Lennox Zoning System LZP-4 User manual

Page 1
© 2004 Lennox Industries Inc.
Dallas, Texas, USA
Litho U.S.A.
504,927M
5/2004
LZP-4
ZONE CONTROL PANEL
INSTALLATION INSTRUCTIONS FOR ZONE CONTROL PANELS
USED WITH LENNOX HEATING AND COOLING EQUIPMENT
Shipping & Packing List
Package 1 of 1 contains the following:
(1) Model LZP-4 Zone Control Panel
(1) Model 88K38 Temperature Sensor
(1) Installation Instructions
(1) Owners Manual
(1) Warranty Card
Required Components (ordered separately):
24 VAC Transformer – The size of the transformer
needed is determined by the total power
requirements for the control panel, thermostats and
dampers. The control panel and thermostat together
require 10VA. The dampers require 10VA each. The
size of the transformer will depend on the greatest
number of dampers that could be energized at any
given time. NOTE – When using power close, spring
open dampers, at least one zone’s dampers will not
be energized during a heating or cooling call.
Thermostats – see selection chart on page 5.
Only 24-volt electronic thermostats with a common
connection are to be used with this zoning panel. Do
not use mechanical or power robbing thermostats.
Dampers – 2 or 3-wire, 24-volt dampers required.
2-wire, power closed/spring open preferred.
Application
• Up to four zones
• Single or two-stage furnace
• Single or two-stage air conditioner
• Single or two stage-heat pump with one stage of
electric auxiliary heat; separate emergency heat
output available
• Single or two stage-heat pump with single-stage fossil
fuel auxiliary heat (dual fuel system)
Features
• Adjustable high and low discharge air temperature limits
• Vacation (central) mode setting
• Staging control by number of zones calling
• Staging control by time or thermostat input
• Auxiliary heat control by time or thermostat input
• Standard single-stage heat/cool thermostats or heat
pump thermostats can be used to control heat pumps
or multi-stage equipment
• Dual fuel system compatible
• ON/OFF duct air purge control
• Visible LED outputs
• Time Delay Override
• Zone1 or Any Zone mode control
• 2 or 3-wire damper compatibility
ZONING SYSTEM
TABLE 1 – TRANSFORMERS
Part Number Size Voltage Description
10P17 40VA 120/208/240V-24V
10P87 50VA 120/208/240V-24V
12P61 75VA 120/208/240V-24V
83P74 4" Square Electrical Box

Page 2
FIGURE 1 – LZP-4 CONTROL PANEL SCHEMATIC

Page 3
Installation
FIGURE 2 – ENCLOSURE BASE WITH
CIRCUIT BOARD
R90
R109
D62
TP5
K8
27
61
10
1
U2
44
D4
R12
R123
C27
+
R40
U6 U7
R30
R86
R34
C31
+
R122
R8
R78
C15
+
R60
R120
U1
R91 R136
R137
R101
W2
K5
C26
+
R65
RV16
D58
R130
D19
C30
+
C5
R68
R114
R108
R124
D52
R13
R98
R56
R46
C7
R59
R31
R39
Y1
R28
R92
R87
R80
R7
R23
D47
R70
R2
D10
R111
R66
R76
R45
D30
D42
K1
C
R16
R41
R103 D49
R93
R22
D54
R42
R57
R21
D21
RV8
D39
R36
R89
C10
R140
R115
C17
+
R67
U4
C19
+
R85
D23
K9
SW4
SELECTOR
HEAT PUMP
ELECTRIC
SELECTOR
Zone 1
E-HEAT
EQUIP.
ZONE/VAC
D26
R44
DAS
J1
R107
D27
F2
R58
R1
D35
R50
R37
RV4
D16
D51
R55
D8
R127
D43
R77
D56
K6
24VAC
D31
R71
D6
C2
TST
J2
R104
MAIN FUSE
ZONE
R53
R33
R138
R32
R35
R51
Q1
Q1
RV14
C21
+
D18
R82
C23
+
D12
D59
SPARE FUSE
R5
R52
R29
C32
+
D38
ZONE 4
NC C NO
2S
R W Y
G 0
J4
R48
R116
R94
K7
RV15
R83
C12
+
D17
R119
D41
D22
R10
K10
SW5
D50
RV3
R49
D40
RV1
C9
+
R84
R79
R4
R47
D24
R132
R112
D3
R25
R73
C4
C25
+
C11
J3
R11
D55
C29
+
D60
R81
SW3
C28
+
R97
D63
D11
D67
R74
D9
TP3
R63
D36
D2
R88
TP7
ZONE 1
NC C NO 2S R W Y G 0
J6
C1
RV10
D33
R106
K3
B
R102
D46
D1
R18 R19
R113
ZONE 3
NC
C
NO
2S
R
W
Y G 0
J5
D28
C14
+
D57
R99
D20
R129
C16
+
D61
R117
TP2
R24
R126
C34
D32
C18
+
TP6
SW1
RV11
R54
C22
+
R26
C24
+
K2
Y1
R43
C20
+
R17
D7
D37
D29
C35
R27
SW2
R131
C3
RV7
RV2
F1
RV13
D64
C8
R139
D25
R38
U3
SW6
D48
D45
D34
R133
C36
C13
+
VCC
RV5
D65
R69
R20
D44
C33
+
ZONE 2 R61
R96
R15
R128
D14
J7
B NC C NO 2S
R
W Y G 0
R125
RV12
GND
D5
R3
R110
R14
R121
TP4
K4
Y2
D53
24VDC
RV6
R135
R134
D15
R72
D66
C6
+
+
R62
R118
D13
R64
RV9
R100
R9
R75
R105
R95
B0W1
W1
W2GY2Y1
0
RHRC
RC
POWER
R
HEATING COOLING
FAN
ON
VAC
E-HEAT
ZONE
ZONE
ZONE
4
3
2
1
SYSTEM
POWER
U5
TDO
NO PURGE
ANY ZONE HEAT/COOL GAS
PURGE
A C
A
C
B D B D
STAGE MINUTES AUX. MINUTES
A C
45
140
B
D
CL:40 HT:160
#OFZONES
TO STAGE
DAS
SENSOR
Lennox LXZ-4 49M9201
Rev.0
• Install the control panel indoors only. If the
Vacation and/or Emergency Heat switches on the
control panel will be used by the owner, mount in
a location that is readily accessible to the owner.
• Install the control panel in a non-condensing
environment.
• Do not install the control panel in a room where it
will be exposed to elevated humidity levels such
as a laundry room.
• Do not install the control panel directly to
foundation walls, HVAC equipment or ductwork,
where moisture may condense on the enclosure.
• Do not install the control panel in a location where
the temperature will exceed 140°F or will drop
below 32°F.
1. Press in the cover latch on the top of the enclosure
and pull open the cover (see Figure 2).
2. There are six (6) keyholes on the base of the
enclosure. Use the four that are visible with the circuit
board in place.
Cover
Latch
Remove
Screw
6 –Mounting keyholes
(2 located under circuit board)
Flex back board
retainer latches
b. Carefully remove the screws securing the circuit
board to the base.
c. Flex back the latches holding the circuit board
to release.
d. Re-install the circuit board after installing the base.
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.
3. Use #8 screws (field supplied) to install the base.
a. If space limits the use of the outside keyholes, the
circuit board must be removed from the base to
use the two center keyholes.
The above illustration shows a system where three of the
four zones are used.
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.

