Pressure Relief Valve - STA-RITE 200K BTU/HR Owner's Manual

WATER PRESSURE SWITCH
Hazardous pressure. Do not bypass the Water
Pressure Switch or render it inoperable.
Switch Settings
The water pressure switch turns off the burner if the water
flow is interrupted. If the water flow is restricted, the water
pressure switch may prevent the burner from firing and
cause the "Service System" light to go on. If the light
remains on after the filter has been serviced, have a quali-
fied service technician check the system.
For deck-level heater installations, the Pressure Switch is
factory set at 3 psi. If the pressure switch is one to two feet
below or one to five feet above the pool water level, reset
the switch so that it is open when the pump is off and
closed when the pump is running. Turn the star-wheel on
the switch clockwise (
the pool) and counterclockwise (
(see Figures 18 and 19). Test the switch after resetting.
FIGURE 18: Remove cover for access to Switch
Raise pressure
if pressure switch is
More than 2 feet
below water level
Lower Pressure
Lower pressure if
pressure switch
is more than 5 feet
b t l l
FIGURE 19: Pressure Switch Adjustment
) to raise setting (heater below
) to lower the setting
Raise Pressure
NOTICE: When the heater is mounted more than five feet
above or two feet below the deck level, a Pressure Switch
is no longer adequate. A Flow Switch must be installed
instead.
NOTICE: Operation of the heater without sufficient water
flow may severely damage the heater.
Verify proper operation of the water pressure switch at the
start of every season and every six months thereafter by the
following steps:
1. Lower the thermostat setting to turn off the heater.
2. Wait at least 15 minutes after the burner is off, and
then turn off the filter pump.
3. Turn up the thermostat as though to fire the burner.
4. Wait one minute. The "Service System" light should go
on but the burner should not fire and the blower
should not start. If the blower or burner
the "Service System" light does not go on, there is a
pressure switch malfunction. Immediately press the
OFF button on the operating control to turn the burner
off and call a qualified service technician to check the
system.
Live steam hazard. If the Burner and the
Pump stop at the same time, wait at least 15 minutes
before starting the filter pump to avoid severe damage to
the heater.

PRESSURE RELIEF VALVE

A pressure relief valve is not supplied with the heater.
Some local codes may require installation of a pressure
relief valve. If required, install a 3/4" pressure relief valve
complying with the ANSI/ASME Boiler and Pressure Vessel
Code, having a capacity equal to the Btu/hr rating of the
heater. The relief pressure of the valve MUST NOT
EXCEED 50 PSI.
A 3/4" NPT connection is provided in the manifold adapter
for installing a pressure relief valve. The relief valve must
be installed vertically. To install the valve, use a 3/4" brass
nipple and elbow, as illustrated in Figure 20. No valve is
allowed to be placed between the manifold adapter and
the relief valve.
To avoid water damage or scalding from operation of the
Relief Valve Installed
User
supplied
pipe
fittings
FIGURE 20: Relief Valve
18
do start, or if
2681 1096
Pipe relief valve discharge
to a drain or other safe
disposal site.