TriangleTube SMART Series, SMART 40, SMART 30, SMART 50, SMART 60 Installation & Maintenance Manual

Technical Specifications

Installation & Maintenance Manual

SMART

30 - 40 - 50 - 60 - 80 - 100 - 120

Indirect Fired Water Heater

NOTICE

• When receiving the SMART unit, any claims for damage or shortage in shipment must be filed immediately against the
transportation company by the consignee.

• Customer must register unit within sixty (60) days of installation in order to gain warranty coverage. See Warranty Card for
details.

• Leave all documentation received with appliance with the owner for future reference.

• Installation and service should only be performed by a qualified installer or service technician.

• Installations and service should be performed by a licensed plumber or gas fitter in the Commonwealth of Massachusetts.

WARNING

Before proceeding with installation and operation, read entire manual carefully. Failure to do so

can cause property damage or personal injury.

Revision date : 06/25/19

2010-49 Smart Manual

INTENTIONALLY LEFT BLANK

TABLE OF CONTENTS

PRODUCT AND SAFETY INFORMATION ......................................................................... VII

CHAPTER 1 - PRE-INSTALLATION ...................................................................................... 1

1.1. Codes Compliance .......................................................................................................................... 1

1.2. Codes Restrictions .......................................................................................................................... 1

1.3. Operating Restrictions .................................................................................................................... 1

1.4. Locating Water Heater ....................................................................................................................2

1.5. Recommended Clearances ............................................................................................................2

CHAPTER 2 - INSTALLATION - PIPING ..............................................................................3

2.1. Temperature & Pressure (T&P) Relief Valve .................................................................................3

2.1.1 Standard Installation ............................................................................................................. 3

2.1.2 Commonwealth of Massachusetts Installation ..................................................................3

2.1.3 T&P Relief Valve Discharge Piping .......................................................................................3

2.2. Drain Valve .......................................................................................................................................4

2.2.1 Standard Installation .............................................................................................................4

2.2.2 Commonwealth of Massachusetts Installation ..................................................................4

2.3. Manual Air Vent ...............................................................................................................................4

2.4. Thermal Expansion .........................................................................................................................4

2.5. Water Hammer ................................................................................................................................4

2.6. Vacuum Breaker ..............................................................................................................................4

2.7. General Piping .................................................................................................................................4

2.8. Domestic Piping ..............................................................................................................................4

2.9. Thermostatic Mixing Valve .............................................................................................................5

2.10. Recirculation Piping. .......................................................................................................................5

2.11. Multiple Water Heater Systems .....................................................................................................5

2.12. Boiler Piping.....................................................................................................................................6

CHAPTER 3 - INSTALLATION - WIRING ........................................................................... 15

3.1. Wiring Requirements .................................................................................................................... 15

3.2. Circulators .....................................................................................................................................15

3.3. Zone Valves....................................................................................................................................15

3.4. Snap Set Connection .................................................................................................................... 15

CHAPTER 4 - WATER HEATER START-UP ....................................................................... 21

4.1. Filling the Inner (Domestic Water) Tank ...................................................................................... 21

4.2. Filling the Outer (Boiler Water) Tank ........................................................................................... 21

4.3. Adjusting the Water Heater Thermostat .................................................................................... 22

iii

TABLE OF CONTENTS

CHAPTER 5 - WATER HEATER MAINTENANCE ...............................................................23

5.1. Maintenance Schedule ................................................................................................................ 23

5.1.1 Annual service by qualified service technician should include the following: ................23

5.1.2 Homeowner monthly maintenance to include: .................................................................23

5.2. Filling Water Heater ...................................................................................................................... 23

5.3. Draining Water Heater ................................................................................................................. 23

5.3.1 Draining Inner (Domestic Water) Tank. .............................................................................24

5.3.2 Draining Outer (Boiler Water) Tank ....................................................................................24

CHAPTER 6 - REPLACEMENT PARTS ..............................................................................25

CHAPTER 7 - WATER HEATER SPECIFICATIONS AND PERFORMANCES ....................26

iv

INDEX OF ILLUSTRATIONS AND TABLES

Fig. 1 - SMART Clearances - View from the Top ......................................................................................2

Fig. 2 - Standard Installation - Domestic Piping - SMART Series ...........................................................7

Fig. 3 - Standard Installation - Domestic Piping with Recirculation - SMART Series ............................7

Fig. 4 - Optional Installation - Domestic Piping with Recirculation - SMART Series..............................8

Fig. 5 - Drain Tube Assembly - Commonwealth of Massachussets........................................................9

Fig. 6 - Commonwealth of Massachussets - Domestic Piping SMART Series ......................................9

Fig. 7 - SMART System Piping with 3-Port Zone Valve (Domestic Priority) .........................................10

Fig. 8 - SMART System Piping with 2-Port Zone Valves (Domestic Priority) .......................................10

Fig. 9 - SMART System Piping with Zone Valves (Non Domestic Priority) ...........................................11

Fig. 10 - SMART System Piping with Zone Circulators ...........................................................................11

Fig. 11 - Multiple SMART Series Water Heater System Domestic Piping - Parallel .............................. 12

Fig. 12 - SMART System Piping with Zone Circulators ..........................................................................12

Fig. 13 - Multiple SMART Series Water Heater System Boiler Piping Reverse Return Balanced Flow ..... 13

Fig. 14 - Multiple SMART Series Water Heater System Boiler Piping - Manifold ................................. 13

Fig. 15 - Snap Set Wiring...........................................................................................................................15

Fig. 16 - Typical 4-wire Zone Valve Zoning, with Domestic Priority....................................................... 16

Fig. 17 - Typical 3-wire Zone Valve Zoning, with Domestic Priority ....................................................... 16

Fig. 18 - Typical 4-wire Zone Valve Zoning, without Domestic Priority ................................................. 17

Fig. 19 - Typical 3-wire Zone Valve Zoning, without Domestic Priority ................................................. 17

Fig. 20 - Typical Circulator Zoning with Domestic Priority .................................................................... 18

Fig. 21 - Typical Circulator Zoning without Domestic Priority ............................................................... 18

Fig. 22 - Priority Zone Circulator Wiring .................................................................................................. 19

Fig. 23 - SMART Series Temperature Knob .......................................................................................... 22

Fig. 24 - SMART Assembly ...................................................................................................................... 25

Fig. 25 - SMART Cover Plate Assembly ................................................................................................. 25

Fig. 26 - SMART Dimensions - Side View ............................................................................................... 26

Fig. 27 - SMART Dimensions - Top View .................................................................................................27

Table 1 - Piping dimensions ........................................................................................................................5

Table 2 - SMART Water Heater Specifications .......................................................................................27

Table 3 - SMART Water Heater Performance at 200°F boiler water supply (140°F DHW outlet)..... 28

Table 4 - SMART Water Heater Performance at 200°F boiler water supply (115°F DHW outlet) ..... 28

v

INTENTIONALLY LEFT BLANK

PRODUCT AND SAFETY INFORMATION

IMPORTANT SAFETY INFORMATION FOR
THE HOMEOWNER AND THE INSTALLER

DANGER

SAFETY

This manual contains important information with respect to the
installation, starting up and maintenance of the appliance.

