Bosch GWH 2700 ES LP, GWH 2700 ES NG User Manual

MODEL GWH 2700 ES NG and GWH 2700 ES LP INDOOR MODEL

Temperature Modulated with Electronic Ignition Suitable for heating potable water only Not approved for space heating purposes

(Intended for variable flow applications)

GWH 2700 ES NG - Natural Gas GWH 2700 ES LP - Liquefied Petroleum (LP) Gas

Warning: If the information in this manual is not

followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapor and liquids in the vicinity of this or any other appliance.

Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier. In the Commonwealth of Massachusetts this product must be installed by a licensed plumber or gas fitter.

Upon completion of the installation, these instructions should be handed to the user of the appliance for future reference.

6 720 608 542 (2009/03) US

What to do if you smell gas

• Close gas valve. Open windows.

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• If you cannot reach your gas supplier, call the fire department.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions

• Installation and service must be performed by a qualified installer, service agency or the gas supplier.

Index

1 Warning 3

2 Appliance details 4

2.1 Features 4

2.2 Specifications (Technical data) 5

2.3 Unpacking the heater 6

2.4 General rules to follow for safe operation 7

2.5 Dimensions and Minimum installation clearances 8

3 Installation instructions 9

3.1 Tools required for installation 9

3.2 Introduction 9

3.3 Venting 9

3.4 Combustion air requirements 20

3.5 Proper location for installing your heater 21

3.6 Heater placement and clearances 21

3.7 Mounting installation 21

3.8 Gas piping & connections 22

3.9 Water connections 25

3.10 Water quality 25

3.11 Domestic hot water recirculation 26

3.12 Measuring gas pressure 27

6 Maintenance and service 32

6.1 Annual maintenance 32

6.2 Winterizing for seasonal use 32

6.3 Mineral scale build-up 33

6.4 Adjusting CO2 (carbon dioxide) 33

6.5 Program values 36

6.6 Control board diagnostics 37

7 Troubleshooting 38

7.1 Introduction 38

7.2 Burner do not ignite when hot water is turned ON 38

7.3 Water is too hot 38

7.4 Water is not hot enough 38

7.5 Low water flow/pressure 39

7.6 Hot water temperature fluctuates at tap 39

7.7 Noisy burner/heater during operation 39

8 Problem solving 41

8.1 Error code diagnostics 41

9 Electrical diagram 45

4 Electrical connections 28

4.1 Electrical power supply 28

4.2 Position of the fuses in control unit 28

5 Operation instructions 29

5.1 LCD Display functions 29

5.2 For your safety read before operating your water heater 30

5.3 Power 30

5.4 Temperature selection 30

5.5 Use of optional remote control accessory (part no. TSTAT2) 31

5.6 Operation 31

5.7 Reset button 31

5.8 Program button 31

5.9 Locked condition 31

10 Sensor resistance charts 46

11 GWH 2700 ES Functional scheme 48

12 Interior components diagram

and parts list 49

12.1 Interior components 49

12.2 Components diagram 51

13 Protecting the environment 57

14 Limited Warranty 58

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Warning

1 Warning

For your safety

Do not store or use gasoline or other flammable, combustible or corrosive vapors and liquids in the vicinity of this or any other appliance.

Warning: Carefully plan where you install the heater. Correct combustion air supply and flue pipe installation are very important. If a gas appliance is not installed correctly, fatal accidents can result, such as carbon monoxide poisoning or fire.

Warning: Exhaust gas must be vented to outside using stainless steel vent material suitable for category III vent systems and temperatures up to 480°F. Vent piping must be sealed gas-tight to prevent possibility of flue gas spillage, carbon monoxide emissions and risk of fire, resulting in severe personal injury or death. Approved vent terminators must be used when penetrating to the outside.

Warning: The appliance should be located in an area where leakage of the heater or connections will not result in damage to the area adjacent to the appliance or to lower floors of the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance. The pan must not restrict combustion air flow.

Warning: The maximum inlet gas pressure must not exceed the value specified by the manufacturer and that the minimum value listed is for the purposes of input adjustment.

Warning: If a water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or local plumbing inspector on how to control this situation.