FIGURE 3 – DISCHARGE AIR SENSOR LOCATION
15"
D/3 W
D
FRONT
Page 4
4. Install and Wire the Discharge Air Temperature Sensor
The tip of the sensor must be located in a region of fully
mixed supply of air before the take-offs (not in a dead
air space) in order for the system to work correctly.
a. Wire discharge air temperature probe to control
center using thermostat wire. Note that the
temperature sensor is not polarity sensitive.
b. Be sure that the tip of the sensor is located at least
15 inches from the top of the indoor coil if using a
furnace, or at least 15 inches from the top of the
electric heat section if using a coil blower. Mount
the sensor in the discharge plenum, 1/3 of the
depth (D/3) of the plenum (D) from the front (the
front is the side with the furnace or CB access
doors), and centered side to side. Move the
adjustable bracket along the length of the
discharge air sensor to achieve proper sensor tip
location (tip of sensor to be located at W ÷2).
The sensor can be mounted from any side of the
plenum, as long as the tip of the sensor is in the
correct position. See Figure 3.
Installation (continued)
IMPORTANT: The discharge air sensor is required.
If a short or open circuit is detected between the
Discharge Air Sensor terminals, the control panel
will only respond to Zone 1 and the dampers will
stay in their normal position.
Sizing the Transformer:
The system requires approximately 10 VA for the
control panel and thermostats and 10 VA for each
damper. The size of the transformer will depend on the
greatest number of dampers that could be energized
at any given time (at least one zone’s dampers will not
be energized during a heating or cooling call when
using power close, spring open dampers). The size of
the transformer must not exceed 75VA. If the value is
greater than 75VA, some dampers will need to be
powered by a separate transformer –refer to Field
Wiring Damper Diagram 2 on page 10.
For instance, if you have 3 dampers, then you would
require 10VA for the system, 20VA (10VA X 2) for the
dampers for a total of 30VA, so catalog number 10P17
would be an adequate transformer size at 40VA.
The transformers listed in this chart include a plate
mount for a 4" square electrical box.
TABLE 1 – TRANSFORMERS
Part Number Size Voltage Description
10P17 40VA 120/208/240V-24V
10P87 50VA 120/208/240V-24V
12P61 75VA 120/208/240V-24V
83P74 4" Square Electrical Box
CAUTION
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
CAUTION
Before attempting to perform any service or
maintenance, turn the electrical power to unit OFF
at disconnect switch.
5. Install the system transformer –DO NOT USE the
HVAC equipment transformer to power the control
panel. Refer to the instructions provided with the
transformer.
18 AWG thermostat wire minimum recommended.

Page 5
Installation (continued)
6. Install the thermostats. Refer to the instructions
provided with the thermostat.
18 AWG thermostat wire minimum recommended.
TABLE 2 – THERMOSTAT REQUIREMENTS
ZONE 1 ZONES 2-4
Recommended Recommended
Type Terminals Thermostats Type Terminals Thermostats
(see Tables 2a & 2b)(see Table 2c) (see Tables 2a & 2b)(see Table 2c)
Any Zone, HEAT/COOL
R, C, W, Y, G 1, 2
HEAT/COOL
R, C, W, Y, G 1, 2
Heat Cool Optional: W2 and Y2 3, 4, 7 Optional: W2 and Y2 3, 4, 7
Zone 1, HEAT/COOL
R, C, W, Y, G, O, B 1, 2
HEAT/COOL
R, C, W, Y, G 1, 2
Heat Cool Optional: W2 and Y2 3, 4, 7 Optional: W2 and Y2 3, 4, 7
Any Zone,
HEAT/COOL
R, C, W, Y, G 1, 2
HEAT/COOL
R, C, W, Y, G 1, 2
Heat Pump,
Optional: W2 and Y2 3, 4, 7 Optional: W2 and Y2 3, 4, 7
Aux Heat Timer > 0
Zone 1, HEAT/COOL
R, C, W, Y, G, O, B 1, 2
HEAT/COOL
R, C, W, Y, G 1, 2
Heat Pump Optional: W2 and Y2 3, 4, 7 Optional: W2 and Y2 3, 4, 7
Any Zone,
Heat Pump, HEAT PUMP
R, C, W1, Y1, G, O 8
HEAT PUMP
R, C, W1, Y1, G, O 8
Electric, Optional: Y2 5, 6 Optional: Y2 5, 6
Aux Heat Timer = 0
Any Zone,
Heat Pump, HEAT PUMP
R, C, W1, Y1, G, O 5, 6
HEAT PUMP
R, C, W1, Y1, G, O 5, 6
Gas, Optional: Y2 5, 6 Optional: Y2 5, 6
Aux Heat Timer = 0
CONTROL PANEL
SET-UP
DIP SWITCH
POSITIONS
Thermostat Selection Guide
The position of the HEAT PUMP / HEAT/COOL switch,
the ZONE 1 / ANY ZONE switch and the AUX.
MINUTES switch (see DIP Switch Settings section) will
determine the thermostat requirements for each zone.
Any 24-volt electronic thermostat with a “C” (24VAC
common) connection can be used. Do not use
mechanical or power robbing thermostats. Power
robbing thermostats can cause unintended operation –
DO NOT use power robbing thermostats. Use Table 2
to determine which thermostat is required:

Page 6
Installation (continued)
TABLE 2c – RECOMMENDED THERMOSTATS
1 SignatureStat 1H/1C Non-Heat Pump (51M26)1
2 Elite 1H/1C Non-Heat Pump (49M55)
3 SignatureStat 2H/2C Non-Heat Pump (51M27)1
4 Elite 2H/2C Non-Heat Pump (49M56)
5 SignatureStat 2H/2C Heat Pump (51M28)1
6 Elite 2H/2C Heat Pump (49M57)
7 T8624D2079 2H/2C Non-Heat Pump (37L61)
8 T8611G2101 2H/1C Heat Pump (37L60)
1 When using the SignatureStat, only the basic
modes of dehumidification and humidification
can be used.
TABLE 2a – HEAT/COOL TERMINAL DEFINITIONS
Thermostat
Terminal Function
R 24 VAC Hot
C 24 VAC Common
W 1st Stage Heat
W2 2nd Stage Heat
Y 1st Stage Cool
Y2 2nd Stage Cool
GFan
O Cooling Mode
B Heating Mode
TABLE 2b – HEAT PUMP TERMINAL DEFINITIONS
Thermostat
Terminal Function
R 24 VAC Hot
C 24 VAC Common
Y1 1st Stage Compressor
Y2 2nd Stage Compressor
W1 Auxiliary Heat
GFan
O Reversing Valve – Cool
B Reversing Valve – Heat
Tables 3-5 on the following pages detail how the zone
panel will respond to specific thermostat input terminals
being energized when set up in different DIP switch
configurations. Refer to the setup flowchart to determine
which DIP switch settings to use with your system.

Page 7
Installation (continued)
TABLE 3 – CONDENSING UNIT AND FURNACE SETUP OPTIONS
Input/ First Stage Second Stage First Stage Second Stage First Stage Second Stage Auxiliary Emergency
Setup1Stat Type output Cool Cool Gas or Electric Gas or Electric Compressor Compressor Heat Heat
Furnace Furnace Heat Heat
Heat/Cool
Panel Y+G Y+2S+G or WW+2S or by –– – –
Gas Heat/Cool Input by Stage Timer Stage Timer
Any Zone Panel Y1+O+G Y1+Y2+O+G W1+B W1+W2+B –– – –
Output
Heat/Cool
Panel Y+O+G Y+2S+O+G or W+B W+B+2S or –– – –
Gas Heat/Cool Input by Stage Timer by Stage Timer
Zone 1 Panel Y1+O+G Y1+Y2+O+G W1+B W1+W2+B –– – –
Output
Heat/Cool
Panel Y+G Y+2S+G or WW+2S or –– – –
Electric Heat/Cool Input by Stage Timer by Stage Timer
Any Zone Panel Y1+O+G Y1+Y2+O+G W1+B+G W1+W2+B+G –– – –
Output
Heat/Cool
Panel Y+O+G Y+2S+O+G or W+B W+B+2S or –– – –
Electric Heat/Cool Input by Stage Timer by Stage Timer
Zone 1 Panel Y1+O+G Y1+Y2+O+G W1+B+G W1+W2+B+G –– – –
Output
TABLE 4 – HEAT PUMP WITH ELECTRIC HEAT SETUP OPTIONS
Input/ First Stage Second Stage First Stage Second Stage First Stage Second Stage Auxiliary Emergency
Setup1Stat Type output Cool Cool Electric Electric Compressor Compressor Heat Heat
Furnace Furnace Heat Heat
Heat Pump Panel Y+O+G Y+2S+O+G or ––Y+G Y+2S+G or by Y+W+G W or by
Electric Heat Input by Stage Timer Stage Timer (+2S if applicable) Emergency Switch
Aux Min = 0 Pump Panel Y1+O+G Y1+Y2+O+G ––Y1+B+G Y1+Y2+B+G Y1+W1+B+G W1+W2+B+G
Any Zone Output (+Y2 if applicable)
Heat Pump Panel Y+O+G Y+2S+O+G or ––W+B W+B+2S or by –By Emergency
Electric Heat/Cool Input by Stage Timer Stage Timer Switch Only
Aux Min = 0 Panel Y1+O+G Y1+Y2+O+G ––Y1+B+G Y1+Y2+B+G –W1+W2+B+G
Zone 1 Output
Heat Pump Panel Y+G Y+2S+G or ––WW+2S or by By Aux Timer By Emergency
Electric Heat/Cool Input by Stage Timer Stage Timer Only Switch Only
Aux Min > 0 Panel Y1+O+G Y1+Y2+O+G ––Y1+B+G Y1+Y2+B+G Y1+W1+B+G W1+W2+B+G
Any Zone Output (+Y2 if applicable)
Heat Pump Panel Y+0+G Y+2S+O+G or ––W+B W+2S+B or By Aux Timer By Emergency
Electric Heat/Cool Input by Stage Timer by Stage Timer Only Switch Only
Aux Min > 0 Panel Y1+O+G Y1+Y2+O+G ––Y1+B+G Y1+Y2+B+G Y1+W1+B+G W1+W2+B+G
Zone 1 Output (+Y2 if applicable)

