Bosch Uni 5000F US 207 User manual

C
– Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS
VDo not try to light any appliance.
VDo not touch any electrical switch; do not
use any phone in your building.
VImmediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
VIf you cannot reach your gas supplier, call
the fire department.
– Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
WARNING:
If the information in this manual is
not followed exactly, a fire or explo-
sion may result causing property
damage, personal injury or loss of
life.
Operating Instructions
Low-temperature oil and gas-fired boiler
Bosch Uni 5000F US/CA
171/207/256
6 720 648 033-00.1T
6 720 648 163- 2011/05 US/CA

2| Contents
6 720 648 163 (2011/05)
Contents
1 General safety instructions and explanation of
symbols 3
1.1 Explanation of symbols 3
1.2 Safety instructions 3
2 Product description 5
2.1 Intended use 5
2.2 Certification and testing mark 5
2.3 Disposal 5
2.4 Product description 5
3 Commissioning the heating system 6
3.1 Turning the heating system on 6
3.2 Checking the operating pressure, topping up
the boiler water and bleeding air from the
system 6
3.2.1 Checking the operating pressure 6
3.2.2 Topping up the boiler water and bleeding the
system 6
3.3 Starting up the system using the Aquastat 7
3.4 Turning the heating system off 7
3.5 Action in an emergency 7
3.6 Operating tips 8
3.7 Why is regular servicing important? 8
4 Troubleshooting 9
4.1 Identifying operating modes and resetting
faults 9

General safety instructions and explanation of symbols | 3
6 720 648 163 (2011/05)
1 General safety instructions and explanation of symbols
1.1 Explanation of symbols
Signal words are used to indicate the level of risk if
counter measures are not taken.
•Caution indicates that minor damage to property may
occur.
•Warning indicates that minor personal injury or
severe damage to property may occur.
•Danger means that severe personal injury may occur.
Very serious cases may result in death.
Notes contain important additional information.
Notes do not contain any warnings or information about
hazards or risks.
1.2 Safety instructions
If you smell gas
BTurn off the gas cock.
BOpen windows and doors.
BDo not operate any electrical switches or equipment
such as telephones, power plugs and doorbells.
BExtinguish all open flames.
BDo not smoke.
BDo not use lighters of any kind.
BWarn all ooccupants of the building, but do not ring
doorbells.
BIf you can actually hear gas escaping, leave the
building immediately. Prevent others from entering
and notify the police and fire department from
outside the building.
BFrom outside the building, call gas supplier and
approved heating contractor.
If you smell flue gas
BSwitch off the boiler (Æpage 7).
BOpen windows and doors.
BInform an authorized heating contractor.
Installation
BCorrect and proper installation and adjustment of the
burner and the controls are the fundamental
requirements for safe and economical operation of
the boiler.
BThe boiler may only be installed or converted by an
approved heating contractor.
BDo not modify any parts that carry flue gas.
BThe hot water tank may only be used for heating
domestic hot water.
BNever shut off safety valves!
Water must be able to escape from the safety valve for
the hot water system and piping when the water is
being heated.
Maintenance and servicing
Heating systems should be regularly maintained for the
following reasons:
Heating systems should be regularly maintained for the
following reasons:
•to maintain a high level of efficiency and to operate
the system economically (low fuel consumption),
Warnings are indicated by a warning
triangle and a grey background.
Notes are identified in the text by this
symbol. They are separated by horizontal
lines above and below the text.

4| General safety instructions and explanation of symbols
6 720 648 163 (2011/05)
•to achieve a high level of operational reliability,
•to maintain the cleanest combustion.
BRecommendation for users: sign a maintenance and
servicing contract with an approved heating
contractor covering annual servicing and
maintenance.
BThe flue system must be inspected once a year. Have
all parts that show any signs of damage from
corrosion or other causes replaced.
BThe boiler must be serviced by qualified boiler service
company once a year. Servicing must include the
burner, the entire flue and combustion air system and
any air inlet/outlet vents. All parts that show any signs
of damage from corrosion or other causes must be
replaced.
BServicing and repairs may only be carried out by a
trained heating contractor.
BHave any faults immediately corrected in order to
prevent damage to the system.
BThe operator is responsible for the general and
environmental safety of the heating system.
BUse only genuine Bosch spare parts. Damage caused
by the use of parts not supplied by Bosch is not
covered by the Bosch warranty.
Danger by failing to consider your own safety in an
emergency such as a fire
BNever put yourself at risk. Your own safety must
always take the highest priority.
Dangers posed by explosive and flammable materials
BAny work on components that carry oil or gas may only
be carried out by a certified heating contractor.
BDo not use or store flammable materials or liquids
(paper, thinners, paints, etc.) near the boiler.
BMaintain a clearance of at least 16 inches (40 cm)
from the boiler.
Risk of poisoning. Insufficient ventilation may cause
dangerous flue gas leaks.
BNever close off or reduce the size of air inlet or outlet
vents.
BThe boiler must not be operated until the obstruction
has been removed.
Risk of water damage
BDo not use the appliance if any part of it has been
under water.
BCall in a qualified customer service technician
immediately to check the appliance and replace any
controls that have been under water.
Combustion air
BKeep the combustion air free of corrosive substances
(e. g. halogenated hydrocarbons that contain chlorine
or fluorine compounds). In that way you will prevent
corrosion.
Instructing the operator
BThe operator must read the information on how the
boiler works and have the heating system installer
explain how to operate it.