Warning: Place the heater in a location where water leaks will do NO DAMAGE to adjacent areas or lower floors.

Warning: Field wiring connections and electrical grounding must comply with local codes, or in the absence of local codes, with the latest edition of the National Electric Code, ANSI/NFPA 70, or in Canada, all electrical wiring must comply with the local codes and the Canadian Electrical Code, CSA C22.1 Part 1.

Warning: Shock hazard: line voltage is present. Before servicing the water heater, unplug power supply cord from outlet. Failure to do so could result in severe personal injury or death.

Warning: The heater must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0.5 psig.

Warning: Keeping appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

Warning: Do not obstruct the flow of combustion and ventilation air.

Warning: Precautions must be taken prior to manually operating the relief valve to avoid contact with hot water coming out of the relief valve and to prevent water damage.

Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can use improper and dangerous operation. Verify proper operation after servicing.

Warning: In order for the freeze prevention kit to provide adequate protection,120V AC must always be supplied to the water heater.

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Appliance details

HOT

BURN

D A N G E R

Watertemperatureover125°Fcan causesevereburnsinstantlyor deathfromscalds.

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

Seeinstructionmanualbefore settingtemperatureatwater heater.

Feelwaterbeforebathingor showering.

6720608643-16.1AL

Warning: The anti freeze kit is designed to provide protection for the water heater down to approximately 5°F for short term conditions only. It will not protect the appliance in areas where the temperature is routinely expected to be below freezing.

B The anti freeze kit will not protect

plumbing outside the appliance from freezing. Precautions should be taken.

B Always drain the water heater if it will be

exposed to long term freezing conditions. See Section 6.2 Winterizing for seasonal use.

Warning: If a relief valve discharges periodically, this may be due to thermal expansion in a closed water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation. Do not plug the relief valve.

FCC: This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

2 Appliance details

2.1 Features

Parts

• Key Pad interface control

• High power pre-mix compact burner with low NOx emissions

• Modulating Gas Valve with constant gas:air ratio control

• Modulating water valve for improved comfort and temperature control.

High quality materials for long working life

• Copper heat exchanger

• High efficiency Ceramat Burner

• Compact space saver: mounts on a wall with a supplied bracket.

Features

• Real-time diagnostics for troubleshooting/informational purposes

• LCD Display with backlight

• On/Off and Temperature control switches

• Reset button

• Program button (Selectable temperature default)

• Failure codes for easy diagnostics and repair

• Easily removable one-piece cover

• Built in freeze prevention.

Note: The freeze prevention is designed to provide protection for the water heater down to approximately 5°F for short term conditions only. It will not protect the appliance in areas where the temperature is routinely expected to be below freezing.

- The freeze prevention will not protect plumbing outside

the appliance from freezing. Precautions should be taken. Accessories (Bosch part #)

• Optional wireless remote control accessory to operate with the appliance (TSTAT2)

• Cascading kit (TLINK)

• Outdoor kit (AQOK)

• Gas conversion kit (8719002176)

• Vertical vent kit (ESVVT)

• Horizontal vent kit (AQ3ES1))

• Stainless steel bird screen (L2594) (fits into a 3” PCV fitting - Intake vent).

Fig. 1

BOSCH is constantly improving its products, therefore specifications are subject to change without prior notice.

1) AQ3 vent kit is compatible with this appliance but requires the purchase of an additional 12" piece of straight pipe to meet minimum vent length requirements. The aluminum flex piping included with this kit is not permissible for use with this appliance.

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Appliance details

2.2 Specifications (Technical data)

Approved in US/Canada

Capacity

Maximum flow rate: 7.15 GPM (27 l/min) at a 45°F (25°C) rise.

Maximum output

160,500 Btu/h (47.0 kW)

Maximum input

199,000 Btu/h (58.3 kW)

Efficiency in %

Thermal efficiency > 82%

Min. Input

19,900 Btu/h (5.8 kW)

Temperature Control

Selection range: 100°F (38°C) - 140°F (60°C) Default temperature: 122°F (50°C) Stability: +/- 2°F (+/- 1°C)

Gas Requirement

Gas connection (inches) - ¾”

Inlet gas pressure under operation (with a high hot water flow rate)*

• Propane: 8” - 13” water column

• Natural Gas: 3.5” - 10.5” water column. * To measure gas pressure, see Measuring Gas

Pressure, chapter 3.12.

