Honeywell TrueSTEAM HM506 Installation Manual page 46

Maintaining the RO Filter
Honeywell recommends the following maintenance steps be performed at least once each
humidification season,
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Remove filters #1, #2, and #3, in this order.
!
Reconnect filters in this order:
• Empty water from the #3 filter and reconnect to the
RO System. (Do not replace.)
• Connect a new #2 filter.
• Connect a new #1 filter.
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44 TrueSTEAM Humidification System 69-2285EF--01