Specifications

INSTALLATION
Form No. EBOOSTERM-0712
18
Plumbing Installation
Do not connect booster water heaters to domestic
(consumer) dish machines or other domestic utilized
equipment. This booster may damage domestic equipment.
Do not connect an expansion tank of any type to booster
heater water lines.
Use only plumbing material suitable for a minimum water
temperature of 200°F (93°C). Materials used must meet
National Sanitation Foundation (NSF) specifications and
all local plumbing codes and regulations.
Refer to the BOOSTER HEATER SIZING CHART in this
manual to ensure proper sizing and avoid personal injury
and/or damage to the booster heater.
Do not connect booster heater directly to a boiler or
furnace coil or any other uncontrolled temperature
source. The booster heater thermostat could be damaged
causing unit to overheat.
Use dielectric couplings when connecting dissimilar
metals, such as galvanized to copper. This will prevent
electrolysis or premature plumbing damage.
DO NOT turn or adjust inlet water connection on Compact
Series Booster Heaters. Doing so will change the internal
water flow.
Do not back out or loosen any pipe fittings. Doing so may
cause leaks.
Do not lay unit on the side with the control panel. Damage
to the unit could occur.
Incoming water in excess of 3 grains of hardness per
gallon (GPG) (0.75 grains of hardness per liter [GPL]) must
be treated and softened before being supplied to booster
heater(s). Water containing over 3 GPG (0.75 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.
Do not use deionized water. Deionized water will shorten
the life of water reservoir and heating element.
NOTE: Product failure caused by liming or sediment buildup is
not covered under warranty.
NOTE: A 3/4" union and a drain valve are required for easy
servicing.
NOTE: An optional flow restrictor (P/N 03.02.074.00) is
available for installation on the water inlet line.
NOTE: Some dish machines require two booster heaters to be
plumbed in series (not parallel) to meet the demand.
To ensure proper operation, a 30°F (-1°C) temperature
differential must be maintained between the outlet of
the first booster heater and the inlet of the second
booster heater.
WARNING
CAUTION
NOTICE
Inlet
Use the following procedure to install the inlet assembly. Refer
to the appropriate “Plumbing Connections” diagram in this
section for more information.
1. Connect the booster water inlet to a hot water supply line
from a normal water heater.
• Water temperature from the water heater should be
110°–140°F (43°–60°C) and should not exceed 160°F
(71°C). Minimum temperature differential between inlet
and outlet should never be less than 30°F (-1°C).
NOTE: Refer to BOOSTER HEATER SIZING CHART for
application information.
NOTE: The red mark on the inlet and outlet water pipes of
Compact series units must remain in the top most
position.
2. Install a shut-off valve (a full opening gate or ball type).
3. Install one of the temperature/pressure gauges.
• When installing the temperature/pressure gauge, the
temperature sensing element must be in the water
stream and the gauge must be mounted upright.
NOTE: Tighten gauge during installation by turning the 1/2"
brass nut only. DO NOT turn the face of the gauge.
Turning the face will cause inaccurate measurements.
Hatco requires that two temperature/pressure gauges
(Hatco P/N 03.01.003.00) be installed to ensure proper
operation. Install one in the supply line before the
pressure reducing valve and one in the outlet line as close
to the booster heater as possible. This provides a visual
check of the water temperature and pressure before and
after the water heater.
NOTE: If a check valve is installed and cannot be removed,
install a back pressure relief valve (P/N 03.02.039.00) set
at 125 psi (862 kPa) on the incoming line between the
pressure reducing valve and the inlet to the booster
heater. Discharge must be to open site drain.
Temperature/Pressure Gauge
CAUTION