TANKLESS WATER HEATER INSTALLATION · PDF fileHot Water Isolator Valve Assembly Tankless Water Heater Installation Diagrams Tankless Installation / Optional Return Circulation °F

TANKLESS WATER HEATER

INSTALLATION DIAGRAMS

Gas Pipe

Cold Water Pipe

Hot Water Pipe

Return Circulation LineUnion

Shut-off Valve

Circulation Pump

Pressure Relief Valve

Check Valve

Cold Water Isolator Valve Assembly

Hot Water Isolator Valve Assembly

Tankless Water Heater Installation Diagrams

Tankless Installation / Optional Return Circulation

° F

PRIORITY

POWERON/OFF

This drawing is intended as a guide only. It is not to be used as an alternative to

a professionally engineered project drawing. This drawing does not imply

compliance with local building codes. Installation may vary, depending on

installation location, and must be done in accordance with all local building

codes. Consult with local building officials prior to installation.

Legend

Tankless Water Heater

RemoteControl

Expansion Tank

Circulation Pump

Small 10 - 15 Gallon Point-of-Use Water Heater

Single Tankless Water Heater and Optional Return Circulation:One single, small capacity water heater that will serve to maintain the temperature of the recirculation loop. The recirculation loop shall be returned to the cold water inlet of the small tank-type water heater. It is recommended that the circulation pump be placed on a timer or controlled by an immersion thermostat.

Printed in U.S.A 01/09 Form No. RTG11140A

Drawn by: SMTEng Approval: RM

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




EZ-Link Manifold Installation / Optional Return Circulation

° F

PRIORITY

POWERON/OFF






Legend



RemoteControl

EZ-LinkCable

Expansion Tank

Circulation Pump


EZ-Link Manifold Installation and Optional Return Circulation:Two tankless water heaters of like models shall be installed in a parallel manifold, connected with the EZ-Link cable. Only one remote control will be used connected to a single tankless water heater. These units will feed a single, small capacity water heater that will serve to maintain the temperature of the recirculation loop. The recir-culation loop shall be returned to the cold water inlet of the small tank-type water heater. It is recommended that the circulation pump be placed on a timer or controlledby an immersion thermostat.

Printed in U.S.A 01/09 Form No. RTG11141


Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve










Legend



RemoteControl

EZ-LinkCable


EZ-Link Manifold Installation and Optional Return Circulation:Two tankless water heaters of like models shall be installed in a parallel manifold, connected with the EZ-Link cable. Only one remote control will be used connected to a single tankless water heater. Recirculation Option A: The recirculation loop shall be returned to the cold water inlet of the small tank-type water heater with the hot water outlet connected to the hot water line feeding the fixtures. The tank temperature and aquastat should be set 5˚F below the tankless thermostat setting, the timer set for peak demand periods. The pump shall be sized according to the loop head loss.Recirculation Option B: The recirculation loop shall be returned to the cold water manifold feeding the tankless. It is required that the circulation pump be placed on a timer and controlled by an immersion thermostat. The aquastat shall be set 10˚F below the thermostat setting of the tankless, the timer shall be set for peak demand periods. The pump shall be sized for 5 GPM @ 25’ of head plus the loop head loss.

Printed in U.S.A. 01/11 Form No. RTG11141 Rev 2

CirculationPump

Hot Water to Fixtures

Cold Water Supply

GasSupply

ExpansionTank

DedicatedReturn

DedicatedReturn

CirculationPump

RECIRCULATION OPTION A

RECIRCULATION OPTION B

ImmersionAquastat

ImmersionAquastat

Timer

Timer

F

PRIORITY

POWERON/OFF


Heavy Duty Tankless Manifold Equipment Schedule







Tan

kle

ss U

nit

s M

anif

old

ed

MIC

-18

0 C

on

tro

ller

MIC

S-1

80

Co

ntr

olle

r

MIC

-K*

Cab

le

AP

12

99

3C

Rel

ief

Val

ve

AP

13

89

2 Is

ola

tio

nV

alve

Kit

s †

Max

imu

m S

yste

m

Flo

w R

ate

(gp

m)

Min

. Ho

t Wat

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Hea

der

Siz

e (i

n.)