Dimensions

• Depth (in): 11¼” (286 mm)

• Width (in): 17

” (452 mm)

• Height (in): 30½” (775 mm)

• Weight: 67 pounds (30,5 kg).

Gas types

Natural Gas. LP Gas. Converting the gas type can only be done by a certified gas technician with a calibrated CO2 analyzer. Call Bosch Water Heating through

thermotechnology corp.

for conversion instructions.

Bosch

Voltage

120 V AC (60 Hz) nominal

Amperage

Idle - 40 mA Operation - ≤ 2.5 A

Noise

45 - 65 db (A)

Safety devices

• Flame failure device (ionization flame rod sensor)

• Pressure relief valve (supplied with heater)

• Over heat prevention (temperature limiter)

• Inlet temperature sensor

• Outlet temperature sensor

• Backflow temperature sensor.

Water

• Hot water connection (inches) - ¾”

• Cold water connection (inches) - ¾”

• Water valve material: Polymer (PPS) (Polypropylene Sulfid)

• Minimum water flow: 0.65 gallon/minute (2,5 l/m). Note: Activation varies with inlet water temperatures from 0.65 - 1.6 gallon/minute.

• Minimum recommended water pressure: 30 PSI (2.07 bar)

• Minimum recommended well pressure: 40 PSI (2.75 bar), see chapter 3.9.

• Connections: – Bottom of heater

Combustion

• NOx ≤ 40 Ng/J

Joule of heat output).

(Nanograms of NOx (calculated as NO2) per

• CO ≤ 250 ppm (measured)

• CO

level set from factory, see chapter 6.4.

Water protection

IP X4 (protection against water drops)

If appliance is installed at elevations above 2000ft, refer to section 3.3.6 Fan speed adjustment.

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Appliance details

2.3 Unpacking the heater

Before installing the unit, be certain you have the correct heater for your type of Gas: Propane or Natural Gas. Identification labels are found on the

shipping box, and on the rating plate which is located on the right side panel of the cover.

Fig. 2 Rating plate

A Serial number B Type of gas

To remove front cover

B Loosen the two Philips head screws located on

bottom rear of cover (see Fig. 3).

Fig. 3 Loosen the two screws

B Lift front cover panel upward and remove.

The box includes:

• GWH 2700 ES

• Pressure relief valve (150 psi / 200,000 Btu rating)

• Bracket for wall hanging the heater

• Exhaust vent adaptor (with 4 screws and gasket provided)

• Combustion air inlet adaptor (with 3 screws and gasket provided)

• Installation manual (manual can be downloaded at www.boschhotwater.com)

• Product registration card

• Energy Guide label.

Please complete and return the enclosed product registration card.

The GWH 2700 ES is not approved or designed for:

• Manufactured (mobile) homes, boats or any mobile installation (modular homes are acceptable for installation)

• Use above 8000 ft A.S.L. altitude (see page 18)

• Outdoor installation without installation of Outdoor kit (AQOK)

• Space heating purposes

• Preheated inlet water supply.

Fig. 4 Removing the front cover

To remove combustion cover (service only)

B Open the four clips and remove the combustion

cover see Fig. 5.

Fig. 5 Remove the combustion cover

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2.4 General rules to follow for safe operation

1. You must follow these instructions when you install your heater. In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/ NFPA 54. In Canada: The Installation must conform with CGA B149.(1,2) INSTALLATION CODES and /or local installation codes.

B 2. Carefully plan where you install the heater. Correct

combustion air supply and vent pipe installation are very important. If not installed correctly, fatal accidents can occur, such as carbon monoxide poisoning or fire.

B 3. When the unit is installed indoors and ROOM

SEALED (twin pipe) it is permitted to be located in bathrooms, bedrooms and occupied rooms that are normally kept closed. See chapter unit will be installed indoors and use indoor combustion air, the place where you install the heater must have enough ventilation. The National Fuel

Gas Code does not allow UNSEALED gas fired water heater installations in bathrooms, bedrooms or any occupied rooms normally kept closed. See chapter

(

page 20

B 4. You must vent your heater. See

VENTING.

