Lennox International Inc LZP-2, Zone Control Panel Thermostat Requirements, Heat/Cool

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Installation (continued)

5.Install the required transformer selected from Table 1

– 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.

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 6.

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.

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

 

 

 

The transformers listed in this chart include a plate mount for a 4" square electrical box.

6.Install the thermostats. Refer to the instructions provided with the thermostat.

Any 24-volt electronic thermostat with a “C” (24 VAC common) terminal can be used. Power robbing thermostats can cause unintended operation – DO NOT use mechanical or power robbing thermostats. Table 2 lists the required terminals and recommended Lennox thermostats:

18 AWG thermostat wire minimum recommended.

TABLE 2 – THERMOSTAT REQUIREMENTS

Type

Terminals

Recommended

Thermostat

 

 

 

 

 

 

 

• SignatureStat 1H/1C

HEAT/COOL

R, C, W, Y, G

(51M26)

 

 

• Elite 1H/1C (49M55)

 

 

 

Thermostat Terminal

Function

 

 

R

24 VAC Hot

 

 

C

24 VAC Common

 

 

W

Heat

 

 

Y

Cool

 

 

G

Fan

 

 

7.Install the dampers. Refer to the instructions provided with the damper.

18 AWG thermostat wire minimum recommended.

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Contents Shipping & Packing List Package 1 of 1 contains the followingRequired Components ordered separately TransformersInstallation FeaturesApplication Discharge AIR Sensor Location Thermostat Requirements HEAT/COOLExample Bypass Damper SizingRound Rectangular Field Wiring Pin Jumper Settings see Figure LEDsSequence of Operation Heating and Cooling Equipment OperationHeating Operation Cooling OperationContinuous FAN Operation Damper OperationDetecting Hvac System Problems TroubleshootingSymptom Possible Solution Detecting HEATING, Cooling and FAN Problems Detecting Damper Problems Checking Thermostat VoltagesDischarge AIR Sensor Checkout Resistance ohms
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Zone Control Panel, LZP-2 specifications

Lennox International Inc, a leader in the HVAC industry, has made significant strides in advancing climate control technologies, particularly with their innovative HVAC Zone Control System, designated LZP-2. This system is designed to provide enhanced comfort and energy efficiency in residential and commercial settings by allowing for precise temperature control across different zones within a building.

One of the main features of the LZP-2 HVAC Zone Control System is its ability to operate multiple zones independently. This zoning capability means that different rooms or areas can be set to different temperatures based on usage patterns or individual preferences. Homeowners can enjoy a cooler environment in living spaces while maintaining a warmer temperature in less frequently used zones, such as guest rooms or basements. This tailored approach not only improves comfort but also leads to significant energy savings.

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