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Installation Manual
The heater may be used with the Complete System Shelter (CSS) or the Multi-
Purpose Shelter (MPS). Used with either shelter, it will protect the contents of
the shelter from damage due to cold weather or condensation. Use the heater if
you expect temperatures below 0˚F (-18˚C) or condensation.
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.
CAUTION: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 opening the shelter.
We also recommend that you unplug the wall transformer before opening the shelter.
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Product #7726, 7730
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Summary of Contents for Davis Instruments Complete System Shelter
- Page 1 The heater may be used with the Complete System Shelter (CSS) or the Multi- Purpose Shelter (MPS). Used with either shelter, it will protect the contents of the shelter from damage due to cold weather or condensation. Use the heater if you expect temperatures below 0˚F (-18˚C) or condensation.
- Page 2 OMPONENTS The heater includes components pictured below as well as the insulation blan- kets pictured on the following page. Please make sure you have all listed com- ponents before continuing. Page 2 OMPONENTS Heater...
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Page 3: Tools And Materials Needed For Installation
Insulation Blankets Included in your heater package will be the insulation blankets appropriate for either the Complete System Shelter or the Multi-Purpose Shelter, as pictured below. OOLS AND ATERIALS In addition to the components listed above, you will need some of the follow- ing tools and materials. - Page 4 Choosing Cable for the Heater The heater comes with a 50-foot (15 m) length of 22 gauge, two twisted-pair cable. When using this cable, the red and white wires are joined and used as one wire and the two black wires are joined and used as one wire. You may use 22 gauge, two-twisted pair wire in this manner for cable lengths up to 120 feet (36 m).
- Page 5 NSTALLING THE Follow the instructions below to install the insulation blankets and the heater in the appropriate shelter. Installing in the Complete System Shelter 1. Remove the panel from the back of the CSS. Consult your CSS manual for instructions.
- Page 6 5. Reattach the panel to the back of the CSS as shown below. 6. Attach the heater to the panel using the #6 screws as shown below. Installing in the Multi-Purpose Shelter 1. Crease and fold the MPS insulation blankets as shown below. Make sure the adhesive strips on the blanket are on the back of the blanket (the side not shown below).
- Page 7 2. Try inserting the blankets into the MPS to make sure they fit. Adjust the folding as necessary to make them fit. 3. Once you are sure the blankets will fit, remove the backing from the adhesive strips on the insulation blankets and secure the blankets in the MPS. 4.
- Page 8 3. Bend each bare wire into a U-shape and secure each one under a screw head on the terminal block as shown below. It does not matter which wire goes to each screw as long as only one wire goes to each screw. 4.
- Page 9 5. For strain relief, attach the self-adhesive mounting pad to the wall of the shelter and use a cable tie to secure the heater cable, as shown below. Routing the Cables Route the heater cable to the location at which you plan to plug in the wall transformer/power unit.
- Page 10 6. Bend each bare wire into a U-shape and secure under a screw head on the ter- minal block, as shown below. It does not matter which wire goes to each screw as long as only one wire goes to each screw. 7.
- Page 11 SING THE EATER You may switch the heater on and off from the power unit. When the heater is off, the indicator light on the power unit is also off. When the heater is set to “ON,” the indicator light on the power unit is also on.
- Page 12 Product Numbers: 7726, 7730 Davis Instruments Part Number: 7395-097 Complete System Shelter Heater, Multi-Purpose Shelter Heater Rev. B Manual (7/7/99) Controlled Online: Weather:Accessories:Shelter Heaters This product complies with the essential protection requirements of the EC EMC Directive 89/336/EC. © Davis Instruments Corp. 1998. All rights reserved.