INSTALLATION
Outlet
1.Using a 3/4" union and piping, connect the booster heater water outlet to the commercial dishwasher sanitizing rinse pipe connection.
CAUTION
To assure proper operation on all Large Compact Series units,
NOTE: Red mark on outlet water pipe for
NOTE: Be certain the connection is made to the final rinse and not to the wash tank.
2. Install a temperature/pressure gauge in the outlet |
line. The temperature sensing element must be |
Temperature/pressure gauge with 1/2" pipe thread
1/2" copper female | 1/2" pipe thread |
fitting adapter |
|
3/4" nominal | Temperature | |
sensing element | ||
copper pipe | ||
|
Figure 14. Recommended Temperature/Pressure
Gauge Installation
Temperature/pressure gauge with 1/2" pipe thread
in the water stream and the gauge must be |
mounted upright. Water temperature at the outlet |
should be |
14 or 15.) |
NOTE: Some dishmachines require two booster heaters be plumbed in series (not parallel) to meet the demand. (See Figure 9.) To assure proper operation a 20°F (11°C) temperature differential must be maintained between the outlet of the first booster heater and the inlet of the second booster heater.
Center bottom of sensor
in copper pipe
3/4" nominal copper pipe
3/4" x 1/2" x 3/4" copper tee
1/2" copper 
female fitting adapter
Temperature sensing element
NOTE: Hatco recommends installing an optional shock absorber, Hatco part number 03.04.057.00, in the outlet line as close as possible to the commercial dishwasher solenoid rinse valve. The shock absorber softens the water hammer caused by automatic dishwasher valves.
Plumbing Installation Inspection
1.Close drain pipe valve and fill booster heater with water.
2.Check all pipe connections for leaks.
3.Make sure relief valve discharge is not blocked.
4.Vent air from tank before operating by opening temperature/pressure relief valve.
CAUTION
Do not turn on power to the booster heater until the tank has been filled with water and all air has been vented through the dishwasher rinse nozzle. The heating elements will burn out in seconds if operated when they are not immersed in water.
Figure 15. Alternate Temperature/Pressure
Gauge Installation
WARNING
Hatco has always endorsed the use of safety equipment when using a booster water heater or
WARNING
It is essential to recognize that even though a water heater may be properly installed initially and approved, there always exists the possibility that unknowing individuals might alter or change the installation in a manner that would render it unsafe. Therefore, it is important that all safety programs provide some mechanism to assure that these installations are inspected periodically.
Form No. | 24 |