**

Min

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ld W

ater

H

ead

er S

ize

(in

.) *

*

Syst

em T

ota

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In

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t (b

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)

Min

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ura

l Gas

H

ead

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ize

(in

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**

Min

. LP

Gas

H

ead

er S

ize

(in

.) *

***

2 1 0 2 2 2 14.8 1 1 399,800 1 ¾

3 1 0 3 3 3 22.2 1 1 599,700 1 ¼ 1

4 1 0 4 4 4 29.6 1 ¼ 1 ¼ 799,600 1 ¼ 1

5 1 0 5 5 5 37 1 ½ 1 ½ 999,500 1 ¼ 1

6 1 0 6 6 6 44.4 1 ½ 1 ½ 1,199,400 1 ½ 1 ¼

7 1 1 7 7 7 51.8 2 2 1,399,300 1 ½ 1 ¼

8 1 1 8 8 8 59.2 2 2 1,599,200 2 1 ¼

9 1 1 9 9 9 66.6 2 2 1,799,100 2 1 ½

10 1 1 10 10 10 74 2 2 1,999,000 2 1 ½

11 1 1 11 11 11 81.4 2 2 2,198,900 2 ½ 1 ½

12 1 1 12 12 12 88.8 2 2 2,398,800 2 ½ 1 ½

13 1 1 13 13 13 96.2 2 ½ 2 ½ 2,598,700 2 ½ 2

14 1 1 14 14 14 103.6 2 ½ 2 ½ 2,798,600 2 ½ 2

15 1 1 15 15 15 111 2 ½ 2 ½ 2,998,500 2 ½ 2

16 1 1 16 16 16 118.4 2 ½ 2 ½ 3,198,400 3 2

17 1 1 17 17 17 125.8 3 3 3,398,300 3 2

18 1 1 18 18 18 133.2 3 3 3,598,200 3 2

19 1 1 19 19 19 140.6 3 3 3,798,100 3 3

20 1 1 20 20 20 148 3 3 3,998,000 3 3

OPTIONAL EQUIPMENT AND ACCESSORIESMIC-180 Multiple Unit Controller - controls up to 6 units

MICS-180 Multiple Unit Extender - add on to the MIC-180 for control of up to 20 units

MIC-K Cables Multiple Unit Control Cables, available in 16-, 32-, and 65-foot lengths

AP12993C Pressure Relief Valve - 150 PSI

AP13892 Isolation Valve Kit - includes shut-off valves

MIC-K cable length to be selected based upon water heater layout. ow ball valves should be used as a standard

Smooth copper pipe sizesBlack iron pipe sizes (nominal 7 in. w.c. pressure)Black iron pipe sizes (nominal 11 in. w.c. pressure)

*†**

*******

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Multiple Unit Manifold Installation

° F

PRIORITY

POWERON/OFF






Legend



RemoteControl

Multiple Unit Manifold Installation:Multiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. The manifold controller will manage the operation of the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Sched-ule, Form No. RTG11145, for details on pipe size and suggested equipment.



Manifold Controller

CommunicationCables


Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Multiple Unit Manifold Installation with Direct Recirculation

° F

PRIORITY

POWERON/OFF






Legend



RemoteControl

Expansion Tank

Circulation Pump

Multiple Unit Manifold Installation with Direct Recirculation:Multiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. The manifold controller will manage the operation of the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Schedule, Form No. RTG11145, for details on pipe size and suggested equip-ment. The return circulation line shall be connected back to the cold water manifold, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heater, atleast 5 GPM at 25 foot of head. Also, an expansion tank must be installed on the system.