Page 8
TABLE 5 – HEAT PUMP WITH GAS FURNACE SETUP OPTIONS
Input/ First Stage Second Stage First Stage Second Stage First Stage Second Stage Auxiliary Emergency
Setup1Stat Type output Cool Cool Gas Gas Compressor Compressor Heat Heat
Furnace Furnace Heat Heat
Heat Pump Panel Y+O+G Y+2S+O+G or Y+W+G W or by Y+G Y+2S+G or by ––
Gas Heat Input by Stage Timer (+2S if applicable) Emergency Switch Stage Timer
Aux Min = 0 Pump Panel Y1+O+G Y1+Y2+O+G W1+B W1+W2+B Y1+B+G Y1+Y2+B+G ––
Any Zone Output
Heat Pump Panel Y+O+G Y+2S+O+G or –By Emergency W+B W+B+2S or by ––
Gas Heat/Cool Input by Stage Timer Switch Only Stage Timer
Aux Min = 0 Panel Y1+O+G Y1+Y2+O+G –W1+W2+B Y1+B+G Y1+Y2+B+G ––
Zone 1 Output
Heat Pump Panel Y+G Y+2S+G or By Aux Timer By Emergency WW+2S or by ––
Gas Heat/Cool Input by Stage Timer Only Switch Only Stage Timer
Aux Min > 0 Panel Y1+O+G Y1+Y2+O+G W1+B W1+W2+B Y1+B+G Y1+Y2+B+G ––
Any Zone Output
Heat Pump Panel Y1+0+G Y+2S+O+G or By Aux Timer By Emergency W+B W+B+2S or ––
Gas Heat/Cool Input by Stage Timer Only Switch Only by Stage Timer
Aux Min > 0 Panel Y1+O+G Y1+Y2+O+G W1+B W1+W2+B Y1+B+G Y1+Y2+B+G ––
Zone 1 Output
Installation (continued)
1These charts apply when the # of Zones to Stage DIP switch is set to 1. If the Zone to Stage switch is set to greater than 1, the second stage
conditioning will only be brought on if the number of zones calling for the same conditioning call is greater than or equal to the DIP switch setting.

Page 9
Installation (continued)
Bypass Damper Sizing
7. Install the dampers. Power close, spring open
dampers are preferred. Refer to the instructions
provided with the damper.
18 AWG thermostat wire minimum recommended.
8. Re-install the cover on the base.
When fewer than the maximum number of zones are
calling for heating or cooling, an excess volume of air is
delivered, and because of the excess air, an excess
amount of static pressure is produced as well. Zone
systems often require a bypass duct to relieve this
pressure. A properly sized barometric bypass damper
must be installed in the bypass duct which is run
between the supply and return air duct systems (see
Figure 4). The barometric damper and the bypass duct
must be sized to accommodate the excess static
pressure from the supply duct.
The bypass tap in the return air duct must be at least 6
ft. from the furnace /air handler to ensure that the hot or
cold air coming off of the plenum has time to mix with
the return air before it passes through the air handler
again. The provided discharge air sensor (field installed)
protects the equipment from overheating or coil
freeze-up by interrupting the HVAC equipment.
The bypass damper and duct should be sized to handle
the excess pressure created when the smallest zone is
operating alone (worst case). To size the bypass
damper, subtract the total air volume capacity of the
smallest zone from the total air volume of the system.
Example:
Total System air volume: 2000 cfm
Air volume of smallest zone: 600 cfm
Bypass requirement: 2000 - 600 = 1400 cfm
In this example, the bypass duct should be sized to
handle the 1400 cfm excess pressure created when
only the smallest zone has a demand. For bypass
damper air volume capacities, see Table 6.
Refer to the parts and supplies catalog for information
on available barometric bypass dampers.
FIGURE 4 – BYPASS DAMPER INSTALLATION
TRANSFORMER
FOR
PANEL, DAMPERS
AND THERMOSTATS
ZONE
DAMPER
ZONE 2 ZONE 1
ZONE 3 ZONE 4
ZONE 4
THERMOSTAT
ZONE 1
THERMOSTAT
ZONE 3
THERMOSTAT
ZONE 2
THERMOSTAT
HEATING/
COOLING
UNIT
CONTROL
PA N E L
SUPPLY
AIR
RETURN
AIR
ZONE
DAMPER
ZONE
DAMPER
ZONE
DAMPER
DISCHARGE
AIR SENSOR
BYPASS DUCT
BYPASS
DAMPER
6 ft. 1.8 m)
TABLE 6
Round Rectangular
8 in. dia. –400 cfm 12 x 8 –1000 cfm
10 in. dia. –750 cfm 12 x 10 –1200 cfm
12 in. dia. –1200 cfm 12 x 12 –1400 cfm
14 in. dia. –1800 cfm 20 x 8 –1600 cfm
16 in. dia. –2400 cfm 20 x 10 –2000 cfm
20 x 12 –3000 cfm
IMPORTANT: Bypass duct should be mounted as far away
from the heating cooling unit as possible to allow for a
better mix of the bypass air with the return air.

