4
ACCEPTABLE MOTOR MOUNTING POSITIONS
CASING ROTATION
To rotate the casing, remove the 4 motor screws and spin the
casing to the desired flow direction. Reattach the 4 screws
(
5
⁄
32
" allens wrench required). Be sure body gasket is seated
evenly to prevent leakage. Tighten motor screws to 34-42 in-
lbs torque.
Position electrical knockout at 6 o’clock position for best programming and LCD viewing orientation. Casing
may be rotated to change flow direction.
Across a Series
Loop System Using
Zone Valves
M
M
Return
Sensor
M
Across Multi-Zone
Radiant Manifolds
with Loop Actuators
iS
erie
s-R
B
C
A
B
C
A
M
M
M
M
M
M
M
M
Outdoor
Sensor
Boiler
Sensor
Supply
Sensor
Supply
Sensor
Return
Sensor
Boiler
Return Sensor
Boiler Protection By-Pass
Duct
Supply
Sensor
Fan Coil Fixed Temperature
Typical Variable Speed Applications:
Supply
Sensor
Boiler Return
Sensor
Mixing
Radiant Injection Set Point with Boiler Protection Option
• Delta-T
- Varies speed to maintain
a constant temperature
differential (∆T)
• Set Point Heat
- Varies speed to maintain
a fixed temperature
• Boiler Protection Option
- Decreases speed to protect
boiler from low return water
temperature and flue gas
condensation
• Boiler Protection
- Increases speed to protect boiler from low return
water temperature and flue gas condensation
• Heating or Chilled
Water Cooling
• Set Point Heat
- Decreases speed
on temperature rise
• Set Point Cool
- Increases speed on
temperature rise
1. Location:
The circulator can be installed on the supply or return side of the boiler but for best system performance, it should always pump
away from the expansion tank. See piping diagrams in Figures No.1 and No. 2.
Integral Flow Check (IFC
®
) option
- An IFC
®
is included in the carton. If required, press IFC into machined discharge port with plunger
and o-ring facing in, until it snaps into place. Before installing, press IFC plunger to be sure it moves freely. See diagram below.
2. Mounting position:
Circulator must be mounted with the motor in the horizontal position. See diagrams below for acceptable motor mounting orientations.
CAUTION: Do not use flat rubber gaskets. Only use O-ring gaskets provided or leaks may result. Warranty will be void.