B 5. The appliance and its gas connection must be leak

tested before placing the appliance in operation. The appliance must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve (not supplied with heater) during any pressure testing at pressures in excess of ½ Psig (3.5 kPa).

B 6. Keep water heater area clear and free from

combustibles and flammable liquids. Do not locate the heater over any material which might burn.

B 7. Correct gas pressure is critical for the proper

operation of this heater. Gas piping must be sized to provide the required pressure at the maximum output of the heater, while all the other gas appliances are in operation. Check with your local gas supplier, and see the section on connecting the gas supply. See Section 3.8, page 17.

B 8. Should overheating occur or the gas supply fail to

shut off, turn off the gas supply at the manual gas shut off valve, on the gas line. Note: manual gas shutoff valve is not supplied with the heater but must be field installed.

B 9. Do not use this appliance if any part has been

underwater. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been underwater.

3.5

(

3.3 (page 9

page 21

) and

chapter 3.3

). If the

3.4

Appliance details

10. Failure to install heater correctly may lead to unsafe operation and void the warranty.

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Appliance details

6720608158-04.2AL

res et

5 ¼"

30 ½"

17 "

5 ¼"

11 ¼"

2 ¾"

6 ½"

2 "

5 ¼"

2 "

4 "

6 "

2.5 Dimensions and Minimum installation clearances

Fig. 6 Dimensions

1 On/Off button 2 Reset button 3 Program key 4 Power ON or stand-by LED 5 LCD display 6 Up button 7 Down button

Fig. 7 Minimum clearances

Note: For servicing access, a 2ft clearance to front cover is recommended.

TOP (A) 12”

FRONT (B) 1”

BACK 0”

SIDES 1”

FLOOR (C) 12”

Table 1 Minimum clearances

Model GWH 2700 ES

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3 Installation instructions

Installation instructions

3.1 Tools required for installation

• Philips head screwdriver

• Flat head screwdriver

• Adjustable wrench

• Level

• Thermometer

• Standard plumbing tools

• Manometer

• Drill

• Pipe wrench

• Adjustable pliers

• Pipe fitting tools

• Hacksaw

• Hole saw.

3.2 Introduction

Please follow these instructions. Failure to follow instructions may result in:

B Damage or injury. B Improper operation. B Loss of warranty.

If you are unable to perform the tasks required to install this heater properly, please contact a locally licensed plumber or gas technician.

Common installation practice is to determine the venting/intake system layout and penetration and then work back to the heater.

3.3 Venting

Warning: Do not reduce the vent

(exhaust and combustion) pipe sizes and do not common vent with any other vented appliance or stove.

Warning: Approved terminators must be used for inlet and exhaust vent systems to prevent rain from entering the appliance. Failure to do so may result in damage to the appliance. This failure is not covered under the manufacturer’s warranty.

Caution: The vent system must be installed by a qualified installer in accordance with these instructions. If improperly installed, a hazardous condition such as explosion or carbon monoxide poisoning could result. Bosch Water Heating will not be responsible for improperly installed appliances.

Warning: In areas where outside temperatures routinely come close to freezing, sealed combustion operation is required. Use separate terminations for combustion and vent, which must be installed on the same wall or roof surface, however never facing the direction of prevailing winds. Failure to do so may result in heat exchanger freezing up and bursting. This failure is not covered under the manufacturer's warranty.

3.3.1 Vent material

Establish vent clearances that comply with the vent manufacturer's specifications. In all cases, follow local codes. See Table 2.

Diam. Material

Exhaust Vent

3 or 4 inches Sealed single wall stainless steel

(AL29-4C)

Warning: Failure to vent the exhaust gases to the outside with sealed stainless steel vent pipe (AL29-4C) may result in dangerous flue gases filling the structure in which it is installed.

Warning: Do not mix vent pipe or joining methods from different manufacturers.

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Intake Vent

Table 2 Venting Specifications

3 or 4 inches Sealed PVC or any other rigid pipe

Installation instructions

6720608782-09.1Av

6720608782-10.1Av

12"

6720608782-11.1Av

Min. 3 Feet

3” stainless steel pipe

Horizontal venting systems only:

An optional stainless concentric vent/air intake termination can be used to provide only one penetration point through the exterior wall (see Fig. 8, 9 & 10). The concentric vent/air intake kit can be ordered from your local wholesaler. (Part# ESHCK). Note: Vent piping and

terminal used with concentric vent/air intake kit must be from the same vent pipe manufacturer. The appliance can also be installed with separate air intake and exhaust piping (see Fig. 15

Fig. 8 Concentric kit part # ESHCK

3.3.2 Venting Specifications

Install appliance as close to point of vent termination as possible. The exhaust piping must vent directly to the outside of the structure. Horizontal sections of vent must pitch upward towards termination ¼" for every foot of horizontal length, to prevent the pooling of condensate, and be supported at 4 foot intervals with overhead hangers. Exception: horizontal run between last elbow and termination must pitch down to termination 1/4" per foot. Note: For horizontal terminations, venting must terminate once it penetrates to the outside of the structure. There must be no sections of vent pipe exposed to the outdoors other than the termination. Note: Listed thimbles or collars are necessary where venting passes through wall and ceiling partitions. If the vent system passes through combustible areas where the vent clearance requirements cannot be maintained, it is permissible to chase straight sections of sea led 3 inch single wall vent through 4 inch (or greater) T ype-B vent. The distance to combustibles using this chase technique is 1 inch 1). Note: Type-B vent must never be used as the actual exhaust vent system for the appliance, as it is not gas tight and illegal for use with this appliance. This will create a serious health hazard and void the warranty.

Fig. 9 Concentric kit vent assembly

3”

VENTING

3 or 4"

90° elbow

3”

Horizontal

Terminal

3” Vertical

Terminal

Z flex Protech Heat Fab

2SVEEWCF0390 FSELB9003 9314

2SVSTB03 FSTB3 9390 TEE

2SVSRCF03 FSRC3 5300CI

Table 3 Terminator Part Numbers

Fittings or Piping Equivalent

feet m

45 degree elbow 1.25 0.38

90 degree elbow 2.5 0.76

pipe per foot 1 0.30

Table 4 Friction Loss Equivalent in piping and fittings

For specific questions concerning vent material, specifications, usage or installation, please contact the vent manufacturer directly.

Company Contact info

Z-flex www.z-flex.com

800-654-5600

Fig. 10 Concentric kit installation

ProTech Industries www.protechinfo.com

800-766-3473

Heat-Fab www.heatfab.com

800-772-0739

Table 5 Vent manufacturers

6 720 608 542

Installation instructions

Condensate drain requirements

An external condensate drain (not supplied with the heater) must be installed under the following conditions:

• All vertical terminating vent installations.

• Horizontal terminating vent installations where the

total linear vent length is greater than 10 feet (3.1 m).

• Vent installations where any section of the exhaust

vent pipe passes through an unconditionedspace.

Twin pipe termination clearances

The minimum clearance between exhaust vent and combustion air inlet terminations for twin pipe penetration is 3 feet.

Minimum combustion air and exhaust pipe length

The minimum exhaust pipe length is 3 feet (1m) of straight vent pipe. The minimum combustion air pipe length is one 90° elbow.

Maximum combustion air and exhaust pipe length

The following table (Table 6) displays the maximum allowable straight pipe lengths for combustion air and exhaust piping with consideration to the number of elbows used.

Air intake or

Exhaust

system

0 N/A* 26 21 16 11

1 N/A* 23 18 13 8

2 23 20 15 10 5

# of 45°

elbows

3 20 17 12 7 N/A**

4 17 14 9 4 N/A**

5 14 11 6 N/A** N/A**

6 11 8 3 N/A** N/A**

0 1 2 3 4

Maximum allowable straight pipe length (ft)

# of 90° elbows

Table 6 Maximum allowable straight pipe length

* Not allowed. At least one 90º elbow required. ** Not allowed. Minimum of 3 feet (1m) of straight pipe required.

