Reznor XAWU Unit Installation Manual - Manual

INSTALLATION INSTRUCTIONS
EN ERGY RE COV ERY VEN TI LA TOR Ap plies to Model XAWU
INSTALLATION INSTRUCTIONS FOR INDOOR STAND ALONE
ENERGY RECOVERY UNIT IN OVER/UNDER DESIGN
FORM RZ-NA-I-XAWU
MAY 29, 2014
SUPERCEDES 09-27-13
NXX-2XERV
PAGE 1
I - Ship ping And Pack ing List
Package contains:
1 - Energy Recovery Ventilator Assembly
II - Ship ping Dam age
Check unit for shipping damage. Receiving party should
contact last carrier immediately if shipping damage is
found.
III - Gen eral
These instructions are intended as a general guide and do
not supersede local codes in any way. Authorities having
jurisdiction should be consulted before installation.
IV - Re quire ments
When installed, the unit must be electrically wired and
grounded in accordance with local codes or, in absence of
local codes, with the current National Electric Code,
ANSI/NFPA No. 70.
V - Ap pli ca tion
These Energy Recovery Ventilators (ERV) are used in a
down discharge manner equipped with field provided
balancing damper assembly through the roof. A roof
curb must be provided to Rooftop Systems specifications.
These wheels conserve energy by mixing warmer air with
cooler air in the following manner:
Re cov ery Wheel Mode
The Recovery Wheel mode is accomplished by two
blowers providing continuous exhaust of stale indoor air
and replacement by equal amount of outdoor air. Energy
recovery is achieved by slowly rotating the energy
recovery wheel within the cassette frame work. In winter,
the ERV adsorbs heat and moisture from the exhaust air
stream during one half of a complete rotation and gives
them back to the cold,drier intake air supply during the
other half rotation. In summer, the process is automatically
reversed. Heat and moisture are absorbed from incoming
fresh air supply and transferred to the exhaust air stream.
This process allows outdoor air ventilation rates to be
increased by factors of three or more without additional
energy penalty or increase in size of heating or air
conditioning systems.
VI - Rig ging Unit For Lift ing
1- Maximum weight of unit is — Varies per Series
{300-1200 Lbs.} (Crated)
2- Remove crating.
3- All panels must be in place for rigging.
VII - In stal la tion
1. Verify ERV is positioned and properly secured.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
e l e c t r i c a l p o w e r t o u n i t O F F a t
disconnect switch(es). Unit may have
multiple power supplies.
2. Attach duct work to duct flanges on roof curb.
3. Remove ERV control access panel to connect field
wiring.
4. Route class II low voltage wire (3 conductor) from
thermostat or energy management through small
bushing in end panel of ERV. See wiring diagram.
a. Thermostat (dependent) - connect in parallel at
rooftop unit with "G", "C" and "W". Then connect
matching color at terminal 1, 2, and 3 respectively
on ERV circuit board.
b. Energy Management - provide +24 VAC to "1" and
common, 24 VAC to "2" terminals on ERV circuit
board.
c. Thermostat (dedicated) - splice into +24 vac (blue
wire) at (control circuit board) transformer
connection run wire to "R" terminal. Then run
another wire from "G" terminal to ERV (control
circuit board) terminal block #1.
5. All electrical connections must conform to any local
codes and current National Electric Codes (NEC) and
Canadian Electric Codes (CEC). Refer closely to unit
wiring diagram in unit and/or in these instructions for
proper wiring connections.
Energy recovery COMPONENT certified
to the AHRI Air-to-Air Energy Recovery
Ventilation Equipment Certification
Program in accordance w ith AHRI
Standard 1060-2000. Actual performance
in packaged equipment may vary.
ETL Certified per UL 1995
and CSA 22.2