LE6XRT ERV
31
1.800.627.4499
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
RENEWAIRE.COM
MAINTENANCE
9.3 ADJUST MOTOR SHEAVES
Many units are equipped with adjustable sheaves on the fan motors. Any motor that is not controlled
by a VFD will have an adjustable sheave. All adjustable sheaves are pre-set at the factory to turn the
fans at a slower speed in order to reduce the possibility of over-amping at start-up . The sheaves have
been turned out 2 full turns and they must be re-set after start-up to achieve the desired fan speed.
Changes to a building’s air handling system or even changes in the Occupied Space may demand a
change in fan speed. Using the pressure test ports on the cabinet doors, check the pressure drop
across the core in the OA/FA and RA/EA airstreams and determine if the motor sheaves need to be
readjusted. When checking the core pressure drop, make sure that clean filters are in place.
See Sec-
tions 11.7 and 11.8
for more detailed adjustment information.
10.4 FILTERS
10.3 MAINTENANCE SCHEDULE
10.1 MAINTENANCE 24 HRS. AFTER START-UP
10.2 MAINTENANCE 30 DAYS AFTER START-UP
10.0 MAINTENANCE
RenewAire ERVs are built to operate with minimal maintenance. After unit commissioning, the prima-
ry areas of attention are the air filters and periodic lubrication of the fan motors and fan bearings.
24 hours after unit start-up:
• Readjust the tension on the motor drive belts.
• In new installations, check the air filters since they will often collect dust, dirt and debris at time
of start-up.
After 30 days of operation:
• Tighten all electrical connections, paying special attention to VFD wiring (if present).
• Readjust the tension on motor drive belts.
• Check the air filters as part of the normal monthly maintenance.
Experience on the part of the service person is the most important issue in establishing a maintenance
schedule. There will be times of the year when frequent inspection of the filters will be required, such
as spring and summer when there may be pollen, dust, dirt or debris from budding trees and bushes
that can clog the filters. Also
see Section 11.9 Maintenance Records
in this manual.
Filter cleanliness and replacement is the most important and frequent maintenance issue. Dirty filters
will cause an immediate reduction in operating efficiency of the ERV. Normally, filters should be in-
spected and changed when they are dirty. Paper filters are not to be cleaned, they are to be replaced.
In general, if a filter looks dirty, replace it. The best indication of dirty filters is to check the pressure
drop across the filter banks with an optional filter monitor. If it is not possible to check the pressure
drop, the rule of thumb would be to change the filters every two months.
Clean Filter Pressure Drop Table (in. w.g.)
LE6X Airflow (CFM)
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
2" MERV 8
0.03
0.05
0.06
0.07
0.09
0.10
0.11
0.13
0.14
0.16
0.17
2" MERV 13
0.04
0.05
0.07
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0.22
4" MERV 8
0.01
0.01
0.02
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
4" MERV 13
0.03
0.04
0.06
0.07
0.08
0.10
0.12
0.13
0.15
0.17
0.19
NOTE: Pressure drop of clean 2" MERV 8 filters is included in the Unit Performance Ratings Table
Table: Clean Filter Pressure Drop (in. w.g.)
