Bosch Singular Installer Pocket Guide by Bosch Home Comfort

Bosch Singular Installer Pocket Guide

Table of Contents

Product Brochure Scan QR to view

Display Function

Technical Specifications

First Level Service Codes

Maximum Vent Length Chart

Commissioning: Maximum / Minimum Settings

Error Codes

LP Gas Recommissioning Adjustments

Outdoor Reset Setup

Accessories & Spare Parts

Notes

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Display Function

I H

C D

Description n Descriptio

Key

Digital display Displays water temperature, error codes, etc.

Space heating mode Indicates space heating set point/ system temperature.

Mode Changes the mode.

DHW mode Indicates DHW set point.

UP Increases the temperature.

Pressure Indicates the pressure in the boiler.

Down Decreases the temperature.

RPM Indicates fan revolutions per minute (RPM).

Freeze protection mode Indicates freeze protection mode operation.

Outdoor reset mode Indicates temperature sensor connected.

Combustion Indicates gas burner operation.

Error Indicates error.

Icon

Description Description

Key

Power

Bosch Singular Boilers Installer Pocket Guide

Technical Specifications Application

Space Heating + DHW

Models

Singular 4000 Singular 5200

Part #

7-738-007-219 7-738-007-220

Performance Specifications NG/LP

NG/LP

Input Maximum DHW (MBH)

155

199

Input Maximum Heating (MBH)

140

Input Minimum (MBH)

19.9

DOE Heating Capacity (MBH)

128

Net I =B=R (MBH)

111

AFUE

95.00%

DHW Flow Max (ΔT at 67°F)

4.0 GPM

5.2 GPM

Fuel

Technical Data Weight (Without Packaging) Dimensions (WxHxD) Minimum Recommended Pipe Size Supply Tappings

78 Lbs. 18.1" x 27.6" x 11.6" 1" 1" NPT

Return Tappings

1" NPT

Domestic Cold Water Supply

3/4" NPT

Domestic Hot Water Supply

3/4" NPT

Gas Connection Size

3/4" NPT

Vent Size Vent Material Combustion Air Size Maximum Installation Elevation Gas Pressure Minimum w.c.

2" - 3" PVC, CPVC, PP 2" - 3" 4,500' NG 3.5" / LP 8"

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First Level Service Codes  Press the “Mode” and “-” to view first level service codes

Press & hold MODE + •••••

Display

Description

1st error to occur

2nd error to happen after the 1st error

current error boiler is detecting

Boiler pressure

Current fan speed

Fan voltage

Flue gas temperature

Current DHW temperature

Ambient temperature

Current system return temperature

Operating mode

Software version

Note: H1 and H2 will be the same error if error occurs while boiler is operating

Bosch Singular Boilers Installer Pocket Guide

Maximum Vent Lengths Max. Vent Length Including Elbows in Ft. # of 90° elbows

2" Pipe

3" Pipe

145

140

135

130

125

120

N/A

115

N/A

110

137

132

127

122

117

112

N/A

107

N/A

102

Separate Terminations

Concentric Termination

Dip Switch

FLUE LENGTH

DIP S/W #3

DIP S/W #4

2” PVC

3” PVC

OFF

Up to 15'

Up to 150'

OFF

Up to 30'

OFF

Up to 45'

Up to 60'

N/A

Note: Reference chart in manual for approved venting material.

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Commissioning Output Settings Gas Type

Maximum Output

Minimum Output

CO2

9.5%

9.9%

LP/Propane

9.5%

11.5%

Set screw for adjusting CO2 at minimum and maximum output

Dip Switch

Example Minimum heat capacity operation Dip S/W #6 On

DIP S/W #6

DIP S/W #7

Minimum heat capacity operation

Maximum heat capacity operation

ON: Minimum operation

ON: Maximum operation

OFF: Normal operation

OFF: Normal Operation

Note: Fully open several hot water fixtures and if the CO2 value at low fire is not

within 0.5% of the value listed in the table above, the gas valve set screw will need to be adjusted. Locate the set screw, then using a T15 torx turn the set screw a 1/4 turn at a time. Clockwise to raise or counterclockwise to lower the CO2 value. Fully open several hot water fixtures and if the CO2 value at high fire is not within 0.5% of the value listed in the table above, do not adjust the gas valve set screw and check if the gas orifice is properly installed.

