700
Return
Supply
Return
Hot Water
Drain Line
Floor Drain
or Condensate
Pump
Supply
Drain Line
Floor Drain or
Condensate
Pump
Return
Supply
Hot Water
Drain Line
Floor Drain
or Condensate
Pump
Supply
Model 700 Series Humidifier Template
ATTENTION INSTALLER
Read this installation template before installing humidifier.
Warranty is void unless humidifier is installed by qualified
heating and air conditioning contractor due to possible
misapplication of product. This product must be installed in
compliance with all local, state, and federal codes. Proper
humidification and humidity control require that the home
be constructed with local codes and good building practices.
WARNING
ELECTRICAL SHOCK HAZARD. Disconnect power to the
furnace before installing humidifier.
CAUTION
SHARP EDGES. Use care when cutting and handling
ductwork.
HOT WATER CAN SCALD. Shut o hot water supply
before tapping into hot water supply.
NOTICE
FREEZING TEMPERATURES CAN BURST WATER PIPES.
Do not install humidifier where freezing may occur.
CONDENSATION DAMAGE OR MOLD CAN OCCUR.
SPECIFICATIONS
Humidifier Dimensions:
Width: 15-29/32"
Height (including solenoid valve and drain spud): 18"
Depth: 10-11/32"
Plenum Opening: 14-3/4"W x 14-5/16"H
Water Feed Rate: 3 gph
Electrical Data: 24 VAC, 60 Hz, 0.8 Amp
Water Panel®: Model 35
FURNISHED ITEMS
• 24 VAC transformer
• Automatic Digital Humidifier Control and
Outdoor Temperature Sensor (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" O.D. copper)
• Drain line (1/2" I.D. hose)
• Low voltage wire
• Model 50 current sensing relay (if required)
INSTALLATION OPTIONS
Aprilaire® Model 700 and 700M can be installed on either the supply plenum or cold air return of a forced air handling system. The humidifier dimensions and serviceability must be considered when
selecting the best location for the humidifier.
Hot water is recommended (140°F max) to provide maximum evaporative capacity. It is also recommended when the Blower Activation Feature is used with an Automatic Digital Humidifier Control, or
on a heat pump system. The humidifier functions with cold, hot, softened, or unsoftened water.
RECOMMENDED RECOMMENDED ALTERNATE
Return
Supply
Install humidifier
as shown in relation
to cooling coils
Drain Line
Floor Drain or
Condensate
Pump
Return
Supply
Drain Line
Floor Drain or
Condensate
Pump
Hot Water
Drain Line
Floor Drain
or Condensate
Pump
Return
90-2232
Locate return duct mounted humidifier control at least
6" upstream of humidifier, or fresh air intake for accurate
humidity sensing.
Locate wall mount humidifier control in areas
unaected by drafts or heat sources for accurate
humidity sensing.
Reduce the setting on the humidifier control if
condensation forms on windows or in unheated spaces.
EQUIPMENT DAMAGE MAY OCCUR.
Do not install humidifier on the furnace jacket.
Do not connect the power cord to multi-speed furnace
blower motors or blower motors other than 120 VAC.
Use Aprilaire Model 50 Current Sensing Relay. Do not
alter 120 VAC plug or hardwire the unit.
Do not install the humidifier on a plenum face at the
blanked end of the cooling coil.
If water pressure exceeds 125 psi, reduce water pressure
with devices allowed by local codes.
Do not use water with temperature greater than 140°F.
Do not install humidifier on systems with dierential
pressure greater than 0.4 w.g. between the supply and
return plenums.
When installing the humidifier control on the return duct
of a downflow furnace, ensure the blower continues to
run after a heat call is satisfied.
PARTS LIST
1. Front Cover
2. Base
3. Orifice Plate
4. Motor Mount Bridge
5. Scale Control Insert
6. Water Panel®
7. Water Distribution Tray
8. Fan Blade
9. Motor
10. Motor Mount Gasket
11. Relay
12. Power Cord
13. Strain Relief Bushing
14. Solenoid Valve
15. Connector Plug
16. Feed Tube
17. Nozzle
18. Relay Connector
19. Transformer
20. Strainer
21. Orifice
2
20
14
15
5
21
19
7
17
16
6
3
8
4
1
18
10
9
13
12
11
TEMPLATE MUST BE LEVEL
90-1436
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