Aprilaire 400 Instructions And Installation Instructions

READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING
Attention Installer: WARNING
shock. This product must be installed in compliance with all local, state and
The Model 400 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 pipe connections. Read complete instructions before mounting the humidifier.
15
The unit is " x
WARNING
1. Disconnect electrical power to the furnace before starting
installation. Failure to do so could result in serious injury from
electrical shock.
2. Sharp edges may cause serious injury from cuts. Use care when
making plenum openings and handling ductwork.
3. Hot water temperatures in excess of 125°F. may cause serious
injury from burns. Make sure water supply is shut off before
connecting the water supply.
CAUTION
1. Do not install unit where freezing temperatures could occur.
2. Do not install unit or bypass connection on the furnace jacket.
3. Do not install unit or bypass connection on a plenum face where
the blanked off ends of the cooling coil restrict air movement
through the humidifier.
COMMUNICATION
TERMINALS
FURANCE ACCESSORY
TERMINALS
(10 VA MINIMUM)
OR
TRANSFORMER
(10 VA MINIMUM)
24 VAC
FURNACE
BLOWER
HIGH MODEL
LOW
COMMON
IMPORTANT
WHEN MODEL 50 IS USED:
• DO NOT WIRE TRANSFORMER INTO
FURNACE BLOWER CIRCUIT.
• WIRE MODEL 50 INTO "APRILAIRE
HUMIDIFIER" CIRCUIT ONLY! DO NOT
INSTALL IN TRANSFORMER CIRCUIT.
AUTOMATIC HUMIDIFIER MODEL 400
14 3 10
/ " x ". The dimensions and serviceability must be considered when selecting the best location for the unit.
8
3
NOTE: SIX (6) #8 X / " PLATED HEX HEAD SMS SCREWS (NOT FURNISHED) ARE REQUIRED FOR INSTALLATION.
4
SHUT-OFF
50
(SADDLE VALVE)
WATER SUPPLY
CONNECT SAFETY
OVERFLOW LINE HERE
P.O. BOX 1467 • MADISON, WI 53701-1467 • Call 608/257-8801 • FAX 608/257-4357 • Products For Better Indoor Air Quality
This product must be installed by a qualified heating and air conditioning
contractor. Failure to do so, could result in serious injury from electrical
federal codes.
4. Do not set humidity higher than recommended. Condensation
damage may result.
5. Do not connect the transformer of the Model 400 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. Do not set humidity up to recommended levels if there is
condensation on the inside windows of any unheated living
space. Condensation damage may result.
7. 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 Humidifier Control.
8. Do not install humidifier where water pressure exceeds 125 psi,
since damage to the unit may result. Follow codes in effect
concerning pressure reduction.
NORTH, EAST
OR WEST
SIDE OF
HOME
NOTE
OUTDOOR
FOR INSTALLATION IN MANUAL
TEMPERATURE
MODE, REPLACE OUTDOOR
SENSOR
TEMPERATURE SENSOR WITH
PLASTIC RESISTOR CASE AND
ATTACH MANUAL FACE PLATE.
SEE FORM #DP10005402 FOR
COMPLETE WIRING INSTRUC-
TIONS, INCLUDED WITH EACH
HUMIDIFIER.
ABOVE EXPECTED
SNOW LINE
LEADS TO
APRILAIRE
TERMINALS
DO NOT USE
EXTERNAL
24 VAC OR
120 VAC
SOURCE.
DAMAGE TO
NOTE
COMPONENTS
OF HUMIDIFIER
SOME FURNACES ARE EQUIPPED WITH
CAN OCCUR.
ACCESSORY TERMINALS THAT CAN BE USED
FOR THE HUMIDISTAT. THE RP MODEL 50 CURRENT
SENSING RELAY (NOT FURNISHED) MAY NOT BE
NECESSARY IN THIS CASE. CONSULT THE FURNACE
MANUFACTURER'S RECOMMENDATIONS FOR WIRING.
Downflow
Upflow
Horizontal
™