Note: 90° elbows used for terminations should not be counted in the exhaust and combustion air piping.

Step 1: Total the number of 90° elbows and 45°

elbows used on the exhaust piping.

Step 2: Use this value in the table to determine the

maximum straight exhaust pipe length allowed.

Step 3: Total the number of 90° elbows and 45°

elbows used on the combustion air piping.

Step 4: Use this value in the table to determine the

maximum straight combustion air pipe length allowed.

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Installation instructions

6720608836-23.1Av

Required direct vent terminal clearances (twin pipe / concentric penetration)

Fig. 11

Canadian installations

A Clearance above grade, veranda, porch, deck or balcony 12 in. 12 in.

B Clearance to window or door that may be opened 36 in. 12 in.

C Clearance to permanently closed window * *

D Vertical clearance to ventilated soffit located above the vent

terminator within a horizontal distance of 2 feet (61cm) from the center line of the terminator

E Clearance to unventilated soffit * *

F Clearance to outside corner * *

G Clearance to inside corner * *

H Clearance to each side of center line extended above meter/

regulator assembly

I Clearance to service regulator vent outlet 36 in. *

J Clearance to non-mechanical air supply inlet to building or the

combustion air inlet to any other application

K Clearance to mechanical air supply inlet 72 in. 36 in. above if within 10 feet

L Clearance above paved sidewalk or paved driveway located on

public property

M Clearance under veranda, porch deck or balcony 12 in.

36 in. within a height 15 feet above

meter/ regulator assembly

* *

36 in. 12 in.

84 in.

U.S. installations

horizontally

Table 7

1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code

2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code

3) A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

4) Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

* For clearances not specified in ANSI Z223.1 / NFPA 54 or CSA-B149.1, one of the following shall be indicated:

a) A minimum clearance value determined by testing in accordance with section 2.20, or; b) A reference to the following footnote: “Clearance in accordance with local installation codes and the requirements of the gas supplier.”

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Required other than direct vent terminal clearances (single pipe penetration)

6720608836-23.1Av

Installation instructions

Fig. 12

Canadian installations

A Clearance above grade, veranda, porch, deck or balcony 12 in. 12 in.

B Clearance to window or door that may be opened 36 in. 4 feet below or to side of opening;

C Clearance to permanently closed window * *

D Vertical clearance to ventilated soffit located above the vent

terminator within a horizontal distance of 2 feet (61cm) from the center line of the terminator

E Clearance to unventilated soffit * *

F Clearance to outside corner * *

G Clearance to inside corner * *

H Clearance to each side of center line extended above meter/

regulator assembly

I Clearance to service regulator vent outlet 36 in. *

J Clearance to non-mechanical air supply inlet to building or the

combustion air inlet to any other application

K Clearance to mechanical air supply inlet 72 in. 36 in. above if within 10 feet

L Clearance above paved sidewalk or paved driveway located on

public property

M Clearance under veranda, porch deck or balcony 12 in.

36 in. within a height 15 feet above

meter/ regulator assembly

* *

36 in. 4 feet below or to side of opening;

84 in.

U.S. installations

1 foot above opening

horizontally

84 in.

Table 8

1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code

2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code

3) A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

4) Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

* For clearances not specified in ANSI Z223.1 / NFPA 54 or CSA-B149.1, one of the following shall be indicated:

6 720 608 542

Installation instructions

6720608542-02.2AL

HORIZONTAL RUN

1/4" PERFOOT

DOWN TO

TERMINATOR.

CONDENSATE

DRAIN

12"

6720608782-11.1Av

Min. 3 Feet

3” stainless steel pipe

6720608542-05.2AL

26ft

FIRESTOP SUPPORT

ELBOW

APPLIANCE

HOSE CLAMP

RAINCAP

STORMCOLLAR

FLASHING

FIRESTOP SUPPORT

4"MIN.

AIRSPACE

6720608158-91.2Av

CONDENSATE

DRAIN

2'MIN.

10'MIN.

3'MIN.

3.3.3 Venting configuration examples

Below are approved examples of horizontal venting installations.

