HE4XRT
Due to continuing product development, specifications are subject to change without notice.
© 2012 RenewAire LLC
134775_005 HE4XRTMan_Jan12.indd Revised 01/2012 www.renewaire.com
Page 12
Maintenance
SUMMARY MAINTENANCE REQUIREMENTS
Change Filters
Inspect Blower
Tension Blower Belt
General Cleaning and Inspection
Clean Energy Exchange Cores
CHANGING THE FILTERS
Inspect and/or replace filters every two or three months when
the unit is in regular use, or as needed.
• Turn off unit completely! Lock-out and tag-out the unit
disconnect switch.
• Open the Door. The door is secured with turn-type latches,
plus one Phillips-head securing screw. Keep the securing screw.
NOTE: Always replace securing screw when reinstalling door.
• Remove and dispose of all (8) filters. Replace all (8) filters.
NOTE: See chart for information on the initial resistance of the
filters originally supplied with this unit. If replacement filters
have higher resistance, the airflow of the system will be lower.
• Close door; reinstall securing screw.
Blower Inspection
Inspect Blowers every time you change the filters.
• Confirm bearings are still secure to blower shaft. It should
not be possible to move the blower shaft back and forth
along its length.
• Confirm blower wheel is not rubbing against the blower inlet
or housing.
Blower Belt Tension
Check belt tension every time you change the filters.
• Inspect belt(s) for cracking or uneven wear.
•
Check that sheaves are properly aligned so that belt runs straight.
Properly tensioned belt will deflect 0.25” when pressed at the
center point with the following force:
2 HP BLOWER - 3 pounds
3 HP BLOWER - 4 pounds
5 HP BLOWER - 5 pounds
GENERAL CLEANING AND INSPECTION
Perform general cleaning and inspection when changing filters.
• Remove dust from blower wheels periodically.
• Remove paper, leaves, etc. from inlet and outlet screens.
• Inspect for insect nests.
TO CLEAN THE ENERGY EXCHANGE CORE
Clean the core annually.
• Remove the filters.
• Vacuum the exposed faces of the energy exchange core with
a soft brush.
• Vacuum out dust from the rest of the unit case.
• Install new filters.
Initial Resistance of Filters supplied with this unit:
INITIAL PRESSURE DROP: 20" x 20" & 16" X 25" MERV 8 FILTERS
RENEWAIRE PART NUMBERS 103054 & 103057
0
0.1
0.2
400
500
600
700
800
900
1000
CFM/FILTER
PRESSURE DROP THROUGH FILTER ("H
2
O)
"20X20_&_16X25_MERV8_JUNE06.pdf" 6/26/06
Certified data provided by filter manufacturer.
INITIAL PRESSURE DROP 20” x 20” MERV 8 FILTERS
RENEWAIRE SERVICE PART NUMBER 990083
Filter Specifications:
(8) 20” x 20” x 2”(nominal) pleated filters
Actual size: 19.5” x 19.5” x 1.75”
Unit shipped with MERV-8 Filters
Minimum recommended effectiveness: MERV-6
Danger of injury from un-guarded drive belts in unit.
Disconnect power to unit before opening door.
Danger of injury if unit starts unexpectedly. Switch
power off at service disconnect. Lock-out/tag-out the
disconnect.
Filters must be used or the energy exchange core will
become blocked by dust and the unit will not do its job.
In extreme cases components may be damaged.
Incorrect Belt Tension will damage this blower!
DO NOT WASH THE ENERGy EXCHANGE CORE.
Keep it away from water or fire to avoid damaging it.
Always handle the core carefully.
Lubrication
If the motors used in this ERV are equipped with grease fittings,
motors must be lubricated as part of routine maintenance. Use
Exxon Polyrex or equivalent at 2500 operating hour intervals.