Manifold Controller

Communication Cables


Multiple Unit Manifold Installation with Alternate Indirect RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Sched-ule, Form No. RTG11145, for details on pipe size and suggested equipment. The hot water main return circulation shale be installed according to code and shall circulate through a small storage vessel or point of use water heater that is not connect to

electricity. The tankless water heaters shall maintain the temperature of the storage vessel through a secondary circulation loop with a thermostatically controlled pump. The secondary circulation system shall be plumbed so that hot water from the tankless does not return directly to the tankless inlet until it has passed through the storage vessel and so that the hot water main return does not directly recirculate through the tankless water heaters. An immersion aquastat shall control the operation of the secondary circulation pump so that when the temperature of the storage vessel is reached it will turn off the pump. It is recommended that the hot water main circulation line also be controlled by an aquastat and or timer.

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Multiple Unit Manifold Installation with Alternate Indirect Recirculation

° F

PRIORITY

POWERON/OFF






Legend



RemoteControl

Expansion TankCirculation Pump



Manifold Controller


Circulation Pump


or Storage Tank

Hot Water Supply

Cold Water

Return

Expansion Tank

Gas

ImmersionAquastat


Multiple Unit Manifold Installation with Dual Temperature RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate

through the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Schedule, Form No. RTG11145, for details on pipe size and suggested equip-ment. The high temperature return circulation line shall be connected back to the main cold water manifold, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heaters. The low/second temperature return circulation line will be connected back to a small point-of-use tank-type water heater, with a circulation pump controlled by a timer and/or an immersion thermostat control. The tank-type heater will maintain the temperature of the second recirculation loop. Two expansion tanks must be installed, one on each recirculation system.

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Multiple Unit Manifold Installation with Dual Temperature Recirculation

° F

PRIORITY

POWERON/OFF






Legend



RemoteControl

Expansion Tank

Circulation Pump



Manifold Controller


Circulation Pump


Thermostat set to 110˚F

Thermostatic Tempering Valve

110˚F Water Supply

140˚F Water Supply

Cold Water

110˚F Return

140˚F Return

Expansion Tank


Single Unit Installation with Dual Temperature RecirculationA single tankless water heater shall be installed using code-approved isolation valves and unions to allow service. Piping or the plumbing manifold should be properly sized for the tankless water heater being installed. The high temperature

return circulation line shall be connected back to the main cold water manifold, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heaters. The low/second temperature return circulation line will be connected back to a small point-of-use tank-type water heater, with a circulation pump controlled by a timer and/or an immersion thermostat control. The tank-type heater will maintain the temperature of the second recirculation loop. Two expansion tanks must be installed, one on each recirculation system.

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Dual Temperature Recirculation

° F

PRIORITY

POWERON/OFF






Legend


RemoteControl

Expansion Tank

Circulation Pump


Circulation Pump




110˚F Water Supply

140˚F Water Supply

Cold Water

110˚F Return

140˚F Return

Expansion Tank


Single Unit Installation with Dual Temperature RecirculationA single tankless water heater shall be installed using code-approved isolation valves and unions to allow service. Piping or the plumbing manifold should be properly sized for the tankless water heater being installed. The high temperature return circulation line shall be connected back to the cold water input of the Booser Heater, and include a check valve and a circulation pump that is on a timer and/or an immersion thermostat control. The pump must be sized properly for the system and head loss through the tankless water heaters. The low/second temperature return circulation line will be connected back to the cold water main at the tankless water heater, with a circulation pump controlled by a timer and/or an immersion thermostat control. The booser heater will maintain the temperature of the second recirculation loop. Two expansion tanks must be installed, one on each recirculation system.

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Dual Temperature Recirculation

