Pentair ETi 250 - Sediment Traps

ETi 250 High Efficiency Pool and Spa Heater Installation and User’s Guide
26
To Air Flow
Switch
To Gas
Valve Vent
Vent
Pressure Tap
To Low Side
of Differential
Pressure Gauge
To High Side of Differential
Pressure Gauge
Pressure Tap
Inlet
SEDIMENT TRAPS
CHECKING GAS PRESSURE THROUGH GAS CONTROL VALVE (CONTINUED)
This appliance is equipped with an unconventional gas control valve that is factory set with a manifold pressure of 1.4"
(3.6 cm) wc. Installation or service must be performed by a qualied installer, service agency, or the gas supplier. If this
control valve is replaced, it must be replaced with an identical control.
The combination gas valve incorporates dual shut-off valves and a pressure regulator. For proper operation, the regulated
pressure at the outlet manifold of the valve must be 1.4" (3.6 cm) wc below the reference pressure at the blower mixer
inlet, and the gas valve ‘VENT’ tap must be connected to the end cap air orice as shown in Figure 19.
Do not attempt to adjust the gas input by adjusting the regulator setting. The correct gas regulator setting is required to
maintain proper combustion and must NOT be altered.
WARNING: It is critical to connect the tubing from the gas valve outlet pressure to the High Side of Differential
Pressure Gauge and the tubing from the vent must be connected to the Low Side of the Differential Pressure
Gauge, as seen in Figure 19, to avoid incorrect adjustment of the gas valve that may lead to excess of carbon
monoxide which can cause damage to the heater, property damage, personal injury, (including brain damage), or
death. The release of carbon monoxide is colorless and odorless and may result in serious injury or death. The
connections to the Differential Pressure Gauge are different with respect to all other Pentair pool heaters.
To Air Flow
Switch
To Gas
Valve Vent
IMPORTANT: IF THERE ARE ANY IGNITION ISSUES AFTER THE NATURAL GAS TO PROPANE CONVERSION, CALL
PENTAIR TECHNICAL SUPPORT AT 800.831.7133.
Install a sediment trap and union
located outside the heater panels
in accordance with National code
requirements. Do not use a restrictive
gas cock. The sediment trap shall
be either a tee tting with a capped
nipple in the bottom outlet which
can be removed for cleaning, as
shown in Figure 20, or an other device
recognized as an effective sediment
trap. All gas piping should be tested
after installation in accordance with
local codes.
Figure 20.
Figure 19
18-1/4 -IN OF 3/4-IN
GAS LINE FROM VALVE
AT LEAST 9-IN (23 CM)
AT LEAST 3-IN (8 CM)
SEDIMENT TRAP BELL REDUCER
UNION
1-IN (3CM) DIAMETER
OR LARGER (SEE
RECOMMENDED PIPE SIZE
CHART)
MANUAL
SHUT-OFF
VALVE
Installation
WARNING: DO NOT : DO NOT use the ETi
®
250 heater gas control valve in any other Pentair pool heater. If
the ETi 250 heater gas valve is used in any other Pentair pool heater, it can create a risk of re and/or excess of
carbon monoxide, which can cause damage to the heaters, property damage, personal injury, (including brain
damage), or death. The release of carbon monoxide is colorless and odorless and may result in serious injury or
death. The ETi 250 heater gas valve is identied by the Yellow label and locking connectors.