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FURNACE
BLOWER MOTOR
MODEL 50
CURRENT SENSING RELAY
(IF REQUIRED)
24 VAC FURNACE ACCESSORY
TERMINALS OR TRANSFORMER
(10VA MINIMUM)
SHUT-OFF
(SADDLE VALVE)
WATER SUPPLY
YELLOW 24V
SOLENOID
VALVE WIRES
IMPORTANT
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.
• DO NOT WIRE TRANSFORMER INTO FURNACE BLOWER CIRCUIT.
IMPORTANT
WHEN MODEL 50 CURRENT
SENSING RELAY IS USED:
• WIRE MODEL 50 CURRENT
SENSING RELAY INTO 24 VAC
HUMIDIFIER CONTROL
CIRCUIT ONLY! DO NOT
INSTALL IN TRANSFORMER
PRIMARY CIRCUIT.
CONNECT DRAIN LINE HERE
COMMON
HI
LO
YELLOW WIRES
G
Y
W
C
R
THERMOSTAT
110 VAC
R
C
W
Y
G
FURNACE
OUTDOOR TEMPERATURE
SENSOR FOR
AUTOMATIC MODE
NORTH, EAST
OR WEST SIDE
OF HOME
ABOVE EXPECTED
SNOW LINE
CONTINUOUSLY POWERED
24 VAC TRANSFORMER
PROVIDED WITH HUMIDIFIER
CONNECT TO
HOT WATER SUPPLY
CONNECT DRAIN
LINE HERE
OUTPUTSINPUTSPOWER
G
W
C
RHHODT GfA
ADHC TERMINAL STRIP
B
90-1510
90-1207
Model 600M
MANUAL CONTROL
Model 600
DIGITAL HUMIDIFIER CONTROL
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFO RE STARTING INSTALL ATION
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.
P
roper humidification and humidity control also requires that the home be constructed in accordance with local codes and good building practices.
ATTENTION INSTALLER:
MODEL 600 SERIES HUMIDIFIER
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.
RESEARCH PRODUCTS CORPORATION • P.O. BOX 1467 • MADISON, WI 53701-1467 • CALL 800/334-6011 • FAX 608/257-4357
RETURN
SUPPLY
S
RETURN
R
SUPPLY
S
Horizontal
Upflow
90-1079
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
h
ot water supply line.
SPECIFICATIONS
H
UMIDIFIER DIMENSIONS
Width (
includingsolenoidvalve):
15
3
⁄8”
Height
(includingdrainspud): 15
3
⁄4”
Depth
: 10
1
⁄4”
BYPASS DUCT OPENING
6” diameter
P
LENUM OPENING
10”W x 12
3
⁄4”H
WATER FEED RATE
3 gph
E
LECTRICAL DATA
24 VAC-60 Hz, 0.5 AMP
CAUTION
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 or 600M 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.
R
ISK OF PROPERTY AND EQUIPMENT DAMAGE.
INSTALLATION
OPTIONS
RECOMMENDED WIRING DIAGRAMS
(SEE STEP 7 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)
NOTE
When installing the Aprilaire humidifier with
theAprilaire Digital Humidifier Controlor on a
heat pump system,use hot water.The heated
water supplements thereduced supplyair
temperatureas added heat for evaporation.