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Electronic Ignition Gas Valves
Manual
Shut-Off
Valve
Fig. 11: Location of Gas Pressure Adjustment
Pipe Sizing for Gas Connections
1/2 in.
Model
Input
No.
(KBTU)
N
130A
130
15
Natural Gas 1000 BTU/FT3 0.60
Specific Gravity @ 0.5 in. WC Pressure Drop
Propane Gas 2500 BTU/FT3 1.53
Specific Gravity @ 0.5 in. WC Pressure Drop
Table E: Maximum Equivalent Pipe Length
Water Connections
The heater requires water flow and positive pressure
to fire and operate properly. It must therefore be
installed downstream of the discharge side of the filter
pump. A typical installation is plumbed as follows:
1. The inlet side of the filter is plumbed directly to the
discharge side of the filter pump;
2. The outlet side of the filter is then plumbed to the
inlet of the heater; and
3. The outlet of the heater is plumbed to the return
line to the pool or spa. The pump, filter and heater
are thus plumbed in series.
Manometer
Gas Pressure Test at
Gas Valve
3/4 in.
1 in.
P
N
P
N
P
35 60 145 200 500
Plumbing from the heater back to the pool or spa must
not have any valves or restriction that could prevent
flow when the pump is operating.
Heater must be located so that any water leaks will not
damage the structure of adjacent area. PVC pipe may
be glued directly into optional or field-supplied header
unions.
Flow Rates
Model No.
130A
*When flow rates exceed maximum 70 gpm, an external auxiliary
bypass valve is required. See External Auxiliary Bypass Valve sec-
tion for details.
Table F: Water Flow Rates
Polymer Headers
Before attaching the optional 2-inch unions to the
In/Out header, make sure the O-rings are properly
seated in the grooves. Use AquaLube or equivalent
non-petroleum-based lubricant on the O-ring. Hand
tighten the unions. Glue PVC piping directly to the
unions.
Drain Plug
Fig. 12: In/Out Header for 2" Installation
Fig. 13: Optional In/Out Header for 1-1/2"
or 1-1/4" Hose Connection
13
Min. gpm
Max gpm*
20
70
In/Out Header
O-Ring
Tail Piece
Nut
In/Out Header
Hose Connector
2" Pipe
Hose
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