Pentair ETi 250 - Gas Pipe Sizing; Gas Pipe Escutcheon

ETi 250 High Efficiency Pool and Spa Heater Installation and User’s Guide
24
GAS PIPE ESCUTCHEON INSTALLATION
Required Parts: P/N 467107, Gas Pipe Escutcheon (PVC), P/N 270114, Phillips Retention Screw (#8)
1. IMPORTANT! Turn off the electrical supply to the heater and turn off the pump.
WARNING! Risk of re or explosion. Never test for gas leaks with an open ame.
The following escutcheon installation instructions are intended for a new pool installation only, not for retrot purposes.
2. When installing the ¾” pipe into the gas valve, place the gas pipe escutcheon over the pipe so that the larger circle
is facing the heater’s service panel and the smaller circle with the screw is facing away for the heater service panel
(toward the union) as shown in Figure 19.
3. Slide the escutcheon ush against the outside of the heater service panel and the gas pipe opening. Be sure to
completely cover large gas pipe opening in the panel to prevent rodents to gain access to the inside of the heater.
4. Hand-tighten the retention screw to secure the escutcheon in place.
5. Safety check the gas pipe for leaks as instructed in BASIC SYSTEM OPERATION, page 12.
GAS PIPE SIZING
Table 2: Note (*) A 3/4” gas line can be used for up
to 2 ft (61 cm) maximum length from the gas valve
in addition to the sediment trap.
STAGE TWO LOW PRESSURE GAS PIPE SIZING
Maximum Equivalent Pipe Length (ft)
Natural Gas 1000
BTU/FT
3
0.60 Specific Gravity at 0.5 in. WC Pressure Drop
Propane Gas 2500
BTU/FT
3
1.50 Specific Gravity at 0.5 in. WC Pressure Drop
Input
Model (KBTU)
ETi
250
250
1/2” 3/4” 1” 1-1/4” 1-1/2”
N N P N P N P N P
*
10 20 50 60 200 200 550
600
P
*
Installation
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
A
Flange installed on the
gas pipe. Be sure the ange
covers the circular opening in
the heater panel.
Figure 19. Gas Pipe Escutcheon Installation
Gas Pipe
Flange
Screw
Round knock-out
removed from panel