This manual must be provided to the Homeowner, who will
keep it in a safe place for future reference.

Triangle Tube accepts no liability for any damage,
injury, or loss of life resulting from incorrect
installation, alteration of any factory supplied
parts, or the use of parts or ttings not specied by
Triangle Tube. If there is a conict or doubt about the
proper installation of the unit or any factory supplied

replacement parts please contact Triangle Tube
Technical Support.

DEFINITIONS

The following terms are used throughout this manual
to bring attention to the presence of potential hazards
or to important information concerning the product.

DANGER

Indicates the presence of a hazardous situa­tion which, if ignored, will result in substantial

property damage, serious injury, or death.

WARNING

Indicates a potentially hazardous situation
which, if ignored, can result in substantial

property damage, serious injury, or death.

CAUTION

Indicates a potentially hazardous situation
which, if ignored, can result in minor property

damage, or injury.

Hot Water Can Scald!

• Water temperatures over 125ºF can cause severe
burns instantly or death from scalding.

• Children, disabled and elderly are at highest risk of
being scalded.

• Never leave them unattended in or near shower,
bathtub or sink.

• Never allow small children to use a hot water faucet
or draw their own bath.

• If anyone using hot water in the building fits the
above description or if local codes or state laws
require specific water temperatures at hot water
faucet, it is recommended:

- To install a thermostatic mixing valve at this
appliance or at each water faucet.

or

- To set the thermostat knob for the lowest
temperature which satisfies your hot water needs.

• Water drained from the system drain valves may be
extremely hot. To avoid injury:

– Make sure all connections are tight.
– Direct water flow away from any person.

WARNING

NOTICE

Indicates special instructions on installation,
operation or maintenance, which are import­ant to the equipment but not related to person-

al injury hazards.

BEST PRACTICE

Indicates recommendations made by Triangle
Tube for the installers, which will help to ensure
optimum operation and longevity of the equip-

ment.

Bacteria can develop in the domestic water
system if certain minimum water tempera­tures are not maintained. Failure to maintain
at least 140°F [60°C] domestic hot water tem­perature (using the Antilegionella function
of your boiler, if any) can result in bacteria
development, which can result in serious in-

jury, or death.

vii

SAFETY

PRODUCT AND SAFETY INFORMATION

CAUTION

• It is prohibited to carry out any modifications to
the appliance without prior written consent from
Triangle Tube.

• Faulty parts must only be replaced by genuine
Triangle Tube factory parts.

• To prevent damage to the inner tank, the Installer
must:

– Always fill inner tank prior to outer tank and always

drain outer tank prior to inner tank.

– Relieve primary system pressure below 15 psig

prior to draining inner tank.

• Failure to comply with these instructions can result
in minor property damage, or injury.

• In case of any anomaly, please call your qualified
service technician.

• Make sure to reference the unit’s model number and
serial number from the rating label when inquiring
about service or troubleshooting.

• Triangle Tube reserves the right to change the
technical characteristics, components and features of
its products without prior notice. Check for an updated
version of this manual at www.triangletube.com.

NOTICE

CAUTION

• Protection must be taken against excessive
temperature and pressure! Installation of a
Temperature & Pressure (T&P) relief valve is required.

• Failure to comply with these instructions can result
in minor property damage, or injury.

viii

CHAPTER 1 - PR E - I N S TALL AT I O N

1.1. Codes Compliance

Water heater installation must conform with the in­structions in this manual and where applicable:

• local, state, provincial, and national codes, laws,
regulations and ordinances.

• in Canada - CAN / CGA B149.1 or B149.2 Instal­lation Code.

SMART water heaters are exempt from ASME Section
VIII, Division 1 Code construction per Interpretation VIII­86-136. Check with local codes for applicability.

NOTICE

SMART Series water heaters will absorb less
than 200,000 BTU/hr when domestic wa­ter outlet temperature is 210ºF and boil­er water supply temperature is 240ºF. List­ed outputs are based on ASME Section VIII

Interpretation VIII-1-86-136.

Where recommendations in this manual dier from lo­cal, or national codes, the local or national codes take
precedence.

1.2. Codes Restrictions

Single wall heat exchanger in the SMART water heater
complies with National Standard Plumbing Code, pro­vided that:

• Boiler water (including additives) is practically
non-toxic, having toxicity rating or class of 1, as
listed in Clinical Toxicology of Commercial
Products, and

• Boiler water pressure is limited to maximum
30 psig by approved relief valve.

Other heat exchanger designs may be permitted where
approved by the Administrative Authority.

1.3. Operating Restrictions

• Maximum domestic hot water temperature is 194ºF
for commercial applications and 140ºF for residen­tial applications.

• Maximum boiler water temperature is 210ºF.

• Maximum working pressure for inner (domestic
water) tank is 150 psig.

• Maximum working pressure for the outer (boiler
water) tank is 45 psig.

• Water quality limitations (based on E.P.A National
Secondary Drinking Water Regulations):

– Chloride, less than 150 ppm or mg/l
– pH value min. 6, max. 8
– Total hardness 3 - 7 grains/gallon or 50-120

ppm or mg/l.

– Total Dissolved Solids (TDS), less than 120 ppm

or mg/l.
– Iron less than 0.3 ppm or mg/l.
– Aluminum, less than 0.2 ppm or mg/l.
– Copper, less than 1 ppm or mg/l.
– Manganese, less than 0.05 ppm or mg/l.
– Zinc, less than 5 ppm or mg/l.

BEST PRACTICE

In hard water areas (more than 7 grains of
hardness) soften the cold domestic supply wa-

ter to the appliance to prevent scaling.

CHAPTER 1

Single wall heat exchangers are permitted under the
Uniform Plumbing code - Paragraph L3.2. and L3.3 if
they satisfy all of the following requirements.

