Johnson Controls 8000 Humidifier Control & Operating Instructions, Display Panel continued

TABLE 1 – Display Panel (continued)

Indicator	Light	Function
	Solid	Normal Operation.. Humidistat is calling for steam
	Green	and humidifier is operating..
		Humidifier is operating but is not delivering steam
	Solid	at rated capacity.. Occurs if humidifier has operated
		for 168 hours at less than rated capacity due to low
	Yellow	water conductivity.. Light will turn green once water
		conductivity increases and humidifier is delivering
		rated capacity..
		Humidifier is preparing to drain.. (Fill valve is open
		tempering water in canister..) Occurs when humidifier
	Flashing	is turned off, at end of season drain (72 hours with
		no operation) and during forced drain down (168
	Green	hours of operation with no drain activity..)
		Fill and Drain Valves are pulsing to dislodge mineral
		build-up in canister.. Flashes 10 times in four seconds..
		Drain valve is energized and open, draining canister..
	Solid	Valve remains energized for four minutes..
		Indicates end of season shut-down.. Occurs if
	Green
		humidifier does not receive call for humidity in 72
		hours.. Light remains on for 24 hours..
		Canister has reached the end of its life and needs to
	Flashing	be replaced.. Occurs after humidifier has operated for
		at least 168 hours and for an additional 24 hours at a
	Red	current level below 75% of the maximum operating
		current.. Humidifier continues to operate, but at
		reduced capacity..
		Operational problem with humidifier.. Humidifier
	Solid	shuts down.. Occurs when unit detects over-
		current which can be caused by failure to drain
	Red
		or other system failures.. Call your heating and air
		conditioning dealer for service..

HUMIDIFIER CONTROL & OPERATING INSTRUCTIONS

The control provided with your humidifier is mounted either in your return air duct or on a wall in the living space.. The control has a set of contacts which close when the RH is below the set point.. That signal tells the humidifier to energize the electrodes in the canister to generate steam, provided the indoor unit blower is on.. If the blower activation relay is installed, a call for humidity will turn on the indoor unit blower..

It is important to anticipate changes in outdoor temperature and adjust the setting accordingly to avoid excessive condensation when outdoor temperature is low.. For example, with an outdoor temperature of 20°F the correct setting will be 35%.. If the temperature is expected to fall to 0°F that evening, then merely reduce the setting to 25% several hours prior to the temperature change..

See Table 2 for the recommended settings.. These settings, which are based on years of research, represent a compromise between humidity levels that would be most desirable for comfort and humidity levels that are suitable for protection of your home and to avoid condensation on your windows.. For example, a wintertime indoor humidity of 50% may be considered ideal for comfort, but unfortunately, it probably would result in condensation, which can cause damage to your home.. Observing the recommended humidity levels on your Humidifier Control is an important safeguard.. Condensation of water on the inside surface of windows in the form of fogging or frost is usually an indication of too much humidity.. This same condensation can occur in other areas in your home, possibly resulting in damage..

Table 2 – Outdoor Temperature/Indoor Relative Humidity

Outside Temperature	Recommended RH
+40°F	45%
+30°F	40%
+20°F	35%
+10°F	30%
0°F	25%
– 10°F	20%
– 20°F	15%

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