READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION
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.
Proper humidification and humidity control also requires that the home be constructed in accordance with local codes and good building practices.
MODEL 700 SERIES HUMIDIFIER
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. Sharpedges may cause serious injury from cuts. Use care when making plenum openings and handling ductwork.
3.RISK OF SCALDING. Watertemperature 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 | ||
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| RISK OF PROPERTY AND EQUIPMENT DAMAGE. | ||
1. Do not install humidifier where freezing temperatures | 5. Do not connect the Model 700 or 700M power cord to multi- | |
could occur. The water line could freeze and crack | speed furnace blower motors or blower motors other than 120 | |
causing water damage to the home. | VAC. Premature component failure may result. Use Research | |
2. Do not install humidifier on the furnace jacket. | Products Corporation Model 50 Current Sensing Relay. | |
6. When installing Humidifier Control on a downflow furnace, | ||
3. Do not install humidifier on a plenum face where the | ||
ensure blower continues to run after a heat call is satisfied to | ||
blanked off ends of the cooling coil will restrict air | ||
eliminate high temperatures from damaging the Control. | ||
movement through the humidifier. | ||
7. Do not install humidifier where water pressure exceeds | ||
4. Do not set humidity level above recommended or to | ||
125 psi, since damage to the humidifier may result. Follow | ||
recommended level if condensation exists on inside | ||
codes in effect concerning pressure reduction. | ||
windows of any unheated space, as condensation | ||
damage may result. Excess humidity can cause | 8. Do not install humidifier on the supply plenum where static | |
moisture accumulation which can allow the possibility | pressure exceeds 0.4 in. wg. | |
for mold growth in the home. |
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SPECIFICATIONS
HUMIDIFIER DIMENSIONS
Width 15 29⁄32”
Height (including solenoid valve
and drain spud) 18”
Depth 1011⁄32”
PLENUM OPENING
143⁄4”W x 145⁄16”H
WATER FEED RATE
6 gph
ELECTRICAL DATA
120
RECOMMENDED WIRING DIAGRAMS
(SEE STEP 6 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)
Model 700
DIGITAL HUMIDIFIER CONTROL
R C A B | ODT W/G Cf | H |
INSTALLATION OPTIONS
| Typical Installation | Alternate Installation | ||||||||||
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| RETURN |
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| RETURN |
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| SUPPLY |
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| SUPPLY | |
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NORTH, EAST |
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OR WEST SIDE | CONTINUOUSLY POWERED | |
OF HOME | ||
24 VAC TRANSFORMER | ||
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| PROVIDED WITH HUMIDIFIER | |
| IMPORTANT | |
OUTDOOR TEMPERATURE | DO NOT WIRE TRANSFORMER | |
INTO FURNACE BLOWER CIRCUIT. | ||
SENSOR OR MANUAL | ||
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MODE RESISTOR |
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| 24 VAC FURNACE ACCESSORY TERMINAL | |
| COMMON | |
ABOVE EXPECTED | CONSULT FURNACE MANUFACTURER FOR VOLTAGE AND | |
SNOW LINE | ||
| OPERATION PARAMETERS OF ACCESSORY TERMINALS. | |
| TERMINALS MAY BE LABELED: “HUM”, “ACC” OR “EAC” | |
| NOTE: IF 120V, INSTALL 24V TRANSFORMER. | |
| NOTE: SEE CONTROL INSTRUCTIONS FOR OTHER WIRING OPTIONS. |
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(SADDLE VALVE) |
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WATER SUPPLY |
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120 VAC OUTLET |
CONNECT DRAIN LINE HERE | BROWN WIRES |
Model 700M
IMPORTANT
USE 120 VAC POWER SOURCE OTHER THAN FURNACE MOTOR CIRCUIT. HOWEVER, THE TRANSFORMER CAN BE POWERED OFF
NOTES
MANUAL CONTROL
THE HOT 120 VAC LINE BEFORE IT ENTERS THE FURNACE.
• DO NOT WIRE TRANSFORMER INTO FURNACE BLOWER CIRCUIT.
24 VAC FURNACE ACCESSORY |
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TERMINALS OR TRANSFORMER |
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(10VA MINIMUM) |
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| WATER SUPPLY |
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COMMON 
MODEL 50
HICURRENT SENSING RELAY
Aprilaire to
BLANKED OFF
END OF COIL
COOLING COILS IN
WARM AIR PLENUM
1. Models 700 and 700M |
are not suitable for |
installation on ducts |
with horizontal airflow. |
Performance will be |
reduced. |
2. When installing Aprilaire |
humidifier on a heat |
pump system, use hot |
water. The heated |
water supplements the |
reduced supply air |
LO
(IF REQUIRED)
be installed
temperature as added |
| IMPORTANT |
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FURNACE | WHEN MODEL 50 CURRENT SENSING RELAY IS USED: |
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• WIRE MODEL 50 CURRENT SENSING RELAY |
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BLOWER MOTOR | 120 VAC |
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| INTO 24 VAC HUMIDIFIER CONTROL CIRCUIT | OUTLET | |
| ONLY! DO NOT INSTALL IN TRANSFORMER |
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| PRIMARY CIRCUIT. | CONNECT DRAIN LINE HERE | BROWN WIRES |
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as shown in relation to cooling coils.
heat for evaporation. |
RESEARCH PRODUCTS CORPORATION • P.O. BOX 1467 • MADISON, WI
