STA-RITE SR400NA - Water Flow Through the Heater

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SECTION ONE – Heater Design and Function

1. The pool or spa circulating pump supplies water to

the heater through the II

2. Water passes to and from the heater through 2”

PVC piping to the MM

and the MM

3. ASS

in the

Manifold bypasses water in excess of that required

by the Heat Exchanger.

4. The MM

distributes water to the indi-

vidual tubes of the HH

5. Water is heated in the coils of the Heat Exchanger

and returned to the Manifold Adapter.

6. The TT

controls the flow of water

out of the Heat Exchanger to maintain a water out-

let temperature above 120˚ F (49° C).

7. The water flows from the OO

to the pool or spa.

1-6

Primary

Heating

Coils

Secondary

Heating

Coils

Inlet

(Cold

Water)

Outlet

(Warm/

Mixed

Water)

Water Flow Through the Heater

Figure 1-6: Water Flow

Table 1

Risk of heater damage and flooding.

Do not attempt to operate heater unless water flow

through heater is within prescribed limits. See Table 1,

“Maximum and Minimum Flow Rates in GPM” below.

Heater installed above pool/spa water level should

have no flow restricting or shutoff valves in system.

Heaters installed below pool/spa water level should

have isolation valves to allow servicing.

Maximum and Minimum Flow Rate in GPM (LPM)

Model Minimum Flow Maximum Flow

200 20 (76 LPM) 120 (454 LPM)

333 33 (114 LPM) 120 (454 LPM)

400 40 (151 LPM) 120 (454 LPM)

STA-RITE SR400NA - Water Flow Through the Heater

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