Page 10
Field Wiring – Dampers
DIAGRAM 1 – POWER CLOSE/SPRING OPEN
DAMPER WIRING
DIAGRAM 2 – DAMPER WIRING WITH
SEPARATE TRANSFORMER
Field Wiring – Thermostats
DIAGRAM 3 – HEAT/COOL THERMOSTAT WITHOUT O AND B TERMINALS
DIAGRAM 4 – HEAT/COOL THERMOSTAT WITH O AND B TERMINALS

Page 11
Field Wiring – Thermostats (continued)
DIAGRAM 5 – HEAT PUMP THERMOSTAT
DIAGRAM 6 – HEAT PUMP THERMOSTAT SignatureStat (51M28) AND ELITE (49M57)
DIAGRAM 7 – HEAT PUMP THERMOSTAT SignatureStat (51M28) AND ELITE (49M57) DUAL FUEL

Page 12
Field Wiring – HVAC Equipment: Furnace and Air Conditioner
DIAGRAM 8 – SINGLE STAGE FURNACE AND AIR CONDITIONER
DIAGRAM 9 – TWO-STAGE FURNACE AND TWO-STAGE AIR CONDITIONER

Page 13
Field Wiring – HVAC Equipment: Heat Pumps
DIAGRAM 10 – SINGLE STAGE HEAT PUMP
DIAGRAM 11 – TWO-STAGE HEAT PUMP

Page 14
Field Wiring – HVAC Equipment: Heat Pumps (continued)
DIAGRAM 12 – TWO-STAGE HEAT PUMP WITH DUAL FUEL

Page 15
Dip Switch Settings
# ZONES TO STAGE: If staging
thermostats are not installed with
the system, second stage (does
not apply to auxiliary heat on heat
pump applications) operation can be initiated when
more than one zone is calling for conditioning. Four
selections are available: one, two, three and four zones.
Set to one, thermostat inputs or timed length of call
control staging, for all other settings only the specified
number of calling zones can trigger staging.
SWITCHES ARE SHOWN AS BLACK.
DAS SENSOR CL-45/40: This
switch controls the temperature
at which the cooling equipment
will cut out to prevent freezing
the indoor coil. For a low limit temperature of 45°F,
leave the switch in the ON position (45). For a low limit
temperature of 40°F, move the switch to the OFF
position (CL-40).
The panel factory default is 45. Do not set this limit to
40 unless equipment issues develop requiring a lower
temperature.
DAS SENSOR HT-140/160: This switch controls the
temperature at which the heating equipment will cut out
to prevent overheating. Set the high limit temperature that
is appropriate for the equipment being used. The factory
default is 160, use this option for gas heat. When using
heat pumps and electric heat, set this switch to 140. For
a high limit temperature of 140°F, move the switch to
the ON position (140). For a high limit temperature of
160°F, leave the switch in the OFF position (HT-160).
IMPORTANT: The discharge air temperature sensor
is required. If a short or open circuit is detected
between the Discharge Air Sensor (DAS) terminals,
the control panel will only respond to Zone 1 and the
dampers will not close.
STAGE MINUTES: If staging
thermostats are not installed and
the # Zones to Stage is set to 1,
staging can be controlled by the
amount of time that any one zone must be calling for
conditioning before initiating a second stage of heating
or cooling (heat/cool systems) or second stage
compressor (heat pump systems). Four selections are
available: 0, 10, 30 and 60 minutes. Set to zero,
thermostat inputs or “# of Zones Calling”control
staging. SWITCHES ARE SHOWN AS BLACK.
AUX. MINUTES: With the control
panel configured for ZONE 1
operation, auxiliary heat can only
be controlled by time. Configured
for ANY ZONE operation, auxiliary heat can be
controlled by time or by individual thermostats. For
thermostat control of auxiliary heat, set all AUX.
MINUTES switches to the OFF position and refer to the
sequence of operation sections on the following pages
for details. For timed control, set the AUX. MINUTES
switches to the amount of time the first and second
stage (where applicable) compressors are allowed to try
and satisfy a call for heating before auxiliary heat will be
activated. There are four selections available: 0, 10, 30
and 60 minutes. Set to zero, auxiliary heat can be
controlled by the thermostat only. SWITCHES ARE
SHOWN AS BLACK.
ZONE 1/ANY ZONE: This
switch determines how the
control panel will control the
mode of operation. In the
ZONE 1 configuration, Zone
1 sets the mode of operation through the use of the O
and B thermostat inputs. When the Zone 1 O terminal is
energized, the system is in the cool mode and only cool
calls will be satisfied. When the Zone 1 B terminal is
energized, the system is in heat mode and only heat
calls will be satisfied. If neither the Zone 1 O nor B
terminal is energized, the system will not respond to
cool or heat calls, but fan operation is unaffected. This
configuration offers restricted control and is likely to be
used in applications where mode control from Zone 1
is desired. In the ANY ZONE configuration, the control
panel responds to each individual thermostat equally.
One zone can call for cooling and another zone can call
for heat. The system will respond to both needs,
although it can not heat and cool at the same time. This
offers control flexibility and is likely to be used in
applications where the heating and cooling needs of the
zones are completely independent. TALK WITH THE
CUSTOMER TO DETERMINE WHICH CONTROL
CONFIGURATION SHOULD BE USED. Refer to the
Sequence of Operation section on the following pages
for additional details.
Factory Settings
Factory Settings
Factory Settings
Factory Settings
Factory Settings

