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
6 720 608 542 (2009/03) US
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.
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
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 |
2.5Dimensions 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 |
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|
|
4 |
Electrical connections |
28 |
4.1 |
Electrical power supply |
28 |
4.2 |
Position of the fuses in control unit |
28 |
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|
|
5 |
Operation instructions |
29 |
5.1 |
LCD Display functions |
29 |
5.2For your safety read before operating
|
your water heater |
30 |
5.3 |
Power |
30 |
5.4 |
Temperature selection |
30 |
5.5Use 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 |
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 |
7.2Burner 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 |
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|
|
8 |
Problem solving |
41 |
8.1 |
Error code diagnostics |
41 |
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|
9 |
Electrical diagram |
45 |
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10 |
Sensor resistance charts |
46 |
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|
11 |
GWH 2700 ES Functional scheme |
48 |
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12 |
Interior components diagram |
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and parts list |
49 |
12.1 |
Interior components |
49 |
12.2 |
Components diagram |
51 |
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13 |
Protecting the environment |
57 |
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14 |
Limited Warranty |
58 |
2 |
6 720 608 542 |
Warning
1Warning
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: 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: 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: 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.
6 720 608 542 |
3 |
Appliance details
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.
BAlways 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.
D A N G E R
HOT
BURN
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
Fig. 1
2Appliance details
2.1Features
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).
BOSCH is constantly improving its
iproducts, 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.
4 |
6 720 608 542 |
Appliance details
2.2Specifications (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.
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 (Nanograms of NOx (calculated as NO2) per Joule of heat output).
•CO ≤ 250 ppm (measured)
•CO2 level set from factory, see chapter 6.4.
Dimensions
•Depth (in): 11¼” (286 mm)
•Width (in): 17 7/8” (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 Bosch thermotechnology corp. for conversion instructions.
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 protection
IP X4 (protection against water drops)
If appliance is installed at elevations above
i2000ft, refer to section 3.3.6 Fan speed adjustment.
6 720 608 542 |
5 |
Appliance details
2.3Unpacking 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.
To remove front cover
B Loosen the two Philips head screws located on bottom rear of cover (see Fig. 3).
Fig. 2 Rating plate
A Serial number
BType of gas
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. 3 Loosen the two screws
B Lift front cover panel upward and remove.
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
6 |
6 720 608 542 |
Appliance details
2.4General rules to follow for safe operation
B1. 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.
B2. 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.
B3. 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 3.3 (page 9). If the 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 3.5 (page 21) and 3.4
(page 20).
B4. You must vent your heater. See chapter 3.3 on VENTING.
B5. 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).
B6. Keep water heater area clear and free from combustibles and flammable liquids. Do not locate the heater over any material which might burn.
B7. 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.
B8. 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.
B9. 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.
B 10. Failure to install heater correctly may lead to unsafe operation and void the warranty.
6 720 608 542 |
7 |
Appliance details
2.5Dimensions and Minimum installation clearances
2 ¾"
30 ½"
1 5
2 |
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+ |
6 |
P |
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r e s e t |
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3 |
7 |
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4 |
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5 ¼"
Fig. 6 Dimensions
1 On/Off button
2 Reset button
3Program key
4 Power ON or stand-by LED
5 LCD display
6Up button
7Down button
|
"16 |
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65 |
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"16 |
6 ½" 4 1 16" 5 ¼" |
52 |
21 16" |
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11 ¼" |
17 7 8 " |
5 ¼" |
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6720608158-04.2AL |
|
Model GWH 2700 ES |
TOP (A) |
12” |
FRONT (B) |
1” |
BACK |
0” |
SIDES |
1” |
FLOOR (C) |
12” |
Table 1 Minimum clearances
Fig. 7 Minimum clearances
Note: For servicing access, a 2ft clearance to front cover is recommended.
8 |
6 720 608 542 |
Installation instructions
3Installation instructions
3.1Tools 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.
3.2Introduction
Please follow these instructions. Failure to follow instructions may result in:
BDamage or injury.
BImproper operation.
BLoss 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 deter-
imine the venting/intake system layout and penetration and then work back to the heater.
3.3Venting
Warning: Do not reduce the vent (exhaust and combustion) pipe sizes and do not common vent with any other vented appliance or stove.
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.
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.
3.3.1Vent material
Establish vent clearances that comply with the vent manufacturer's specifications. In all cases, follow local codes. See Table 2.