1. The heat transfer medium is potable water or con­tains only substances which are recognized as safe
by the U.S. Food and Drug Administration.

2. The pressure of the heat transfer medium is main­tained less than the normal minimum operating
pressure of the potable water system

Exception: Steam complying with section #1 above.

3. The equipment is permanently labeled to indicate
that only additives recognized as safe by the FDA
shall be used in the heat transfer medium.

NOTICE

• Any water conditioning system must be in­stalled and maintained in accordance with

manufacturer’s specifications.

• Do not install the water heater on any appli­cation if the boiler piping contains non-ox­ygen barrier tubing or if the boiler piping is
considered an “open system”. Exposing the
tank of the water heater to oxygen contam­ination will lead to premature tank failure

and denial of the warranty.

1

CHAPTER 1 - PRE-INSTALLATION

CHAPTER 1

1.4. Locating Water Heater

• This water heater is not intended for outdoor instal­lations.

• Keep distance between boiler and water heater to
a minimum to:

– Reduce piping heat loss
– Provide minimal friction loss

• Locate water heater so that any leakage from the
tank or water connections will not cause damage
to the area adjoining the water heater or to lower
oors in the structure.

– When such a location is unavoidable, a suitable

drain pan with adequate drainage, should be
placed under the water heater.

• The SMART Series Water Heaters are designed for
vertical installation only.

1.5. Recommended Clearances

Water heater should be installed to allow adequate
clearance for servicing.

Zero clearance is permissible to any side of the SMART
Series water heater that has no connection, but infor­mation labels may be hidden.

Also take into account the clearance required for any
accessory that needs to be installed on the heating
and/or domestic circuits.

BEST PRACTICE

• Recommended top or vertical clearance is
12” minimum.

• Refer to boiler manual for boiler clearances.

Wall

12” Minimum

Water

Heater

Fig. 1 - SMART Clearances - View from the Top

2

CHAPTER 2 - INSTALLATION - PIPING

2.1. Temperature & Pressure (T&P) Relief
Valve

CAUTION

To reduce risk of excessive pressures and
temperatures in the water heater, install tem­perature and pressure protective equipment
required by local codes, but no less than a com­bination temperature and pressure relief valve
certified by a nationally recognized testing lab­oratory that maintains periodic inspection of
production of listed equipment or materials, as
meeting the requirements for Relief Valves and
Automatic Gas Shutoff Devices for Hot Water
Supply Systems, ANSI Z21.22. This valve must
be marked with a maximum working pressure

of the water heater.

• Every SMART water heater must be protected with

a T&P relief valve.

• Determine T&P relief valve size by the following

specications, unless they conict with local codes:

– SMART 30/40/50: 3/4”NPT with an AGA Rating

of 100,000 BTU/hr and a maximum pressure rat­ing of 150 psig. (Watts 100XL-8 or equivalent).

– SMART 60/80/100/120: 3/4”NPT with an AGA

Rating of 200,000 BTU/hr and a maximum pres­sure rating of 150 psig. (Watts 40XL-8 or equiv­alent).

NOTICE

For proper operation of the T&P and to prevent
the T&P from activating due to boiler water
temperature, use a T&P relief valve with extend­ed element. We recommended an 8” minimum
length to ensure element senses domestic water.

2.1.1 Standard Installation

• Install T&P relief valve in the Auxiliary connection
located behind the air vent on the top of the water
heater (Refer to Fig. 2 on page 7).

or

• Install the T&P relief valve in the run (straight through
leg) of a tee located at the domestic hot water outlet
when using the Auxiliary connection for a recircula­tion return (Refer to Fig. 3 on page 7).

CHAPTER 2

2.1.2 Commonwealth of Massachusetts Installation

Follow this procedure for jurisdictions requiring a vacu­um breaker to be installed on the domestic cold water
inlet.

• Install the T&P valve in the run (straight through leg)
of a tee located at the domestic hot water outlet.
Use a long element T&P relief valve (Refer to Fig. 6

on page 9).

2.1.3 T&P Relief Valve Discharge Piping

• T&P relief valve discharge piping must be:

– Made of material serviceable for temperatures

of 250ºF or greater.

– Directed so that hot water ows away from all

persons.
– Directed to a suitable place for disposal.
– Installed so as to allow complete draining of the

T&P relief valve and discharge line.

• T&P relief valve discharge piping must not be:

– Excessively long. Using more than 2 elbows or

15 feet of piping can reduce discharge capacity.

– Directly connected to a drain. Terminate discharge

piping within 6” from drain. Refer to local codes.
– Plugged, reduced or restricted.
– Subject to freezing.

WARNING

Do not install any valve between T&P relief
valve and tank connection or on T&P relief valve
discharge piping. Do not plug T&P relief valve
or discharge piping. Improper placement and
piping of T&P relief valve can cause substantial

property damage, serious injury, or death.

3

CHAPTER 2 - INSTALLATION - PIPING

CHAPTER 2

2.2. Drain Valve

Drain valve and ttings are supplied by others.

2.2.1 Standard Installation

• Install a tee connection at the domestic cold water
inlet (Refer to Fig 3 & Fig. 3 on page 7, and Fig.

4 on page 8).

• Pipe the drain piping with drain valve from the tee
connection to:

– a suitable place for disposal

or

– terminate within 12” of the oor

2.2.2 Commonwealth of Massachusetts Installation

• Thread a 3/4” close nipple onto the Auxiliary con-

nection and insert an open end dip tube into the
Auxiliary connection on top of water heater, as

shown in Fig. 5 on page 9.

• Install a 3/4” NPT elbow to the Auxiliary connection,

refer to Fig. 6 on page 9.

• Pipe the drain piping with drain valve from the el-

bow connection to :

– a suitable place for disposal

or

– terminate within 12” of the oor

2.3. Manual Air Vent

1. A manual air vent is factory installed.

2. Open manual air vent. Once the tank is full and air
has stopped escaping, close the manual air vent.

2.4. Thermal Expansion

If a backow preventer, check valve or pressure reduc­ing valve is piped on cold water supply piping of water
heater, install an expansion tank on cold water supply
line to prevent normal thermal expansion from repeat­edly forcing open T&P relief valve.

2.5. Water Hammer

Dishwashers, clothes washers and fast-closing positive
shut-o valves incorporated in the system all contrib­ute to creating water shock. Install a water hammer ar­rester to prevent damage to pipes and appliances. See
device manufacturer’s instructions for application and
installation.

