American Standard 200A, 500A, 300A owner manual II. Operating Instructions, Operation Guide

II. OPERATING INSTRUCTIONS

Models HUMD300A and HUMD500A with Automatic Humidifier Control: (Manual Humidifier Control-see pg 4)

Your Automatic Humidifier Control is installed in the cold air return. During the first heating season, your Automatic Humidifier Control needs to be set initially to match your home’s condition. Please follow these steps when adjusting your control (refer to Figure A).

1.Turn the dial setting knob to “5,” which is within the normal range. During the next 24-48 hours it may be necessary to adjust the dial for more or less humidity, depending on your personal comfort and home’s requirements. Refer to the “Operation Guide” (Table 1).

2.During the coldest portion of the first heating season, minor adjustments may be necessary. This is dependent upon your individual home construction, refer to the “Operation Guide” (Table 1).

TABLE 1 – Operation Guide

Condition	Solution
Condensation on windows	Reduce the setting on the control dial
	by 1 increment.
Lack of humidity	Increase the setting on the control dial
	by 1 increment.
Humidifier does not operate	Turn dial to “Test.” Make certain furnace
	and blower are operating. If unit still
	doesn’t operate, consult your air
	conditioning and heating dealer.
Humidifier won’t shut off	Turn dial to “Off.” If unit continues to
	operate, consult your air conditioning
	and heating dealer.
Test mode	System operation is checked by setting the
	knob to “Test.” Make certain furnace and
	blower are operating. Humidifier will
	operate for one minute.

The relative humidity in your home will now be accurately controlled to meet your needs and should not need further adjustment during future heating seasons. Make note of the dial setting in the event you temporarily move the knob when performing annual maintenance of the Humidifier.

FIGURE A

					7
			A	L	6
		M
O	R		5
N
		4

3
2	1

T e

s t

Off

Humidity Level

- 3 -