Taco 00-VS Instruction Sheet

SUPERSEDES: May 1, 2010
Plant ID# 001-3811
The Variable Speed - Setpoint "00" Cartridge Circulator (00-VS) is a microprocessor-based pump designed to regulate the tempera-
ture to a system through variable speed injection mixing. The 00-VS regulates the temperature to provide a fixed setpoint or a fixed
temperature difference (∆T) for heating or cooling applications. For fixed setpoint operation, a boiler return sensor can be connected
to protect the boiler against flue gas condensation.
In order to properly accomplish this mixing method, the following piping details should be considered.
Applications
The following are typical applications the 00-VS supports. The 00-VS includes a five DIP package with DIP siwtches 1, 3 and 5 used
to configure the control for a given application. These DIP switch configurations are indicated to the right of the application drawing.
DIP switch 2 is used to select the appropriate temperature range for the desired setpoint target. DIP switch 4 is used to select the
controls variable speed output response. It is recommended that a normal response (DIP 4 = Off) is used. This will aid in reducing
potential thermal expansion issues in a system. If it is desired for the control to achieve the setpoint or ∆T target quicker, a more
aggressive variable speed output response can be selected by setting DIP switch 4 to On.
00-VS-1
Supply
Sensor
(S1 or S2)
The 00-VS adjusts the variable speed output to the P1 pump to maintain a setpoint temperature at the supply sensor whenever
a heat demand is present. While the control is operating to maintain the setpoint temperature, the variable speed output is also
adjusted to ensure the boiler inlet temperature is above the boiler inlet minimum setpoint.
00-VS-2
The 00-VS adjusts the variable speed output to the P1 pump to maintain at least a setpoint temperature at the boiler sensor (S3)
whenever a heat demand is present. The control adjusts the variable speed output towards zero speed as long as the temperature
is above the setpoint.
00-VS-3
The 00-VS adjusts the variable speed output to the P1 pump to maintain at least a setpoint temperature at the boiler sensor
(S3) whenever a heat demand is present. The control adjusts the variable speed output towards full speed as long as the
temperature is above the setpoint. Note: This application illustrates variable flow conditions through the boiler. This con-
trol configuration should only be used with a heat source which is not flow sensitive, such as a high mass cast iron boiler.
00-VS-4
Duct
Sensor
(S1 or S2)
The 00-VS adjusts the variable speed output to the fancoil pump P1 to maintain a setpoint discharge air temperature at the duct
sensor whenever a heat demand is present. While the control is operating to maintain the setpoint temperature, the variable speed
output is adjusted to ensure the boiler inlet temperature is above the boiler inlet minimum setpoint.
Instruction Sheet
Variable Speed - Setpoint (00-VS)
"00" and Load Match
"00-VS"
Boiler
P1
Sensor (S3)
P1
Boiler
Sensor (S3)
"00-VS"
Boiler
P1
Sensor (S3)
"00-VS"
P1
Boiler
Sensor (S3)
Cartridge Circulators
®
DIP 5 = Off (Linear Output Characteristic)
DIP 3 = Off (Direct Acting)
DIP 1 = Off (Setpoint Target)
On Off
DIP 5 = Off (Linear Output Characteristic)
DIP 3 = On (Reverse Acting)
DIP 1 = Off (Setpoint Target)
On Off
DIP 5 = Off (Linear Output Characteristic)
DIP 3 = Off (Direct Acting)
High Mass
DIP 1 = Off (Setpoint Target)
Boiler
On Off
DIP 5 = On (Equal Percentage Output Characteristic)
DIP 3 = Off (Direct Acting)
DIP 1 = Off (Setpoint Target)
On Off
1
102-143
EFFECTIVE: October 1, 2010
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