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LockStateConnect LS-90 Installation Manual

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LS-90 Installation Guide
Caution
• Your thermostat is a precise instrument, handle it with care.
• Turn off electricity to the HVAC system before installing or
servicing thermostat or any part of the system.
•
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• Do not short (jumper) across electric terminals at the control
on the furnace or air conditioner to test the system. This may
damage the thermostat.
• All wiring must conform to local codes and ordinances.
• This thermostat is designed for use with 24 volt AC and
millivolt systems (with a separate 24VAC power adapter).
• The thermostat relay load should be limited to 1.0 amp;
higher amperage may cause damage to the thermostat.
Caution
To avoid electrical shock and to prevent damage to the
furnace, air conditioner, and thermostat, disconnect the power
supply before beginning work. This can be done at the circuit
breaker, or at the HVAC system.
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Notes
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Summary of Contents for LockStateConnect LS-90

  • Page 1 Customer system your Notes LS-90 Installation Guide Caution • Your thermostat is a precise instrument, handle it with care. • Turn off electricity to the HVAC system before installing or servicing thermostat or any part of the system. •...

  • Page 2: Remove Old Unit

    You will need a small Phillips screwdriver and a drill with 3/16-in. (4.8mm) bit for wall mounts. LOCATION Replacement installations - mount the LS-90 in place of the thermostat. You must have a “C” wire or other 24VAC power available at the LS-90 location. A new location will require moving your wiring.

  • Page 3: What Wires Do You Have

    Reference page 13 for better understanding of wire labels from different HVAC system makers. IMPORTANT: C wire or 24VAC power is required for the LS-90 to operate. If you do not have a C wire you can run a new wire from the HVAC to the LS-90 or provide 24VAC power to operate the LS-90 using a standard 24VAC wall transformer.

  • Page 4: Hvac Set-Up On Screen Menu

    With all the wires connected (including the C wire), it is time to turn the AC power back on. Do this at the breaker you used to switch it off. The LS-90 will power-up in the control OFF mode. Your LS-90 is not con gured to operate your HVAC system yet.

  • Page 5: Set-Up For Normal A/C Cooling Systems

    5. If you have AUXILIARY heat, touch the number of stages (default is [NONE] ) use the +/- buttons to select 1-2 stages. (NOTE: The LS-90 controls a maximum of 3 stages total between pump and AUX.) 6. (If you have AUX) Select the type of auxiliary heat that you have - Electric or Gas-Oil.
  • Page 6 Congratulations, you have successfully installed your unit. Please proceed to the OPERATING SA VE Guide to initialize the LS-90. EN ER GY IMPORTANT: After you have labeled and connected your wires, TA R G ET TE M P and followed the correct HVAC set-up, if these check procedures do...

  • Page 7: Wire Reference Chart

    POWER ADPT H or DH RELAY WIRE REFERENCE CHART LS-90 Terminal Your Wires R or V or VR RH and RC Single power for HEAT and COOL RH or 4 RH Power for HEAT (RH not connected to RC jumper clip removed)
  • Page 8 Zoned Systems Reference Your Wires Radio Thermostat Terminal 2 wire Zoned Hot Water 3 Wire Zoned Hot Water Motor Driven Valves R or 5 RH (power) W or 4 W (heat ON) Y or G or 6 (the 3rd wire) A (heat OFF) 3 Wire Zoned Hot Water Solenoid Valves RH (power)

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