Install Instructions

ManualsBrandsTaco Manuals00 Series Bronze Circulator Pumps006 Variable Speed Solar Control Bronze Circulator (3/4" Sweat) 1/40 HP

Instruction Sheet

Variable Speed - Solar (00-VT)

“00” and Load Match

Cartridge Circulators

102-358

SUPERSEDES: May 1, 2010 EFFECTIVE: October 1, 2010

The Variable Speed - Setpoint “00” Cartridge Circulator (00-VT) is a microprocessor-based pump designed to regulate the temperature

difference between a solar thermal collector and storage tank through variable speed injection mixing.

Applications

The following are typical applications the 00-VT supports. The 00-VT includes a five DIP package with DIP switches 1 and 2 used to

configure the control for a given application. DIP switch 3 is used to select the drainback feature. DIP switch 4 is used to select the

intermittent freeze protection feature. DIP switch 5 is used to select whether one or two storage tanks are used.

Plant ID# 001-3921

Tank

Sensor

Collector

Sensor

Solar Collector

Essential Switch Settings

5 = OFF (Single Storage Tank)

1 = OFF, 2 = OFF (Heat Exchanger)

The 00-VT adjusts the variable speed output to the collector

pump P1 to maintain a setpoint temperature difference (ΔT)

between the collector sensor and the tank sensor.

00-VT-1: Single Storage Tank

Tank

Sensor

Collector

Sensor

Solar Collector

Essential Switch Settings

5 = OFF (Single Storage Tank)

1 = OFF, 2 = OFF (Heat Exchanger)

The 00-VT adjusts the variable speed output to the collec-

tor pump P1 to maintain a setpoint temperature difference

(ΔT) between the collector sensor and the tank sensor. A

heat exchanger is included to isolate the collector from the

storage tank. The storage tank pump P2 operates in parallel

with the collector pump P1.

00-VT-2: Single Storage Tank, Heat Exchanger

Collector

Sensor

Solar Collector

Tank

Sensor

Essential Switch Settings

5 = OFF (Single Storage Tank)

2 = OFF, 1 = ON (Tank Supplement)

The 00-VT adjusts the variable speed output to the collector

pump P1 to maintain a setpoint temperature difference (ΔT)

between the collector sensor and the tank sensor. A boiler

is included to supplement the storage tank. The boiler and

boiler pump P2 operate independently from the collector to

maintain the storage tank at a setpoint temperature.

00-VT-3: Single Storage Tank, Storage Tank Supplement

A Taco resource – saving product

Summary of content (8 pages)

PAGE 1
Instruction Sheet 102-358 Variable Speed - Solar (00-VT) “00” and Load Match® Cartridge Circulators SUPERSEDES: May 1, 2010 EFFECTIVE: October 1, 2010 Plant ID# 001-3921 The Variable Speed - Setpoint “00” Cartridge Circulator (00-VT) is a microprocessor-based pump designed to regulate the temperature difference between a solar thermal collector and storage tank through variable speed injection mixing. Applications The following are typical applications the 00-VT supports.
PAGE 2
00-VT-4: Single Storage Tank, Auxiliary Heat Sink c t o r Essential Switch Settings 5 = OFF (Single Storage Tank) 2 = ON, 1 = OFF (Collector Sink) R1 S o la r C o ll e Collector Sensor Tank Sensor The 00-VT adjusts the variable speed output to the collector pump P1 to maintain a setpoint temperature difference (ΔT) between the collector sensor and the tank sensor. An auxiliary heat sink is included to accept heat in the event both the storage tank and the collector become too hot.
PAGE 3
Manual Operation The 00-VT includes a manual override feature that turns on all outputs including the collector pump at full speed for up to a 24 hour period. The manual override feature is activated by creating an open circuit with both the source sensor and the tank sensor after both sensors have been installed without an error condition.
PAGE 4
Heat Exchanger When the application is configured for heat exchanger, the auxiliary relay is used to operate a pump that provides flow from the heat exchanger to the storage tank. A heat exchanger may be included to isolate the fluid in the storage tank from the fluid in the collector. In this application configuration, the auxiliary relay operates in parallel with the collector pump.
PAGE 5
The holiday feature is activated when the holiday terminal is connected to the sensor common terminal. Once activated, the control adjusts the collector pump to full speed, and if applicable, turns on the auxiliary relay when the storage tank temperature is greater than storage tank maximum temperature and the storage tank temperature is 10°F warmer than the collector temperature. The output(s) then remain on until the storage tank temperature drops to 130°F.
PAGE 6
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.
PAGE 7
LED Status LED LED Status 00-VT Status PWR LIMIT HOLIDAY MAX TANK % OUT MAX TANK HOLIDAY Solid Solid Solid Solid Flash (Solid) Flash Flash LIMIT Flash PWR Flash PWR, Holiday Flash Limit, Holiday Flash PWR, Limit Flash Power On Limit Input present Holiday feature enabled (holiday terminal connected to sensor common terminal) Maximum Tank temperature condition Current variable speed output (100% speed) Tank sensor error. Control will not operate when error present.
PAGE 8
Replacing Integral Flow Check (IFC) Assembly (if applicable) 1. Disconnect the electrical supply. 2. Reduce system pressure to 0 psi and allow system to return to room temperature. Isolate the circulator by closing the service valves 3. 4. 5. 6. 7. or draining the system. Remove the body bolts and swing motor assembly away from the body. Remove IFC, using needle nose pliers. Install replacement IFC by pressing valve into casing until it is firmly seated.