Raypak P-R185B To P-R405B - Manual (Page 19)

19
High temperature CPVC Header Flanges and header
Flange Nuts are provided. If there is any possibility of
back- siphoning when the pump stops, it is suggested
that a check valve (or valves) also be installed in the
system.
INLET/OUTLET HEADER (Polymer)
CONNECTIONS (POLYMER HEADER)
Before attaching the 2-inch unions to the inlet/outlet
header, make sure the o-rings are properly seated in the
grooves. Use AquaLube or equivalent non-petroleum
based lubricant on the o-ring. Tighten the unions hand
tight. Glue PVC piping directly to the unions.
PLUMBING FOR WATER CONNECTIONS
HEATER LOCATION-Relative to the pump and filter
The RP 2100 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.
Plumbing from the heater back to the pool 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 header unions.
FLOW RATES
MODEL PIPE SIZE MIN.GPM *MAX.GPM
185 1-1/4"-1-1/2" - 2 20 125
265 1-1/4"-1-1/2" - 2 25 125
335 1-1/4"-1-1/2" - 2 35 125
405 1-1/4"-1-1/2" - 2 40 125
ASME-Cast Iron
Header Flange Nut
(CPVC)
Inlet
Header Flange
(CPVC)
Flange Gasket
Fig. #2002.1
POLYMER HEADERS
CAUTION: An additional source of heated water, i.e.
a solar system, must be connected to the main line
ahead of the heater inlet pipe in order for it to act as the
primary heat source. If the primary system provides
adequate heat to maintain set-point, the RP2100
heater will not fire. Be advised that the RP2100 control
panel will then display sensed water temperatures
downstream of the primary heating system, rather than
the temperature of the water exiting the pool.
*When flow rates exceed maximum GPM an external
auxiliary bypass valve is required. See external bypass
valve section for details.