NOTICE

Water hammering within the domestic piping
system can cause premature failure of the inner
tank of the water heater. This type of failure is

NOT covered under warranty.

2.6. Vacuum Breaker

Installing a vacuum breaker (Watts N36-M1 or equiv­alent) on the domestic cold water inlet will prevent
damage to the inner tank if a negative pressure is de­veloped in the domestic supply line. See manufactur­er’s instructions for application and installation of the
vacuum breaker.

2.7. General Piping

• For domestic water piping diagram, refer to Fig. 2
on page 7 thru Fig. 6 on page 9.

• For Boiler water piping, refer to Fig. 7 on page 10
thru Fig. 14 on page 13 Fig. 10 on page 11.

• For Multiple water heater domestic and boiler pip­ing, refer to Fig. 11 on page 12 thru Fig. 14 on
page 13.

• See Table 1 on page 5 for domestic and boiler
piping connection sizes .

• All plumbing must meet or exceed all local, state
and national plumbing codes.

• Use pipe dope or tape suitable for potable water
systems.

• Use isolation valves to isolate system components.

CAUTION

T&P relief valve is not intended for constant duty,
such as relief of pressure due to repeated nor­mal system expansion. Correct this condition by
installing a properly sized expansion tank in do-

mestic water system.

Refer to expansion tank manufacturer’s instal-

lation instructions for proper sizing.

4

2.8. Domestic Piping

• Union on domestic hot water outlet should be piped
at a higher elevation than domestic water drain valve.
This will make draining the water heater easier.

• Install unions for easy removal of water heater. It
is recommended to use dielectric unions or cou­plings to protect hot and cold water ttings from
corrosion when connecting dissimilar materials
such as copper and galvanized iron pipe.

CHAPTER 2 - INSTALLATION - PIPING

• If copper pipe is used for domestic water connections,
rst solder pipe to a threaded adapter and then screw
adapter into cold water inlet on top of water heater.
Inlet connection contains an internal plastic dip tube
which can be damaged by heat from soldering.

NOTICE

Do not apply heat to the cold water inlet when
making sweat connections to water heater.
Sweat tubing to adapter before fitting adapter
to cold water inlet of heater. It is imperative that
no heat be applied to the cold water inlet, as it

contains a non metallic dip tube.

• When the water supply pressure is higher than 70
psig, it is recommended to install a pressure reduc­ing valve on cold water supply line to prevent wa­ter loss through T&P relief valve.

• If the water heater will replace a tankless coil in the
boiler, disconnect the piping to coil and allow the
water to drain from coil. Do not plug the tankless coil.

DANGER

Plugging tankless coil inlet and outlet will re­sult in substantial property damage, serious

injury, or death.

2.9. Thermostatic Mixing Valve

• It is recommended to install an optional mixing
valve on the domestic hot water outlet.

• Mixing valve must comply with ASSE 1017

2.10. Recirculation Piping.

• T&P relief valve must be installed in run (straight
through leg) of tee located at domestic hot water
outlet of water heater.

• It is recommended that the recirculation dip tube
be installed in auxiliary connection using a close
nipple assembly as shown in Fig. 3 on page 7.
See Table 1 below for diameter and length of dip
tube.

• A stainless steel or bronze circulator is required on
potable water systems.

• Install automatic mixing valve either at the hot wa­ter outlet of water heater or each hot water faucet

2.11. Multiple Water Heater Systems

• Parallel Pipe Recirculation Systems - Manifold recircu­lation return to all water heaters.

• Series Piped Systems - Piped return to the leading
(cold water inlet) water heater.

• Install an automatic mixing valve either at the hot wa­ter outlet of water heater or each hot water faucet.

DANGER

Failure to install automatic mixing valve
where recommended will result in serious in-

jury, or death.

CHAPTER 2

Water

Heater

Model

SMART 30

SMART 40

SMART 50

SMART 60

SMART 80

SMART 100

SMART 120

Table 1 - Piping dimensions

Recommend-

ed Minimum

Boiler Piping

Domestic

Water

Inlet/Outlet

(NPT)

Connections (inches)

Boiler Water

Supply/

Return

(NPSC)

Auxiliary Connection

(NPSC)

Recirculation Dip

Tube

Length

(Inches)

Diam-

eter

(Inches)

Draining Dip Tube

Length

(Inches)

Diameter

(Inches)

3/4 1 3/4 34 3/4 34 3/4 1

3/4 1 3/4 43 3/4 43 3/4 1

3/4 1 1/4 3/4 25 3/4 52 3/4 1

3/4 1 1/4 3/4 34 3/4 62 3/4 1 1/4

1 1/2 1 1/2 1 1/2 25 1 1/2 48 1 1/2 1 1/4

1 1/2 1 1/2 1 1/2 32 1 1/2 61 1 1/2 1 1/2

1 1/2 2 1 1/2 32 1 1/2 61 1 1/2 1 1/2

Diameter

(Inches)

5

CHAPTER 2 - INSTALLATION - PIPING

2.12. Boiler Piping

CHAPTER 2

• If plastic pipe is used for boiler water piping, it must
have a maximum oxygen diusion rate of 0.1 mg/
liter-day for boiler and water heater protection.

NOTICE

The SMART IDWH must be installed on a closed
type hydronic system. Failure to provide such
a system will result in premature failure of the

tank and annulment of warranty.

• Boiler water (including additives) must be practical­ly non-toxic, having toxicity rating or class of 1, as
listed in Clinical Toxicology of Commercial Prod-
ucts.

CAUTION

Antifreeze can only be used if the boiler water

pressure relief valve is set to 30 psig or below.

• If antifreeze is used in the boiler system, local codes
may require a backow preventer on cold water
supply line. Use antifreeze specically intended for
hydronic heating systems. Inhibited propylene gly­col is recommended at a maximum 50/50 mixture.

DANGER

Do not use automotive, ethylene glycol or
petroleum-based antifreeze. Do not use any
undiluted antifreeze. This can cause substan­tial property damage, serious injury, or death.

6

CHAPTER 2 - INSTALLATION - PIPING

5

12" min.

Heat Trap

Loop

(Optional)

1

7

6

8

12" min.

Heat Trap

Loop

(Optional)

10

H

M

1

5

C

Fig. 2 - Standard Installation - Domestic Piping - SMART Series

4

1

Cold Water

Inlet

CHAPTER 2

Recirculating

Loop

Fig. 3 - Standard Installation - Domestic Piping with Recirculation - SMART Series

2

1

12" min.

