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 600 SERIES HUMIDIFIER
WARNING
CAUTION
SPECIFICATIONS
RISK OF PROPERTY AND EQUIPMENT DAMAGE.
1. ELECTRICAL SHOCK HAZARD.
Disconnect electrical power to the
furnace before starting installation.
Failure to do so could result in
HUMIDIFIER DIMENSIONS
Width (including solenoid valve): 153⁄8”
Height (including drain spud): 153⁄4”
Depth: 101⁄4”
1. Do not install humidifier where freezing temperatures
could occur. The water line could freeze and crack
causing water damage to the home.
5. Do not connect Model 600 or 600M transformer
to blower motor wiring. Premature component
failure may result.
serious injury from electrical shock.
2. Do not install humidifier or bypass connection on the
furnace jacket.
6. When installing Humidifier Control on
BYPASS DUCT OPENING
6” diameter
downflow furnace, ensure blower continues to
run after a heat call is satisfied to eliminate
high temperatures from damaging the Control.
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 or bypass connection on a
plenum face where the blanked off ends of the cooling
coil will restrict air movement through the humidifier.
PLENUM OPENING
10”W x 123⁄4”H
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.
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.
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.
WATER FEED RATE
3 gph
8. Do not install humidifier on systems with
greater than 0.4 in. wg pressure differential
between supply and return plenums.
ELECTRICAL DATA
24 VAC-60 Hz, 0.5 AMP
INSTALLATION
OPTIONS
RECOMMENDED WIRING DIAGRAMS
(SEE STEP 7 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)
The Model 600 and 600M 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.
Model 600
DIGITAL HUMIDIFIER CONTROL
ADHC TERMINAL STRIP
POWER
INPUTS
OUTPUTS
Gf
R
C
A
B
ODT
W
G
H
H
NORTH, EAST
OR WEST SIDE
OF HOME
Upflow
OUTDOOR TEMPERATURE
SENSOR FOR
AUTOMATIC MODE
SUPPLY
YELLOW WIRES
R
C
R
ABOVE EXPECTED
SNOW LINE
C
RETURN
G
G
110 VAC
Y
Y
CONNECT DRAIN
LINE HERE
W
CONNECT TO
HOT WATER SUPPLY
W
CONTINUOUSLY POWERED
24 VAC TRANSFORMER
PROVIDED WITH HUMIDIFIER
THERMOSTAT
FURNACE
90-1510
IMPORTANT
Horizontal
USE 120 VAC POWER SOURCE OTHER THAN FURNACE MOTOR
CIRCUIT. HOWEVER, THE TRANSFORMER CAN BE POWERED
OFF THE HOT 120 VAC LINE BEFORE IT ENTERS THE FURNACE.
Model 600M
RETURN
MANUAL CONTROL
• DO NOT WIRE TRANSFORMER INTO FURNACE BLOWER CIRCUIT.
24 VAC FURNACE ACCESSORY
TERMINALS OR TRANSFORMER
(10VA MINIMUM)
SHUT-OFF
(SADDLE VALVE)
SUPPLY
WATER SUPPLY
90-1079
COMMON
MODEL 50
CURRENT SENSING RELAY
(IF REQUIRED)
HI
YELLOW 24V
SOLENOID
LO
VALVE WIRES
NOTE
IMPORTANT
WHEN MODEL 50 CURRENT
SENSING RELAY IS USED:
FURNACE
BLOWER MOTOR
When installing the Aprilaire humidifier with
the Aprilaire Digital 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.
• WIRE MODEL 50 CURRENT
SENSING RELAY INTO 24 VAC
HUMIDIFIER CONTROL
90-1207
CIRCUIT ONLY! DO NOT
INSTALL IN TRANSFORMER
PRIMARY CIRCUIT.
CONNECT DRAIN LINE HERE
RESEARCH PRODUCTS CORPORATION • P.O. BOX 1467 • MADISON, WI 53701-1467 • CALL 800/334-6011 • FAX 608/257-4357
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