Page 16
Dip Switch Settings (continued)
HEAT PUMP or HEAT/COOL: Sets the control for the
heating and cooling system equipment. If a heat pump
is to be used, set the switch to the ON position. When
different equipment is used for heating and cooling
(i.e. furnace and air conditioner), set the switch to the
OFF position.
ELECTRIC/ GAS: If electric heat is to be used, set the
switch to the ON position. This will turn on the fan (G
output terminal) with a heat call (W1 output terminal). If
the switch is left in the OFF position, it is assumed that
the heating equipment will control the fan operation. For
Dual Fuel Heat Pump systems, leave this switch in the
GAS position.
NO PURGE / PURGE: If the NO PURGE/PURGE switch
is set to PURGE, the G terminal will remain energized
for a one minute purge delay following the completion of
a compressor call. If the NO PURGE/PURGE switch is
set to NO PURGE, the G terminal will de-energize
immediately following the completion of a compressor
call. The NO PURGE setting is designed for use with
systems where the furnace or air handler has a built in
fan purge. The following chart details the zone panel fan
output and damper hold times when a heating or
cooling call is satisfied:
Purge No Purge
Dip Switch Settings Mode Output Damper Hold Time Output Damper Hold Time
Heat/Cool, Gas Cooling G11 minute No G, 3-1/2 minutes
Heating No G 1 minute No G, 3-1/2 minutes
Heat Pump, Gas Compressor Cool or Heat G11 minute No G, 3-1/2 minutes
Auxiliary Heat No G 1 minute No G, 3-1/2 minutes
Heat Pump or Cooling G11 minute No G, 3-1/2 minutes
Heat/Cool, Elect. Heating G11 minute No G, 3-1/2 minutes
ZONE/VAC (VACATION) SELECTOR: This switch
allows the homeowner to switch from normal operation
(ZONE) to a VACATION mode. In VACATION mode
(switch in the ON position), Zone 1 becomes the only
zone from which a call for heating or cooling is
recognized. Additionally, when in Vacation mode,
damper outputs do not change –they remain in the
open position. The Vacation LED will illuminate when
the switch is in the VACATION position.
E-HEAT SELECTOR: This feature can only be used
with heat pump systems. When the EMERGENCY
HEAT switch is in the ON position, any call for heat will
be answered with auxiliary heat equipment outputs (W1
and W2). This feature enables the homeowner to
activate the Emergency Heat mode when heat/cool
thermostats are installed in all zones.
LEDs
POWER –Blinks during normal operation. Starts to
blink appoximately 6 seconds after power up.
HEAT –Lights when equipment heating outputs are
energized (LEDs next to equipment terminals show
which outputs are on). This output will flash if the
heating high temperature limit has been reached. If this
LED is flashing while the cooling LED is on or flashing,
then this indicates an open or short circuit in the DAS.
COOL –Lights when equipment cooling outputs are
energized (LEDs next to equipment terminals show
which outputs are on). This output will flash if the
cooling low temperature limit has been reached. If this
LED is flashing while the heating LED is on or flashing,
then this indicates an open or short circuit in the DAS.
FAN ON –Lights when equipment G terminal
is energized.
VAC –Lights when ZONE/VAC switch is in
VAC position.
E-HEAT –Lights when E-HEAT switch is ON.
ZONE 1 to ZONE 4 –Lights when the Normally Open
(NO) damper terminal for that zone is energized
(i.e. LEDs show which zones are NOT calling when the
HVAC equipment is operating).
1The G terminal will remain energized for 1 minute.

