Aprilaire Humidifier 600M Users Manual 10008975A AA 600

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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

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.

SPECIFICATIONS

RISK OF PROPERTY AND EQUIPMENT DAMAGE.

HUMIDIFIER DIMENSIONS

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.

2. Do not install humidifier or bypass connection on the
furnace jacket.

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.

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.

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.

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.

DIGITAL HUMIDIFIER CONTROL
ADHC TERMINAL STRIP
C

INPUTS
A

B

ODT

W

OUTPUTS
G

H

H

Gf

NORTH, EAST
OR WEST SIDE
OF HOME

3 gph
ELECTRICAL DATA

24 VAC-60 Hz, 0.5 AMP

INSTALLATION
OPTIONS

S

SUPPLY

R

C

C

G

G

Y

Y

W

W

THERMOSTAT

RETURN
110 VAC
CONNECT DRAIN
CONNECT TO
LINE HERE
HOT WATER SUPPLY

FURNACE

90-1510

MANUAL CONTROL

WATER FEED RATE

YELLOW WIRES

R

Model 600M

10”W x 12 3 ⁄ 4”H

Upflow

OUTDOOR TEMPERATURE
SENSOR FOR
AUTOMATIC MODE

ABOVE EXPECTED
SNOW LINE

PLENUM OPENING

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
S and
serviceability must be considered when selecting
the best location for the humidifier. Here are
2 examples of many types of installations.

Model 600

R

6” diameter

8. Do not install humidifier on systems with
greater than 0.4 in. wg pressure differential
between supply and return plenums.

(SEE STEP 7 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)

POWER

BYPASS DUCT OPENING

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.

RECOMMENDED WIRING DIAGRAMS

Width (including solenoid valve): 15 3⁄ 8”
Height (including drain spud): 15 3⁄ 4”
Depth: 10 1 ⁄ 4”

CONTINUOUSLY POWERED
24 VAC TRANSFORMER
PROVIDED WITH HUMIDIFIER

Horizontal

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.

R
RETURN

24 VAC FURNACE ACCESSORY
TERMINALS OR TRANSFORMER
(10VA MINIMUM)

SHUT-OFF
(SADDLE VALVE)

SUPPLY

WATER SUPPLY

COMMON

90-1079

MODEL 50
CURRENT SENSING RELAY
(IF REQUIRED)

HI
LO

IMPORTANT
FURNACE
BLOWER MOTOR

YELLOW 24V
SOLENOID
VALVE WIRES

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.

NOTE

90-1207

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.

CONNECT DRAIN LINE HERE

RESEARCH PRODUCTS CORPORATION • P.O. BOX 1467 • MADISON, WI 53701-1467 • CALL 800/334-6011 • FAX 608/257-4357

– TOP –

READ REVERSE SIDE FIRST!

READ REVERSE SIDE FIRST!

READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION
Figure 1

FURNISHED ITEMS

Figure 2

Figure 3

Built-in bypass damper
24 VAC Transformer
Digital Humidifier Control
(Model 600 only)
Manual Humidifier Control
(Model 600M only)
Humidifier Control Installation Instructions
Saddle valve
Humidifier Installation Template

ITEMS NOT FURNISHED
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)

1. Press top & bottom tabs
to remove cover (1).
Pull feed tube (3) out of
distribution tray (4). Remove
Water Panel® Evaporator
assembly. See Figure 1.
2. Humidifier is supplied
with bypass duct
connection on left. For right
side bypass, swap location
of drain spud (9) and cap
(10). Twist to remove spud
and cap.

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
edges.

90-1067

90-1068

4. Place humidifier base (2) in

7. Control installation

opening and secure with 6 screws
in openings provided.

and wiring. Disconnect
electrical power to furnace
before wiring control.
In order for humidifier to
operate, furnace must be
on and RH must be below
set-point of control.
Wiring diagrams illustrate
recommended method of
detecting furnace
operation.

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 in drain spud. Snap top of
evaporator assembly into base.
Insert feed tube into distribution
tray. See Figure 2. 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.

MANUAL HUMIDIFIER
CONTROL, MODEL 600M:
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.

PARTS LIST
1. Front Cover
2. Base
3. Feed Tube
4. Water Distribution Tray
5. Water Panel Evaporator
6. Scale Control Insert
7. Integral Damper
8. Damper Handle
2
9. Drain Spud
10. Hole Plug
11. Nameplate
12. Solenoid Valve

12
10
4
5

1

8

9

6

TEMPLATE MUST BE LEVEL

• 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 600:
• 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.

3

7

90-1250

• For return duct mounting,
position template at least 6”
upstream of bypass duct
connection or humidifier.
Avoid injury from sharp
edges when cutting
opening. Make sure foam
gasket is in place and
secure control to duct using
2 screws in holes provided.

11

90-1069

8. Humidifier will function with
cold, hot, softened or unsoftened
water. Hot water (140°F max) is
strongly recommended to provide
maximum evaporative 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 Figure 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. Allow
humidifier to run until water
flows from drain. Make sure
all electrical connections are
secure and all plumbing
connections are water-tight.
Set control to proper setting.
NOTE: BEFORE LEAVING THE
JOB SITE, MAKE SURE:
1. Saddle valve is fully open.
2. All plumbing connections are
watertight.
3. Humidifier functions properly.
4. Bypass damper is in proper
position.

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.
10008975 B2205117A 4.10



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