Aprilaire 700M specifications Parts List, Read Reverse Side First, Template Must Be Level

READ REVERSE SIDE FIRST! – TOP – READ REVERSE SIDE FIRST!

READ COMPLETE SAFETY INSTRUCTIONS AND INSTALLATION TEMPLATE BEFORE STARTING INSTALLATION

FURNISHED ITEMS	Figure 1
24 VAC Transformer
Digital Humidifier Control
(Model 700 only)
Manual Humidifier Control
(Model 700M 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
Model 50 Current Sensing Relay
(if required)	90-923

Figure 2

90-924

Figure 3

90-925

Figure 4

90-926

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.

PARTS LIST

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

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

15

2

5

14

7
17	1. Front Cover	10. Motor Mount Gasket
	2. Base	11. Control Relay
16	3. Orifice Plate	12. Power Cord
	4. Motor Mount Bridge	13. Strain Relief Bushing
	5. Scale Control Insert	14. Solenoid Valve
6	6. Water Panel Evaporator	15. Connector Plug
	7. Water Distribution Tray	16. Feed Tube
3	8. Fan Blade	17. Nozzle
	9. Motor	18. Relay Connector Plug

8

4

18

10

9

13
12	11

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.

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.

NOTE: BEFORE LEAVING THE JOB SITE, MAKE SURE:

1.Saddle valve is fully open.2.All plumbing connections are watertight.3.Humidifier functions properly.

1

TEMPLATE MUST BE LEVEL 90-1244

IMPORTANT!Be sure owner’smanual containinginstructionsfor operation and warranty information is given to owner in order to avoid unnecessary calls. Warranty is voidunless humidifieris installedby qualified heating andairconditioning contractor due to possiblemisapplication of product.

10008976 B2205118A 4.10