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Automatic Steam Humidifier Control
Safety, Installation, and Operation Manual
READ COMPLETE INSTALLATION INSTRUCTIONS BEFORE STARTING.
WARNING
This product must be installed by a qualified heating and air conditioning contractor. Failure to do so
could result in serious injury from electrical shock or damage to product and voids product warranty due
to possible product misapplication.
THESE INSTALLATION INSTRUCTIONS ARE FOR THE AUTOMATIC STEAM HUMIDIFIER CONTROL ONLY!
®
For Aprilaire Humidifier
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INSTALLATION FIGURE 1 – Modulating Control Output CAUTION Improper jumper settings may damage humidifier. PROPORTIONAL CONTROL BAND The shunt on the JP2 header pin must be set in accordance with the Note: 10 VDC instructions in this manual. The Proportional Control Band can be adjusted to 6%, 9%, 12%, STEP 1: VERIFY CONTROL TYPE or 15% RH. The 5 VDC factory setting When shipped with a Steam Humidifier, the Automatic Steam Humidifier of 12% is Control is preset at the factory to match the h
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STEP 2: DETERMINE LOCATION FOR CONTROL STEP 3: DETERMINE LOCATION FOR OUTDOOR AND MOUNT ON DUCT TEMPERATURE SENSOR The Control must be mounted in the return duct of the HVAC system. The location of the Outdoor Temperature Sensor must meet these three See Figure 4 for a split-system installation and Figure 5 for a rooftop unit requirements: installation. The Control must be at least 1 foot upstream of the steam 1. Must be mounted on North, East or West side of building out of dispersion tube and
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STEP 8: WIRE THE CONTROL TO THE HUMIDIFIER FIGURE 7 – Alternate Location for Outdoor Temperature Sensor Wire the Control to the field wiring terminal block of the Steam Humidifier according to Figure 9. Use 3-wire shielded cable with ground for the wiring from the Control to the Humidifier. Note the terminal designations below. AUTOMATIC STEAM HUMIDIFIER CONTROL: FRESH AIR INTAKE I+, I- Serial Communications (for optional devices) 24V +24 VDC input power CENTER C Common LINE H+ Command Signal t
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T / E T S S E E T R 6. If all is set up properly, the ‘Steam’ indicator light on the humidifier will AUTOMATIC MODE OPERATION NOTES illuminate and the heaters will be energized. In the ‘Test’ position, the humidity demand will last for one minute. The Automatic Steam 7. If the ‘Steam’ indicator light does not illuminate when the Control is Humidifier Control is installed turned to the ‘Test’ position, refer to the troubleshooting section of FIGURE 12 in the return duct. During the this manual. f
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T 2 / 0 E T ° 5 F S S E % E T R % 1 5 The recommended settings on the humidistat are based on years of research MANUAL MODE OPERATION NOTES for an average building. (See ASHRAE Handbook – HVAC Systems and Equipment, Ch. 20 – Humidifiers.) Note: these settings may not be appropriate The Automatic Steam Humidifier Control is installed in the return duct. for every application. These settings represent a compromise between RH levels When installed in the Manual Mode, the Control provides specific s
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SYMPTOM TROUBLESHOOTING PROCEDURE Humidifier operates • If the humidity level in the building is less than the knob setting or is within the proportional control band (Model 1160 and constantly 1180 only), the Automatic Steam Humidifier Control will operate the humidifier until the humidity level is higher than the knob setting. • In the “Test” mode, verify unit will operate for approximately one minute. • Check the resistance of the sensor by removing the wires of the Outdoor Temperature Senso
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LIMITED WARRANTY Your Research Products Corporation Aprilaire Automatic Steam Humidifier Control is expressly warranted for two (2) years from the date of installation to be free from defects. Research Products Corporation’s exclusive obligation under this warranty shall be to supply, without charge, a replacement for any part of the Automatic Steam Humidifier Control, which is found to be defective within a two (2) year period and which is returned no later than thirty (30) days after the two (