Product description | 5
6 720 648 163 (2011/05)
2 Product description
To ensure safe, economical and environmentally friendly
use of the heating system, we recommend that you
carefully read the safety instructions and operating
instructions.
These instructions provide the operator of the heating
system with an overall view of the use and operation of
the boiler.
2.1 Intended use
The boiler is designed for heating central heating system
water and domestic hot water, in residential buildings or
apartment buildings, and light commercial installations.
Other uses are not intended.
2.2 Certification and testing mark
This appliance has been tested and certified to meet
rules and regulations in place for the US and Canadian
markets.
2.3 Disposal
BDispose of boiler packaging in an environmentally
responsible manner.
BAll heating system components that have to be
replaced should be disposed of in environmentally
responsible manner at an authorized disposal site.
2.4 Product description
The boiler (ÆFig. 1) is a low-temperature oil or gas-fired
appliance. Your heating contractor or installer has
equipped the boiler with an appproved burner.
The main components of the boiler (ÆFig. 1) are:
•Optional Control panel or aquastat
•Boiler jacket
•Boiler block with insulation
•Customized burner
The controls monitors the boiler and system water
temperatures and controls the burner. It also includes
the safety devices.
The boiler can alternatively be fitted with a simple
aquastat control.
The boiler jacket prevents heat loss and reduces noise.
The boiler block transfers the heat generated by the
burner to the heating water. The thermal insulation
reduces radiant and standby heat loss.
Fig. 1 Boiler without burner
1Burner door front panel
2Thermal Insulation
3Boiler block
4Boiler jacket
2
3
4
1
6 720 648 033-01.1T

6| Commissioning the heating system
6 720 648 163 (2011/05)
3 Commissioning the heating system
3.1 Turning the heating system on
Before switching on, ensure that:
•the operating water pressure is sufficient,
•the fuel supply has been turned on at the main shut-
off valve, and
•the heating system emergency shut-off switch is in
the ON position.
3.2 Checking the operating pressure,
topping up the boiler water and
bleeding air from the system
The water used for filling the heating system loses a
substantial amount of volume in the first few days due to
the release of its gas content. This causes air pockets to
form and the heating system starts to make noises.
BWith new heating systems, check the operating
pressure daily at first, topping up the boiler water and
bleeding the system and radiators (if so equipped).
BLater on, check the operating pressure monthly,
topping up boiler water and bleeding the boiler and
radiators (if so equipped).
3.2.1 Checking the operating pressure
Your heating contractor will have set the system to the
required operating pressure of at least 15 psi (1 bar) and
entered the setting in Tab. 1, page 7.
BRead the current operating pressure (psi/bar) and
temperature (°F/°C) from the temperature/pressure
gauge.
BIf the temperature/pressure gauge needle drops
below the minimum pressure marker of 15 psi (1 bar),
the operating pressure is too low. Top up the system
until the contractor's selected operating pressure is
reached.
Fig. 2 Pressure/temperature gauge
3.2.2 Topping up the boiler water and bleeding the
system
Ask your heating contractor to show you where the
boiler fill & drain valve for topping up the heating system
is located in your heating system.
BIf there the fill valve is not hard piped to the water
supply, you will need to connect a hose.
BFill the heating system by slowly opening the fill valve.
Observe the pressure gauge (pressure/temperature
gauge) while doing so.
BClose the boiler fill valve once the required operating
pressure has been reached.
BBleed the system via the air vent and the radiator
bleed valves (if so equipped).
BTop up with additional water if the pressure drops as
a result of bleeding the system.
7 747 010 720-24.2RS
CAUTION: Health risk from contaminated
domestic water.
BIt is imperative that you observe all
regulations and standards applicable in
your country regarding prevention of
domestic water contamination.
CAUTION: Risk of damage to system due to
temperature stress.
If you fill the heating system when it is hot,
the resulting temperature stress can cause
stress cracks and a leak in the boiler.
BOnly fill the heating system when cold
(the flow temperature should be no more
than 100 °F (30 °C)).
CAUTION: Risk of system damage due to
frequent topping up.
If you have to top up the heating water
frequently, the heating system may suffer
damage from corrosion or scaling due to
repeated introduction of oxygen.
BAsk your heating contractor if the local
water can be used untreated or whether
it needs to be treated.
BNotify your heating contractor if you find
you need to top up your heating system
frequently, as there may be a leak.

