Nortek PREEVA NEOS, Installation And Servicing Manual, Page: 22 / 52

Page No 22 of 52 Reznor, PREEVA Neos, Installation Manual, EN 2021-05, D301315 Iss 1
C
Commissioning and operation
PREEVA Neos units must be
commissioned before putting into
service.
Outdoor commissioning work on
PRN-E appliances should not be
undertaken during wet conditions. A
second person must be available to
provide assistance in the event of an
emergency.
Pre-start checks
Prior to starting up the unit, carry out the
following checks:-
• Do not use this appliance if any part has
been subjected to water ingress. Immediately
call a qualified service technician to inspect
the appliance and to replace any part of the
control system and any gas control.
• Check suspension (indoor unit) or unit
support (outdoor unit). The unit must be
secure.
• Verify that no other parts are fitted which
are not individually supported and secured.
• Check gas pipework for leaks and correct
gas line pressure.
• Bleed gas lines of trapped air.
• Check electrical wiring and ensure that
wiring conforms to the wiring diagram. Be
sure that all cables are correctly sized to
meet the requirements of the units.
• Ensure the correct phases in the supply cable
are connected to the correct terminals at the
unit.
• Check polarity. Verify that line voltage exists
between each live terminal (L1, L2 and L3)
and earth ground.
• Verify that the appliance is earthed by
conducting an earth continuity test.
• Ensure that fuses are of the correct rating
and fuse value.
• Check ignition controller program key
matches the resistance value as shown in
Combustion data table for the heater model.
• Ensure condensate drain U trap is full of
water and the condensate drain pipe is
watertight.
• Ensure that the air discharge louvres are
open (if fitted).
• Commission air supply dampers (if fitted).
• Check to ensure that the fan performance
and motor load factors are correct for the
application and in accordance with the
application data plate.
• Press LC3 thermostat reset button to ensure
it is not in lockout.
Supplementary checks for an indoor unit
installation:
• Check that no combustibles are near to the
unit. Requirements are in the location and
installation section of this manual.
• Check vent system to be sure that it is
installed according to the combustion air
supply instructions given in the installation
section of this manual.
Start up
For your safety, follow the
instructions exactly otherwise
damage or injury could occur!
During start up all gas services (up
to the gas meter) must be checked
again for gas soundness to ensure
no leaks are present.
Fill the condensation drain pipe U
trap with water (through the flue
outlet of the unit) until water runs
out of the condensate drain.
The condensation drain pipe and
trap must be visually tested for
water tightness.