background image

1

Rain Collector Heater

Installation Manual

The Rain Collector Heater may be 
used to protect the Rain Collector’s 
internal components from freezing 
and/or to measure the moisture 
content of snowfall. When the 
heater is on, it is capable of 
melting snow at a rate of 1/4'' 
(6

  mm) of liquid precipitation per 
hour. It may not be able to keep up 
with larger rates of snowfall. 

The rain collector heater warms 
only the inside of the rain collector 
and the cone itself. 

Please note that we have made every attempt to design and manufacture a 
safe product, but Davis Instruments assumes no liability for any injury or 
damage caused directly or indirectly by the installation or use of this 
product.

Note: 

Although the nominal heater voltage is not hazardous, a short in the wall 
transformer could cause hazardous voltage to appear on the heater 
wires. For safety, you should always turn the heater’s power unit to the 
“OFF” position before removing the rain collector’s cone. We also 
recommend that you unplug the wall transformer before removing the 
rain collector’s cone.

This instruction manual is designed to take you step-by-step through the 
process required to install and use your rain collector heater. Please take the 
time to read through this manual before beginning the process.

Components

The rain collector heater includes the following components. Please make 
sure you have all listed components before continuing.

Heater Assembly

 — Includes heater element, thermostat, and terminal 

block for power cable.

Wall Transformer with Power Unit

Insulation Blanket

50' (15 meter) Heater Cable

Summary of Contents for 7720

Page 1: ...Note Although the nominal heater voltage is not hazardous a short in the wall transformer could cause hazardous voltage to appear on the heater wires For safety you should always turn the heater s po...

Page 2: ...wing tools and materials Please be sure you have everything you need before beginning the installation Medium Phillips head and Slot tip Screwdrivers Drill with 5 32 4 mm or 3 16 4 8 mm and 9 32 7 2 m...

Page 3: ...signal To prevent this interference do at least one of the following Use twisted pair for the heater cable or the signal cable Use shielded cable for the heater cable or signal cable shield must be g...

Page 4: ...below Otherwise skip to step 5 Marking screw holes 3 Using a drill with a 5 32 4mm or a 3 16 4 8 mm drill bit drill holes in the marked locations 4 Using a drill bit with a large enough diameter to a...

Page 5: ...llector Heater 5 5 Loosen the screw heads on the terminal block You will eventually secure the heater cable wires underneath these screw heads Rain collector heater terminal block Terminal Block Termi...

Page 6: ...assembly to the rain collector base using the 6 32 x 3 4 19 mm screws a lock washer and a hex nut as shown below Securing the heater in a stand alone rain collector Note Stand alone rain collectors a...

Page 7: ...wire strippers or a knife strip 3 8 10 mm of insulation from the heater cable wires 8 If you have a Vantage Pro2 rain collector use a medium size Phillips head screwdriver to knock out the hole for th...

Page 8: ...rminal block as shown below It does not matter which wire goes to each screw as long as only one wire goes to each screw Attaching cables to the terminal block of stand alone rain collector heater Hea...

Page 9: ...cess cable tie 13 Re attach or attach the rain collector to the mounting surface Installing the Insulation Blanket 1 Fit the insulation blanket against the side of the rain collector cone pushing it a...

Page 10: ...cy to cut the cables Note If your cable run extends more than 50 feet 15 m keep the heater cable and the rain collector cable separated by at least a few inches as discussed in Choosing Cable for the...

Page 11: ...LLIC PORTION OF THE HEATER You should be able to feel the heat at a short distance from the heater element Using the Rain Collector Heater You may switch the rain collector heater on and off from the...

Page 12: ...01 certified Davis Instruments Corp 2010 All rights reserved 3465 Diablo Avenue Hayward CA 94545 2778 U S A 510 732 9229 Fax 510 732 9188 E mail info davisnet com www davisnet com When the temperature...

Reviews: