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SIM Inverter Monobloc Air-to-Water Heat Pump
Control Output Connections
110V/60 Hz Circulation Pump provides line to neutral power
(110-120VAC) of up to ve amps to operate the primary circulator
between the heat pump and the buffer tank. This is switched
by the SIM control according to the selected parameters. This
connection is located at the power input side access panel.
Caution: If the circulator is controlled by an external source, it
must still respond to a call from the heat pump, in order to allow
to operate for the unit's freeze protection. Disabling this will void
the unit warranty.
110V/60 Hz 3 Way Valve provides line to neutral power (110-
120VAC) of up to ve amps to operate a Three way Valve. This is
energized when the SIM control changes over to DHW operation.
This connection is located in the electrical compartment under
the top cover.
110V/60 Hz Hot Water Pump provides line to neutral power
(110-120VAC) of up to ve amps to operate the circulator on the
Secondary (Potable) side of the DHW heat exchanger. This is
energized when the DHW operation is active. This connection is
located in the electrical compartment under the top cover.
AUX Output is a relay contact capable of switching 24 to
240VAC at a low current to operate a contactor which engages
electric, or any supplemental heat source, according the
selected parameters. This connection is located at the power
input side access panel.
DI07 to GND on the SIM control board must be connected
to a Normally Closed over temp safety switch located at the
supplemental heat source. The switch must open if the safe
maximum temperature is exceeded, and this will immediately
open the AUX Output contacts. This feature must be employed
when any supplemental heat source is used. This connection is
located in the electrical compartment under the top cover.
The Remote Display output is a pigtail with a ve-conductor
female plug located inside the top compartment. The Display has
a short connector that can be plugged directly into this pigtail for
commissioning, and a 20m (66’) connection cable is provided to
mount the display permanently in a suitable interior mechanical
space. This cable can be extended up to 600’ by using 24 AWG
shielded ve-conductor cable and splicing it into the connection
cable.
The electrical loads given in the Specication Table, allow for a
pump load of no more than 5 amps and 110 VAC (2.5 amps at 230
VAC). If the pump load exceeds this, provide a separate power
source to the pump. DO NOT feed power to the pump from the
SpacePak air handler panel.
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