Page 17
Sequence of Operation
When power is first applied, the green system power
led will remain off for approximately 6 seconds. After
6 seconds, this LED will begin to flash indicating that
the board is working normally. Note that immediately
after the board is powered, there is a four minute
minimum off delay during which only the fan output
will respond.
When operating in the Heat mode, the heating
equipment will not stop operating until all heat calls
have been satisfied. Any existing cooling calls will then
be satisfied. Equipment operation is only interrupted if
an Emergency Heat call (heat pump applications only)
exists or if an opposing mode call from another zone
exists for 20 minutes. Similarly, cooling calls will be
satisfied until all calls for cooling end or an opposing
call from another zone exists for 20 minutes. The
sequence of operation is dependent on the position of
the ZONE 1 or ANY ZONE switch and the HEAT PUMP
or HEAT/COOL switch. A Time Delay Override (TDO)
button is available on the control panel to speed up the
internal timer by a factor of 60 for system checkout.
Heat/Cool Changeover: When a call for heating or
cooling exists and an opposing call is made from
another zone, a 20 minute timer is activated. If the
original call is not satisfied within that 20-minute time
period, the call will be interrupted, turning the equipment
off and allowing for the normal fan purge cycle and
minimum equipment off time. The opposing call will then
be answered. After 20 minutes, if the original call still
exists, the opposing call will be interrupted and the
original call can once again be recognized.
High/Low Limit Temperature: The high/low limit
temperature settings are designed to prevent the heat
exchanger from overheating or the cooling coil from
freezing. The temperature sensor in the supply duct
senses the discharge air temperature and interrupts the
heating/cooling equipment (depending on the Heat and
Cool temperatures set on the control panel) before
overheating/freezing occurs. When a heating/cooling
call is interrupted by the high/low temperature limit, the
zone control panel turns the equipment off and
energizes the G terminal (if not already energized). The
Heating/Cooling LED on the control panel will flash
during a high/low limit temperature interrupt. Once the
temperature drops/rises 10°F, the equipment is turned
back on if the call for conditioning still exists, and the
Heating/Cooling LED will stop flashing.
DAMPER OPERATION
The “NO”output will be energized and the “NC”output
will be de-energized for any zone not calling for heating
or cooling while the equipment output is energized and
during the damper purge time delay. During equipment
operation or during the damper purge time delay,
should all zones stop calling for heating or cooling, the
damper terminals will remain in the position they were
in before all zones stopped calling.
Damper Purge Time Delay
When the PURGE/NO PURGE Selector is set to NO
PURGE, the damper purge time delay is 3.5 minutes
and begins when the equipment output(s) turn off.
NO PURGE is the preferred method of purge control
for Lennox furnaces and air conditioners. When the
PURGE/NO PURGE Selector is set to PURGE, the
damper purge time delay is one (1) minute.
CONTINUOUS FAN OPERATION
A call for Fan from any zone will initiate the G
equipment output terminal. The normally open (NO)
damper terminal at all zones not calling for continuous
fan will be energized.
HEATING AND COOLING EQUIPMENT OPERATION
COOLING OPERATION
When a zone makes a call for Cooling, the Y1, G and O
terminals will energize. The Y1 terminal de-energizes when
(1) all zones stop calling for Cooling, (2) the call has
exceeded the heat/cool changeover time limit while a heat
call exists or (3) the call is interrupted by the low limit
temperature setting. When the Y1 terminal is de-energized,
a minimum off time delay of 4 minutes must elapse before
it can be energized again. Should any call for Cooling not
be satisfied in the time that is set on the STAGE dip switch
bank, or should the “2S”terminal of any calling zone be
energized, or should the number of zones calling for
conditioning be greater or equal to the # Zones to Stage
setting, the Y2 terminal will energize. For greater detail on
how the system configuration DIP switch positions affect
staging, see the system setup flowchart starting on page
20. When none of the conditions that initiated the Y2
terminal are present, the Y2 terminal will de-energize.
Once de-energized, the Y2 terminal can not be energized
again until a 4-minute minimum off time delay elapses. The
O terminal remains energized until there is a Heat call.
Fan Purge Time Delay
If the PURGE/NO PURGE jumper is in the PURGE
position, the G terminal will remain energized for one
minute after the Y1 (and Y2) terminal is de-energized.
If the jumper is in the NO PURGE position, the
G terminal will de-energize immediately.
IMPORTANT: Should a short or open circuit be
detected across the Discharge Air Sensor (DAS)
terminals, the zone system will respond only to
Zone 1 and the dampers will not energize.

Page 18
Sequence of Operation (continued)
HEATING OPERATION – HEAT/COOL SYSTEMS
When a zone makes a call for Heat, the W1 and B
output terminals will energize. The G terminal will also
energize if the ELECTRIC/GAS switch is in the
ELECTRIC position. The W1 terminal de-energizes
when (1) all zones stop calling for Heat, (2) the call has
exceeded the heat/cool changeover time limit while a
cooling call exists or (3) the call is interrupted by the
high limit setting. When the W1 terminal is de-
energized, a minimum off time delay of 4 minutes must
elapse before it can be energized again. Should any call
for Heat not be satisfied in the time that is set on the
STAGE dip switch bank, or should the “2S” terminal of
any calling zone be energized, or the number of zones
calling for conditioning matches or exceeds the # Zones
to stage setting, the W2 terminal will energize in
addition to the W1 terminal. For greater detail on how
the system configuration DIP switch positions affect
staging, see the system setup flowchart starting on
page 20. When none of the conditions that initiate the
W2 terminal are present, the W2 terminal will
de-energize. Once de-energized, the W2 terminal has
a 4 minute minimum off time. The B terminal remains
energized until there is a Cool call.
Fan Purge Time Delay
If the ELECTRIC/GAS selector is in the ELECT
position and the PURGE/NO PURGE selector is in
the PURGE position, the G terminal will remain
energized for one minute after the W terminal is de-
energized. The NO PURGE setting is the preferred
purge control setting for Lennox equipment. Lennox
equipment includes controls which sequence the
indoor fan off after a call for heat has been satisfied.
If the ELEC/GAS selector is in the GAS position, the
G terminal does not turn on during purge regardless
of the position of the PURGE or NO PURGE selector.
Lennox furnaces will control the purge though the
furnace control board cool down feature. The cool
down time is often adjustable at the furnace control
board up to 3.5 minutes. NO PURGE is the preferred
method of purge when this zone panel is applied to
Lennox equipment.
HEATING OPERATION – HEAT PUMP SYSTEMS
When a zone makes a call for Heat, the Y1, G and B
output terminals will energize. The Y1 terminal de-
energizes when (1) all zones stop calling for Heat, (2)
the call has exceeded the heat/cool changeover time
limit while a cooling call exists or (3) the call is
interrupted by the high limit setting. When the Y1
terminal is de-energized, a minimum off time delay of 4
minutes must elapse before it can be energized again.
Should any call for Heat not be satisfied in the time that
is set on the STAGE dip switch bank, or should the “2S”
terminal of any calling zone be energized, or should the
number of zones calling for heat match or exceed the #
Zones to Stage setting, the Y2 terminal will energize.
For greater detail on how the system configuration DIP
switches positions affect staging, see the system setup
flowchart starting on page 20. When none of the
conditions that initiate the Y2 terminal are present, the
Y2 terminal will de-energize. Once de-energized, the Y2
terminal can not be energized again until a 4-minute
minimum off time delay elapses. The B terminal remains
energized until there is a Cool call.
AUXILIARY HEAT OPERATION –
HEAT PUMP SYSTEMS
Auxiliary Heat can be controlled by time or by the
thermostats.
Thermostat Control (Heat Pump thermostats in all
zones): If the Y and W thermostat input terminals at
any zone are energized concurrently (assuming the
heat pump is on in the Heat mode of operation), the W1
output terminal will energize immediately. This is
thermostat control.
Time Control (Heat/Cool thermostats in all zones): If
it is desired to have the auxiliary heat come on after a
specific amount of time, set the appropriate AUX
switch(es) to ON. Should any call for Heat exist longer
than the time that is set on the STAGE MINUTES plus
the AUX MINUTES dip switch bank, the W1 equipment
output terminal energizes. (NOTE: When using time
controlled auxiliary heat, DO NOT USE heat pump
thermostats, heat / cool thermostats must be used
when staging the auxiliary heat by time.)
The W1 terminal immediately de-energizes when both
of the above two conditions no longer exist.

