Nu-Air Ventilation Systems Inc. - HRV Operating & Installation Manual
Rev. 3.4 Sept. 20, 2011 - 23 -
10.12. Defrost, Recirculation and Furnace Interlock Settings
Defrost and recirculation modes are set according to model and, in some cases, by preferences. All
models leaving the factory have their jumpers pre-set. Depending on local Codes, you may choose to
interlock whenever the HRV/ERV is operating at any speed, or just high speed. NOTE: NBC/OBC
require interlock at all speeds.
DO NOT ALTER FACTORY SET JUMPERS IN BLOCK 1
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