Raypak 155C Two Speed Pumps, Pressure Switch Adjustment Range, High Limit Removal

PRESSURE SWITCH

The pressure switch, or heater actuator, insures that the heater operates only when the filter pump is in operation. It is factory set at 1.75 PSI for deck level installations. When the heater is located below the level of the spa or pool, it may be necessary to reset the pressure switch to compensate for the no-flow static head. If it is necessary to reset the pressure switch, we recommend the following procedure:

PRESSURE SWITCH ADJUSTMENT:

1.With pump and heater on, turn adjustment knob (clockwise) until a click is heard from the gas valve.

2.Turn adjustment knob (counter clockwise) 1/4" turn.

3.Turn pump off and on several times. Heater should shut off immediately. If it does not, repeat steps above until proper adjustment is made.

TWO SPEED PUMPS

In some cases, the flow on the low-speed is insuf- ficient to operate the heater. This is apparent when the pressure switch cannot be further adjusted or if the heater makes banging noises. In these cases, the pump must be run at high speed when heating the water.

CAUTION: Do not operate the heater without the functionof a properly adjusted pressure switch.

HIGH LIMITS

The heater is equipped with two automatic high limits. Set to operate at 135°F and 140°F.

NOTE: An erratic high limit is often characteristic of an internal heat exchanger problem, i.e. scale buildup, and U.G. operation. Refer to troubleshooting section.

Adjustment Knob

Fig. # 8069.1

PRESSURE SWITCH ADJUSTMENT RANGE

Heat Exchanger Height

5' Max.

5' Max. Pool or Spa

Heat Exchanger Height

Fig. # 8152.0

NOTE: If heater is installed outside of the limits shown,

aflow switch must be used in place of the pressure switch when mounted and wired adjacent to the heater.

Fig. # 8153.0

HIGH LIMIT REMOVAL

1.Shut off main electrical power switch to heater.

2.Remove inspection panels.

3.Drain heater.

4.Remove defective high limit and replace with a new high limit.

5.Reverse above procedure to re-install.

FLAME ROLL-OUT SAFETY SWITCH

The heater is equipped with a thermal cutoff device to prevent flame roll-out in the event the heat ex- changer becomes blocked. This is a "Single-use" type fusible link or thermal fuse, that must be replaced when disabled by an over temperature condition, caused by excessive restriction in the heat exchanger flue pas- sage.

Fig. #9177

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