
2
REPLACING THE THERMOSTAT
WARNING: Danger of shock. Be sure to turn power o.
Use ONLY Raritan replacement thermostat
(#WH16 ignition protected).
1. Remove access panel to thermostat and element.
2. Remove cover (personnel protector).
3. Unscrew the neutral and hot wires from the element with
a Phillips screw driver.
4. Cut the incoming wires. Pull tabs of thermostat mounting
bracket forward and lift thermostat out.
5. Install new thermostat.
6. Strip incoming wires, exposing 5/16" (8mm) of wire.
7. Crimp neutral wire supply to white wire and hot wire
supply to black wire (series connector provided with new
thermostat).
8. Screw ring terminals of white and black wires on lower
side of thermostat to studs of the element.
9. Reinstall personal protector panel.
NOTE: Check for leaks before proceeding.
10. Replace access panel.
11. Turn on AC power.
L206 0420jlc
2
FIG 1
MAINTENANCE
Following installation, temperature and pressure relief lever
MUST be operated by lifting lever up AT LEAST ONCE A
YEAR to ensure that the water ways are clear. Certain naturally
occurring mineral deposits may adhere to the valve, rendering
it unoperative. When manually lifting the lever up, water will
discharge and precautions must be taken to avoid contact with
hot water and to avoid water damage. BEFORE lifting lever
up, check to see that a discharge line is connected to this valve
directing the ow of hot water from the valve to a proper
place of disposal, otherwise personal injury from hot water
or steam may result. If no water ows, valve is inoperative.
TURN OFF THE WATER HEATER AND REPLACE THE
VALVE IMMEDIATELY.
If a backow preventer such as a check valve is installed in
cold water line and temperature and pressure valve discharges
a cup of water per 10 gallon capacity of water heater during
heating, reason for this occasional discharge is thermal
expansion of water in closed system. An expansion tank
should be installed in cold water line after check valve to
correct such occasional discharge or dripping of temperature
and pressure valve (See FIG 2).
Inspection of Anode and proper winterization is required
of the Raritan Water Heater. Periodic visual inspection is
recommended to be sure connections are tight, wires are
not frayed and the unit is properly grounded. DO NOT use
solvents to clean heater jacket. Incorporate this inspection
into commissioning procedure in spring and winterizing
procedure in fall.
A removable magnesium Anode is integral with the hot water
discharge tting. The Anode should be checked frequently
depending on hardness of water by removing it from the
water heater. Initially after installation, check within a year
and depending on water quality frequency can be reduced to
every 3 to 5 years. If the Anode diameter is less than 3/8"
(9.5 mm), it should be replaced. If discoloration, unusual
smell or taste develop in the water, inspect or replace Anode.
The Anode is replaceable as a unit and may be ordered from
Raritan dealers or from the factory. Please specify part number
1790610 for 6 gallon model and part number 1790010 for 12
and 20 gallon models.
REPLACING THE ANODE IN RARITAN
WATER HEATERS
4. When water stops owing out, remove any piping or
ttings from hot water “out” nipple tting (see FIG 1).
5. Remove plastic nish washer to reveal unthreaded
area of nipple. Remove nipple with pipe wrench. Note
that magnesium rod extends well into water heater and
adequate clearance must be available to remove it.
11" for 6 gallon tanks and 16" for 12 and 20 gallon tanks.
6. Apply pipe PTFE thread compound or thread tape
to new anode and screw into water heater tank.
Tighten securely with pipe wrench. Re-connect all
external plumbing.
7. Close temperature and pressure relief valve and turn
on pressure pump.
8. When pump has come up to pressure and shut o,
check for leaks, then restore electric power.
1. Turn o electric power to water heater.
2. Turn o pressure pump and open faucets to bleed
pressure from water system. When water stops, close
faucets.
3. Open pressure and temperature relief valve to allow
water level in water heater to drop below level of
valve.
Plastic nish washer,
press this in to reveal
unthreaded portion of
nipple
TEMP./PRESS.
RELIEF VALVE
HOT
COLD
Unthreaded section
of anode nipple - grip
with pipe wrench to
remove and re-install
ANODE
Plastic nish washer.
Remove washer from
anode this will reveal
unthreaded portion of
nipple