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Diam. |
Material |
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Exhaust |
3 or 4 inches |
Sealed single wall stainless steel |
Vent |
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(AL29-4C) |
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Intake |
3 or 4 inches |
Sealed PVC or any other rigid pipe |
Vent |
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Table 2 Venting Specifications
6 720 608 542 |
9 |
Installation instructions
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 ).
6720608782-09.1Av
Fig. 8 Concentric kit part # ESHCK
6720608782-10.1Av
Fig. 9 Concentric kit vent assembly
12"
Min. 3 Feet
3” stainless steel pipe
6720608782-11.1Av
Fig. 10 Concentric kit installation
3.3.2Venting 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.
3” |
Z flex |
Protech |
Heat Fab |
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VENTING |
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3 or 4" |
2SVEEWCF0390 |
FSELB9003 |
9314 |
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90° elbow |
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3” |
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Horizontal |
2SVSTB03 |
FSTB3 |
9390 TEE |
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Terminal |
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3” Vertical |
2SVSRCF03 |
FSRC3 |
5300CI |
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Terminal |
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Table 3 Terminator Part Numbers |
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Fittings or Piping |
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Equivalent |
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feet |
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m |
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45 degree elbow |
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1.25 |
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0.38 |
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90 degree elbow |
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2.5 |
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0.76 |
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pipe per foot |
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1 |
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0.30 |
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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 |
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Z-flex |
www.z-flex.com |
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800-654-5600 |
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ProTech Industries |
www.protechinfo.com |
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800-766-3473 |
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Heat-Fab |
www.heatfab.com |
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800-772-0739 |
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Table 5 Vent manufacturers
10 |
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.
Note: 90° elbows used for terminations
ishould 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.
Air intake or |
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# of 90° elbows |
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Exhaust |
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system |
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0 |
1 |
2 |
3 |
4 |
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0 |
N/A* |
26 |
21 |
16 |
11 |
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1 |
N/A* |
23 |
18 |
13 |
8 |
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2 |
23 |
20 |
15 |
10 |
5 |
# of 45° |
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3 |
20 |
17 |
12 |
7 |
N/A** |
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elbows |
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4 |
17 |
14 |
9 |
4 |
N/A** |
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5 |
14 |
11 |
6 |
N/A** |
N/A** |
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6 |
11 |
8 |
3 |
N/A** |
N/A** |
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Maximum allowable straight pipe length (ft)
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.
6 720 608 542 |
11 |
Installation instructions
Required direct vent terminal clearances (twin pipe / concentric penetration)
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Fig. 11 |
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6720608836-23.1Av |
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Canadian installations1) |
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U.S. installations2) |
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A |
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Clearance above grade, veranda, porch, deck or balcony |
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12 in. |
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12 in. |
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B |
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Clearance to window or door that may be opened |
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36 in. |
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12 in. |
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C |
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Clearance to permanently closed window |
* |
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* |
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D |
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Vertical clearance to ventilated soffit located above the vent |
* |
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* |
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terminator within a horizontal distance of 2 feet (61cm) from the |
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center line of the terminator |
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E |
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Clearance to unventilated soffit |
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F |
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Clearance to outside corner |
* |
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* |
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G |
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Clearance to inside corner |
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* |
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H |
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Clearance to each side of center line extended above meter/ |
36 in. within a height 15 feet above |
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* |
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regulator assembly |
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meter/ regulator assembly |
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I |
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Clearance to service regulator vent outlet |
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36 in. |
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* |
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J |
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Clearance to non-mechanical air supply inlet to building or the |
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36 in. |
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12 in. |
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combustion air inlet to any other application |
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K |
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Clearance to mechanical air supply inlet |
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72 in. |
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36 in. above if within 10 feet |
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horizontally |
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L |
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Clearance above paved sidewalk or paved driveway located on |
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84 in. 3) |
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* |
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public property |
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M |
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Clearance under veranda, porch deck or balcony |
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12 in. 4) |
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* |
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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.”
