radiators, hot water pipes, etc. Any lengths of tubing that are exposed to high ambient temperatures should be insulated to prevent condensation and/or significant liquid heat loss.
After ensuring that the system is free from the obstruction, that all valves are open, and the reservoir when avail- able is full, push the CONTROL POWER switch to the “ON” position. The pump should now be operating.
Process Water Flow, Units Without Reservoir (Optional)
Follow standard plumbing practices and local codes in making water connections. The Chiller inlet and outlet connections are 3/4”. Flexible hose and fittings are recommended for plumbing the system. A No. 20 mesh strainer should be installed on the Chiller inlet to prevent foreign particles from entering the system and should be cleaned monthly. Lines should be routed with as few bends as possible. Prevent lines from running near radiators, hot water pipes, etc. Any lengths of tubing that are exposed to high ambient temperatures should be insulated to prevent condensation and/or significant water heat loss.
Proper priming of the water lines is essential to prevent pump cavitation. Be certain all air has been purged from the lines before operating the pump for an extended period of time. Be sure to remove any loops in the lines that may trap air. The pump must have a supply of water with the level of the water above the inlet of the Chiller. The supply tank must feed the Chiller from the side of the tank below the water level (see Figure 2).
CHILLER
INLET
LINE
CHILLER W/O TANK
WATER
LEVEL
EXTERNAL RESERVOIR
CORRECT
CHILLER |
| CHILLER | |
| INLET | ||
INLET |
| ||
| LINE | ||
LINE |
| ||
|
| ||
CHILLER | WATER | CHILLER | |
LEVEL | |||
W/O TANK | W/O TANK | ||
| |||
| EXTERNAL |
| |
| RESERVOIR |
|
WATER
LEVEL
EXTERNAL RESERVOIR
CHILLER
INLET
LINE
CHILLER W/O TANK
WATER
LEVEL
EXTERNAL RESERVOIR
WATER LEVEL IS | AIR CAN BE TRAPPED IN | WATER FEEDING FROM |
BELOW CHILLER INLET | CHILLER INLET | TOP OF TANK |
INCORRECT | INCORRECT | INCORRECT |
FIGURE 2. EXTERNAL RESERVOIR WATER LEVEL
THERMOSTAT ADJUSTMENT
Standard Thermostat
The following procedure should be followed to adjust the standard thermostat:
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