° F

PRIORITY

POWERON/OFF






Legend


RemoteControl

Expansion Tank

Circulation Pump


Circulation Pump

Small 10 Gallon Booster Water Heater



180˚F Water Supply

120˚F Water Supply

Cold Water

180˚F Return

120˚F Return

Expansion Tank


Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve










Legend



RemoteControl

EZ-LinkCable


EZ-Link Manifold Installation and Optional Return Circulation:Two tankless water heaters of like models shall be installed in a parallel manifold, connected with the EZ-Link cable. Only one remote control will be used connected to a single tankless water heater. Recirculation Option A: The recirculation loop shall be returned to the cold water inlet of the small tank-type water heater with the hot water outlet connected to the hot water line feeding the fixtures. The tank temperature and aquastat should be set 5˚F below the tankless thermostat setting, the timer set for peak demand periods. The pump shall be sized according to the loop head loss.Recirculation Option B: The recirculation loop shall be returned to the cold water manifold feeding the tankless. It is required that the circulation pump be placed on a timer and controlled by an immersion thermostat. The aquastat shall be set 10˚F below the thermostat setting of the tankless, the timer shall be set for peak demand periods. The pump shall be sized for 5 GPM @ 25’ of head plus the loop head loss.

Printed in U.S.A. 01/11 Form No. RTG11141 Rev 2

CirculationPump

Hot Water to Fixtures

Cold Water Supply

GasSupply

ExpansionTank

DedicatedReturn

DedicatedReturn

CirculationPump

RECIRCULATION OPTION A

RECIRCULATION OPTION B

ImmersionAquastat

ImmersionAquastat

Timer

Timer

F

PRIORITY

POWERON/OFF

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Tankless Installation With Air Handler and Domestic Water






Legend

Single Tankless Water Heater with Domestic Water and Home Heating:One tankless water heater installed in a dual use system with domestic water and an air handler for home heating. The system will supply a maximum of 140˚F water to the air handler. A thermostatic tempering valve will provide control for the 120˚F domestic water temperature. The heating system will be controlled by a room thermostat or environmental control system. There will be a priority switch (flow detector) installed in the cold water source line. The priority switch will deactivate the circulation pump and air handler while water is being drawn from the cold water supply, such as for showering. The priority switch will reacti-vate the circulation pump and air handler when the domestic water supply is not in use. The circulation pump must be able to supply a minimum of 5 GPM at 35’ of head loss and shall be controlled by the room thermostat or environmental control system. An expansion tank shall be installed on the system to control thermal expansion when the air handle is in use. The air handler, circulation pump, and tankless water heater should be sized by a professional contractor or mechanical engineer to ensure proper operation.


° F

PRIORITY

POWERON/OFF

Tankless Water Heater Remote

Control

Expansion Tank

Circulation Pump


120˚F Domestic Water Supply

Cold Water

Air Handler30,000 to 60,000

Btu/hr with 140˚F Water

RoomThermostat

Priority Switch

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve









Legend




Multiple Unit Manifold Installation with Buffer Storage RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communica-tion cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Schedule, Form No. RTG11145, for details on pipe size and suggested equipment. The storage vessel will be fed direct from the tankless and act as a buffer between the fixtures and tankless. A Taco 0011 pump or greater shall be used to circulate the water from the storage vessel back to the tankless units and an immersion thermostat in the storage vessel will control the circulation pump so that the tankless are used only when the temperature of the tank drops. The tankless will also operate when a demand is placed on the system such as a hot water use fixture is turned on. A return circulation line from the fixtures will be feed back to the storage tank with an appropriately sized circulation pump, placed on a timer to limit the hours of operation.

Multiple Unit Manifold Installation with Buffer Storage Tank

° F

PRIORITY

POWERON/OFF

RemoteControl

Expansion Tank



Manifold Controller


Circulation Pump

Hot Water Supply Cold Water

Gas

ImmersionAquastat

Hot Water To Fixtures

FIxture Return Line

Circulation Pump


Tank

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Tank

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Tankless Water Heater Installation DiagramsMultiple Unit Manifold Installation Stacked Configuration

° F

PRIORITY

POWERON/OFF


Tankless Water Heater Remote

Control

Expansion Tank

Gas Pipe

Cold Water Pipe

Hot Water Pipe

Return Circulation LineUnionShut-off Valve Circulation

PumpPressure Relief Valve

Check Valve



This drawing is intended as a guide only. It is not to be used as an alternative to a professionally engineered project drawing. This drawing does not imply compliance with local building codes. Installation may vary, depending on installation location, and must be done in accordance with all local building codes. Consult with local building officials prior to installation.

