36
STEAM INJECTION INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Maxi-bank option field assembly and installation
The Maxi-bank humidifier’s header piping and steam-jacket
piping are provided by DriSteem. The Maxi-bank is factory
assembled and shipped intact, except for larger units that
are broken down for shipment. If the unit you are installing is
already assembled, skip installation steps that do not apply.
1. Unpack shipment and verify receipt of all Maxi-bank
components with packing list. Report any shortages at
once.
2. To simplify installation, we recommend that dispersion
tubes be attached to the Maxi-bank header before
dispersion tubes and header are installed in a duct or air
handler.
3. Follow the pre-tagged component lettering and match up
dispersion tubes (or tube sections) to their proper location
on the Maxi-bank header.
4. Install each dispersion tube into its appropriate tube
adapter on the header, being sure to lubricate O-rings in
the tube adapters.
5. Proceed with the additional tubes. Bring the jacketed
union halves together and secure unions by hand.
NOTE:
When the total tube length of dispersion tubes
exceeds 45' (13.7 m), we recommend installing an
additional steam inlet to the dispersion tubes and an
additional steam jacket trap. One for each additional 45'
of total tube length. Divide the tubes into equal groups.
See Figures 41-1 and 43-1.
6. When all the dispersion tubes are assembled, place
the tube assembly into the duct or air handler, securing
the assembly and tube ends to the duct or a fabricated
structure. Install tubes level.
7. Position and secure header, then tighten interconnecting
tube jacket unions. When installing into a duct, use the
two-piece escutcheon plates around each tube and secure
to duct with sheet metal screws. In duct applications
where air tightness is required, seal around tube and
bolts with suitable caulk.
MAXI-BANK HUMIDIFIER
For more installation information
• See “Humidifier placement” on Pages
6 – 8 for information about choosing
an installation location.
• See “Sensor placement” on Page 9.
• See “Pressurized steam piping guidelines” on
• See “Temperature switches” on Pages
WARNING
Excessive moisture hazard
DriSteem strongly recommends installing
a duct airflow proving switch and a
duct high limit humidistat. These devices
prevent a humidifier from making steam
when there is low airflow in the duct or
when the RH level in the duct is too high.
Failure to install these devices can result
in excessive moisture in the duct, which
can cause bacteria and mold growth or
dripping through the duct.
WARNING
Improper mounting hazard
Mount humidifier per the instructions in this
manual and to a structurally stable surface.
Improper humidifier mounting can cause
the humidifier to fall resulting in severe
personal injury or death.
