SteamOvap IER-04 Series, Инструкция по установке и эксплуатации

Страница: 28 / 44

I N S T A L L A T I O N
28
Installation – step 6
Control installation
General guidelines for control installation
It is a good practice to install the following safety controls:

An air proving switch (APS) in the same duct as the humidifier’s steam ramp so that it
can prevent humidifier from producing steam in case there is no air flow.

A high limit humidistat shall be installed downstream of the steam ramp so that it can
prevent any over humidity (condensing) occurrence. High limit humidistat is usually
provided by an on-off switch its set point should be 85%RH minimum.
High limit humidistat should be placed at least at a distance equivalent to five times the
absorption distance. If the absorption distance is not known, locate it at least 9 feet
(3m) downstream of the steam ramp.
For system that needs very accurate RH% control a RH% sensor can replace or
supplement the On/Off Hi Limit humidistat in this case the IER will not only modulate
the steam production based on the control; signal demand but also on this proportional
Hi-Limit signal.

An enable dry contact can also be wired to switch the humidifier ON or OFF, this enable
contact can be used either as a third safety control or as a way to control the humidifier
ON and OFF, although IER steam humidifier is fully modulating.