HE420A STEAM POWER HUMIDIFIER 68-0192—4 2 ORDERING INFORMATION When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further informati...
Page 3 - INSTALLATION; Select Location and Mount; WARNING; Mount Horizontally Using Mounting Bracket
HE420A STEAM POWER HUMIDIFIER 3 68-0192—4 INSTALLATION IMPORTANT Read all the installation instructions before installing the humidifier. Select Location and Mount There are three typical ways of mounting the steam humidifier: • horizontally under at least a 10 in. (254 mm) wide duct using the mount...
Page 4 - WIRING; CAUTION
HE420A STEAM POWER HUMIDIFIER 68-0192—4 4 1. Position the bracket 1/2 in. (13 mm) from the edge of the duct and trace around the bracket. See Fig. 5. 2. Once the outline has been traced, remove bracket. 3. Drill a 3/8 in. (10 mm) hole within the center portion of the bracket. 4. Use tin snips to cut...
Page 6 - Every 1 to 4 Months
HE420A STEAM POWER HUMIDIFIER 68-0192—4 6 an anticipated 20°F, the control automatically maintains the indoor relative humidity in the safe, comfortable 35% range (see Table 2). OPERATION The HE420A Humidifier uses the principle that hot water creates water vapor. As dry air and vapor mix, the relat...
Page 7 - End of Humidification Season; Vacation; CHECKOUT PROCEDURES
HE420A STEAM POWER HUMIDIFIER 7 68-0192—4 11. Reset the water level. CAUTION Flooding Hazard. Inadequate support of the float arm can lead to valve seat damage resulting in water leakage. Support the float arm during adjustment. a. Set the humidifier reservoir on a level surface. b. Attach the water...
Page 2 - CAUTION; Mount Horizontally Using Mounting
HE420A STEAM POWER HUMIDIFIER 69-1108—2 2 Fig. 3. Mount humidifier horizontally under duct extension using mounting bracket. CAUTION Steam Condensation, Fire and Freezing Water Hazard.Can cause failure of fan or limit control or result in water damage to home. • Do not install the humidifier where t...
Page 3 - Mount Horizontally On Reinforced Duct; Mount Horizontally On Vertical Duct; WIRING; SET THE WATER LEVEL
HE420A STEAM POWER HUMIDIFIER 3 69-1108—2 Mount Horizontally On Reinforced Duct This horizontal mounting method usually requires duct reinforcement to support the weight of the humidifier and keep it level. The mounting bracket is not used. See Fig. 2. 1. Position the bracket to the bottom of the du...
Page 4 - WARNING; SELECT LOCATION AND MOUNT
HE420A STEAM POWER HUMIDIFIER 69-1108—2 4 FINISH MOUNTING AND PLUMBING THE HUMIDIFIER 1. Mount the humidifier as instructed in the Select Location and Mount section. 2. Route the tubing to the humidifier float valve. IMPORTANT Keep the tubing away from sharp edges. 3. Connect the remaining end of th...
Page 5 - Installing the Humidistat to Operate; HUMIDISTAT OPERATING; Automatic Operation; HUMIDISTAT CHECKOUT
HE420A STEAM POWER HUMIDIFIER 5 69-1108—2 Installing the Humidistat to Operate Manually 1. Locate the three-pin arrangement marked AUTO/MAN protruding from the control board (right of wir-ing connections). 2. Pull upward to remove the black, two-pin connector from the auto position. Reinstall it in ...
Page 6 - INSTALL THE SAFETY CONTROL
HE420A STEAM POWER HUMIDIFIER 69-1108—2 6 a. If set up correctly, the humidifier will begin oper- ating. In “Test” mode, the humidistat will operate for approximately one minute. b. If the humidifier does not activate properly in “Test” mode, refer to Appendix A. 4. Set the humidistat. Refer to Humi...
Page 7 - APPENDIX A
HE420A STEAM POWER HUMIDIFIER 7 69-1108—2 APPENDIX A Table 3. Compensating Humidistat Troubleshooting Guide. PROBLEM SOLUTION NOTES Humidifier does not operate in “Test” mode. • Confirm the outdoor temperature sensor is connected to the correct terminals on the humidistat. (For manual operation, ens...