Installation Instructions
MODEL LS-HC
Limit -Stat™
Single Stage (1H/1C)
Non-Programmable Thermostat
Patent Pending
1. THERMOSTAT DETAILS
REQUIRES the thermostat to turn on the fan set the
ELECTRIC/GAS switch to the electric position. (See
Thermostat Details) This will allow the thermostat to
energize the fan immediately on a call for heat.
Do not use on circuits exceeding specified
voltage. Higher voltage will damage control
and could cause shock or fire hazard.
Do not short out terminals on gas valve or
primary control to test. Short or incorrect
wiring will damage thermostat and could
cause personal injury and/or property
damage.
Thermostat installation and all components of
the system shall confirm to Class II circuits
per the NEC code.
WARNING
Attaching Thermostat Base to Wall
1. Disrupt power to HVAC equipment.
2. Remove the packing material from the thermostat.
Gently pull the cover straight off the subbase. Forcing or
prying on the thermostat will cause damage to the unit.
Confirm that the ELECTRIC/GAS Switch is in the proper
position.
3. Connect thermostat wires to proper terminals on the
subbase (see Typical Wiring Diagrams).
4. Level and mount thermostat subbase to wall using
anchors and mounting screws provided.
5. Snap cover back in place.
6. Reapply power to HVAC equipment.
3. CONTROL AND DISPLAY FUNCTIONS
LIMITER
2. MOUNTING AND WIRING
Electric Heat or Single Stage
Heat Pump Systems
This thermostat is configured from the factory to operate
a heat/cool, fossil fuel (gas, oil, etc.), forced air system. It
is configured correctly for any system that DOES NOT
require the thermostat to energize the fan on a call for
heat. If your system is an electric furnace that
Wire to furnace
‘W’ Terminal
CONTROL FUNCTIONS
1 - UP ARROW – Raises temperature setting.
2 - DOWN ARROW – Lowers temperature setting.
3 - FAN SWITCH – ON, AUTO
4 - SYSTEM SWITCH – COOL, OFF, HEAT
DISPLAY.
5 – MODE – Heating symbol displayed when SYSTEM
SWITCH is set to HEAT. Cooling symbol displayed when
SYSTEM SWITCH is set to COOL.
6 – SPACE TEMPERATURE
7 – SETPOINT
4. SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC 50/60 Hz.
0.05 to 1.2 Amps (Load per terminal)
1.5 Amps Maximum Total Load
(All terminals combined)
THERMAL DATA
Setpoint Temperature Range: 45° to 90° F
(7° to 32° C)
Limiter: Fixed Range 73° F (22.5° C)
Operating Ambient Temperature: 32°F to 105° F
Operating Humidity Range: 0 to 90% RH (non-
condensing)
Shipping Temperature Range: -40°F to 150°F
Wire to furnace ‘W’ terminal
Wire to furnace ‘W’ terminal
TYPICAL WIRING DIAGRAM
5. OPERATION
The Model LS-HC Limit-Stat™ operates like an ordinary
manual changeover heating/cooling, digital thermostat.
In normal operation, it allows full user control in selecting
mode (HEAT/COOL) and fan (ON/AUTO) as well as
adjustment of heating and cooling setpoints. However,
when the thermostat is in the heating mode of operation,
the built-in limiter will prevent the temperature from rising
above 73° F when the setpoint is adjusted above the
limit range. This unique feature greatly reduces energy
costs.
LIMITER
RED jumper wire (provided with thermostat)
must be connected between thermostat RH
and RC terminals for proper thermostat
operation with this system.
LIMITER
TOLL-FREE: 888-652-9663 FAX: 317-227-1034
www.jacksonsystems.com
5418 ELMWOOD AVENUE - INDIANAPOLIS, IN 46203
NOTE:
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