Heat Trap

Loop

(Optional)

5

9

1. Shut-o valve

2. Recirculation Circulator

3. Flow Check Valve

4. T&P relief valve

5. Unions

6. Backow preventer or pressure reducing valve(*)

12" min.

Heat Trap

Loop

(Optional)

3

1

4

5

7

1

6

8

Cold Water

Inlet

7. Drain valve

8. Thermal expansion tank (potable)

9. Recirculation dip tube

10. Thermostatic mixing valve (*)

(*) Optional devices may be required by local codes.

7

CHAPTER 2

CHAPTER 2 - INSTALLATION - PIPING

Recirculating

Loop

2

1

12" min.

Heat Trap

Loop

(Optional)

3

5

12" min.

Heat Trap

Loop

(Optional)

1

5

4

7

1

6

8

Cold Water

Inlet

1. Shut-o valve

2. Recirculation Circulator

3. Flow Check Valve

4. T&P relief valve

5. Unions

Fig. 4 - Optional Installation - Domestic Piping with Recirculation - SMART Series

6. Backow preventer or pressure reducing valve(*)

7. Drain valve

8. Thermal expansion tank (potable)

(*) Optional devices may be required by local codes

8

CHAPTER 2 - INSTALLATION - PIPING

Fig. 5 - Drain Tube Assembly - Commonwealth of Massachussets

CHAPTER 2

12" min.

Heat Trap

Loop

(Optional)

10

H

M

1

Fig. 6 - Commonwealth of Massachussets - Domestic Piping SMART Series

5

C

4

11

1. Shut-o valves

4. T&P relief valve

5. Unions

6. Backow preventer or pressure reducing valve (*)

7. Drain valve

8. Thermal expansion tank (potable)

12" min.

Heat Trap

Loop

(Optional)

Cold Water

1

5

9

7

6

8

Inlet

9. Vacuum breaker

10. Mixing valve (*)

11. Dip tube - Draining per Chart 1
(*) Optional devices may be required by local codes.

9

CHAPTER 2 - INSTALLATION - PIPING

CHAPTER 2

1

2

6

3

Fig. 7 - SMART System Piping with 3-Port Zone Valve (Domestic Priority)

3- Port

Priority

Valve

Cold water

5

1

1

inlet

4

2-Port

Priority Valve

(normally open)

1. Shut-o valves

2. Circulator

3. Expansion tank

4. Drain valve

5. Feed valve

6. Air separator

2-Port

Priority Valve

6

3

Fig. 8 - SMART System Piping with 2-Port Zone Valves (Domestic Priority)

(normally close)

2

1

5

1

Cold water

inlet

4

10

CHAPTER 2 - INSTALLATION - PIPING

CHAPTER 2

Fig. 9 - SMART System Piping with Zone Valves (Non Domestic Priority)

1. Shut-o valves

2. Circulator

3. Flow check valve

4. Expansion tank

5. Drain valve

Fig. 10 - SMART System Piping with Zone Circulators

6. Feed valve

7. Air separator

11

CHAPTER 2

CHAPTER 2 - INSTALLATION - PIPING

• Recommended for most applications.

• Any one water heater tank thermo­stat may be utilized to control system
temperature.

• Install automatic mixing valve at ei­ther the hot water outlet of the water
heater system or at each hot water
xture.

• Each tank should be piped with a
drain as shown in Fig. 2 on page 7

Fig. 11 - Multiple SMART Series Water Heater System Domestic Piping - Parallel

• Recommended for applications in
which there is a large water consump­tion in short period of time.

• A maximum of 3 water heaters may
be piped in series.

• Utilize the lead (hot water outlet)
SMART tank thermostat to control
system temperature.

• Install automatic mixing valve at ei­ther the hot water outlet of the water
heater system or at each hot water
xture.

• Each tank should be piped with a
drain as shown in Fig. 2 on page 7.

12

Fig. 12 - SMART System Piping with Zone Circulators

CHAPTER 2 - INSTALLATION - PIPING

Fig. 13 - Multiple SMART Series Water Heater System Boiler Piping Reverse Return Balanced Flow

CHAPTER 2

1. Shut-o valves

2. Circulator

3. Flow check valve

4. Expansion tank

5. Drain valve

Fig. 14 - Multiple SMART Series Water Heater System Boiler Piping - Manifold

6. Feed valve

7. Air separator

13

INTENTIONALLY LEFT BLANK

CHAPTER 3 - INSTALLATION - WIRING

3.1. Wiring Requirements

WARNING

Electrical shock hazard can cause substantial
property damage, serious injury, or death.
Disconnect power before installing and/or

servicing.

1. All wiring must be a minimum of 18 gauge and in­stalled in accordance with:

• U.S.A. - National Electrical Code and any other

national, state or local code requirements hav­ing jurisdiction.

• Canada - C.S.A. C22.1 Canadian Electrical Code

Part 1 and any other national, provincial and lo­cal code requirements having jurisdiction.

2. If original wire supplied with appliance must be re­placed, Type 90ºC or its equivalent must be used.

3. Refer to control component instructions packed
with boiler for application information.

4. An optional service switch may be installed in water
heater electrical circuit. This switch would only shut
o the water heater, not the home heating system.
Do not shut o water heater if there is a chance of
freezing.

5. All electrical contacts shown do not have power
applied - o the shelf condition. See pages 15 to 19.

3.3. Zone Valves

Transformer must be sized for maximum load of all
zone valves.

3.4. Snap Set Connection

For easy wiring between water heater thermostat and
boiler controls see wiring diagrams in following pages
(refer to Fig. 16 on page 16 thru Fig. 22 on page 19).

Make sure snap set is rmly snapped together after wir­ing.

CHAPTER 3

3.2. Circulators

Priority relay must be sized for total amp draw of all cir­culators.

Fig. 15 - Snap Set Wiring

15

CHAPTER 3 - INSTALLATION - WIRING

CHAPTER 3

Water

Heater

Zone

Zone 1

Transformer

(Power)

Water Heater

Thermostat

Snap-Set

1
2C

Room

Thermostat

H

V.A.C.

V.A.C.

Priority

Relay

120

24

N

High Voltage

Zone Valve

Zone Valve

Water

Heater

Zone

Zone 1

Transformer

(Power)

Water Heater

Thermostat

Snap-Set

1
2C

Room

Thermostat

H

Priority

Relay

120

V.A.C.

24

V.A.C.

