Hatco IMPERIAL "S manual Inlet, Refer to , 9, 10, 11 or

INSTALLATION

Inlet

Refer to Figure 8, 9, 10, 11 or 12.

1.Connect the booster water inlet to a hot water supply line from the regular water heater. Water temperature from the regular water heater should be 110° or 140°F (43° or 60°C) and should not exceed 160°F (71°C). Minimum temperature differential between inlet and outlet should never be less than 20°F (11°C).

NOTE: Refer to BOOSTER HEATER SIZING CHART for application information.

WARNING

To avoid personal injury and avoid damage to the booster heater refer to BOOSTER HEATER SIZING CHART in this manual.

CAUTION

To assure proper operation on all Compact Series Booster Heaters, do not turn or adjust inlet water connection on unit. Doing so will change the internal water flow.

NOTE: Red mark on inlet water pipe of Compact series units must remain in the top most position.

CAUTION

To prevent electrolysis or plumbing damage dielectric couplings should be used in connecting dissimilar metals, such as galvanized to copper.

CAUTION

To avoid possible leaks, do not back out or loosen any pipe fitting.

CAUTION

Incoming water in excess of 3 grains of hardness per gallon ([GPG] .75 grains of hardness per liter [GPL]) must be treated and softened before being supplied to booster heater(s). Water containing over 3 GPG or

.75 GPL will decrease efficiency, increase energy use, and reduce the operating life of the unit through increased lime build-up. Product failure caused by liming or sediment buildup is not covered under warranty.

NOTE: Product failure caused by liming or sediment buildup is not covered under warranty.

2.Provide the inlet line with a shut-off valve, (a full opening gate or ball type), one temperature/pressure gauge, and the pressure reducing valve. Set pressure reducing valve at 20 psi (138 kPa) flow pressure.

NOTE: A 3/4" union and a drain valve are required for easy servicing.

NOTE: Be sure water flows through the pressure reducing valve in the proper direction. Check directional arrow. Valve will reduce pressure only during flow conditions.

3.Install a temperature/pressure gauge in both the inlet and outlet lines. Install the temperature sensing bulb in the water stream. The gauge must be mounted upright. (See Figures 14 and 15.)

NOTE: Tighten gauge during installation by only turning the 1/2" brass nut. DO NOT turn the face of the gauge. Turning the face will cause inaccurate measurements.

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.

21 Form No. EBOOSTERM-0406