Bosch Singular Boilers Installer Pocket Guide

Error Codes Display

Description

Solution

Abnormal operation: FAN

1. Clean the intake air screen 2. Check the fan connector 3. Check voltage -Red to Black: 0-45V -Yellow to Black: 0-13V

Abnormal operation: Pump

1. Check that air is bled from the pump 2. Check pump is running and is not stuck 3. Check the Pressure sensor

Overheating of heat exchanger

1. Check that water is flowing through the boiler and the pump is working 2. Check both high limit sensors T2 will trip in 302°F ( heat exchanger) and T3 will trip at 203°F(Supply Piping) 3. Turn off the system to let it cool down, and then restart the boiler

Low water pressure

1. Check all air is purged from the boiler 2. Check water pressure is ≥ 4.4 PSI

Ignition error

1. Ensure that the main gas supply valve is open 2. Check that gas valve is operating White - White(DC 105-135V) 3. Check igniter wires Brown - Brown (AC 105-135V)

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Display

Description

Solution

Abnormal operation: gas valve relay "open"

1. Occurs when the gas valve relay which is mounted on PCB is stuck open 2. Will need to replace the control board

Abnormal operation: flame detection

1. Check that gas valve is closed 2. Check that flame rod is not touching burner

Overheating

1. The heating supply sensor is reading greater than 208°F 2. Check that water is flowing through the boiler 3.Check resistance reading of the sensor to make sure it is working correctly

Abnormal operation: Heating Supply Sensor

1. This will occur if the heating supply sensor becomes disconnected while the boiler is running 2. Check that connections are secure at the control board and at the sensor

Abnormal operation: DHW temperature sensor

1. Check DHW sensor and confirm it is connected 2. Check resistance of the sensor. OL will indicate bad sensor

Bosch Singular Boilers Installer Pocket Guide

Error Codes Continued Display

Description

Solution

Clog of condensate trap

1. Clear clog in condensate trap

Blockage of flue pipe

1. Clean the vent terminal 2. Check resistance on the air pressure switch. OL indicates bad switch

Abnormal operation: Outdoor Temperature Sensor

1. Check the outdoor temperature sensor wiring connection 2. Confirm resistance is reading correctly from sensor

Abnormal operation: Exhaust Gas Temperature Sensor

1. Check the exhaust temperature sensor wiring connection 2. Confirm resistance is reading correctly from sensor

Abnormal operation: Exhaust temperature overheating

1. Exhaust Gas Temp Sensor reading above 149°F when Dip switch 1 is off 2. Limit will increase when dip switch 1 is on

Abnormal operation: Heating Return Sensor

1. Return water greater than 200°F, make sure system is piped correctly 2. Heating return sensor malfunctioning

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Display

Description

Solution

Abnormal operation: Pressure sensor

1. Check that voltage to the sensor is reading 5 V DC

Abnormal operation: gas valve relay "Close"

1. Occurs when the gas valve relay which is mounted on the control board is stuck closed 2. Control board will need to be replaced

Overheating of DHW temperature sensor

1. DHW sensor reading temperature above 140°F 2. Check that Supply Temp sensor is reading correctly

Abnormal operation: Data Communication

1. Touch pad will need to be replaced

Abnormal operation eep-rom error

1. Control board error, will need to be replaced

Bosch Singular Boilers Installer Pocket Guide

LP Gas Recommissioning Adjustments INFORMATION REGARDING THE CONVERSION OF THE BOSCH SINGULAR BOILERS FROM NATURAL GAS TO LIQUID PROPANE FLUE GAS ANALYZER MUST BE USED: 