Fig. 13 Horizontal side wall venting installation (single

pipe penetration)*

* Warning: for non-freezing climates only! Important:

Note: Pitch horizontal runs down toward the heater, except horizontal run between last elbow and termination which must slope down to termination 1/4" per foot.

Note: For horizontal terminations, venting must terminate once it penetrates to the outside of the structure. There must be no sections of vent pipe exposed to the outdoors.

Fig. 15 Horizontal twin pipe penetration

Below are approved examples of vertical venting installations.

Important:

Note: Pitch horizontal runs down toward the heater, 1/4" per foot.

Fig. 14 Horizontal venting installation (concentric

penetration)

Fig. 16 Vertical venting installation (single pipe pene-

tration)*

* Warning: for non-freezing climates only!

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Installation instructions

CHIMNEY

MORTAR

HANGERSTRAP

HORIZONTAL RUN 1/4"RISE/FT

ELBOW

APPLIANCE

MAY BEINSULATED IFNECESSARY

6720608158-14.2AL

HOSE CLAMP

ELBOW

RAINCAP

STORMCOLLAR

SILICONESEAL

FLASHING

CONDENSATE

DRAIN

2'MIN.

10'MIN.

3'MIN.

3.3.4 Vent connections

B Attach the flue gas exhaust accessory (8 705 504

162) to the top of the unit (position 1) using the 4 screws and gasket provided. Fully insert stainless steel vent pipe 1.5” minimum into the accessory and tighten the clamp (position 2).

NOTE: Vent pipe must be completely vertical when inserting or gasket inside exhaust accessory can become displaced. Exhaust accessory can be removed with vent pipe attached to check gasket position.

Fig. 17 Vertical venting installation (twin pipe penetra-

tion)

Fig. 19

B Attach the combustion air inlet accessory (8 705

504 116) to the top of the unit (position 3) using the 3 screws and gasket provided, and install air intake pipe over the accessory. NOTE: The appliance has the option to mount the combustion air inlet accessory on the top right or on the top left side of the heater. The combustion air inlet that is not used must be kept sealed.

Fig. 18 Vertical venting installation - Masonry Chim-

6 720 608 542

ney (combustion air piping not shown)

Fig. 20

B Ensure that exhaust vent pipe is fully inserted in collar

to enable proper connection.

Exhaust venting must be 3" or 4" sealed single wall stainless steel (AL29-4C) vent pipe.

Installation instructions

RAIN CAP

STORM COLLAR

FLASHING

4" MIN.

AIR SPACE

CONDENSATE

APPLIANCE

6720608782-04.2Av

ELBOW

FIRESTOP SUPPORT

DRAIN TRAP TO DRAIN - DISPOSE

OF CONDENSATE ACCORDING TO LOCAL CODES

DRAIN TEE

2'MIN.

10'MIN.

3'MIN.

3.3.5 Condensate drain installation Note: Do not install condensate drain in areas where it

may freeze.

1. Install condensate drain as close to heater as possible.

2. Use 3/8" ID high temperature silicone tube to connect to condensate drain port. Do not use copper piping for any portion of the condensate drain.

3. Form a condensate trap by means of a 3" loop partially filled with water.

4. To increase the tube length, connect to end of the high temperature silicone tubing with vinyl tubing, PVC or CPVC pipe. Do not reduce the internal diameter at any point.

5. Dispose of condensate according to local codes.

Fig. 21 Condensate drain installation (combustion air

3" Venting Z-flex ProTech Heat Fab

90° Condensate Drain Tee

Horizontal Condensate Drain

Condensate Drain Tube

Table 9 Approved Condensate Drain Part Numbers

piping not shown)

2SVEVWCF03 FST3 &

2SVEDWCF03 FSHDT3 9321

2SVEDTK24 N/A 7000TUBE

93PPLSTEE

FSDF3

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Installation instructions

3.3.6 Fan speed adjustment

IMPORTANT! Installation adjustment:

After installing the water heater, the fan speed values for minimum power (P2) and maximum power (P1) may need adjustment due to variations in altitude and vent pipe length. Failure to make necessary adjustments to fan speed values may result in improper operation of the appliance.

