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.
CAUTION
RISK OF PROPERTY AND EQUIPMENT DAMAGE.
SPECIFICATIONS
HUMIDIFIER DIMENSIONS
1. Do not install humidifier where freezing temperatures
5. Do not connect the Model 700 or 700M power cord to multi-
speed furnace blower motors or blower motors other than 120
VAC. Premature component failure may result. Use Research
Products Corporation Model 50 Current Sensing Relay.
6. When installing Humidifier Control on a 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 the supply plenum where static
pressure exceeds 0.4 in. wg.
Width 1529⁄32”
Height (including solenoid valve
and drain spud) 18”
could occur. The water line could freeze and crack
causing water damage to the home.
2. Do not install humidifier on the furnace jacket.
Depth 1011⁄32”
2. SHARP EDGES HAZARD. Sharp
edges may cause serious injury from cuts.
Use care when making plenum openings
and handling ductwork.
3. Do not install humidifier 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.
PLENUM OPENING
143⁄4”W x 145⁄16”H
WATER FEED RATE
6 gph
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.
ELECTRICAL DATA
120 VAC-60 Hz, 0.8 AMP
RECOMMENDED WIRING DIAGRAMS
INSTALLATION OPTIONS
(SEE STEP 6 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)
Typical Installation
Alternate Installation
Model 700
DIGITAL HUMIDIFIER
HOT WATER
RETURN
RETURN
CONTROL
SUPPLY
SUPPLY
ADHC TERMINAL STRIP
POWER
INPUTS
OUTPUTS
Gf
R
C
A
B
ODT
W
G
H
H
NORTH, EAST
OR WEST SIDE
OF HOME
OUTDOOR
TEMPERATURE
SENSOR FOR
120 VAC OUTLET
CONNECT DRAIN LINE HERE
AUTOMATIC MODE
CONNECT TO HOT WATER SUPPLY
R
C
R
C
ABOVE EXPECTED
SNOW LINE
G
G
90-921
BROWN WIRES
Y
Y
110 VAC
W
90-1514
W
THERMOSTAT
FURNACE
CONTINUOUSLY POWERED 24 VAC
TRANSFORMER PROVIDED WITH HUMIDIFIER
Orientation of Aprilaire Model 700
and 700M to Cooling Coils
NOTES
IMPORTANT
1. Models 700 and 700M
are not suitable for
installation on ducts
with horizontal airflow.
Performance will be
reduced.
USE 120 VAC POWER SOURCE OTHER THAN FURNACE MOTOR
Model 700M
CIRCUIT. HOWEVER, THE TRANSFORMER CAN BE POWERED OFF
THE HOT 120 VAC LINE BEFORE IT ENTERS THE FURNACE.
MANUAL CONTROL
BLANKED OFF
END OF COIL
• DO NOT WIRE TRANSFORMER INTO FURNACE BLOWER CIRCUIT.
24 VAC FURNACE ACCESSORY
TERMINALS OR TRANSFORMER
(10VA MINIMUM)
SHUT-OFF
(SADDLE VALVE)
2. When installing the
Aprilaire humidifier with
the Aprilaire Digital
WATER SUPPLY
Humidifier Control or on
a heat pump system, use
hot water. The heated
water supplements the
reduced supply air
temperature as added
heat for evaporation.
COMMON
COOLING COILS IN
WARM AIR PLENUM
MODEL 50
CURRENT SENSING RELAY
(IF REQUIRED)
HI
Aprilaire to
LO
be installed
as shown in
relation to
IMPORTANT
WHEN MODEL 50 CURRENT SENSING RELAY IS USED:
FURNACE
BLOWER MOTOR
• WIRE MODEL 50 CURRENT SENSING RELAY
INTO 24 VAC HUMIDIFIER CONTROL CIRCUIT
ONLY! DO NOT INSTALL IN TRANSFORMER
PRIMARY CIRCUIT.
cooling coils.
120 VAC
OUTLET
90-922
90-1208
CONNECT DRAIN LINE HERE
BROWN WIRES
RESEARCH PRODUCTS CORPORATION • P.O. BOX 1467 • MADISON, WI 53701-1467 • CALL 800/334-6011 • FAX 608/257-4357
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