Aprilaire Humidifier 700 Users Manual 10008976A AA

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FURNACE

BLOWER MOTOR

24 VAC FURNACE ACCESSORY

TERMINALS OR TRANSFORMER

(10VA MINIMUM)

MODEL 50

CURRENT SENSING RELAY

(IF REQUIRED)

SHUT-OFF

(SADDLE VALVE)

WATER SUPPLY

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.

IMPORTANT

WHEN MODEL 50 CURRENT SENSING RELAY IS USED:

BROWN WIRES

120 VAC

OUTLET

• DO NOT WIRE TRANSFORMER INTO FURNACE BLOWER CIRCUIT.

• WIRE MODEL 50 CURRENT SENSING RELAY

INTO 24 VAC HUMIDIFIER CONTROL CIRCUIT

ONLY! DO NOT INSTALL IN TRANSFORMER

PRIMARY CIRCUIT.

COMMON

HI

LO

CONNECT DRAIN LINE HERE

G

Y

W

C

R

THERMOSTAT

R

C

W

Y

G

FURNACE

120 VAC OUTLET

BROWN WIRES

CONNECT DRAIN LINE HERE

110 VAC

CONNECT TO HOT WATER SUPPLY

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

OUTPUTSINPUTSPOWER

GW

CRHHODT GfA

ADHC TERMINAL STRIP

B

90-1514

90-1208

Model 700M

MANUAL CONTROL

Model 700

DIGITAL HUMIDIFIER

CONTROL

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:

READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION

MODEL 700 SERIES HUMIDIFIER

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

INSTALLATION OPTIONS

Typical Installation Alternate Installation

COOLING COILS IN

WARM AIR PLENUM

Aprilaire to

be installed

as shown in

relation to

cooling coils.

RECOMMENDED WIRING DIAGRAMS

(SEE STEP 6 ON BACK AND “HUMIDIFIER CONTROL SAFETY AND INSTALLATION INSTRUCTIONS” FOR DETAILED WIRING INSTRUCTIONS)

90-922

90-921

RETURN RETURN

HOT WATER

SUPPLY SUPPLY

Orientation of Aprilaire Model 700

and 700M to Cooling Coils

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 15 29⁄32”

Height (including solenoid valve

and drain spud) 18”

Depth 1011⁄32”

PLENUM OPENING

143⁄4”W x 145⁄16”H

WATER FEED RATE

6 gph

ELECTRICAL DATA

120 VAC-60 Hz, 0.8 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 on the furnace jacket.

3. Do not install humidifier 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 the Model 700 or 700M power cord 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. When installing Humidifier Control on a 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 the supply plenum where static

pressure exceeds 0.4 in. wg.

RISK OF PROPERTY AND EQUIPMENT DAMAGE.

BLANKED OFF

END OF COIL

NOTES

1. Models 700 and 700M

are not suitable for

installation on ducts

with horizontal airflow.

Performance will be

reduced.

2. 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.

READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION

TEMPLATE MUST BE LEVEL

– TOP –

READ REVERSE SIDE FIRST! READ REVERSE SIDE FIRST!

Figure 1

10008976 B2205118A 4.10

90-923 90-924 90-925 90-926

Figure 2 Figure 3 Figure 4

6

7

12

5

23

1

16

4

18

9

14

11

10

8

13

15

17

90-1244

1. Detach the cover assembly by

lifting the latch at the bottom.

Remove the Water Panel®

evaporator assembly by grasping

at top and tipping out. See Figure 1.

2. Position template on supply

plenum. Make sure template is

level. Allow clearance for drain line

and for servicing. See “Installation

Options” on opposite side for

position relative to cooling coil.

Trace template outline. Cut 14-3/4”

wide x 14-5/16” high opening. Avoid

injury from sharp edges.

3. Position base (2) in duct opening

top-first so hooks engage sheet metal

at top. See Figure 2. Insert bottom of

base and slide down to engage hooks

at bottom.

4. Rotate swing locks to secure base

to duct. See Figure 3. Fasten base to

duct using 4 sheet metal screws in

holes provided.

5. Insert Water Panel Evaporator

assembly into base. Make sure bottom of

scale control insert (5) is over drain

opening. Snap top of evaporator assembly

into base.

6. Control installation 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.

MANUAL HUMIDIFIER CONTROL,

MODEL 700M:

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.

• For return duct mounting, position

template in convenient location on duct.

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.

• For wall-mount, select location that

will not be affected by drafts or heat

sources. Remove and discard foam

gasket and secure control over wire

access opening using screws &

anchors provided.

DIGITAL HUMIDIFIER CONTROL,

MODEL 700:

• Select location for control on return

duct. 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.

7. 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.

8. Run 1/4” copper tubing from saddle

valve to solenoid valve. DOUBLE-WRENCH

TO PREVENT LEAKING. See Figure 4.

9. 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.

10. 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.

FURNISHED ITEMS

24 VAC Transformer

Digital Humidifier Control

(Model 700 only)

Manual Humidifier Control

(Model 700M only)

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

Model 50 Current Sensing Relay

(if required)

ITEMS NOT FURNISHED

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.

PARTS LIST

1. Front Cover

2. Base

3. Orifice Plate

4. Motor Mount Bridge

5. Scale Control Insert

6. Water Panel Evaporator

7. Water Distribution Tray

8. Fan Blade

9. Motor

10. Motor Mount Gasket

11. Control Relay

12. Power Cord

13. Strain Relief Bushing

14. Solenoid Valve

15. Connector Plug

16. Feed Tube

17. Nozzle

18. Relay Connector Plug

NOTE: BEFORE LEAVING THE

JOB SITE, MAKE SURE:

1. Saddle valve is fully open.

2. All plumbing connections are

watertight.

3. Humidifier functions properly.