READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
ATTENTION INSTALLER:
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. This product must be installed in compliance with all local, state and federal codes.
AUTOMATIC HUMIDIFIER MODEL 600
WARNING
1. ELECTRICAL SHOCK HAZARD.
Disconnect electrical power to the furnace before starting installation. Failure to do so could result in serious injury from electrical shock.
2. SHARP EDGES HAZARD. Sharp edges may cause serious injury from cuts. Use care when making plenum openings and handling ductwork.
3. RISK OF SCALDING. Water temperature over 125°F can cause severe burns and scald instantly. Shut off the hot water supply before disconnecting or tapping into any hot water supply line.
CAUTION
RISK OF PROPERTY AND EQUIPMENT DAMAGE.
1.Do not install humidifier where freezing temperatures could occur. The water line could freeze and crack causing water damage to the home.
2.Do not install humidifier or bypass connection on the furnace jacket.
3.Do not install humidifier or bypass connection on a plenum face where the blanked off ends of the cooling coil will restrict air movement through the humidifier.
4.Do not set humidity level above recommended or to recommended level if condensation exists on inside windows of any unheated space, as condensation damage may result. Excess humidity can cause moisture accumulation which can allow the possibility for mold growth in the home.
5.Do not connect Model 600 transformer to blower motor wiring. Premature component failure may result.
6.When installing Humidifier Control on downflow furnace, ensure blower continues to run after a heat call is satisfied to eliminate high temperatures from damaging the Control.
7.Do not install humidifier where water pressure exceeds 125 psi, since damage to the humidifier may result. Follow codes in effect concerning pressure reduction.
8.Do not install humidifier on systems with greater than 0.4 in. wg pressure differential between supply and return plenums.
SPECIFICATIONS
HUMIDIFIER DIMENSIONS
Width (including solenoid valve): 153⁄8Ó Height (including drain spud): 153⁄4”
Depth: 101 ⁄4”
BYPASS DUCT OPENING
6” diameter
PLENUM OPENING
9 7⁄8”W x 125⁄8”H
WATER FEED RATE
3 gph
ELECTRICAL DATA
24 VAC-60 Hz, 0.5 AMP
WIRING DIAGRAM
(SEE STEP 8 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)
NOTE
FOR INSTALLATION IN MANUAL MODE,
REPLACE OUTDOOR TEMPERATURE
SENSOR WITH PLASTIC RESISTOR CASE
AND ATTACH MANUAL FACE PLATE.
SEE “HUMIDIFIER CONTROL SAFETY
AND INSTALLATION INSTRUCTIONS”
INCLUDED WITH EACH HUMIDIFIER.
COMMUNICATION |
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ODT |
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24V |
NORTH, EAST |
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TERMINALS FOR 8570 |
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OR WEST SIDE |
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THERMOSTAT |
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OF HOME |
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24 VAC FURNACE ACCESSORY TERMINALS |
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OUTDOOR |
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TEMPERATURE |
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(10 VA MINIMUM) OR |
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SENSOR |
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24 VAC TRANSFORMER (10 VA MINIMUM) |
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IMPORTANT |
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ABOVE EXPECTED |
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SNOW LINE |
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DO NOT WIRE TRANSFORMER |
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INTO FURNACE BLOWER CIRCUIT. |
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SHUT-OFF
(SADDLE VALVE)
WATER SUPPLY
FURNACE
BLOWER MOTOR
YELLOW 24 V
SOLENOID
VALVE WIRES
COMMON
CONNECT DRAIN LINE HERE
90-1110
MODEL 50 CURRENT SENSING RELAY (NOT SUPPLIED) REQUIRED IF 24 VAC POWER SOURCE FOR CONTROL IS POWERED CONTINUOUSLY.
DO NOT INSTALL IN TRANSFORMER PRIMARY CIRCUIT.
INSTALLATION
OPTIONS
The Model 600 Aprilaire can be installed on either the supply or return plenum of a forced air handling system and is easily reversible for installation with right hand or left hand bypass duct connections. The humidifier dimensions and serviceability must be considered when selecting the best location for the humidifier. Here are 2 examples of many types of installations.
Upflow
SUPPLY
RETURN 
Horizontal
RETURN
SUPPLY
90-1079
P.O. BOX 1467 • MADISON, WI 53701-1467 • CALL 800/334-6011 • FAX 608/257-4357
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