StandardInsert Sizes
ModelNumber Size
2168 Blankinsert
2169 116¢¢insert
2170 18¢¢insert
2171 532¢¢insert
2172 316¢¢insert
2173 14¢¢insert
2174 516¢¢insert
2175 38¢¢insert
2176 12¢¢insert
2177 58¢¢insert
2178 716¢¢insert
2179 916¢¢insert
6.4 Well Insulator (9107only)
The 9107 includes a wellinsulator made of white polymer foam that fits into
the opening abovethe block (see Figure 5). The well insulator has three
purposes:
1. Insulate the top of the block to minimize the vertical temperature gradi-
ent in the block.
2. Insulate the top of the block to prevent excessive heat from flowing into
or out of the block which may prevent it from reaching its minimum or
maximum temperatures.
3. Shield the top of the block from open air thus reducing the potential for
excessive water condensation on the block. Excessive water on the
block can cause corrosion over a long period of time. Water condensa-
tion that freezes expands and can damage the block.
Forthese reasons the 9107 must always have the well insulator installed when
itis operated with well temperatures below 25°C. The well insulator fits snugly
into the circular cavity just abovethe block. For best results do not pus h the
well insulator all the way down into the cavity.Instead, leave the top of the well
18 HartScientific
6Parts and Controls