Raypak RAYTHERM P-926 User Manual download pdf (Page 18)

External Auxiliary Bypass

Valve (Where Required)

926-1223 Models Only

n auxiliary bypass valve should be used when flow

rates exceed 120 gpm (usually a high performance

pump size larger than two HP will exceed this flow

rate). This valve is required to complement the func-

tion of the automatic bypass valve, particularly when

starting the heater in winter or early spring when the

spa or pool temperature is below 55°F. It also serves

to eliminate needless pressure drop through the

heater and accompanying reduction in the flow rate to

the spa jets, etc.

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 comfort-

able to the touch. If pipe is hot, close bypass; if cold,

open bypass.

Models 926-1223

The heater is also equipped with a manual bypass

built into the header. This is in addition to the automat-

ic bypass valve. This may be used with flow rates up

to 120 gpm and adjusted as below.

Temperature Controls

High Limits

The pool heater is equipped with two high limits. Both

high limits, the non-adjustable auto reset high limit and

adjustable manual reset high limit are attached to the

outlet side of the in/out header.

Pool Stat

The pool heater is equipped with a pool thermostat

that is attached to the inlet side of the in/out header to

control the pool temperature.

From Heater

To Heater

To Pool

From Filter

Fig. 23: Auxiliary Bypass Valve

NOTE: Do not use a gate valve as an auxiliary

bypass valve on any heaters.

NOTE: Sooting or liming caused by improper

bypass adjustment voids the warranty.

ypass Valve

Open Position Closed Position

Fig. 24: Manual Bypass Valve

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 shut-off

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.

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Raypak RAYTHERM P-926 User Manual Page 18

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