Start-Up Procedure; Maintenance - Aprilaire 850 Installation & Maintenance Instructions Manual

STaRT-UP PRoCeDURe

Once the Model 800 Humidifier and Model 850 Fan Pack are installed, turn on main power to humidifier and open saddle valve . Turn on the
humidifier and turn humidistat set point up . Model 850 fan will turn on . Once canister fills and water boils, steam will flow from the manifold
and the fan will distribute it to the room . Set humidistat to desired RH .
Verify that there are no leaks at steam hose connections .
The Model 850 will operate on a call for humidity and the production of steam by the Model 800 Residential Steam Humidifier . When the call for
humidity is de-activated, the fan will continue to operate for 2 minutes to distribute the remaining steam in the steam hose .

MaInTenanCe

after Replacing the Model 800 Humidifier Canister:
• Ensure fan is operating during a call for humidification.
• Check drain, steam and condensate hoses for kinks, blockages, leaks or cracks. Replace if necessary.
• Ensure steam outlet of the fan pack is not blocked.
8
The front of the Fan Pack will be hot. Steam may not always be visible.
Do not touch the front of the Fan Pack or place hand in front of the manifold.
CaUTIon