Printed in U.S.A 03/08 Form No. PII030706


Manifold Controller


Hot Water Supply

Cold Water

Gas

Expansion Tank

Return Line

Circulation Pump

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve



Tankless Water Heater Installation DiagramsTankless Installation / Demand Return Circulation

° F

PRIORITY

POWERON/OFF

This drawing is intended as a guide only. It is not to be used as an alternative

to a professionally engineered project drawing. This drawing does not imply




Legend


RemoteControl

ExpansionTank

Printed in U.S.A. 06/08 Form No. RTG11154

Room Motion Sensor or Trigger Switch Check with the Manufacture for

options

Shower or Bath

Lavatory or Sink Faucet

Kitchen or Sink Faucet

Metlund S-70T or S-02T D’MAND® System

or equivalent

Single Tankless Water Heater and Demand Return Circulation: A demand return circulation system is one that the pump is controlled by system as to where the pump is only operated for a short duration to bring hot water to the desired fixture. A demand system operates with either a push button or motion detector and shut off as soon as hot water reaches the fixture. A circulation pump with a timer and/or aquastat is not considered a demand pump as they can continuously run. The Metlund D’MAND® System is an alternative to a hot water circulation loop and operates in a manner

that only runs when hot water is needed at the fixture. A demand system of this type does not impact the warranty of our tankless water heaters.This drawing demonstrates a basic installation of a demand system with a tankless water

heater. Follow the manufactures recommended installation instructions and guidelines. Drawn by: SMTEng Approval: RM

Multiple Unit Manifold Installation with Buffer Tank and Demand RecirculationMultiple tankless water heaters of like models shall be installed in a parallel manifold, connected with a common manifold control through communication cables, with only one remote control connected to the manifold controller. The units will operate in a random sequence depending upon the water flow rate through the system. Each tankless water heater shall be installed using code-approved isolation valves and unions to allow service to an individual tankless water heater without taking the entire system offline. Piping or the plumbing manifold should be properly sized for the number of tankless water heaters being installed. See the Manifold Equipment Sched-ule, Form No. RTG11145, for details on pipe size and suggested equipment. The hot water main shall be installed according to code and shall pass through a small water heater or storage tank that will be used as a buffer tank to eliminate the cold water

sandwich effect from short cycle usage. The buffer tank shall have openings sized to match the manifold pipe size. The main hot water line will feed branch fixtures after the buffer tank. A demand or thermostatically controlled circulation pump, such as the Metlund S-70T or S-02T, or the Laing ACT-909, shall be installed on each branch at the furthermost fixture. These pumps will operate to draw hot water to the fixture by pushing the cold water back through the cold water supply line. When the hot water reaches a given temperature as set by the pump manufac-ture, the pump will shut off. This application is ideal in salons, public rest rooms, and nursing homes where the draw demands on hot water are short and spaced apart.

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve




Multiple Unit Manifold Installation with Buffer Tank and Demand Recirculation

° F

PRIORITY

POWERON/OFF






Legend



RemoteControl

Expansion Tank



Manifold Controller



With Openings Large Enough to Accommodate Manifold Pipe Size

Cold Water

Gas


Room Motion Sensor, Push Button Trigger

Switch, or Timer Control

Kitchen or Sink Faucet

Metlund S-70T or S-02T D’MAND® System

or Laing ACT-909 System

Gas Pipe

Cold Water Pipe

Hot Water Pipe


Shut-off Valve

Circulation Pump


Check Valve



Tankless Water Heater Installation DiagramsTankless Installation as Solar Booster

F

PRIORITY

POWERON/OFF






Legend


RemoteControl

Expansion Tank

Single Tankless Water Heater as a Solar Booster :A tankless unit will be connected inline with the hot water output of a solar storage tank and the hot water supply to the fixtures. The supply to the tankless must be connected to a thermostatic mixing valve so

that the tankless does not receive water exceeding 140F. The tankless unit(s) should be sized according to the total demand of the application. When the water temperature drops below the T-stat setting on the tankless and the flow is great enough, the tankless unit will engage. Refer to the tankless Use and Care manual for installation instructions and recommendations for the tankless water heater.

