21
Flow Rates
PIPE SIZE*
MIN. GPM (lpm) MAX. GPM** (lpm)
1-1/4", 1-1/2", 2"
40 (151)
125 (473)
* Must maintain minimum flow rate. Pipe size may further restrict flow.
** When flow rates thru the heater exceed maximum allowable GPM,
an external auxiliary bypass valve is required. See "External
Auxiliary Bypass Valve" for details.
Table M. Flow Rates
External Automatic Bypass Valve
An external automatic bypass valve is provided with
the heater. The bypass valve automatically responds to
changes in water flow in the piping system. The proper
amount of water flow is maintained through the heater
under varying system flows dictated by the conditions of
the pump and filter.
BYPASS
VALVE
BYPASS
SPRING
F10331
Figure 17. External Automatic Bypass Valve
External Auxiliary Bypass Valve
(Where Required)
An auxiliary bypass valve should be used when flow rates
exceed 125 GPM (473 lpm). Usually a high-performance
pump larger than two horsepower will exceed this flow
rate. This valve is required to complement the function
of the automatic bypass valve, particularly when starting
the heater in winter or early spring when the spa or
pool temperature is below 50°F (10°C). It also serves to
eliminate needless pressure drop through the heater and
accompanying reduction in the flow rate to the spa jets,
etc.
FROM HEATER
AUXILIARY BYPASS VALVE
(DO NOT USE GATE VALVE)
TO HEATER
TO POOL/SPA
FROM POOL/SPA
Figure 18. Auxiliary Bypass Valve
Auxiliary Bypass Valve Adjustment
To Set Bypass: With Clean Filter, Adjustment Is Made
By Feeling The Inlet And Outlet Pipes At The Heater.
Outlet Pipes Should Be Slightly Warmer Than Inlet And
Comfortable To The Touch. If Pipe Is Hot, Close Bypass; If
Cold, Open Bypass.
Pressure Relief Valve Piping
The heater is supplied with a pressure relief valve, sized
for the maximum output of the heater, and set at 125 psig.
The pressure relief valve outlet must be plumbed to a safe
point of discharge.
FIELD
SUPPLIED
FIELD
SUPPLIED
PRV
F10332
Figure 19. PRV Piping
NOTE:
To avoid water damage or scalding due to valve
operation, drain pipe must be connected to valve outlet
and run to a safe place of discharge. Drain pipe must
be the same size as the valve discharge connection
throughout its entire length and must pitch downward
from the valve. No shutoff valve shall be installed
between the relief valve and the drain line. Valve lever
should be tripped at least once a year to ensure that
waterways are clear.
APPROVED
UNCONTROLLED DOCUMENT IF PRINTED
Summary of Contents for Raypak X94 SR-410
Page 26: ...26 5 WIRING DIAGRAM APPROVED UNCONTROLLED DOCUMENT IF PRINTED...
Page 42: ...42 Control Logic Flow Chart Pool Spa Modes APPROVED UNCONTROLLED DOCUMENT IF PRINTED...
Page 43: ...43 10 ILLUSTRATED PARTS LIST APPROVED UNCONTROLLED DOCUMENT IF PRINTED...
Page 51: ...51 NOTES APPROVED UNCONTROLLED DOCUMENT IF PRINTED...
