Instructions / Assembly
5
5. Start the circulator:
When purging the system, it is recommended to run the circulator at full speed long enough to remove remaining air from the bearing
chamber. This is especially important when installing the circulator in the off-season.
Full Speed Operation:
To run the pump at full speed during the fast fill, start-up and purge process, rotate dial to MAX speed setting. To return to the normal
operating mode, turn dial to desired fixed speed, constant pressure, or proportional pressure setting.
6. Programming your VR1816 circulator:
Note: The VR1816 is factory-programmed for maximum speed operating mode. If this is your desired operating mode, no pro-
gramming changes are required.
To change operating mode and settings:
Modify the performance of the circulator as needed by rotating the dial using a flat screwdriver. A blue, orange or green LED will
illuminate when the circulator is powered on. The LED will flash each time mode is changed. See diagrams below to determine best
mode of operation for the system.The selection of the right functioning curve depends on the characteristics of the heating sys-
tem and the actual heat demand.
CAUTION: Never run the circulator dry or permanent damage may result.
ATTENTION: Ne laissez jamais le circulateur tourner à sec, des dommages permanents peuvent en résulter.
The VR1816 has 3 Operating Modes:
• Fixed Speed ( ) - Infinitely adjustable settings (MIN-MAX).
• Constant Pressure ( ) - Varies speed to maintain a constant pressure differential.
• Proportional Pressure ( ) - Varies speed to maintain a proportional/variable pressure differential.
Min
Max
Q(gpm)
012 3 4567 8 910111213141516
H (ft)
0
2
4
6
8
10
12
14
16
18
20
Q (l/s)
0.0 0.2 0.4 0.6 0.8 1.0 1.2
H (m)
0
1
2
3
4
5
6
Q (m
3
/h)
4
3
2
1
0
0015 – Hi
008
0015 – Med
007
0015 – Low
006
003
Flow
Head in Feet
FIXED SPEED MODE ( ) –
Infinitely Adjustable (MIN-MAX)
Fixed speed mode ( ) allows the installer to fine tune the circulator flow rate to precisely match design load conditions.
It is infinitely variable between MIN/MAX settings. See chart above for equivalent 00 model at each variable speed setting.
Shaded area represents full
operating range.
Blue
LED
min -
max
4. Wiring the circulator: Disconnect AC power supply. Remove terminal
b
ox cover. Attach a wiring connector into knockout hole. Use flexible conduit
only. Connect Line/Hot power to the black lead, Neutral to the white lead.
See wiring diagram.
Note: If pigtail leads provided are not used, be sure to trim field wire to a
strip length of .25" (+/- .025") to prevent exposed wire causing a short at the
terminal plug. Connect line and neutral to green terminal plug as shown in
d
iagram. Depress the spring tab with a small screwdriver to insert wire into
plug. Release tabs to complete connection. The VR1816 is a double insulat-
ed circulator, no grounding wire is necessary. Replace terminal box cover.
N
EUTRAL
T
LN
Green Terminal Plug
Spring Tabs
WIRE NUT
WHITE
BLACK
L
INE
No ground wire is required
Terminal Box
VR1816 PERFORMANCE CURVES