Aprilaire 400 Series User manual

READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION
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.
ATTENTION INSTALLER:
MODEL 400 SERIES HUMIDIFIER
The Model 400 and 400M 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 [phone]
RETURN
SUPPLY
S
RETURN
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
hot water supply line.
SPECIFICATIONS
HUMIDIFIER DIMENSIONS
Width (including solenoid valve): 15 3⁄8”
Height (including drain spud): 15 3⁄4”
Depth:101⁄4”
BYPASS DUCT OPENING
6” diameter
PLENUM OPENING
10”W x 123⁄4”H
ELECTRICAL 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 400 or 400M
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.
RISK OF PROPERTY AND EQUIPMENT DAMAGE.
INSTALLATION
OPTIONS
RECOMMENDED WIRING DIAGRAM
(SEE STEP 7 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)
FURNACE
BLOWER MOTOR
MODEL 50
CURRENT SENSING RELAY
(IF REQUIRED)
24 VAC FURNACE ACCESSORY
TERMINALS OR TRANSFORMER
(10VA MINIMUM)
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.
COMMON
HI
LO
WATER SUPPLY
SHUT-OFF
(SADDLE VALVE)
CONNECT OVERFLOW TUBE HERE
YELLOW
WIRES
WHITE
WIRES
CONTINUOUSLY POWERED 24 VAC
TRANSFORMER PROVIDED WITH HUMIDIFIER
THERMOSTAT
OUTPUTSINPUTSPOWER
GW
CRHHODT GfA
ADHC TERMINAL STRIP
B
110 VAC
R
C
W
Y
G
FURNACE
YELLOW WIRES
WHITE WIRES
CONNECT TO
HOT WATER SUPPLY
CONNECT
OVERFLOW
TUBE HERE
OUTDOOR TEMPERATURE
SENSOR FOR
AUTOMATIC MODE
NORTH, EAST
OR WEST SIDE
OF HOME
ABOVE EXPECTED
SNOW LINE
G
Y
W
C
R
90-1513
90-1399
Mod l 400M
MANUAL CONTROL
Mod l 400
DIGITAL HUMIDIFIER CONTROL
NOTE
When installing Model 400 humidifier on a
heat pump system, the evaporative capacity
will be reduced due to air temperatures
below 120 F. Plumbing to hot water partially
offsets the reduction.

5
6
4
2
1
9
12
3
7
11
10
13
14
8
READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION
TEMPLATE MUST BE LEVEL
– TOP –
READ REVERSE SIDE FIRST! READ REVERSE SIDE FIRST!
1. Press top & bottom tabs to
remove cover (1). Pull feed
tube (3) out of distribution tray
(4). Remove Water Panel®
Evaporator assembly. See
Figur 1.
2. Humidifier is supplied with
bypass duct connection on
left. For right side bypass,
swap location of water level
sensor assembly (9) and cap
(10).
3. Position template on supply
or return plenum. Make sure
template is level. Allow
clearance for drain line and
for servicing. Trace template
outline. Cut 10” wide x 12-3/4”
high opening. Avoid injury
from sharp dg s.
4. Place humidifier base (2) in
opening and secure with 6
screws in openings provided.
5. Select location for 6” collar
on opposite plenum to minimize
length and number of elbows in
bypass duct. Install 6” bypass
duct components. Attach duct
to humidifier collar using 2
screws in openings provided.
6. Insert Water Panel
Evaporator assembly into base.
Make sure bottom of scale
control insert (6) is seated in
water level sensor assembly (9).
Snap top of evaporator
assembly into base. Insert feed
tube into distribution tray. See
Figur 2. Make sure float cover
(14) is snapped into place and
that floats (13) move freely up
and down. Rotate nameplate
(11) if necessary, so it is right
side up. Place point bypass
damper handle (8) to “WINTER”
(open) for heating season and
“SUMMER” for cooling season.
