5
WARNING:
Wiring connections must be made in accordance with all applicable electrical codes.
CAUTION:
To prevent electrical shock, disconnect electric power to system at main fuse or circuit breaker box until
installation is complete. When a service switch is installed, more than one disconnect switch may be
required to deenergize this device for servicing.
DIP switch 2 = Off DIP switch 2 = On
Minimum Variable Speed Output
DIP switch 5 = On
62%
18%
42%
8%
DIP switch 5 = Off
Minimum Variable Speed Output
When the 00-VS is configured for
∆
T Target operation and
reverse acting mode, a minimum variable speed output is incor-
porated during operation. In this case the variable speed output
is adjusted between the selected minimum variable speed
output percentage and full output. Select from the four different
minimum variable speed output percentages in the table to the
side. The 00-VS also provides full output for 30 seconds when
the Heat Request appears, then resumes normal operation.
Note: Minimum variable speed output is not available when
configured for
∆
T Target operation and Direct Acting Mode.
Exercising
During long periods of no operation, the 00-VS is designed to exercise for 10 seconds every 3 days of no operation in order to prevent
precipitate build-up in the pump. The % OUT LED turns on during the exercising function.
Powering the control
Insert the line voltage wires through the knockout of the enclosure and connect the live wire to the H terminal and the neutral wire to
the N terminal on the PC Board. Ensure that no power is present during this process.
Heat Request
The heat request signal may be provided by jumpering the heat request (HT Req) terminals or by applying 24 V (ac) to the HT Req ter-
minals. This signal may come from zone valve end switches, Taco ZVC/SR series zone controls, or thermostats. When a thermostat is
connected directly to the heat request terminals, use dry contact style. (i.e. mechanical, digital hard wired or digital battery operated)
Sensors
Do not apply power to these terminals as this will damage the PC Board. The wiring terminals for the sensors may be removed for
ease of installation.
Do not run the wires parallel to telephone or power cables. If the sensor wires are located in an area with strong sources of electro-
magnetic interference (EMI), shielded cable or twisted pair should be used or the wires can be run in a grounded metal conduit. If using
shielded cable, the shield wire should be connected to the Com terminal on the PC Board and not to earth ground.
System and Boiler Return Sensors
The sensors can be strapped directly to the pipe using a cable tie. Insulation should be placed around the sensor to reduce the effect
of air currents on the sensor measurement. The sensors should be placed downstream of a pump or after an elbow or similar fitting.
This is especially important if large diameter pipes are used because the thermal stratification within the pipe can result in erroneous
sensor readings. Proper sensor location requires that the fluid is thoroughly mixed within the pipe before it reaches the sensor.
If the system sensor is used to measure duct (air) temperature, the sensor should be mounted in such a manner that it measures the
average duct outlet temperature.
System Sensor (S1)
Connect the two wires from the system sensor (S1) directly into the Com and
Wiring and Sensor Installation
S2 terminals on the PC Board.
System Sensor (S2)
Connect the two wires from the system sensor (S2) directly into the Com
and S2 terminals on the PC Board.
Boiler Return Sensor (S3)
Connect the two wires from the boiler return sensor directly into the Com
and S3 terminals on the PC Board.
