48297 1 Taco Hec 2 Brochure User Manual

User Manual: Pump 48297 1 Taco Hec-2 Brochure

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©Taco Catalog #100-101 Eective Date: 10/15/12

Supersedes: New Printed in USA

The Bumble Bee (model HEC-2) represents the very latest in variable speed wet rotor

circulator technology. Its high efficiency ECM motor uses up to 85% less electricity than

a standard circulator, and its out-of-the-box settings and 360˚ swivel flange makes it a

breeze to install. Most importantly, the Bumble Bee’s Delta-T variable speed technology

maximizes the overall efficiency of your heating system. The Bumble Bee is engineered

for energy savings, ease of installation, versatility in the field and ultimate comfort.

High-Efficiency Variable Speed Circulator

Water Circulation

Pumps & Circulators

GPM

WATTS

GPM

WATTS

GPM

WATTS

CP - Constant Power (Fixed Speed)

Allows for 4 fixed circulator speeds.

SP - Setpoint (Variable Speed)

Allows for a fixed supply temperature from 65°F to 220°F.

dE - Delta-T, Differential Temperature (Variable Speed)

Allows for a fixed system temperature differential

(∆T) from 5°F to 50°F.

Factory Pre-Set for Delta-T mode @ 20˚F

∆T

• HighefciencyECMMotor

• Reducespowerconsumptionbyupto85%

• FullyProgrammable

• Plug-inremotetemperature  

 sensorsincluded

• LEDdisplaysreal-timemode,  

 wattusageandGPMow

• 360˚swivelange

• Nutcapturefeatureonanges

• IntegralFlowCheck   

 (IFC®)included

Operates in Three Modes

360˚ Swivel Flange for universal fit-up

Features & Operation

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

FLOW-M

3

/H

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

TOTAL HEAD - FEET

TOTAL HEAD - METERS

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

0 2 4 6 8 10 12 14 16

Speed 1

Speed 2

Speed 3

Speed 4

1

2

3

4

4

3

1

2

Supply

Sensor

Duct

Supply

Sensor

Supply

Sensor

HEC-2

Radiant injection mixing

Delta-T

Across a series loop

system using zone valves

Delta-T

Across multi-zone radiant

manifolds with loop actuators

Boiler protection by-pass

Fan coil fixed temperature

Setpoint

Setpoint

Setpoint

M

M

M

B

C

A

B

C

A

M M M M

Supply

Sensor

Supply

Sensor

Boiler

Sensor

Return

Sensor

Return

Sensor

Outdoor

Sensor

iSeries-R

HEC-2

HEC-2

HEC-2

HEC-2

Constant Power (Fixed Speed) Performance Curves

Applications & Performance

TacoInc.,1160CranstonStreet.Cranston,RI02920/(401)942-8000/Fax(401)942-2360

Taco(Canada)Ltd.,8450LawsonRoad,Unit#3,Milton,OntarioL9T0J8/(905)564-9422/Fax(905)564-9436

www.taco-hvac.com

Specifications

•Max.OperatingPressure:125psi

    (862kPa)

 •Min.FluidTemp:40°F(4ºC)

 •Max.FluidTemp:230°F(110ºC)

 •Max.Flow:15gpm

 •Max.ShutoffHead:15feet

 •ElectricalSpecifications:  

 - Voltage:

115-230, 50/60 Hz, single phase

- Operating power range: 9W - 42W

- Max. Amp rating: 0.67 / 0.39

 •HEC-2isprovidedwithacast 

  ironcasingandshouldbeused 

  inclosedloopsystemsonly.

 •Acceptableforusewithwater 

  ormaximumof50%water/glycol

  solution.

Performance Data

•ProgrammablePCboardwith 

  LEDdisplayand3operatingmodes:

CP – Constant Power

   (FixedSpeed)Modeallows 

   for4fixedcirculatorspeeds. 

  SP – Set Point Modeallows

   forafixedsupplytemperature,

   65°F-220°F.

  dE – Delta-T Modeallowsfor

   afixedtemperaturedifferential

  (∆T)rangefrom5°F-50°F.

•CanbewiredtoaTacoZVCZone

  ValveControlorSRSwitching 

  RelayforON/OFFoperation.

 •Sensorkitincludesonelong 

  andoneshortsensorwith 

  twotiewraps.

 •IntegralFlowCheck(IFC®)is 

  includedincarton.Simplypress 

  intodischargeflangeifrequired.

 •Swivel-flangedcasingprovides 

  360°rotationmountingflexibility.

 •LEDdisplaysoperatingmode,flow

  (GPM)andpowerusage(WATTS),

  alternatingevery5seconds.

Description:

The Taco Bumble Bee (model HEC-2) is a multi-function, variable speed, wet

rotor circulator with an ECM, permanent magnet motor. Its high efficiency DC

motor reduces power consumption by up to 85% compared to AC permanent

split capacitor circulators.

FOR INDOOR USE ONLY

Shipping Weight

Model

A B C D E F

Ship Wt.

in. mm in. mm in. mm in. mm in. mm in. mm lbs. Kg

HEC-2 7-1/8 180 5-3/4 145 3-1/4 81 2-5/16 58 6-5/16 161 4-7/16 112 7 3.2

E

D

F

A

B

C

Pump Dimensions & Weights

Electrical Data

Model

Volts Hz Ph Amps RPM

HP

HEC-2 115-230 50/60 1 .67 / .39 1750-3800 1/20

Motor

Type ECM, Permanent Magnet

Speed 1

(Watts)

Speed 2

(Watts)

Speed 3

(Watts)

Speed 4

(Watts)

922 32 42

Materials of Construction:

Casing: .......................... Cast Iron

Integral Flow Check (IFC®):

Body, Plunger ..... Acetal

O-ring Seal ......... EPDM

Spring................... Stainless Steel

Stator Housing: ........... Aluminum

Cartridge: ..................... Stainless Steel

Impeller: ........................ Non-Metallic

Shaft: .............................. Ceramic

Bearings: ........................ Ceramic

O-Ring & Gaskets: ...... EPDM

Mounting Positions

4001998

Submittal Data # 101-152 Eective: 10/15/12

Supersedes: New

Submittal Data Information

Bumble Bee Circulator

CONFORMS TO:

UL STD 778

CERTIFIED TO:

CAN/CSA STD C22.2

NO. 108