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•
Optional Zone Control Input:
The unit can
accept external “Call For Heat” input signal. This
must be a powered signal (20 to 30 V AC .1 VA).
This function can be enabled by a DIP switch.
•
Warm Weather Shut Down (WWSD):
When the
outdoor air temperature is warmer than 70°F (with
±1°F hysteresis), the unit shuts down until the
temperature drops below 70°F.
Summer Service Instructions
When the outdoor temperature is greater than 70
o
F and
the warm weather shutdown (WWSD) feature is active,
the pump will normally not be in operation. To allow the
pump to be tested, disconnect one of the wires from
the air temperature sensor in the control box. This will
simulate an open circuit in the outdoor sensor and the
control assumes an outdoor temperature of 30
o
F. This
will allow the pump to operate for testing and/or service.
Remember to re-connect the outdoor temperature sensor
wire when finished.
3.
Pump Installation
Warning:
Consult piping manufactures
for material selection before installing
this pump. Absence of pumping fluid
may damage some piping materials.
Caution:
Thoroughly clean and flush the system prior
to pump installation
Pump: For Indoor Use Only
Variable speed injection systems require complete
isolation between the boiler loop and system loop.
For example, when the injection pump is turned off,
there must be no heat transfer from the boiler loop to
the system loop. In order to avoid this unwanted heat
transfer, review standard primary-secondary piping
techniques described below. See figure 1.