N

High Voltage

Zone Valve

Zone Valve

Additional zones

Additional zones may

be added as shown above

Additional zones

Additional zones may

be added as shown above

*Isolation Relay

High Voltage
Low Voltage
Boiler Low Voltage

Boiler

Thermostat

Terminals

* Use isolation relay on
3-wire zone valves with
non-isolated end switches.
Transformer and boiler
control can burn out if

Boiler

Thermostat

Terminals

isolation relay is not used

Fig. 16 - Typical 4-wire Zone Valve Zoning, with Domestic Priority Fig. 17 - Typical 3-wire Zone Valve Zoning, with Domestic Priority

16

CHAPTER 3 - INSTALLATION - WIRING

Water

Heater

Zone

Zone 1

Zone 2

Transformer

(Power)

Water Heater

Thermostat

Snap-Set

1
2C

Room

Thermostat

Room

Thermostat

120

V.A.C.

N

High Voltage

H

Transformer

120

V.A.C.

N

High Voltage

H

(Power)

24

V.A.C.

24

V.A.C.

Zone Valve

Water

Heater

Zone

Water Heater

Thermostat

Snap-Set

1
2C

Room

Thermostat

CHAPTER 3

Zone Valve

Zone Valve

Zone 1

Zone Valve

Room

Zone Valve

Zone Valve

Thermostat

Zone 2

Additional zones

High Voltage

Low Voltage
Boiler Low Voltage

Additional zones may

be added as shown above

Boiler

Thermostat

Terminals

Fig. 18 - Typical 4-wire Zone Valve Zoning, without Domestic

Priority

Additional zones

Additional zones may

be added as shown above

*Isolation Relay

* Use isolation relay on
3-wire zone valves with
non-isolated end switches.
Transformer and boiler
control can burn out if

Boiler

Thermostat

Terminals

isolation relay is not used

Fig. 19 - Typical 3-wire Zone Valve Zoning, without Domestic

Priority

17

CHAPTER 3 - INSTALLATION - WIRING

CHAPTER 3

120

T

2

T

T

2

C

T

1

T

1

1

2

T

Thermostat

zone 1

3

4

Thermostat

zone 2

3

4

Circulator

Zone 2

6

5

6

5

T

2

T

2

C

T

T

1

T

1

1

2

T

Thermostat

zone 1

3

4

Circulator

Zone 1

Thermostat

zone 2

3

4

Circulator

Zone 2

120

H

6

5

6

5

Honeywell

R845A

Relay

VAC

H

N

Water Heater

Thermostat

Snap-Set

VAC

Honeywell

R845A

Relay

N

Circulator

Zone 1

Water Heater

Thermostat

Snap-Set

18

3

Priority Relay

4

1

3

4

1

2

5

Water

Heater

Circulator

6

Thermostat

Boiler

Terminals

High Voltage
Low Voltage

2

Water

Heater

Circulator

6

5

Boiler

Thermostat

Terminals

Fig. 20 - Typical Circulator Zoning with Domestic Priority Fig. 21 - Typical Circulator Zoning without Domestic Priority

CHAPTER 3 - INSTALLATION - WIRING

Note: Maximum of 4 total
circulator zone when wiring

1 zone for priority

Low Voltage
High Voltage

Priority Zone

Circulator

CIRC

ON

ZONING CIRCULATOR

120

T

2

Thermostat

zone 1

T

4

1

3

6

5

Honeywell

R845A

Circulator

Relay

VAC

H

N

CHAPTER 3

Circulator

Zone 1

Thermostat

zone 2

T

T

3

4

1

2

6

5

Circulator

Zone 2

Water Heater

Thermostat Snap Set

2

C

1

T T

ON

PRIORITY

PR1

LIVE

NEUT

Fig. 22 - Priority Zone Circulator Wiring

T

2

Thermostat

zone 3

T

4

1

3

6

5

Circulator

Zone 3

To Boiler 24 VAC

Thermostat Leads

19

INTENTIONALLY LEFT BLANK

CHAPTER 4 - WATER HEATER START-UP

4.1. Filling the Inner (Domestic Water) Tank

CAUTION

• Never use water heater unless inner and
outer tanks are completely filled with water.

• Inner tank must be completely filled and

pressurized before pressurizing outer tank.

1. Close domestic water drain valve.

2. Open domestic water isolation valves for water
heater.

3. Vent air from inner (domestic water) tank by open­ing nearest hot water faucet. Fill domestic water
tank completely by allowing water to run until
there is a constant ow of water.

4. Close hot water faucet.

4.2. Filling the Outer (Boiler Water) Tank

CAUTION

• Never use water heater unless inner and
outer tanks are completely filled with water.

• Inner tank must be completely filled and

pressurized before pressurizing outer tank.

1. Close boiler water drain valve at boiler water outlet
of water heater.

2. Open water heater’s boiler water isolation valves.

3. Allow air to escape from outer (boiler water) tank by
opening manual air vent, located on top of water
heater.

4. Follow instructions furnished with boiler to ll with
water.

5. When tank is full, and air stops escaping, close the
manual air vent.

6. If antifreeze is used in boiler water, check concen­tration. Boiler water (including additives) must be
practically non-toxic, having toxicity rating or class
of 1, as listed in Clinical Toxicology of Commercial
Products.

DANGER

HOT WATER CAN SCALD!

Water temperature over 125ºF can cause se-

vere burns instantly or death from scalds.

• Feel water before bathing or showering.

• Consumer Product Safety Commission
and some states recommend tempera­tures settings of 130ºF or less. Setting ther­mostat higher than 130ºF will increase risk
of scald injury and cause severe personal
injury or death.

• Water heated to a temperature suitable
for clothes washing, dish washing and
other sanitizing needs will scald and cause
permanent injury.

• Children and elderly, infirm, or physically
handicapped persons are more likely to
be injured by hot water. Never leave them
unattended in or near a bathtub. If anyone
using hot water in the building fits this
description, or if state laws or local codes
require certain water temperatures at hot
water faucets, take special precautions.

– Install an automatic mixing valve at

water heater or at each hot water fau­cet, bath and shower outlet. Selection
and installation must comply with
valve manufacturer’s recommenda­tion and instructions.

– Use the lowest practical temperature

setting.

– Check water temperature after any ad-

justment. You must follow “Adjusting the
Water Heater Thermostat” procedures.

CHAPTER 4

WARNING

Do not use automotive, ethylene glycol or pe­troleum-based antifreeze. Do not use any un­diluted antifreeze. This can cause substantial

property damage, serious injury, or death.

