Raypak B0507 Owner's Manual And Installation Instructions page 42

FLOW SWITCH ADJUSTMENT
The adjustment screw alters the amount of pressure or flow required to
activate the micro switch. To adjust the setting:
1. Isolate power and remove flow switch cover.
2. Loosen adjustment screw locknut.
3. Restore power and ensure circulator is operating.
4. Turn adjustment screw clockwise to decrease the amount of flow required to activate the micro switch or turn
adjustment screw anticlockwise to increase the amount of flow required to activate the micro switch.
5. Switch off circulator and ensure flow switch deactivates (contacts open). Repeat steps 1 – 5 until flow switch
operates correctly.
6. Tighten adjustment screw locknut and refit flow switch cover.
HIGH LIMIT THERMOSTAT ADJUSTMENT
The high limit thermostat (RAK-ST.1430) senses the water temperature
leaving the heat exchanger and is typically set approximately 15°C
above the electronic thermostats set point, however for high
temperature applications the setting must not exceed:

85°C for installations utilising on/off models.

90°C for installations utilising modulating models.
To adjust the high limit temperature setting:
1. Isolate power and remove high limit front cover.
2. Using a small flat bladed screwdriver, rotate the adjustment dial so
that the dial pointer aligns with the required temperature setting.
3. Refit high limit front cover and restore power.
To reset the high limit:
To reset the high limit refer to
KOL RUN ON TIMER ADJUSTMENT
The following procedure details the method of setting the optional run on timer (if
installed) for 12 minutes which is the typical setting.
1. Using a Phillips head screwdriver, rotate rough time setting adjustment screw to
desired setting. Rough time setting is typically set at 60 (min).
2. Using a Phillips head screwdriver, rotate fine time setting adjustment screw to
desired setting. Fine time setting is typically set at 2 (min).
Note: The fine time divides the value set in the rough time setting by a factor of 10.
The fine time setting then multiplies this value.
Example: For a rough time setting of 60 and fine time setting of 2.
60 ÷ 10 = 6
6 X 2 = 12 minutes.
TANKSTAT ADJUSTMENT
The following procedure details the method of setting the optional tankstat
temperature (if installed).
1. Rotate RAK tankstat adjustment dial to required set point temperature.
Note: The water heater electronic thermostat set point should be set 5º higher than the
tankstat set point to prevent the electronic thermostat contacts from opening before
the tankstat set point is reached.
"High Limit Thermostat"
COMPONENT CHECKS & ADJUSTMENT PROCEDURES
on page 34.
42