14 13
32
366mm
11
32
26mm
11
32
26mm
13
32
27mm
31
4
83mm
KWM11PRO+VCB
22 9
32
566mm
12 5
16
313mm
15 13
32
391mm
71
2
191mm
INLET 1/2"
COPPER TUBING
OUTLET 1/2"
COPPER TUBING
WIRING INPUT
24 25
32
630mm
419
32
117mm
23
8
60mm
CAT-09856-2_A
Figure 2 - KWM11 VCB
Piping
• e piping on the unit will usually be copper or any other
locally approved piping. Accessible ½” sweat ttings are
provided on the unit itself. For VCB component listing
see Figure 3.
• All piping systems should be designed by a technician
with experience in the various piping arrangements that
work with this type of unit.
• As with any system employing circulated water, the pipes
passing through unheated spaces should be insulated.
NOTE: When using mono-flo or “venturi” fittings, we
suggest placement of a ball valve just after the supply
take-off and before the return is connected.
Piping: Hot Water Boiler
• e unit supply line should be taken from the boiler side
beyond any o-control valve. If the system being used is
a gravity-ow or cast iron hot water system, a separate
circuit must be installed.
Piping: Water Heater
• To install correctly, a technician with knowledge of piping
arrangements and back-o valves must design the piping
system.
Purge and Flush Instructions
After the unit is connected to the water system, verify that
there are no leaks.
1. Close the ball valve on the outlet pipe
2. Open the ball valve on the inlet pipe
3. Remove the brass cap on the purge/flush valve
4. Connect a garden hose to the purge/flush valve and make
sure you are running the hose into a drain or large bucket
5. Open the purge/flush valve. This will purge air from the
system.
6. Continue to flush the system until all air and foreign
matter is removed.
7. Close the purge/flush valve and replace the brass cap
8. Open the ball valve on the outlet pipe.
Prior to Zone valve actuator installation both ball valves
must be open as pressure is applied to the system.
Wiring the Unit
• A eld wiring connection is provided on the unit.
Connect wires at this point only.
• e unit is manufactured with a built-in factory wired
aquastat with a set point of 140°F on and 110°F o. e
aquastat may be disabled in the eld if not required.
• For 24V wiring with transformer see Figure 4.
• For 120V wiring see Figure 5.