Commissioning the heating system | 7
6 720 648 163 (2011/05)
3.3 Starting up the system using the
Aquastat
BSwitch on emergency shut-off switch ("ON" position).
This turns on the heating system.
Fig. 3 Switching the heating system on/off using the
emergency shut-off switch (without external
controls)
3.4 Turning the heating system off
BSwitch off the emergency shut-off switch ("OFF"
position). This switches off the boiler and all its
components.
Completing final operations
BShut off fuel supply by closing main valve.
3.5 Action in an emergency
In the event of an emergency, e. g. a fire, proceed as
follows:
BNever put yourself at risk of fatal injury. Your own
safety must always take the highest priority.
BShut off fuel supply by closing main valve.
BIsolate the heating system from the mains power
supply by means of the heating system emergency
stop switch or the appropriate electrical fuse/circuit
breaker.
Operating pressure
Design operating pressure
(optimum setting) _____________ psi (bar)
Maximum heating system
operating pressure
(standard = 30 psi (2 bar)) _____________ psi (bar)
Table 1 Operating pressure (entered by system installer)
7 747 019 141-35.1RS
CAUTION: Risk of system damage from
freezing.
If the heating system has been switched off,
it may freeze up.
BLeave the heating system permanently
switched on as much as possible.
BProtect your heating system against
freezing by draining the heating system
and hot water pipes at the lowest point.
Use the heating system emergency shutoff
switch located outside the boiler room or
the heating system circuit-breaker for
emergency shutdown.

8| Commissioning the heating system
6 720 648 163 (2011/05)
3.6 Operating tips
The right fuel
To ensure it operates properly, the heating system
requires fuel of the correct type and grade.
Information on the boiler room
3.7 Why is regular servicing important?
Heating systems should be regularly maintained for the
following reasons:
•to achieve a high level of efficiency,
•to operate the system economically (low fuel
consumption),
•to maintain the cleanest possible combustion.
CAUTION: Risk of system damage from use
of incorrect fuel.
BOnly use the fuel specified. The correct
fuel is entered in Tab. 2 by the heating
system installer.
Use only this fuel
__________________________
____________________________________________ Stamp/
Date/Signature
Table 2 Fuel to be used (entered by heating system
installer)
CAUTION: Risk of boiler damage from
contaminated combustion air.
BKeep the combustion air free of corrosive
substances (e.g. halogenated
hydrocarbons that contain chlorine or
fluorine compounds).
BPrevent heavy accumulation of dust.
CAUTION: Risk of system damage from
water.
BIn the event of severe risk of flooding,
disconnect the boiler from its power
supply and shut off the fuel supply before
water enters the boiler room.
BAfter the flood has subsided, ask your
installer to check the heating system
before starting it up again.
BAll parts that have been in contact with
flood water must be replaced by a
qualified heating contractor.
CAUTION: Risk of system damage due to
lack of or inadequate cleaning and
maintenance.
BHave your heating system inspected,
cleaned and maintained by a heating
contractor once a year.
BWe recommend you sign a contract
covering an annual inspection and
maintenance on an as-required basis.

Troubleshooting | 9
6 720 648 163 (2011/05)
4 Troubleshooting
4.1 Identifying operating modes and
resetting faults
Two types of fault are distinguished:
•Burner faults and
•Control and heating system faults
If there is a burner fault the fault indicator lamp on the
burner comes on (Æburner documentation). Such faults
can generally be reset by pressing the reset button on
the burner.
Control and heating system faults are indicated on the
control unit display if it has one. More detailed
information can be found in the controls'
documentation.
Fig. 4 Resetting the burner
1Burner
Correcting burner faults
BPress reset button on burner.
6 720 648 033-02.1T
1
CAUTION: Risk of system damage due to
too many resets. Always follow the
burner manufacturer's instructions.
Too many resets can damage the bur-
ner's ignition transformer.
BDo not press the reset button more
than three times in a row. If the fault
does not reset after the third attempt,
localize and rectify the fault with the
help of the burner documentation.
Notify a service contractor if
necessary.
CAUTION: Risk of system damage from
freezing.
The heating system can freeze up in cold
weather if it has been switched off or
disabled by a fault shutdown.
BRectify the fault immediately and
restart the heating system.
BIf that is not possible, protect the
heating system against freezing by
draining it at the lowest point.
Canadian installations of this boiler are
required to be equipped with a blocked vent
switch (WMO) that interrupts the burner in
case of an obstructed flue gas pipe. Call
your boiler service technician if you suspect
the WMO may have tripped.

10 |
6 720 648 163 (2011/05)
Notes

| 11
6 720 648 163 (2011/05)
Notes

United States and Canada
Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 0 05
Tel. [phone]
Fax [phone]
www.bosch-climate.us
U.S.A.
Products manufactured by
Bosch Thermotechnik GmbH
Junkersstrasse 20-24
D-7 249 Wernau
www.bosch-thermotechnology.com
Bosch Thermotechnology Corp. reserves the right
to make changes without notice due to continuing
engineering and technological advances.