Aprilaire 700 Application Manual page 18

TyPICAl WIRInG dIAGRAMS – InACCeSSIBle SuPPly oR ReTuRn PlenuM
noTe: Humidifier controls should only be mounted on the return plenum. If the return plenum is inaccessible, mount a manual or digital
manual control in the living space to be humidified.
MAnuAl HuMIdIFIeR ConTRol WIRInG
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.
24 VAC FURNACE ACCESSORY
TERMINALS OR TRANSFORMER
(10VA MINIMUM)
COMMON
MODEL 50
HI
CURRENT SENSING RELAY
(IF REQUIRED)
LO
IMPORTANT
WHEN MODEL 50 CURRENT SENSING RELAY IS USED:
FURNACE
• WIRE MODEL 50 CURRENT SENSING RELAY
BLOWER MOTOR
INTO 24 VAC HUMIDIFIER CONTROL CIRCUIT
ONLY! DO NOT INSTALL IN TRANSFORMER
PRIMARY CIRCUIT.
MAnuAl ConTRol
WITH BloWeR ACTIVATIon WIRInG
REMOVE WIRE
TYPICAL 24 VAC
"G" TO "G"
TERMINAL STRIP
THERMOSTAT IN FURNACE
NOTE: 18AWG WIRE IS ACCEPTABLE
FOR 24V INSTALLATIONS.
NOTE: FOR MAXIMUM CAPACITY PLUMB
HUMIDIFIER TO HOT WATER WHEN USING
THIS WIRING CONFIGURATION.
NORTH, EAST
OR WEST SIDE
OF HOME
OUTDOOR
TEMPERATURE
SENSOR FOR
AUTOMATIC MODE
ABOVE EXPECTED
SNOW LINE
18
SHUT-OFF
(SADDLE VALVE)
WATER SUPPLY
120 VAC
OUTLET
CONNECT DRAIN LINE HERE
APRILAIRE
4851 RELAY
APRILAIRE
HUMIDIFIER
500 & 600 SERIES
YELLOW WIRES
WHITE/YELLOW
700 SERIES (GRAY)
BROWN WIRES
WHITE/BLUE
CONSTANT
24VAC
MIN. 10VA
TERMINALS FOR THE
MANUAL HUMIDIFIER CONTROL
(MHC)
AuToMATIC dIGITAl ConTRol WIRInG
R
R
C
C
G
G
Y
Y
W
W
THERMOSTAT FURNACE
dIGITAl MAnuAl ConTRol WIRInG
MODEL 65 CONTROL
90-1208
BROWN WIRES
AuToMATIC dIGITAl HuMIdIFIeR ConTRol
WITH Model 800 STeAM HuMIdIFIeR
24 VAC from HVAC
Equipment "R" & "C"
Communication with
Aprilaire 8570 Thermostat
Outdoor Temperature Sensor
Heat Signal from HVAC Equipment
Fan Signal from Thermostat
90-1407
ADHC TERMINAL STRIP
POWER INPUTS OUTPUTS
R C A B ODT W G H H Gf
120 VAC OUTLET
CONNECT DRAIN LINE HERE
CONNECT TO HOT WATER SUPPLY
CONTINUOUSLY POWERED 24 VAC
TRANSFORMER PROVIDED WITH HUMIDIFIER
HVAC EQUIPMENT
COMMON
MOTOR
LEAD
HVAC BLOWER
MODEL 50
APRILAIRE
RELAY
EVAPORATIVE
HUMIDIFIER
24VAC
SOLENOID VALVE CONTINUOUSLY
CIRCUIT WIRES POWERED
TRANSFORMER
MODEL 62 DIGITAL HUMIDIFIER CONTROL
24V TERMINALS
R C A B ODT W G H H Gf
Fan Signal to HVAC Equipment
C
NO
NC
OPTIONAL:
AIR FLOW PROVING SWITCH #4592
Connect 1/4" plastic tubing from H (High) side
of proving switch to the airflow sensing probe
located 1.5 duct diameters downstream of
blower. Leave L (Low) side open to amosphere.
C NO NC
OPTIONAL:
HIGH HUMIDITY LIMIT SWITCH #4594
Switch breaks C to NC connection when
measured RH is above setpoint RH.
BROWN WIRES
110 VAC
90-1514
90-1671
90-1544