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FRONT PANEL ADJUSTMENTS (Fig. 19)
TIMER/
PROGRAMMER
FUNCTION
SWITCH —
RATIO
ADJUSTMENT
PARALLEL
SHIFT
ADJUSTMENT
■SETBACK
TEMPERATURE
ADJUSTMENT
SKETCH ABOVE SHOWS A PROPORTIONAL +
INTEGRAL (P + I) CONTROLLER. WHEN THE
AQUATROL IS CONVERTED TO AN ON/OFF
CONTROLLER THE DECAL (LEFT, SUPPLIED)
MUST BE APPLIED OVER THE EXISTING
DECAL.
El 055
FIG. 19—AQUATROL FRONT PANEL ADJUSTMENTS.
TIMER/PROGRAMMER
-IMPORTANT-
ALWAYS TURN TIMER CLOCKWISE.
Timer programming is based on a 24-hour or a 24-hour,
7-day system.
1. Insert red (1) pins in grooves opposite day and hour
that each occupied period is to start.
2. Insert blue (0) pins opposite day and hour that each
setback (unoccupied) period is to start.
3. Turn the outer ring CLOCKWISE to set the day and
time (24-hour scale) opposite the white triangle.
4. Turn center knob CLOCKWISE to set exact time on
the 12-hour inner dial.
FUNCTION SWITCH
In the proportional plus integral mode, the function
switch provides a choice of manual or automatic valve
operation, and manual override of the timer program as
follows:
1. Valve closed-boiler side of valve is closed, pro¬
ducing continuous bypass of the system (heat off).
2. Valve stop—power is removed from the actuator,
leaving the valve in an intermediate position.
3. Valve opened—actuator is driven to the open
position, providing no mixing of return water (heat on).
4. Automatic—normal operating position, allowing the
timer/programmer to switch between occupied and
unoccupied settings.
5. Continuous occupied setting—overrides setback,
providing constant comfort discharge water tem¬
perature.
6. Continuous unoccupied setting—overrides tim¬
er/programmer, providing constant setback discharge
water temperature.
9
63
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2036—4
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