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Delta-T Variable Speed, ECM High-Efficiency Circulator
SUPERSEDES: pril 7, 2014
Plant ID No. 001-4141
DESCRIPTION:
The Viridian VT2218 circulator is a temperature sensing, self-adjusting, variable
speed wet rotor circulator with an ECM, permanent magnet motor. Operating
modes include Delta-T, constant speed, set point heat, set point cool, and boiler
protection. Its high efficiency motor reduces power consumption by up to 85%
compared to equivalent C permanent split capacitor circulators.
PPLIC TION:
• Maximum operating pressure: 125 psi (862 kPa)
• Maximum water temperature: 230°F (110ºC)
• Electrical specifications:
Voltage: 110-120V, 50/60 Hz, single phase
Maximum operating power: 58W
Maximum amp rating: 0.67
• Equipped with a cast iron casing and should be used for closed
loop systems only.
• Taco circulator pumps are for indoor use only – employer uniquement a
l'interieur.
•
cceptable for use with water or maximum of 50% water/glycol solution.
FE TURES:
• 5 operating modes:
- Delta-T; variable speed, maintains constant T, provides exact GPM flow required
- Constant Speed - 4 fixed speed options, maintains constant flow for zoning
- Set Point Heat - variable speed with boiler protection option, decreases speed on temperature rise
- Set Point Cool - variable speed, increases speed on temperature rise
- Boiler Protection - protects boiler from low return temperature and flue gas condensation
• Full LCD display showing:
- Mode, speed or temperature setting, watts, supply temperature, return temperature, and error
code diagnostics.
• Use with a Taco ZVC Zone Valve Control or SR Switching Relay for ON/OFF operation.
• Integral Flow Check (IFC) is included in carton. Simply press into discharge flange if required.
• Swivel-flanged casing provides 360° rotation mounting flexibility.
• BIO Barrier
TM
protects rotor and bearings from black iron oxide.
• Whisper quiet operation (<40dB)
INST LL TION:
W RNING: Do not use in swimming pool or spa areas. Pump has not been investigated for these applications.
VERTISSEMENT: Ne pas utiliser dans une piscine ou un spa. La pompe n'a pas été étudiée pour ces applications.
C UTION: The addition of petroleum based fluids or certain chemical additives to systems using T CO equipment
voids the warranty. Consult factory for fluid compatibility.
TTENTION: L'ajout de liquides à base de pétrole ou de certains additifs chimiques à des systèmes utilisant un
équipement T CO annule la garantie. Consultez le fabricant pour connaître la compatibilité de liquides.
C UTION: Installations at elevations over 5000 feet must have higher fill pressure of 20 psi minimum to prevent
pump cavitation and flashing. Premature failure may result. djust expansion tank pressure to equal fill pressure.
larger size expansion tank may be required.
TTENTION: Des installations à des altitudes de plus de 1600 mètres doivent présenter une pression de remplissage
plus élevée de 20 psi au minimum afin d'éviter toute cavitation ou flashing de la pompe. Une défaillance prématurée
peut en résulter. Réglez la pression du réservoir d'expansion de façon qu'elle soit égale à la pression de remplis-
sage. Un réservoir d'expansion d'une taille supérieure peut être nécessaire.
Viridian VT2218
nstruction Sheet
102-483
EFFECTIVE: May 12, 2014
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Summary of Contents for Taco Viridian Delta-T
- Page 1 - Mode, speed or temperature setting, watts, supply temperature, return temperature, and error code diagnostics. • Use with a Taco ZVC Zone Valve Control or SR Switching Relay for ON/OFF operation. • Integral Flow Check (IFC) is included in carton. Simply press into discharge flange if required.
- Page 2 FIGURE 1: ZONE 1 ZONE 2 ZONE 3 PREFERRED PIPING FOR CIRCULATORS ON BOILER SUPPLY ZONE 3 ZONE 2 ZONE 1 LAST FIRST • AIR PURGING SEQUENCE BY ZONE EXPANSION TANK KEY: VI, V2, V3 = SHUT-OFF ISOL TION V LVE P = T CO CIRCUL TOR WITH IFC FF = F ST FILL BOILER FEED V LVE PV4 = PURGE V LVE...
- Page 3 FIGURE 2: PREFERRED PIPING ZONE 1 ZONE 2 ZONE 3 FOR ZONE VALVES ON BOILER SUPPLY ∆T SENSOR WIRING SUPPLY ZONE 3 ZONE 2 ZONE 1 LAST FIRST • AIR PURGING SEQUENCE BY ZONE EXPANSION TANK KEY: VI, V2, V3 = SHUT-OFF ISOL TION V LVE P = T CO CIRCUL TOR WITHOUT IFC INST LLED FF = F ST FILL BOILER FEED V LVE PV4 = PURGE V LVE...
- Page 4 Location: The circulator can be installed on the supply or return side of the boiler but for best system performance, it should always pump away from the expansion tank. See piping diagrams in Figures No.1 and No. 2. Mounting position: Circulator must be mounted with the motor in the horizontal position.
- Page 5 Typical Variable Speed pplications: Across a Series Supply Sensor Loop System Using • Delta-T Zone Valves Return - Varies speed to maintain Sensor a constant temperature Outdoor differential ( T) Sensor Supply Across Multi-Zone Sensor Radiant Manifolds with Loop Actuators Return Boiler Sensor...
- Page 6 To change operating mode and settings: a. Press and hold the SET button for 3 seconds. The operating mode on the LCD will begin to flash. b. Use the UP or DOWN buttons to scroll through operating mode options. When the desired mode flashes on the LCD, press the SET button.
- Page 7 Troubleshooting the error codes: Listed below are potential diagnostic error codes which will appear on the LCD display in case of a malfunction. ERROR CODE* DESCRIPTION CORRECTIVE CTION SENSOR 1 MISSING Supply sensor disconnected. Reconnect sensor. SENSOR 2 MISSING Return sensor disconnected. Reconnect sensor.
- Page 8 If in doubt as to whether a particular substance LL OTHER W RR NTIES, EXPRESS OR from the date of manufacture. is suitable for use with a Taco product or part, or ST TUTORY, OR NY OTHER W RR NTY...
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Questions and answers
What is the meaning of 'input voltage overload' message?
The 'input voltage overload' message for the Taco Viridian Delta-T indicates a high voltage problem. The corrective action is to check the power supply to ensure it is within the acceptable voltage range of 110-120V.
This answer is automatically generated