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Lennox LZP-4 Installation Instructions Manual

Lennox LZP-4 Installation Instructions Manual

Zone control panel
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© 2004 Lennox Industries Inc.
Dallas, Texas, USA
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.
TABLE 1 – TRANSFORMERS
Part Number
Size
10P17
40VA
10P87
50VA
12P61
75VA
83P74
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.
ZONING SYSTEM
504,927M
5/2004
Voltage Description
120/208/240V-24V
120/208/240V-24V
120/208/240V-24V
4" Square Electrical Box
ZONE CONTROL PANEL
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
Page 1
Litho U.S.A.
LZP-4

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Summary of Contents for Lennox LZP-4

  • Page 1 504,927M Dallas, Texas, USA 5/2004 ZONE CONTROL PANEL INSTALLATION INSTRUCTIONS FOR ZONE CONTROL PANELS USED WITH LENNOX HEATING AND COOLING EQUIPMENT Shipping & Packing List Application Package 1 of 1 contains the following: • Up to four zones (1) Model LZP-4 Zone Control Panel •...
  • Page 2 FIGURE 1 – LZP-4 CONTROL PANEL SCHEMATIC Page 2...
  • Page 3: Installation

    WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation Lennox LXZ-4 49M9201 Rev. 0 and service must be performed by a qualified installer, service agency or the gas supplier. • Install the control panel indoors only. If the...
  • Page 4 Installation (continued) 4. Install and Wire the Discharge Air Temperature Sensor CAUTION As with any mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment. 15" CAUTION Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch.
  • Page 5 Installation (continued) 6. Install the thermostats. Refer to the instructions Thermostat Selection Guide provided with the thermostat. The position of the HEAT PUMP / HEAT/COOL switch, 18 AWG thermostat wire minimum recommended. the ZONE 1 / ANY ZONE switch and the AUX. MINUTES switch (see DIP Switch Settings section) will determine the thermostat requirements for each zone.
  • Page 6 Installation (continued) Tables 3 - 5 on the following pages detail how the zone TABLE 2a – HEAT/COOL TERMINAL DEFINITIONS panel will respond to specific thermostat input terminals being energized when set up in different DIP switch Thermostat configurations. Refer to the setup flowchart to determine Terminal Function which DIP switch settings to use with your system.
  • Page 7 Installation (continued) Page 7...
  • Page 8 Installation (continued) Page 8...
  • Page 9 Installation (continued) 7. Install the dampers. Power close, spring open 8. Re-install the cover on the base. dampers are preferred. Refer to the instructions provided with the damper. 18 AWG thermostat wire minimum recommended. Bypass Damper Sizing When fewer than the maximum number of zones are Example: calling for heating or cooling, an excess volume of air is Total System air volume: 2000 cfm...
  • Page 10 Field Wiring – Dampers DIAGRAM 1 – POWER CLOSE/SPRING OPEN DIAGRAM 2 – DAMPER WIRING WITH DAMPER WIRING 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 10...
  • 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 11...
  • 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 12...
  • Page 13 Field Wiring – HVAC Equipment: Heat Pumps DIAGRAM 10 – SINGLE STAGE HEAT PUMP DIAGRAM 11 – TWO-STAGE HEAT PUMP Page 13...
  • Page 14 Field Wiring – HVAC Equipment: Heat Pumps (continued) DIAGRAM 12 – TWO-STAGE HEAT PUMP WITH DUAL FUEL Page 14...
  • Page 15: Dip Switch Settings

    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 Factory Settings pump applications) operation can be initiated when more than one zone is calling for conditioning. Four AUX.
  • Page 16 Dip Switch Settings (continued) ZONE/VAC (VACATION) SELECTOR: This switch HEAT PUMP or HEAT/COOL: Sets the control for the allows the homeowner to switch from normal operation heating and cooling system equipment. If a heat pump (ZONE) to a VACATION mode. In VACATION mode is to be used, set the switch to the ON position.
  • Page 17: Sequence Of Operation

    NO PURGE is the preferred method of purge control call from another zone exists for 20 minutes. The for Lennox furnaces and air conditioners. When the sequence of operation is dependent on the position of PURGE/NO PURGE Selector is set to PURGE, the the ZONE 1 or ANY ZONE switch and the HEAT PUMP damper purge time delay is one (1) minute.
  • Page 18 PURGE or NO PURGE selector. switch(es) to ON. Should any call for Heat exist longer Lennox furnaces will control the purge though the than the time that is set on the STAGE MINUTES plus furnace control board cool down feature. The cool...
  • Page 19 (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.
  • Page 20: System Setup Flowchart

    System Setup Flowchart Page 20...
  • Page 21 System Setup Flowchart (continued) Page 21...
  • Page 22 System Setup Flowchart (continued) Page 22...
  • Page 23 System Setup Flowchart (continued) Page 23...
  • Page 24 System Setup Flowchart (continued) Page 24...
  • Page 25 System Setup Flowchart (continued) Page 25...
  • Page 26: Troubleshooting

    Troubleshooting DETECTING HVAC SYSTEM PROBLEMS Symptom Possible Solution Pressure switch open. Consult condensing unit manual for possible cause. Compressor is off due to internal overload protector. Consult condensing unit manual for possible cause. Condensing unit receiving signal but will not turn on. Condenser control board anti short cycle timer is not yet expired.
  • Page 27 Troubleshooting (continued) DETECTING HEATING, COOLING AND FAN PROBLEMS (continued) Symptom Possible Solution Single transformer system. Install jumper between RC and RH at HVAC equipment outputs of control panel. Thermostat is not calling for cooling. Check voltage at the thermostat Y input on the control panel. Thermostat could be invoking a timed off delay.
  • Page 28 Troubleshooting (continued) DETECTING HEATING, COOLING AND FAN PROBLEMS (continued) Symptom Possible Solution Discharge air temperature exceeds set limit. Fan is running but no heat and the HEAT LED is Allow discharge air to cool 10° below set limit and blinking. Dampers reposition while the fan is on. allow timed off delay to expire.