Test And Adjustments - Pentair MiniMax Plus Service Manual

Tests and Adjustments
1. Push power switch off.
2. Turn gas valve knob off.
3. Remove pressure tap plug.
4. Attach the Manometer.
5. Turn gas valve knob on.
6. Push power switch on.
7. Fire heater and read Manometer.
MiniMax Gas Pressure Requirements
Maximum inlet gas pressure
Minimum inlet gas pressure
Normal Manifold pressure
** 6 WC for model 400
These measurements must be read while
heater is firing.
NOTE: If pressure is low, check meter and line size.
Heaters installed below water level require
adjustment of the pressure switch.
1. Backwash filter and clean the pump hair and lint
basket before making any adjustment to the pressure
switch.
2. Switch the circulation pump on and make sure it is
primed.
3. Push the heater power switch on and set the
thermostats to their highest temperature settings.
4. Clean the locktight off of the pressure switch
adjustment knob threads.
5. Turn the adjustment knob clockwise or away from
the micro-switch, until the heater shuts down.
Clockwise
6. Turn the adjustment knob counter-clockwise 1/2 turn
and the heater should refire.
7. Turn the pump off and the heater should shut down.
If heater does not shut down, repeat procedure.
8. Switch pump off and on several times to assure
proper adjustment.
NOTE
If pool is more than 1 floor above or one floor
below, the pressure switch may have to be
replaced with a flow switch.
Rev. C 12-1-00
Natural Propane
10" WC 14" WC
5" WC** 12" WC
4" WC 11" WC
Counter-Clockwise
ON
OFF
VENT TEST
A quick check of your
venting installation.
Allow heater to operate
for 15 minutes. Close
the doors in the room,
then strike a wooden
match and blow out the
flame. With the match
smoking, hold next to
the draft hood. If the
smoke is pulled up into
the vent and out of the room, the venting is correct.
If it does not, you must make venting corrections.
3 5
P/N 38033