WIRE JUMPER
(HOT)
115v.
60CY.
ON-OFF SWITCH
COMMON LEAD
FURNACE
C
HI
LO
GA50
CURRENT
SENSING
RELAY
MULTI
SPEED
BLOWER
MOTOR
AC L
AC N
HUM
24V. SOLENOID VALVE
727-58 24 V. TRANSFORMER
(HOT)
C
115v.
60CY.
ON-OFF SWITCH
AC L
AC N
HUM
SNSR
24V. SOLENOID VALVE
24 V. TRANSFORMER
L1
C
NO
(HOT)
L2
115v.
60CY.
ON-OFF SWITCH
HEP-12500 AIR
PRESSURE SWITCH
AC L
AC N
HUM
SNSR
SNSR
SNSR
24V. SOLENOID VALVE
24 V. TRANSFORMER
R
FURNACE
CONTROL BOARD
C
24v.
60CY.
AC L
AC N
HUM
24V. SOLENOID VALVE
FURNACE
BOARD
W
WIRE JUMPER
OUTDOOR TEMP. SENSOR
OUTDOOR TEMP. SENSOR
OUTDOOR TEMP. SENSOR
OUTDOOR TEMP. SENSOR
N
W 24v.
60CY.
ACC
EAC
(HOT)
C
115v.
60CY.
ON-OFF SWITCH
COMMON LEAD
FURNACE
C
HI
LO
GA50
CURRENT
SENSING
RELAY
MULTI
SPEED
BLOWER
MOTOR
24V. SOLENOID VALVE
HUMIDISTAT
24 V. TRANSFORMER
(HOT)
C
115v.
60CY.
ON-OFF SWITCH
24V. SOLENOID VALVE
24V. SOLENOID VALVE
24 V. TRANSFORMER
L1
C
NO
(HOT)
L2
115v.
60CY.
ON-OFF SWITCH
HEP-12500 AIR
PRESSURE SWITCH
24 V. TRANSFORMER
HUM
FURNACE
CONTROL BOARD
C
24v.
60CY.
24V. SOLENOID VALVE
HUMIDISTAT
HUMIDISTAT
HUMIDISTAT
FURNACE
BOARD
WIRE
JUMPER
WIRE
JUMPER
WIRE
JUMPER
WWW.CLEANCOMFORT.COM
3
IO-HE12-A
IO-HE12-A
3/4˝ TEE
1/2˝ TEE
HEP-GCV3412 Code Valve Installation Option:
Copper Pipe
1.
Turn off water supply.
2.
Clean pipe, fittings and valve with sandpaper or wire brush.
3.
Apply a thin layer of flux to all surfaces to be soldered.
4.
Assemble valve to pipe and/or fittings.
5.
Cooling the valve by wrapping a wetted rag around
the valve is optional.
6.
Heat the joints with a torch. Apply solder to each joint.
Continue to apply heat sufficient to keep solder liquid.
7.
After solder has filled entire joint area, remove heat
and allow joint to cool. Do not move or disturb.
8.
Slide compression nut over 1/4˝ copper tube
followed by compression sleeve.
9.
Insert tube into valve fully and tighten nut.
10.
Turn on water supply and check for leaks.
4b
5
6
7A-7D Electronic
Humidistat
7A – To furnace control board
24 volts
7B – To constant power using
24V transformer and
pressure switch
7C – To furnace control board
115 volts with 24V
transformer
7D – To constant power using
24V relay and current
sensing relay
7E-7H Manual Humidistat
7E – To furnace control board
24 volts
7F – To constant power using
24V transformer and
pressure switch
7G – To furnace control board
115 volts with 24V
transformer
7H – To constant power using
24V relay and current
sensing relay
Connect 1/4˝supply tube at inlet of solenoid (there is an internal
brass filter beyond inlet, not shown).
DO NOT USE PLASTIC
TUBING IN CONTACT WITH ANY HOT PLENUM
SURFACE OR DUCT. IF USING PLASTIC TUBING,
USE TUBE SUPPORT HEP-P189 AND PLASTIC COM-
PRESSION SLEEVE HEP-P190
(Supplied with humidifier).
Connect drain hose to 1/2˝ spout on humidifier cabinet using
hose clamp. Run 1/2˝ hose to suitable drain such as floor drain,
sewer or laundry sink. Be sure hose has continuous slope and is
not kinked at any point.
Turn damper knob to winter (open) position. Turn on water
supply and check operation of humidifier. Set humidistat to a
demand setting. With the furnace off, the solenoid valve should
be closed. Start the furnace, the solenoid valve should open
when the blower or burner circuit is energized. Check flow
of water through distributor trough and evaporator pad.
The standard HEP-GA4231 YELLOW orifice will supply
approximately 3.5 GPH of water at a line water pressure
of 60 psi. For low water pressures (20-40 psi) a larger ORANGE
orifice HEP-GA4299 is available to provide the same flow.
Leave humidistat set at the recommended setting.
7
7A
7E
7G
7H
7D
7F
7B
7C
* CODE VALVE IS INCLUDED WITH AUTOMATIC MODELS ONLY,
but can be purchased separately as part number HEP-GCV3412.
