Operation Notes; Wiring Diagram Locater - Lennox EDA Installation, Setup And User Manual

lower temperature removing additional humidity. At the same time, the Humiditrol
three-way valves reposition themselves and the Humiditrol coil becomes active.
This allows condenser heat to warm the indoor air to avoid excessive overcooling
of the home. During cooling only (no Humiditrol operation) the Humiditrol coil is
inactive.
• The Humiditrol coil is added to an HVAC system downstream of the indoor coil.
In dehumidification mode, the coil becomes an extension of the outdoor coil and
injects heat into the indoor air stream.
• This dehumidification mode allows significantly improved control of the humidity
in the conditioned space with less chance of overcooling the space.
• The assembly includes a set of 3-way diverting valves which will either route
refrigerant through the Humiditrol coil, or cause the refrigerant to bypass the that
coil, depending on the mode of operation.
1.3.4.

Operation Notes

• Dehumidification will not occur when the outdoor temperature is at or above 95ºF
or indoor temperature is at or below 65ºF.
• When operating in cooling (or heat pump heating) mode, all temperatures and
pressures will be as in a normal system.
• When the thermostat is in Humiditrol mode, and after a cooling demand has been
satisfied but a dehumidification demand persists, and the room temperature is
within the MIN, MID, MAX parameters described in Using Humiditrol Comfort
Adjust (see "2.7. Using Humiditrol Comfort Adjust" on page 19), the air handlers
will operate at reduced airflow with the compressor at high speed.
• When the unit is in the dehumidification mode, the thermostat will display
"dehumidify or an icon" on the home screen.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of all refrigerants (CFC,
HFC, and HCFC) as of July 1, 1992. Approved methods of recovery, recycling
or re c laiming must be followed. Fines and/or incarceration may be levied for
non-compliance
WARNING
Improper installation, adjustment, alteration, ser v ice or maintenance can cause
property damage, personal injury or loss of life.
Installation and service must be performed by a li c ensed professional HVAC
installer (or equivalent) or a service agency.
WARNING
Risk of explosion or fire.
Can cause injury or death.
Recover all refrigerant to relieve pressure before opening the system.
1.4.

Wiring Diagram Locater

Table 4.
Thermostat Indoor Unit Control
ComfortSense 7500 or
Non-communicating
iComfort M30
ComfortSense 7500 or
Non-communicating
iComfort M30
Lennox
ComfortSense 7500 or
Communicating wired
iComfort M30
as non-communicating
Lennox
iComfort E30 Communicating wired
as non-communicating
Lennox
iComfort S30
Communicating
4
Wiring Diagram Locater
Outdoor Unit Control Wiring Diagram
"Figure 11. CS7500
or M30 with any Non-
Non-communicating Communicating Indoor
and Outdoor Units" on
page 12.
"Figure 12. CS7500
or M30 with Non-
Communicating Indoor
Lennox
Communicating and Communicating
wired as 24VAC
Outdoor Units
Conventional
Wired for Non-
Communicating" on
page 13.
"Figure 13. CS7500
or M30 with
Communicating Indoor
Lennox
Communicating wired and Outdoor Units
as non-communicating
with Both Wired Non-
Communicating" on
page 14.
"Figure 14. E30
with both Indoor
and Outdoor
Lennox
Communicating wired Communicating
as non-communicating
Units Wired for Non-
Communicating" on
page 15.
"Figure 15. S30
Wired System for
Lennox
Communicating Communicating" on
page 16.