrical Data, Electrical Hookup, and
Additional Hookup or Special Equipment Concerns.
3. Verify all electric connections are proper per NEC or CSA code and tight or properly torqued.
4. Re-familiarize yourself with Operator Indicators and Control Sequence Information sections.
5. In order to complete all the service/alarm checks, more than 6 minutes continuous run time is required.
Use of software CD and accompanying USB cable – as an accessory tool (or supplied at specific contractor
training seminars) this can provide valuable monitoring and diagnostic information plus has the ability to change
factory defaults. You must use the USB cable provided with the CD. It plugs into J5 on the left side of the
control board, next to J2 wire harness. Carefully notice the cable female end has a dummy or plug socket and
the board pin connector has a missing pin. This becomes the keying pin. Since this is used for setup or
troubleshooting only, it is a very simple connector component, thus special care by the service technician needs
to be exercised in its use and carefully plugging in and out. The software CD has a HELPS file which explains
all of the required keyboard functions, communication ports, and the screen functions or terminology. This is
not repeated in this manual. However, the following functions are noteworthy and emphasize the added feature
the NorAire system has when using this tool.
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Temperature sensor monitor – a pull-down screen (Alt-M) provides a real time monitor of the four
temperature sensors.
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Main screen temperature sensor offset – a plus or minus value can be downloaded which alters the
temperature value used by the internal software sequences. This is much easier than putting sensors in a
bucket of ice, etc. to “cool” the sensor or its reported value. In this case the offset in essence causes the
sensor to “report” a different value. As an example, changing the OT temp allows a simulation of any
of the sequences outlined in the control sequence section.
WARNING
ONCE AN OFFSET IS WRITTEN INTO THE CONTROLLER MEMORY, THIS IS A PERMANENT
CHANGE. BEFORE UNPLUGGING THE CABLE, IT IS THE USER’S RESPONSIBILITY TO
ZERO OUT ANY OFFSETS OR ANY TEMPORARY DEFAULT CHANGES. ALSO, THE
COMPLETE SCREEN IS REWRITTEN IN MEMORY FROM A SINGLE “WRITE”
COMMUNICATION FUNCTION. THE READ BACK WILL SHOW THE USER EXACTLY WHAT
IS NOW IN PERMANENT NON-VOLATILE MEMORY.
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SERVICE or ALARM history – with Alt-A the display will show history of the past five limit
conditions, bottom of the list is the most recent.
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Factory defaults – this is the lower two thirds of the main screen. Again, the HELPS file can assist in
rechecking the meaning of each value. The last two can definitely relate to the specific installation. The
stage *OT disable temperature does not allow the specific boiler stage to come on above the temperature
value. This is noteworthy when starting up or troubleshooting.
GPM Water Flow Calculator
1. Clamp-on amp meter – at the NorAire unit CB’s (with boiler on)
2. Voltage measurement at the NorAire CB’s
3. Active heat call (stat-W IN)
4. The heating water OUT pipe or buffer tank must be < 105° F (41° C). Adjust load or valve accordingly
(PC screen will error if this is not the case).
5. This is initiated at the communication selection pull-down.
ODU pressures and R-410A charge verification – use installation manual supplied with the ODU for its
required installation and troubleshooting checks. Since this is a field installed refrigerant line set product, as a
minimum a gauge set needs to be connected and superheat/sub-cool needs to be verified per the ODU
manufacturer’s installation manual or pressure/temperature decal.