Printed in U.S.A 06/10 Form No. RTG11160 Rev 2

SolarStorage Tank

SolarPanels

Domestic Hot Water Supply

Thermostatic Tempering Valve *

NOTE: A temperating valve must be installed on the hot water outlet from the solar tank feeding the inlet to the tankless water heater.

Water Supply to Tankless

Domestic Cold Water Supply

Solar Fluid


RTG20147 Concentric Direct Vent Kit - Typical Installation







The RTG20147 Kit Contains: (1) 3/5" Appliance Adapter - RTG20144(1) 3/5" Horizontal Termination - RTG20128(1) 94 Degree 3/5" Elbow - No Rheem Part Number (2) 12" Wall Plate, Screws - No Rheem Part Number(1) 3/5" Concentric 12" Vent Pipe - RTG20151R(1) Relief Valve - AP12993C(1) 10ft T-Stat Wire - RTG20009-1

ApplianceAdapter

94 DegreeElbow

WallPlate

WallPlate

12” VentPipe

HorizontalTermination

See Drawing RTG11140 for typical piping installations.

RTG-95DV Direct Vent Water HeaterWater Heater(s) shall be internally mounted, in-

stantaneous, multiple point-of-use, gas fired, direct vent, water heater(s) design certified to the ANSI Z21.10.3 standard for gas-fired water heaters. (Each) Water Heater shall produce no more than 55 ppm NOx (40 ng/J) emissions when tested in accordance with the Rules and Regulations of the South Coast Air Quality Management District (SCAQMD). Said water heater(s) shall be configured to operate with ____________(natural/propane) gas and a 120 volt/60 Hz AC power source.

Unit(s) shall have a BTU input range of11,000 BTU/hr to 199,900 BTU/hr, a minimum recovery efficiency rating of 82%, a minimum hot water outlet capacity of 9.5 gallon per minute (with a 35 °F temperature rise), and a minimum operating flow rate of 0.26 (0.40 activation) gallon per minute (with a 35 °F tem-perature rise). Water Heater(s) shall be microproces-sor controlled and utilize a direct electronic ignition system (with no standing pilot), fully modulating gas control valve, turbine water flow meter, automatic electro-mechanical water flow control valve, and wa-ter temperature thermistors to maintain outlet water temperature between ± 2 °F of setpoint tempera-ture. Unit(s) shall incorporate the following internal safety devices: incomplete combustion sensing burner technology, film-type thermal overheat pro-tection covering entire heat exchanger, flame failure lockout, internal freeze protection for ambient tem-peratures as low as –30 °F, and lockout protection in the event of a blocked flue.

Water Heater(s) shall be provided with a remote temperature thermostat with an adjustable setpoint range of 85 °F to 140 °F. Unit(s) shall also be capable of storing and displaying up to 8 diagnostic mainte-nance codes, via the display on the remote tempera-ture thermostat controller(s). Water Heater(s) shall have a copper heat exchanger warranted against material defects or workmanship for a period of 12 years from the date of purchase, or 3 years from date of purchase when used as a circulating water heater within a hot water circulation loop or when used in a commercial application. Unit(s) shall have stain-less steel burners, cast aluminum gas control valve/gas connection, and solid brass inlet and outlet wa-ter connections. Unit(s) shall also be provided with a 120 volt/60 Hz AC power cord. These and all other parts shall be warranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulating water heater within a hot water circulation loop or when used in a commercial ap-plication.

Water Heater(s) shall be suitable for use in mul-tiple unit electronic manifold installations. Units shall have the ability to be manifolded electronically in configurations from 2-20 units. Temperature con-trol and diagnostic functions for all water heaters in manifold installations shall be controlled via a single remote temperature thermostat. Manifold installa-tions utilizing 2 water heaters shall be accomplished with simple cable-only interconnection (EZ-Link). Manifold installations utilizing up-to water heaters shall utilize an internal electronic manifold control-ler (MIC-6) which, or up-to 20 units with an external manifold controller system (MIC-185/MICS-180).