The range of Bosch Singular Boilers are supplied in ready to use on Natural Gas (NG). If the installation requires Liquid Propane (LP) as the fuel then the boiler will have to be converted. The information regarding how to convert the boiler from NG to LP is contained within the installation manual, but as a summary, the process is as follows. There is an orifice supplied with the boiler that needs to be installed. Once this has been installed the boiler MUST be re-commissioned with a flue gas combustion analyzer. If the contractor/ Silencer commissioning engineer does not have a calibrated flue gas combustion analyzer on site then the boiler MUST NOT be used, until it has been re-commissioned to the required parameters stated in the Bosch Singular installation manual.

Note: Seal packing must be removed when converting to LPG

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Packing e Gas connector

Note: Replace the NG Orifice (Pictured Left) with the LP Orifice (Pictured Right)

Gas Type NG LP/Propane

Maximum Nominal Output

Minimum Nominal Output

CO2

9.5% 9.5%

9.9% 11.5%

The boiler commissioning process for NG and LP can be found in the Bosch Singular installation manual. Note: To commission any of the Bosch Singular range, a flue gas analyzer must be used whether the fuel is NG or LP.

Bosch Singular Boilers Installer Pocket Guide

Outdoor Reset Setup  Turn off the display by pressing the power button  Switch Dip switch 2 On

 Press the “Mode” and “+” buttons for 5 seconds

Press & hold MODE +

Indicator on the display will light up when you exit the set up menu.

5 Seconds  C7 will be displayed on the screen. Use the + button to change C7 to ON. Note: On - Boiler will operate on outdoor reset curve Off - Boiler will operate according to water temperature set point.

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 Press the MODE button to move to C8 then using the + or - button select the heat load value based on the chart below.

Heat Load

Minimum Set-Point

Maximum Set-point

Finned Tube Heat Load

118°F

180°F

Fan coil

120°F

180°F

Baseboard

100°F

170°F

Low Mass Radiant

82°F

140°F

High Mass Radiant

82°F

122°F

Radiator

118°F

170°F

Custom

Value

User defined

 Switch Dip switch 2 Off to save programming.

Outdoor Reset Menu Selection

Display

Description

Outdoor reset mode

Heat load value

Min space heating temperature

Max space heating temperature

Min outdoor temperature

Max outdoor temperature

Outdoor Temp. Min - Max Min Outdoor Temp.: 14°F Max Outdoor Temp.: 68°F

Bosch Singular Boilers Installer Pocket Guide

Accessories & Spare Parts Scan QR for complete spare parts list with exploded diagram

Accessories Description

Part Number

Singular Manifold

7738007396

Bosch Protection Pack

7738007397

Outdoor Temperature Sensor

7738007304

Spare Part Kits Description

Part Number

Technicians Parts Kit

7738007411

Contractor Parts Kit

7738007412

Distributor Parts Kit

7738007413

Sensors Description

Part Number

Switch, Air pressure (5200)

7738007247

Switch, Air pressure (4000)

7738007246

Exhaust Gas Temp Sensor

7738007268

Heating Supply Sensor Heating Return Sensor

7738007277

DHW Sensor

7738007295

Gas Valve

7738007270

High Limit Sensor HEX T2 (302°F)

7738007253

High Limit Sensor Supply T3 (203°F)

7738007275

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Notes Display

Description

Elimination

Bosch Singular Boilers Installer Pocket Guide

Notes Display

Description

Elimination

Grow Your Business With Bosch

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At Bosch Home Comfort, we are committed to supporting our installers by providing tools to manage and grow your business, allowing you to focus on what matters; providing your customers with comfort they can count on. By choosing Bosch, you represent one of the largest HVAC brands in the market with over 100 years of industry expertise. Join our team of Professional dealers to gain access to rewards, exclusive sales and marketing tools, technical support, and more. New Digital Platform

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