WARNING

At no time should boiler limit control be set
above 210ºF. This can cause substantial prop­erty damage, serious injury, or death if ig-

nored.

21

CHAPTER 4 - WATER HEATER START-UP

CHAPTER 4

NOTICE

• Household water usage patterns will af­fect water temperature at any faucet or
shower. Occasionally check temperature at
each point of use, then adjust thermostat
accordingly. Always recheck temperature

after adjusting thermostat.

• When hot water is used in repeated small
quantities, a “stacking” effect can develop
in the water heater. The upper layer of wa­ter in tank can be hotter than lower layer,
resulting in very hot water coming out at

the faucet.

• It is therefore recommended to either lower
the thermostat setting or install automatic
mixing valves as indicated in these instruc­tions in order to reduce water temperature
levels. Consult your installer or service tech-

nician.

4.3. Adjusting the Water Heater Thermostat

Water heater thermostat is factory set to its lowest
temperature. This may or may not be suitable for your
needs.

• Turn thermostat knob clockwise to in-
crease water temperature.

• Turn thermostat knob counter-clockwise
to decrease water temperature.

WARNING

Bacteria can develop in the domestic water
system if certain minimum water tempera­tures are not maintained. Failure to maintain
at least 140°F [60°C] domestic hot water tem­perature (using the Antilegionella function
of your boiler, if any) can result in bacteria
development, which can result in serious in-

jury, or death.

• Check water temperature at a hot water faucet im­mediately after rst heating cycle. Further tempera­ture adjustment may be necessary as water heating
system is used. Recheck water temperature at fau­cet after adjustment.

• When adjusting thermostat, be sure boiler limit
control is set a minimum of 20ºF higher.

22

Temperature

up

Temperature
down

Fig. 23 - SMART Series Temperature Knob

CHAPTER 5 - WATER HEATER MAINTENANCE

5.1. Maintenance Schedule

5.1.1 Annual service by qualified service tech­nician should include the following:

¨ Any procedure required by local codes.
¨ Check air vent operation.
¨ Verify system pressure. Air venting procedure may

require adding water to bring system up to pres­sure, typically 12 psig.

¨ Manually operate T&P relief valve at least once a

year. This will release some hot water.

WARNING

Before operating T&P relief valve, make sure
no one is in front of or around T&P relief valve
discharge piping. Hot discharge water can
cause substantial property damage or seri-

ous injury.

¨ Move operating lever to open position for a few

seconds and then move it back, allowing it to snap
closed. After T&P relief valve is operated, if it contin­ues to release water, close cold water inlet to water
heater immediately. Follow draining instructions, to
relieve pressure from the tank and replace T&P relief
valve. If T&P relief valve weeps periodically, it may
be due to thermal expansion see “Thermal Expan-
sion” on page 4. Do not plug T&P relief valve or
discharge piping.

5.1.2 Homeowner monthly maintenance to in­clude:

¨ Check for air.

• Manual air vent-open and close briey to re­lease any air.

¨ Check for leaks.

• Visually check valves, pipes and ttings for leaks.
Call qualied service technician to repair any
leaks.

5.2. Filling Water Heater

See “Filling the Inner (Domestic Water) Tank” on page
21 and “Filling the Outer (Boiler Water) Tank” on page

21.

5.3. Draining Water Heater

Drain water heater if it will be shut o and exposed to
freezing temperatures. Freezing water will expand and
damage water heater.

• If boiler water contains sucient antifreeze, then
only the domestic water needs to be drained.

CAUTION

CHAPTER 5

Close boiler water isolation valves and re­lieve system pressure to below 15 psig in out­er tank before draining inner tank to prevent

damage to inner tank.

DANGER

Plugging T&P relief valve or discharge piping
can cause excessive pressure in water heater,
resulting in substantial property damage, se-

rious injury, or death.

¨ Follow instructions on circulator to oil it, if required.
¨ Check mixing valve, valves, pipes and ttings for

leaks.

¨ Check function of eld-installed controls and valves.

See component manufacturer’s instructions.

¨ Review homeowner’s maintenance responsibilities

and their frequencies, including any not listed in
the following section.

• If boiler water does not contain sucient antifreeze,
then the boiler water and domestic water must be
drained.

If antifreeze is used in boiler water, check concentration.
Boiler water (including additives) must be practically

non-toxic, having toxicity rating or class of 1, as list­ed in Clinical Toxicology of Commercial Products. A
maximum 50/50 mixture of inhibited propylene glycol
is recommended. Follow antifreeze manufacturer’s in­struction.

WARNING

Do not use automotive, ethylene glycol or pe­troleum-based antifreeze. Do not use any un­diluted antifreeze. This can cause substantial

property damage, serious injury, or death.

23

CHAPTER 5 - WATER HEATER MAINTENANCE

4. When draining is complete, close the hot water fau-

WARNING

cet and the domestic drain valve.

CHAPTER 5

Water from opened drain valves, unions and
other connections may be extremely hot. To
avoid substantial property damage, serious

injury, or death:

- Tighten all drain hose connections.

- Direct hot water away from all persons.

5.3.1 Draining Inner (Domestic Water) Tank.

BEST PRACTICE

There are 3 methods typically used in the drain­ing of the inner tank. The first method outlined
as Option 1 is to siphon the water out. This
method is typically the easiest to perform, but

may be lengthly in time to complete.

The second method, shown as Option 2, uses com­pressed air. This method is more complicated how-

ever it is generally quicker in draining the tank.

The final method, Option 3, use a pump to drain the
tank. As with Option 2, Option 3 is generally more

complicated, but is quicker in draining the tank.

NOTICE

Prior to draining the inner tank, ensure the fol-

lowing is completed:

• The snap-set wiring connection at the wa­ter heater is disconnected.

• The DHW system supply isolation valve is

closed.

• The outer (boiler water) tank pressure is less

than 15 psig

Reference domestic piping diagram, see Fig. 2

on page 7 thru Fig. 4 on page 8.

Draining Inner Tank - Option 1

1. Connect a hose to the domestic water drain valve
at the cold water inlet. The hose should extend to a
drain at oor level to allow siphoning of the domes­tic inner tank.

2. Open a hot water faucet at the highest point above
the water heater.

3. Open the domestic water drain valve to start the
siphoning of the domestic inner tank.

Draining Inner Tank - Option 2

1. Connect a hose to the domestic water drain valve
at the cold water inlet. Direct the hose to a proper
drain/suitable place for drainage.

