Make Electrical Connections; Main Power; Control Power; Base Unit Components - Carrier EnergyX 48HC Supplemental Installation Instructions

Make Electrical Connections

See the base unit name plate for the ETL certified
singlepoint electrical values and component electrical
information. See the base unit control box and EnergyX
access doors for the electrical wiring diagrams specific to
each section.
Main Power —
Follow all base unit installation instructions, using
electrical values shown on unit nameplate; only one main
power supply is required The EnergyX base rooftop unit
and energy recovery module is ETL listed as a single
point power supply only.
On some voltage ERV's, there is a step down transformer
that is factory supplied to power components that are not
line side voltage. Field wiring or alteration of these
components is neither required nor desired.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Some electric heat modules require a dual- - point
electrical service connection independent from all
other electrical circuits in the unit. Consult the unit
installation instructions, unit wiring diagrams and/or
electric heater installation instructions for verification.
Control Power —
Follow all base unit installation instructions for low
voltage wiring. The ERV control board is factory wired
into the base unit communications. All external control
wires still connect to the RTU terminal strip as in the base
unit installation instructions.
See Appendix D of this manual for details on connections
for the I/O Flex 6126 controller.

Base Unit Components

Follow the base unit installation instructions to install all
other base unit components, including (but not limited to)
flue hoods, condensate trap and other accessory devices.

START UP

The EnergyX unit is operated in coordination with the
base rooftop unit. Follow the base unit instructions and
Controls book for proper start- - up with addition of the
following:

Start- -Up Check List

Use the EnergyX Start- - Up checklist (see page 59) in
conjunction with the base unit Start- - Up checklist from the
base Controls book. Fill in all blank data entries that are
applicable to the exact unit being installed. The ERV
model and serial numbers are printed in the ERV control
box. Save the checklist for future service and maintenance
use. It is recommended that a copy of the checklist be left
with the unit in the literature slot on the base unit control
box access door.

Base Unit Evaporator Fan

First follow the base unit instructions to balance the RTU
indoor fan. The ERV fans should be off during base unit
fan set- - up. Before start- - up and testing the ERV, verify
that the minimum damper positions are set to 0 and if not
change them to 0.

OPERATING SEQUENCE

General

An EnergyX unit is a 48/50HC rooftop unit and energy
recovery ventilator (ERV). It operates the ERV module in
an integrated manner with the base rooftop unit. The base
rooftop unit functions per the base unit sequence of
operation. The ERV will operate based on communication
from the I/O Flex 6126 controller. The following section
discusses the ERV operation in detail. In summary, the
ERV operates to provide pre- - conditioned outside air for
ventilation requirements.
In general the ERV monitors occupancy and indoor fan
state of the base unit to determine when to activate. The
outside air fan bring in outside air which passes it through
the enthalpy wheel and into the rooftop unit. The building
return air is pulled through the enthalpy wheel by the
exhaust fan and released outside. During operation the
enthalpy wheel is rotating to use the building air to
pre- - condition the outside air.
IMPORTANT: Refer to Appendix D for details on the
I/O Flex controller fo the EnergyX system.
Communication
The ERV relies on communication with I/O Flex 6126 to
operate. The ERV monitors I/O Flex 6126 points to
determine operation. The ERV writes to values in I/O Flex
6126 to provide the user with its running status. If
communication is lost the ERV will shut down and remain
in the Off mode until communication is established. Refer
to the troubleshooting
communication failures. Table 2 shows the I/O Flex 6126
points that the ERV monitors for operation and a brief
description of their functions. Table 3 shows the I/O Flex
6126 points that the ERV uses for its configurations and a
brief description of each. Table 4 shows the I/O Flex 6126
points that the ERV writes to based on its running status.
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section for details on