Lennox Zone Control Panel - Manual
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Table of Contents:
- Page 2 – Application; stages on it’s own internal controls; Installation; Remove the cover. Replace the cover when; Features; CAUTION; Slots; WARNING
- Page 3 – FIGURE 3 – DISCHARGE AIR SENSOR LOCATION; FRONT; Figure 3
- Page 5 – Bypass Damper Sizing; ). The barometric damper and the bypass duct
- Page 6 – Field Wiring; DIAGRAM 1 – FIELD WIRING
- Page 7 – LEDs
- Page 8 – Cooling Operation; Fan Purge Time Delay; Sequence of Operation
- Page 9 – Damper Purge Time Delay; No Purge; , the damper purge time delay is
- Page 10 – Troubleshooting; DETECTING HVAC SYSTEM PROBLEMS
Page 1
© 2004 Lennox Industries Inc.
Dallas, Texas, USA
Litho U.S.A.
504,926M
5/2004
LZP-2
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-2 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 thermostats 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 power closed/spring open dampers
are used, at least one zone’s dampers will not be
energized during a call for heating or cooling.
Thermostats
– single-stage, electronic, 24-volt
heat/cool thermostats which include a “C”
(24VAC common) terminal. Do not use mechanical
or power robbing thermostats.
Dampers
– 2 or 3-wire, 24-volt dampers required.
2-wire, power closed/spring open preferred.
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
FIGURE 1 – LENNOX
®
MODEL LZP-2 CONTROL PANEL LAYOUT
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Summary
Page 2 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 th...
Page 3 Installation (continued) FIGURE 3 – DISCHARGE AIR SENSOR LOCATION 15" D/3 W D FRONT IMPORTANT: The discharge air sensor is required. If a short or open circuit is detected between thePlenum Sensor terminals, the control panel will onlyrespond to Zone 1 and the dampers will stay in theopen...
Page 5 Bypass Damper Sizing When fewer than the maximum number of zones arecalling for heating or cooling, an excess volume of air isdelivered, and because of the excess air, an excessamount of static pressure is produced as well. Zonesystems often require a bypass duct to relieve thispressure. A pr...