First calculate the total equivalent vent length. Use this value to determine the appropriate fan speed values, found in Table 12 and make any necessary adjustments. After changing fan speed values proceed to Section 6.4 to confirm CO2 values are within specified ranges.

Total equivalent vent length calculation

B Determine the total length of all straight sections of

vent pipe and enter in table 10, line 1.

B Count the number of 90° elbows used and enter that

value in line 2. (Do not count terminals and first elbow used on intake and exhaust).

B Count the number of 45° elbows used and enter that

value in line 3.

B Repeat steps 1 through 3 for air intake pipe and enter

those values in the intake section of table 10.

B Add line 4 from Exhaust to line 4 of Intake and enter

result in line 5. This is the total equivalent vent length.

Example

Exhaust

• 7 - 3' straight sections

• 1 - 1' straight section = Total straight pipe length 22’

• 2 - 90° elbow.

Intake

• 5 - 3' straight sections =

Total straight pipe length 15’

• 1 - 90° elbows.

Example

Exhaust

Straight section length (feet)

90° elbows (qty) 1 x 2.5 = 2.5

45° elbows (qty) 0 x 1.25 = 0

Total: 24.5

Intake

Straight section length (feet)

90° elbows (qty) 1 x 2.5 = 0

45° elbows (qty) 0 x 1.25 = 0

22 x 1 = 22

15 x 1 = 15

Exhaust

Straight section length

__ x 1 =

____

(feet)

90° elbows (qty) __ x 2.5 =

45° elbows (qty) __ x 1.25 =

4 Total:

____

Intake

Straight section length __ x 1 =

90° elbows (qty) __ x 2.5 =

45° elbows (qty) __ x 1.25 =

Total equivalent vent length =

Total:

____

Table 10 Determining vent length combination (see

example in Table 11)

Total: 15

Total equivalent vent length = 39.5

Table 11 Determining vent length combination exam-

ple

Note: Do not count terminals and first elbow used on intake and exhaust.

Total equivalent length must not to exceed 57ft.

NOTE: If using concentric terminal include exhaust pipe length that is part of the concentric terminal.

6 720 608 542

Installation instructions

Natural Gas Liquid propane

Altitude

(above sea

level)

0 - 2000 ft

(0 - 610 m)

2000 - 4500 ft

(610 - 1372 m)

4500 - 8000 ft

(1372 - 2439 m)

* Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see section

Total

equivalent

vent length

5.5 - 32 ft

33 - 57 ft

5.5 - 32 ft 8* 48* 47*

33 - 57 ft 8* 49* 48*

5.5 - 32 ft 9* 49*

33 - 57 ft 9* 50* 49*

Minimum

power fan

speed (P2)

Maximum

power fan speed

(P1)

modification required

power fan speed

modification required

Maximum

(P1)

Table 12 Fan speed adjustment

1) Full equivalent length (inlet + outlet piping + fittings)

Adjusting minimum power fan speed (P2)

To select fan speed:

B Press ON/OFF button into OFF. B Press and hold "Program" button and press

ON/OFF button to turn appliance ON.

Adjusting maximum power fan speed (P1)

To select fan speed:

B Press ON/OFF button into OFF. B Press and hold "Program" button and press

ON/OFF button to turn appliance ON.

48*

6.4

For operation at elevations above 2,000 ft (610 m) the equipment ratings shall be

reduced at the rate of 4% for

each 1,000 ft (305 m) above sea

for instructions.

level

Fig. 22

B As soon as '188' is displayed, release "Program"

button , and the display should read P2.

B Press or to choose the fan speed suitable

with your installation, see Table 12.

B Press and hold (± 5 sec.) “Program” button until

the display flashes, then the selected value is memorized.

Fig. 23

B As soon as '188' is displayed, release "Program" but-

ton , and the display reads P2.

B Press the minus button to display P1. B Press “Program” button to enter P1 adjustment.

The current setting will appear on the display.

B Press or to choose the fan speed suitable

with your installation, see Table 12.

B Press and hold (± 5 sec.) “Program” button until

Do not set P2 to greater then 9.

the display flashes, then the selected value is memorized.

Proceed directly to Section 6.4 to confirm CO2 values are within range.

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