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PRE-INSTALLATION
1) CHECK SHIPMENT
A claim should be filed with the transportation company (and reported to Armstrong) if any items
are missing or damaged. Your shipment will arrive in two or three cartons.
One carton holds the humidifier with the steam generator installed, the control humidistat and
sensing element, two short steam hoses, hose clamps, mounting plate and lag screws, and a
clear drain hose. If you have ordered a duct pressure switch or a high limit stat, these too will
be in the humidifier carton.
The steam dispersion tube(s) and fittings are contained in another carton ( two for the EHU 704).
Two complete sets of
installation instructions have
been shipped with your unit.
One is for the installer's use.
The second is for the owner's
files.
2) CHECK LOCAL CODES
Series EHU-700 humidifiers
should be installed in
accordance with ALL
applicable building, plumbing,
and electrical codes.
3) SITE SELECTION
Electronic steam humidifiers
must be installed in locations
that allow routine inspection
and accessibility for maintenance
operations. See Figures 4-1 & 4-2
for access space.
Do not place electronic steam humidifers
in locations where unusual instances of
malfunction of the humidifier or the
system might cause damage to
non-repairable or un-replaceable,
or priceless property.
4
4" Side
Clearanc
e
Both Side
s
5" Min. Drain
Connection Access
2
4" Min. Steam
G
enerator
T
ank Removal
4
" Side
C
learance
24" Front
Clearance
5" Min. Drain
Connection Access
24" Side
Clearance
Figure 4-2. EHU-703/704
Figure 4-1. EHU-701