12 |
6 720 608 542 |
Installation instructions
Required other than direct vent terminal clearances (single pipe penetration)
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Fig. 12 |
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6720608836-23.1Av |
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Canadian installations1) |
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U.S. installations2) |
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A |
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Clearance above grade, veranda, porch, deck or balcony |
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12 in. |
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12 in. |
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B |
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Clearance to window or door that may be opened |
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36 in. |
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4 feet below or to side of opening; |
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1 foot above opening |
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C |
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Clearance to permanently closed window |
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D |
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Vertical clearance to ventilated soffit located above the vent |
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terminator within a horizontal distance of 2 feet (61cm) from the |
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center line of the terminator |
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E |
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Clearance to unventilated soffit |
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F |
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Clearance to outside corner |
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G |
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Clearance to inside corner |
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H |
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Clearance to each side of center line extended above meter/ |
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36 in. within a height 15 feet above |
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regulator assembly |
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meter/ regulator assembly |
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I |
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Clearance to service regulator vent outlet |
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36 in. |
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J |
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Clearance to non-mechanical air supply inlet to building or the |
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36 in. |
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4 feet below or to side of opening; |
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combustion air inlet to any other application |
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1 foot above opening |
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K |
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Clearance to mechanical air supply inlet |
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72 in. |
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36 in. above if within 10 feet |
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horizontally |
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L |
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Clearance above paved sidewalk or paved driveway located on |
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84 in. 3) |
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84 in. |
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public property |
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M |
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Clearance under veranda, porch deck or balcony |
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12 in. 4) |
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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:
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.”
6 720 608 542 |
13 |
Installation instructions
3.3.3Venting configuration examples
Below are approved examples of horizontal venting installations.
4"
HORIZONTAL RUN |
1/4" PER FOOT |
DOWN TO |
TERMINATOR. |
CONDENSATE
DRAIN
6720608542-02.2AL
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.
12"
Min. 3 Feet
3” stainless steel pipe
6720608782-11.1Av
Fig. 14 Horizontal venting installation (concentric penetration)
26ft
6720608542-05.2AL
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.
10' MIN. |
RAIN CAP |
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2' MIN. |
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3' MIN. |
STORM COLLAR |
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FLASHING |
FIRESTOP SUPPORT |
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4" MIN. |
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AIR SPACE |
FIRESTOP SUPPORT
HOSE
CLAMP
ELBOW
CONDENSATE
DRAIN
APPLIANCE
6720608158-91.2Av
Fig. 16 Vertical venting installation (single pipe penetration)*
* Warning: for non-freezing climates only!
14 |
6 720 608 542 |
Installation instructions
Fig. 17 Vertical venting installation (twin pipe penetration)
RAIN CAP
10' MIN. |
STORM COLLAR |
2' MIN. |
FLASHING |
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3' MIN. |
SILICONE SEAL |
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CHIMNEY |
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MAY BE INSULATED |
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IF NECESSARY |
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HORIZONTAL RUN |
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1/4" RISE/FT |
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HANGER STRAP |
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MORTAR |
ELBOW |
ELBOW |
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HOSE |
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CLAMP |
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CONDENSATE |
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DRAIN |
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APPLIANCE |
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6720608158-14.2AL |
Fig. 18 Vertical venting installation - Masonry Chimney (combustion air piping not shown)
3.3.4Vent connections
BAttach 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 ver-
itical when inserting or gasket inside exhaust accessory can become displaced. Exhaust accessory can be removed with vent pipe attached to check gasket position.
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. 20
BEnsure that exhaust vent pipe is fully inserted in collar to enable proper connection.
Exhaust venting must be 3" or 4" sealed
isingle wall stainless steel (AL29-4C) vent pipe.
6 720 608 542 |
15 |
Installation instructions
3.3.5Condensate 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.
RAIN CAP
10' MIN. 2' MIN.
3' MIN. |
STORM COLLAR |
|
FIRESTOP SUPPORT
ELBOW
DRAIN TRAP
TO DRAIN - DISPOSE OF CONDENSATE ACCORDING TO LOCAL CODES
FLASHING |
4" MIN. |
AIR SPACE |
CONDENSATE |
DRAIN TEE |
APPLIANCE
6720608782-04.2Av
Fig. 21 Condensate drain installation (combustion air piping not shown)
3" Venting |
Z-flex |
ProTech |
Heat Fab |
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90° |
2SVEVWCF03 |
FST3 & |
93PPLSTEE |
Condensate |
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FSDF3 |
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Drain Tee |
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Horizontal |
2SVEDWCF03 |
FSHDT3 |
9321 |
Condensate |
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Drain |
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Condensate |
2SVEDTK24 |
N/A |
7000TUBE |
Drain Tube |
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Table 9 Approved Condensate Drain Part Numbers
16 |
6 720 608 542 |
Installation instructions
3.3.6Fan 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
BDetermine the total length of all straight sections of vent pipe and enter in table 10, line 1.
