Product Overview
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Blue LED
PROPORTIONAL
PRESSURE MODE
CONSTANT
PRESSURE MODE
FIXED SPEED
MODE
PC
min -
max
The VR1816 is factory-programmed for Max Speed
Setting. Simply turn the dial to change speed,
operating mode or pressure setting.
Min
Max
Q(gpm)
H (ft)
Q (l/s)
H (m)
Q (m
3
/h)
0015 – Hi
008
0015 – Med
007
0015 – Low
006
003
Flow
Head in Feet
5
10
15
Max
Q(gpm)
H (ft)
20
Q (l/s)
H (m)
Q (m
3
/h)
008
0015 – Med
007
0015 – Low
006
Flow
Head in Feet
Low
Med
High
Max
Q(gpm)
H (ft)
20
Q (l/s)
H (m)
Q (m
3
/h)
Flow
Head in Feet
Fixed Speed Mode (Min/Max)
Constant Pressure Mode
Proportional Pressure Mode
Fixed speed mode allows the installer
to ne tune the circulator ow rate
to precisely match design load
conditions. It is innitely variable
between min/max settings.
Ideal for zoning with circulators.
See chart to the left for equivalent 00®
model at each variable speed setting.
In constant pressure mode, the
circulator maintains a constant pressure
dierential (Δp-c) in the system as
heating load increases or decreases.
Selection options are 5, 10, or 15 feet
of head constant pressure.
Best option for zoning with zone valves.
See chart to the left for equivalent
the 00® model at each setting.
In proportional pressure mode, the
circulator maintains a proportional
pressure dierential (Δp-v) in the
system as heating load increases
or decreases. Flow will change in
relationship to the change in
pressure dierential.
Best option for panel radiators with
thermostatic radiator valves (TRV).
Selection options are Low, Medium,
or High. If unsure on proper setting,
select Medium and adjust as needed.
Modes & Performance