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Auto-Fill System
A factory-installed Auto-Fill feature is available for 3CS2 and
FR2 models. Units equipped with Auto-Fill require the following
steps before startup.
WARNING
ELECTRIC SHOCK HAZARD:
• Unit must be installed by qualified, trained installers.
Installation must conform to all local electrical and
plumbing codes. Installation by unqualified personnel
will void the unit warranty and may lead to electric
shock or burn, as well as damage to unit and/or its
surroundings. Check with local plumbing and electrical
inspectors for proper procedures and codes.
• Turn OFF power switch, turn off power at circuit
breaker, and allow unit to cool before performing any
cleaning, adjustments, or maintenance.
Auto-Fill units must be installed with adequate backflow
protection and must conform with all federal, state, and
local codes.
NOTICE
Do not exceed an incoming water temperature of 140°F
(60°C) or incoming water pressure of 80 psi (550 kPa).
1. Make sure the Power I/O (on/off) switch to the O (off)
position and power is off at the circuit breaker.
2. Connect 1/4" NPT copper water supply line to the water
inlet of the solenoid valve near the back of the unit.
NOTE: Ball valve, line strainer, union(s), and vacuum breaker
or other anti-siphon device must be supplied by table
manufacturer or installer, if required.
3. Locate the desired point on the sidewall of the sink or
holding vessel for the water level sensor to be installed.
• Install the sensor in the sink or holding vessel at least
1/2" (13 mm) below any food pans or other object it
could come into contact with. Incidental contact may
cause false readings and damage.
• Make sure the sensor is easily accessible for cleaning.
4. Mark and drill a 1/2" (13 mm) mounting hole into the side
wall of the sink or holding vessel.
5. Deburr the hole to prevent burrs from cracking or damaging
the probe when tightened.
6. Remove the large nylon nut and washer from the water
level sensor.
7. Position the water level sensor into the sink or holding
vessel making sure the o-ring is in place on the sensor
against the inside wall.
8. Place the washer onto the threads of the water level
sensor on the outside wall of the sink/holding vessel.
9. Secure with the nylon nut, making sure the flat side of the
nut is toward the washer.
HHM-0224
CAUTION
OPTIONS AND ACCESSORIES
10. Tighten until snug. Be careful not to over-tighten the nut.
Over-tightening may cause leaks and/or crack the sensor.
11. Turn on the water supply and check for leaks.
12. Connect the sensor lead wire that exits the back of the
Hydro-Heater to the installed water level sensor.
1/2" hole in
side wall.
O-Ring
Water Level
Sensor
Rear View of Hydro-Heater
Installing the Auto-Fill System
Security Package
A security package is a factory-installed option for 3CS2 and
FR2 models. A security package contains Torx
control cover.
13
Cutaway of
sink/holding vessel
side wall.
Nylon Nut
Washer
60" Sensor
Lead Wire
Solenoid
Solenoid
Valve
Valve
1/4" NPT
water inlet on
Water Supply
solenoid valve
w/Backflow
Prevention
screws and a
®
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