BCount 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).
BCount the number of 45° elbows used and enter that value in line 3.
BRepeat steps 1 through 3 for air intake pipe and enter those values in the intake section of table 10.
BAdd line 4 from Exhaust to line 4 of Intake and enter result in line 5.
This is the total equivalent vent length.
Exhaust
1 |
Straight section length |
__ x 1 = |
____ |
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(feet) |
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2 |
90° elbows (qty) |
__ x 2.5 = |
____ |
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3 |
45° elbows (qty) |
__ x 1.25 = |
____ |
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4 |
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Total: |
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Intake |
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1 |
Straight section length |
__ x 1 |
= |
____ |
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2 |
90° elbows (qty) |
__ x 2.5 |
= |
____ |
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3 |
45° elbows (qty) |
__ x 1.25 |
= |
____ |
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4 |
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Total: |
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5 |
Total equivalent vent length = |
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Table 10 Determining vent length combination (see example in Table 11)
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 |
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Exhaust |
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Straight section length |
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22 x 1 = |
22 |
(feet) |
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90° elbows (qty) |
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1 x 2.5 = |
2.5 |
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45° elbows (qty) |
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0 x 1.25 = |
0 |
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Total: |
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24.5 |
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Intake |
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Straight section length |
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15 x 1 = |
15 |
(feet) |
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90° elbows (qty) |
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1 x 2.5 = |
0 |
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45° elbows (qty) |
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0 x 1.25 = |
0 |
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Total: |
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15 |
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Total equivalent vent length = |
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39.5 |
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Table 11 Determining vent length combination example
Note: Do not count terminals and first elbow used on intake and exhaust.
Total equivalent length must not to
iexceed 57ft.
NOTE: If using concentric terminal include
iexhaust pipe length that is part of the concentric terminal.
6 720 608 542 |
17 |
Installation instructions
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Natural Gas |
Liquid propane |
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Altitude |
Total |
Minimum |
Maximum |
Maximum |
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(above sea |
equivalent |
power fan |
power fan speed |
power fan speed |
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level) |
vent length1) |
speed (P2) |
(P1) |
(P1) |
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0 - 2000 ft |
5.5 - 32 ft |
7 |
No |
No |
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(0 - 610 m) |
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modification required |
modification required |
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33 - 57 ft |
8 |
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For operation at elevations |
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5.5 - 32 ft |
8* |
48* |
47* |
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2000 - 4500 ft |
above 2,000 ft (610 m) the |
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equipment ratings shall be |
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(610 - 1372 m) |
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reduced at the rate of 4% for |
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33 - 57 ft |
8* |
49* |
48* |
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each 1,000 ft (305 m) above sea |
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level |
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4500 - 8000 ft |
5.5 - 32 ft |
9* |
49* |
48* |
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(1372 - 2439 m) |
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33 - 57 ft |
9* |
50* |
49* |
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* Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see section 6.4 for instructions.
Table 12 Fan speed adjustment
1)Full equivalent length (inlet + outlet piping + fittings)
Adjusting minimum power fan speed (P2)
To select fan speed:
BPress ON/OFF button into OFF.
BPress and hold "Program" button and press ON/OFF button to turn appliance ON.
Adjusting maximum power fan speed (P1)
To select fan speed:
BPress ON/OFF button into OFF.
BPress and hold "Program" button and press ON/OFF button to turn appliance ON.
Fig. 22
B As soon as '188' is displayed, release "Program" button , and the display should read P2.
BPress or to choose the fan speed suitable with your installation, see Table 12.
BPress and hold (± 5 sec.) “Program” button until the display flashes, then the selected value is memorized.
Do not set P2 to greater then 9.
i
Fig. 23
BAs soon as '188' is displayed, release "Program" button , and the display reads P2.
BPress the minus button to display P1.
BPress “Program” button to enter P1 adjustment. The current setting will appear on the display.
BPress or to choose the fan speed suitable with your installation, see Table 12.
BPress and hold (± 5 sec.) “Program” button until the display flashes, then the selected value is memorized.
Proceed directly to Section 6.4 to confirm
iCO2 values are within range.
18 |
6 720 608 542 |