Page 19
Sequence of Operation (continued)
Fan Purge Time Delay
After the Y1, Y2 and/or W1 terminals turn off, the G
terminal, if the ELEC/GAS switch is in the ELEC
position, will remain on for one (1) minute if the
PURGE/No Purge switch is set to Purge. The G
terminal will immediately turn off, if on, when the
switch set to No Purge.
Dual Fuel
Your control panel acts as a dual fuel system when
the HEAT PUMP/HEAT COOL switch is set to the
HEAT PUMP position and the ELECTRIC/GAS switch
is set to the GAS position. The dual fuel system is set
up so that when the auxiliary heat comes on, the
compressor outputs (Y1 and Y2) turn off before the
W1 output is turned on. The dual fuel mode effects
auxiliary heat operation only.
To lock out the heat pump at low ambient conditions
(below the system balance point) and service heat
calls with the furnace, use the SignatureStat or Elite
heat pump dual fuel compatible thermostats with
outdoor temperature sensors on all thermostats (see
thermostat selection guide on page 5). Each
thermostat must have its own outdoor temperature
sensor. To set the SignatureStat or Elite stat to use
the balance points for dual fuel control, in the
thermostats menu go to: menu, installer settings,
system setup, add on –comp = off. When the
thermostat is properly set up, it will send the
appropriate signals to the LZP-4. When the outdoor
temperature is between the low and high balance
points, first stage heating demands are serviced
through the heat pump and second stage heating
demands are serviced through the gas furnace.
Below the low balance point, all heat demands are
serviced though the gas furnace. Above the high
balance point, all heating demands are serviced with
the heat pump. If using a two-stage furnace with a
dual fuel application, set the furnace to stage on its
own (W2 timed); do not connect W2 from the LZP-4
to W2 on the furnace control board. If both W1 and
W2 are connected between the zone panel and the
furnace, only second stage furnace will be used
when servicing a gas heat call.
If you choose not to use the SignatureStat or Elite
thermostats dual fuel feature or wish to use a
standard heat pump thermostat to control the dual
fuel system, the furnace will turn on with an auxiliary
heat call after the condensing unit stops regardless of
the outdoor temperature. This auxiliary heat call will
be serviced with a W1 furnace call, and an
emergency call will be serviced with a W1+W2
furnace call. See Table 5 on page 8 for detailed
thermostat call and equipment output information.
EMERGENCY HEAT OPERATION –
HEAT PUMP SYSTEMS
There is no Emergency Heat operation when the HEAT
PUMP or HEAT/COOL switch is set for HEAT/COOL.
When set for HEAT PUMP operation, an Emergency
Heat call is recognized by a thermostat calling explicitly
for Emergency Heat or by a zone calling for heat with
the E-HEAT SELECTOR switch set to Emergency Heat.
A thermostat can explicitly call for Emergency Heat only
when the Zone 1 or Any Zone Selector switch is in the
Any Zone position and the Auxiliary Heat Timer DIP
switches are set to zero, which requires the use of heat
pump thermostats in all zones.
When a call for Emergency Heat is recognized, the
Y terminal will de-energize (if energized), after which
the B and W terminals (and G terminal if set to
ELECTRIC) will energize. Immediately, the W terminal
will de-energize when (1) all zones stop calling for
emergency heat, (2) the call has exceeded the
heat/cool changeover time limit while a cooling call
exists or (3) the call is interrupted by the high limit
setting. When the W terminal is de-energized, it has a
4 minute minimum off time if set to GAS or no minimum
off time if set to ELECTRIC.
Fan Purge Time Delay
After the W1 and W2 terminals turn off, the G
terminal, if the ELEC/GAS switch is in the ELEC
position, will remain on for one (1) minute if the
PURGE or No Purge Selector switch is set to Purge.
The G terminal will immediately turn off, if on, when
the switch set to No Purge.
With the ELEC/GAS switch in the GAS position, the
G terminal is not turned on during purge regardless
of the position of the PURGE/NO PURGE switch.
To aid in setting the system configuration DIP switches
correctly, use the system setup flowcharts on the
following pages.

Page 20
System Setup Flowchart