Note: Both the Freeze-Clik^® 401 and the Freeze-Clik^® 401R (a "reverse" model where instead of switching system operation "off" at a set temperature point, the system is switched "on") are installed and wired in the same manner.

Contents
1. Mounting
2. Wiring to the Controller
3. Operation 
4. Bypassing the Freeze-Clik Sensor

The correct placement of the Freeze-Clik is critical for accurate temperature sensing. It must be mounted out of direct sunlight, and where free outdoor air circulation is possible. Examples would be the north wall of a building or under eaves or overhangs. 
If the best location for temperature sensing is not a feasible location for mounting the Freeze-Clik, an alternate location may be chosen if, in addition, a "sun guard" is used (a piece of flashing, for example) to shade the Freeze-Clik during that time of day that the sun could hit it (see Figure 1). 
The Freeze-Clik housing is designed so that it provides the sensing element some amount of shaded protection from direct or indirect radiation, while allowing air to move freely around it. This feature, along with the best possible placement, will allow the Freeze-Clik freeze sensor to respond at the correct temperature. 
Using the screws provided, attach the Freeze-Clik to the chosen surface. Run the extension wire to the controller. If an extension to the wire is needed, use wire no lighter than 20 AWG.

Wiring to the Controller

The Freeze-Clik freeze sensor is wired to the 24 VAC common ground circuit of the solenoid valves (as shown in Figure 2). Locate the common ground wire of the solenoid valves. If it is connected to the common terminal on the controller, disconnect it. 

Attach one lead of the Freeze-Clik^® to the common terminal on the controller and the other lead to the common ground wire of the solenoid valves.

If a Mini-Clik^® rain sensor is already installed or is to be part of the installation (see Figure 3), the freeze sensor is to be wired in series with the rain sensor so that either (or both) devices can control the circuit.

The Freeze-Clik is preset and is not adjustable. It will break the common ground circuit, thereby keeping the sprinkler system from operating at, or below, 3°C (37°F). At temperatures above 3°C, it will close the circuit for normal sprinkler operation.

For Freeze-Clik-401R Model: The temperature setting works in reverse on this model with the circuit not allowing operation of the sprinkler system above 3°C (37°F). Once the temperature reaches this point or goes below, it will activate the system and commence watering for whatever amount of time you have set on your controller. 

Note: The factory tolerance for the setpoint on both the Freeze-Clik 401 and the Freeze-Clik 401R models is ± 2°C, therefore your particular unit will switch at a temperature in this range. 

Special usage note: For landscape applications only. Not for crop protection. A freeze sensor should only be used as part of a sound irrigation management program, including regular system visual checks.

For controllers not equipped with a built-in bypass feature, should you desire to bypass the operation of the Freeze-Clik for any reason (i.e., turn on your system even though the Freeze-Clik has shut "off" due to low temperature), there are two simple ways to do this. The first is to add our Bypass Switch Box which mounts on, or next to, the controller. By simply moving the switch, the Freeze-Clik is bypassed. 

The second method is to simply heat the Freeze-Clik with your hand or some other mild heat source. 

Note: Using the manual switch on the controller will not bypass the sensor.