RTG-95X Outdoor Water Heater Water Heater(s) shall be externally mounted,

instantaneous, multiple point-of-use, gas fired, di-rect vent, water heater(s) design certified to the ANSI Z21.10.3 standard for gas-fired water heaters. (Each) Water Heater shall produce no more than 55 ppm NOx (40 ng/J) emissions when tested in accor-dance with the Rules and Regulations of the South Coast Air Quality Management District (SCAQMD). Said water heater(s) shall be configured to operate with ____________(natural/propane) gas and a 120 volt/60 Hz AC power source.

Unit(s) shall have a BTU input range of 11,000 BTU/hr to 199,900 BTU/hr, a minimum recovery ef-ficiency rating of 82%, a minimum hot water outlet capacity of 9.5 gallon per minute (with a 35 °F tem-perature rise), and a minimum operating flow rate of 0.26 (0.40 activation) gallon per minute (with a 35 °F temperature rise). Water Heater(s) shall be microprocessor controlled and utilize a direct elec-tronic ignition system (with no standing pilot), fully modulating gas control valve, turbine water flow meter, automatic electro-mechanical water flow control valve, and water temperature thermistors to maintain outlet water temperature between ± 2 °F of setpoint temperature. Unit(s) shall incor-porate the following internal safety devices: film-type thermal overheat protection covering entire heat exchanger, flame failure lockout, and inter-nal freeze protection for ambient temperatures as low as –30 °F.

Water Heater(s) shall be provided with a remote temperature thermostat with an adjustable setpoint range of 85 °F to 140 °F. Unit(s) shall also be capable of storing and displaying up to 8 diagnostic mainte-nance codes, via the display on the remote tempera-ture thermostat controller(s). Water Heater(s) shall have a copper heat exchanger warranted against material defects or workmanship for a period of 12 years from the date of purchase, or 3 year from date of purchase when used as a circulating water heater within a hot water circulation loop or when used in a commercial application. Unit(s) shall have stainless steel burners, cast aluminum gas control valve/gas connection, and solid brass inlet and outlet water connections. These and all other parts shall be war-ranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulat-ing water heater within a hot water circulation loop or when used in a commercial application.

Water Heater(s) shall be suitable for use in mul-tiple unit electronic manifold installations. Units shall have the ability to be manifolded electronically in configurations from 2-20 units. Temperature con-trol and diagnostic functions for all water heaters in manifold installations shall be controlled via a single remote temperature thermostat. Manifold installa-tions utilizing 2 water heaters shall be accomplished with simple cable-only interconnection (EZ-Link). Manifold installations utilizing 2 water heaters shall be accomplished with simple cable-only intercon-nection (EZ-Link). Manifold installations utilizing up-to water heaters shall utilize an internal electronic manifold controller (MIC-6) which, or up-to 20 units with an external manifold controller system (MIC-185/MICS-180).

RTG-95 Commercial InstallationWater Heater(s) shall be convertible to operate

at higher temperature rating for a commercial ap-plication. A conversion kit; containing a program chip, commercial warranty, conversion decal, and instructions, for each specific mode is available. This program chip will upgrade the programming in the water heater(s) to allow an adjustable temperature setpoint range from 85 °F to 185 °F.

Water Heater(s) used in a commercial installation with a commercial conversion kit installed shall have a copper heat exchanger warranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulating water heater within a hot water circulation loop. Unit(s) shall have stainless steel burners, cast aluminum gas control valve/gas connection, and solid brass inlet and outlet water connections. These and all other parts shall be war-ranted against material defects or workmanship for a period of 5 years from the date of purchase, or 3 year from date of purchase when used as a circulat-ing water heater within a hot water circulation loop.

While the RTG-95 model carries and NSF 5 Rating it cannot be used as a booster to supply a commer-cial dishwasher or other equipment requiring 180F water for sanitation. A NSF approved booster should be used for those applications.

Tankless Water Heater SpecificationRTG-95 Series Tankless Engineering Specification


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