7. Control installation and
wiring. Disconn ct
l ctrical pow r to furnac
b for wiring control. In
order for humidifier to
operate, furnace must be
on and RH must be below
set-point of control. Wiring
diagram illustrates
recommended method of
detecting furnace
operation.
MANUAL HUMIDIFIER
CONTROL, MODEL 400M:
Manual Control can be
mounted in return duct or
on wall in living space.
Knob and cover must be
removed to mount control.
See wiring diagram for 24V
control connections.
Figur 1 Figur 2 Figur 3
10008973 B2205115A 4.10
90-1165 90-1068 90-1069
90-1263
• For return duct mounting,
position template at least 6”
upstream of bypass duct
connection or humidifier.
Avoid injury from sharp
dg s wh n cutting
op ning. Make sure foam
gasket is in place and
secure control to duct using
2 screws in holes provided.
• For wall-mount, select
location that will not be
affected by drafts or heat
sources. Remove and
discard foam gasket and
secure control to wall over
wire access opening using
screws & anchors provided.
DIGITAL HUMIDIFIER
CONTROL, MODEL 400:
• Select location for control
on return duct at least 6”
upstream of bypass duct
connection or humidifier.
Drill 3/4” hole for sensor.
Knob and cover must be
removed to mount control.
Place control on duct with
RH sensor extending into
duct opening. Make sure
gasket is in place around
sensor cage. Secure control
to duct using 2 screws in
openings provided.
• See wiring diagrams on
template and control
instructions for 24 V control
connections.
8. Humidifier will function with
cold, softened or unsoftened
water. Hot water (140 F max)
is strongly recommended to
provide maximum evaporation
capacity. Saddle valve
provided may be used to tap
into water supply. See
installation instructions on
saddle valve package. Saddle
valve is designed to be fully
opened or closed. Do not use
to regulate flow.
9. Run 1/4” copper tubing from
saddle valve to solenoid valve.
DOUBLE-WRENCH TO PREVENT
LEAKING. See Figur 3.
10. INSTALL DRAIN IN
ACCORDANCE WITH LOCAL
CODES. Run 1/2” I.D. hose
from drain spud to floor drain.
Make sure drain has constant
downward slope and is not
kinked. Do not over-tighten
hose clamp onto drain spud.
Do not use solvent adhesive
on drain spud.
11. Check humidifier
operation. Open saddle valve
and turn control to highest
setting. Turn on furnace. Make
sure all electrical connections
are secure and all plumbing
connections are water-tight.
Set control to proper setting.
1. Front Cover
2. Base
3. Feed Tube
4. Water Distribution Tray
5. Water Panel Evaporator
6. Scale Control Insert/Float Chamber
7. Integral Damper
8. Damper Handle
9. Water Level Sensor Assembly
10. Hole Plug
11. Nameplate
12. Solenoid Valve
13. Float
14. Float Cover
PARTS LIST
FURNISHED ITEMS
ITEMS NOT FURNISHED
Built-in bypass damper
24 VAC Transformer
Digital Humidifier Control (Model 400)
Manual Humidifier Control (Model 400M)
Humidifier Control Installation
Instructions
Saddle valve
Humidifier Installation Template
Mounting screws (sheet metal screws)
Water supply line (1⁄4” copper)
Drain line (1⁄2”I.D. hose)
Low voltage wire
Bypass ductwork
Model 50 Current Sensing Relay
(if required)
IMPORTANT! Be sure owner’s manual containing
instructions for operation and warranty information is given to
owner in order to avoid unnecessary calls. Warranty is void unless
humidifier is installed by qualified heating and air conditioning
contractor due to possible misapplication of product.
NOTE: BEFORE LEAVING THE
JOB SITE, MAKE SURE:
1. Saddl valv is fully op n.
2. All plumbing conn ctions ar
wat rtight.
3. Humidifi r functions prop rly.
4. Bypass damp r is in prop r
position.