2. Close the isolation valve on the DHW system hot
outlet of the water heater.

3. On the hot water outlet piping between the water
heater and the isolation valve install a shrader (air
tank) valve or some other tting or means that al­lows connection of an air hose from a compressor.

4. Open the domestic water drain valve on the cold
water inlet.

5. Apply compressed air at a maximum regulated
pressure of 40 psig.

6. When draining is complete, remove the air hose
and ttings needed to connect the air hose.

7. Close the domestic water drain valve on the cold
water inlet and open the isolation valve on the hot
water outlet.

Draining Inner Tank - Option 3

1. Connect the suction side of the pump to the domestic
water drain valve using a hose and/or piping ttings.

2. Connect a hose to the discharge side of the pump.
Direct the hose to a proper drain or a suitable place
for drainage.

3. Open a hot water faucet at the highest point above
the water heater.

4. Open the domestic water drain valve and start the
pump to begin draining the inner tank.

5. When draining is complete stop the pump, close
the hot water faucet and close the domestic drain
valve. Remove the pump and all hoses and ttings.

5.3.2 Draining Outer (Boiler Water) Tank

1. Disconnect snap set wiring connection at water
heater.

2. Close boiler water isolation valves between boiler
and water heater.

3. Connect hose to boiler water drain valve at water
heater. Open and drain water to a safe place.

4. To speed draining procedure, open manual air vent
on top of tank.

5. When draining is complete, close drain valve and
close manual air vent.

24

CHAPTER 6 - REPLACEMENT PARTS

6

1

4

Thermostat
Cover Plate

Assembly

5

Located Below Thermostat

Cover Plate Assembly

8

9

10

3

Fig. 24 - SMART Assembly

2

Fig. 25 - SMART Cover Plate Assembly

Item Part # Model Description

1 P3KITAV02 All Air vent, manual

2

3

4

5

6

7
(not shown)

8 P3KITWRS01 All Snap-set wire harness
9 P3KNB02 All Knob

10 P3CVR04 All Cover plate

P3KITTH01 All Aquastat - 160ºF residential
P3KITTH03 All Aquastat - 194ºF commercial
P3KITBTM02 SMART 30, 40, 50 60
P3KITBTM03 SMART 80, 100

Bottom cap
P3KITBTM04 SMART 120
P3KITTOP02 SMART 30, 40, 50 60

Top capP3KITTOP03 SMART 80, 100
P3KITTOP04 SMART 120
P3DW05 SMART 30
P3DW01 SMART 40
P3DW02 SMART 50

Drywell
P3DW03 SMART 60, 80
P3DW04 SMART 100, 120
P3WKITDT01 SMART 30
P3WKITDT02 SMART 40
P3WKITDT03 SMART 50
P3WKITDT04 SMART 60

Dip tube

P3WKITDT08 SMART 80, 100
P3WKITDT09 SMART 120
P3WKITDT01 SMART 30, 60
P3WKITDT02 SMART 40, 50
P3WKITDT08

(cut to length)

SMART 80, 100, 120

Dip tube, recirculation

CHAPTER 6

25

CHAPTER 7 - WATER HEATER SPECIFICATIONS AND PERFORMANCES

Auxiliary

Connection

Boiler Return

Hot Water Outlet

CHAPTER 7

A

Boiler Supply

C

B

D

Fig. 26 - SMART Dimensions - Side View

26

CHAPTER 7 - WATER HEATER SPECIFICATIONS AND PERFORMANCES

E

Auxiliary

Connection

F

Cold Water Inlet

Thermostat and

Cover Plate

Hot Water Outlet

Air Vent

Fig. 27 - SMART Dimensions - Top View

Table 2 - SMART Water Heater Specications

SMART

Model 30 40 50 60 80 100 120

Capacity Gal.

Domestic 28 36 46 56 70 95 119

Boiler 5 6 8 8 14 25 43

Heating Surface Sq. Ft. 13 16 20 24 28 36 42

Head Loss Boiler Side Ft.

Piping Connections Inches

Domestic Ø 3/4 3/4 3/4 3/4 1 1/2 1 1/2 1 1/2

Boiler Ø 1 1 1 1/4 1 1/4 1 1/2 1 1/2 2

Auxiliary Ø

Dimensions Inches

A 38 46 57 66 61 78 72

B

C 30 38 49 58 50 1/2 68 64

D 22 22 22 22 26 26 32

E 14 14 14 14 10 1/2 10 1/2 10 1/2

F 6 6 6 6 10 1/2 10 1/2 5

Dry well length Inches 25 29 37 47 47 51 51

Empty weight Lbs. 115 135 165 190 271 362 479

3/4 1 1 1/4 1 1/2 2 2 2 1/2

3/4 3/4 3/4 3/4 1 1/2 1 1/2 1 1/2

9 9 9 9 10 10 10

CHAPTER 7

27

CHAPTER 7 - WATER HEATER SPECIFICATIONS AND PERFORMANCES

Table 3 - SMART Water Heater Performance at 200°F boiler water supply (140°F DHW outlet)

CHAPTER 7

Model

Boiler Heating

Capacity

MBH

Peak Flow

Gal./10 min.

1st Hour Flow

Gal./Hour

Continuous

Flow

Gal./Hour

Circulator
Min. GPM

SMART 30 87 40 140 115 5

SMART 40 112 50 180 150 7

SMART 50 140 65 220 185 8

SMART 60 270 100 410 360 16

SMART 80 300 125 460 400 18

SMART 100 337 150 525 450 25

SMART 120 420 190 650 560 28

Conditions:

• 50ºF Domestic cold water inlet temperature

• 140ºF Domestic hot water outlet temperature

• 200ºF Boiler water supply temperature

Table 4 - SMART Water Heater Performance at 200°F boiler water supply (115°F DHW outlet)

Model

Boiler Heating

Capacity

MBH

Peak Flow

Gal./10 min.

1st Hour Flow

Gal./Hour

Continuous

Flow

Gal./Hour

Circulator
Min. GPM

SMART 30 115 60 235 210 8

SMART 40 130 70 270 240 9

SMART 50 180 95 370 330 12

SMART 60 320 145 635 590 21

SMART 80 340 165 690 630 24

SMART 100 380 185 775 700 26

SMART 120 445 235 915 820 30

Conditions:

• 50ºF Domestic cold water inlet temperature

• 115ºF Domestic hot water outlet temperature

• 200ºF Boiler water supply temperature

28

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32

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