Scalding
This water heater can deliver scalding temperature water at any
faucet in the system. Be careful whenever using hot water to avoid
scalding injury. Certain appliances such as dishwashers and
automatic clothes washers may require increased temperature
water. By setting the thermostat on this water heater to obtain
the increased temperature water required by these appliances,
you may create the potential for scald injury. To protect against
injury, you should install a mixing valve in the water system.
This valve will reduce point of discharge temperature by mixing
cold and hot water in branch supply lines. Such valves are
available from the local plumbing supplier.
Figure 3-5 Scald Warning Label Located on the Appliance
RELIEF VALVE
FLOW
SWITCH
TEE WITH 1"
FITTING ON TOP
CLOSE NIPPLE
TEE WITH 3/4"
FITTING ON TOP
IMG00424
CLOSE NIPPLE
COUPLING
6" NIPPLE
(400-701 ONLY)
Flow switch adjustment
Refer to Table 3A for the proper setting of the sensitivity screw.
For reference, the position of the screw prior to setting should
be turned clockwise with a Phillips driver until it stops (FIG.
3-4). Proceed to turn the screw counterclockwise the amount
of turns listed in Table 3A based on the model.
Consult the manufacturer’s instructions for wiring the flow
switch to your system.
NOTICE
Be sure to install flow switch so that the arrow
on the flow switch is pointing in the direction
of the flow (see FIG. 3-4).
Figure 3-3 Flow Switch and Relief Valve Installation
Installation & Operation Manual
3
System piping
14
NORMALLY
OPEN
SENSITIVITY
ADJUSTMENT
NORMALLY
CLOSED
COMMON
GROUND
NOTICE
Turn the sensitivity screw clockwise to increase
the flow rate required to activate the switch.
Turn the sensitivity screw counterclockwise to
decrease the flow rate required to activate the
switch.
Figure 3-4 Flow Switch Adjustment
MODEL
PADDLE SIZE
SENSITIVITY SCREW
ADJUSTMENT
Note: Paddles are included with the flow switch.
151
#1
9 turns
200
#1
6 turns
286
#3
8¾ turns
400
#1
8 turns
501
#1
7½ turns
601
#1
7 turns
701
#1
6½ turns
801
#1
5½ turns
Table 3A Paddle Size / Sensitivity Screw Adjustment
5. Attach the paddle to the flow switch per the manufacturer’s
instructions. Reference Table 3A to select the
correct paddle for the pipe size used (consult the
manufacturer’s instructions for a detailed explanation).
For Example:
If using a 1 1/4 inch pipe size (Models
OAN151 - OAN200) select paddle #1.
6. Install the assembled flow switch into the 1 inch fitting of
the tee installed in Step 4 (see FIG. 3-3).
