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Application
• Two zones
• Single-stage electric or gas furnace
• Single-stage air conditioner
• Multi-stage equipment can be used provided that it
stages on it’s own internal controls
• Not applicable to heat pump systems
Installation
• Install the control panel indoors only.
• Do not install the control panel where the tempera-
ture will exceed 140°F or will drop below 32°F.
• Do not install the control panel on foundation
walls, HVAC equipment or duct system where
moisture may condense on the enclosure.
• Do not install the control panel in a room where it
will be exposed to elevated humidity levels such
as a laundry room.
1. Remove the cover. Replace the cover when
installation is complete.
2. There are eight slots on the base of the enclosure
(see Figure 2).
3. Use #8 screws (field supplied) to install the base.
Features
• Adjustable high and low discharge air temperature limits
• ON/OFF duct air purge control
• LED indicators for outputs
• Time Delay Override
• 2 or 3-wire damper compatibility
FIGURE 2 – CONTROL PANEL AND ENCLOSURE BASE
R39
R36
J2
R8
C10
RV5
D20
R1
D10
R7
R32
R10
+
C17
R11
D7
D17
RV4
R31
D21
R30
R9
U4
U6
D8
RV3
F2
R34
J4
D15
C16
R12
R33
D23
R37
K2
U3
R43
D18
C7
+
D24
RV8
+
C5
R21
R20
R45
R4
R41
R40
R47
R17
C21
RV6
R46
D14
Q1
R3
D12
D13
C22
D9
F1
K4
C3
+
D1
R44
R5
R23
D3
D6
D5
D11
K5
R2
U1
+
C6
C18
R6
R38
C12
R22
D4
+
C14
R35
SW1
R19
R14
C1
C20
K3
R29
+
C4
RV1
D2
C8
R13
D16
J1
5VDC
R
G
Y
NO
R
G
Y
ZONE 2
ZONE 1
TDO
+
C2
RV2
C9
R26
Y1
U5
ELECT.
R15
U2
R24
R16
C13
RH
X3785 REV. 1
LZP-2
R28
MAIN FUSE
CL-45
R27
RV7
24VAC
C
R
K1
DAS
D19
SPARE FUSE
C15
+
40
140
HT-160
EQUIP.
J3
24VDC
RC
Y
PURGE
R18
C
NC
W
C
C11
TP4
J5
G
GND
R42
NC
NO
W
Y
R25
G
W
FLASHING
NORMAL
GAS
LENNOX
DamperZ2
NoPURGE
DamperZ1
W
D22
C19
CAUTION
Electrostatic discharge can damage the control.
Touch a grounded metal object before touching
the circuit board, and then only touch the circuit
board on the edges when handling.
(8) Mounting
Slots
The above illustration shows a typical two zone control system.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life. Installation
and service must be performed by a qualified
installer, service agency or the gas supplier.