LENNOX Commercial Rooftop Unit User Guide
- June 12, 2024
- Lennox
Table of Contents
LENNOX Commercial Rooftop Unit User Guide
Siemens Setup and Configuration Guide
Applies to Lennox Rooftop using a Siemens Climatix ECO Economizer Controller
Follow the steps below to setup the siemens controller manually.
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From the default HMI screen, press and hold Enter + Up. The 5CONFIG STATE screen displays.
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Press enter, and then confirm the switch by pressing enter again. Blocks can be changed by pressing and holding Enter + Up or Down. Parameters can be changed by pressing enter and using the arrows to adjust. Confirm the switch by pressing enter again.
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Configure I/Os. See below for notable parameters.
Parameter| Configure As| Description
---|---|---
6OCC| Always/T-stat| Occupancy comes from controller or OC terminal
6OAT SIG| NTC10K| Configures signal type of OAT sensor
6OAH SIG| 0-10V| Configures signal type of OAH sensor
6RAH SIG| 0-10V| Configures signal type of RAH sensor
6MAT SIG| NTC10K| Configures signal type of MAT or LAT -
If configurations are done, press and hold Enter + Up or Down to switch to the 8RUN STATE screen, then press Enter twice to go back to Running State. The 1FREECOOL screen displays.
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Verify status parameters. See below for notable parameters.
Parameter| Description
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1FREECOOL| Indicates if the system can use outdoor air for free cooling
1ECON ENAB| Indicates if outdoor air is being used for the 1st stage of cooling
1OCCUPIED| Indicates if the space is occupied- Controller needs to be in the occupied state
1Y1-IN| Y1-In call from thermostat for Cooling Stage 1
1Y1-OUT| Y1-Out signal to compressor for Cooling Stage -
Configure basic settings. See below for notable parameters.
Parameter| Configure As| Description
---|---|---
2TEMP OFF| 55°F (12.8°C)| Temperature shutoff setpoint
2ENTH OFF| 22 Btu/lbm| Enthalpy shutoff setpoint
2FAN L ACT| 2.8V| Minimum position at low speed
2FAN H ACT| 3.6V| Minimum position at high speed
Damper Position – 2V = 0% 6V = 50% 10V = 100%
- Configure advanced settings. See below for notable parameters.
Parameter| Configure As| Description
---|---|---
3FREEZE POS| CLO| Anti-freeze protection damper position
3MAT SET| 53°F (11.7°C)| Setpoint of MAT or LAT sensor
3FRZ PROT| 45°F (7.2°C)| Anti-freeze protection setpoint of MAT sensor
3OAT LOCK| 32°F (0°C)| OAT lockout setpoint for anti-freeze - To enter test functions. See below for notable parameters.
From the default HMI screen, press and hold Enter + Up. The 5CONFIG STATE screen displays. Press enter, and then confirm the switch by pressing enter again.
| Parameter | Description |
|---|---|
| 7DAMPER MIN POS | Drives damper to minimum position |
| 7DAMPER CLOSE | Drives damper 100% closed |
| 7DAMPER OPEN | Drives damper 100% open |
If configurations are done, press and hold Enter + Up or Down to switch to the 8RUN STATE screen, then press Enter twice to go back to Running State. The 1FREECOOL screen displays.
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