Bryan Boilers Electric Water Boilers Installation, Operation & Service Manual Download Page 17 | Manualshive

Page: 17 / 17

Bryan Boilers Electric Water Boilers Installation, Operation & Service Manual Download Page 17

To start an idle boiler after wet lay-up, use the

following procedure:

1.

the boiler was pressurized with
nitrogen, disconnect the nitrogen supply
source and vent the boiler.2. Using the
lowdown valve, drain the boiler
partially and make up with feedwater so
as to dilute the chemical residuals to
operating concentration levels.

3.

After the boiler water concentrations

and the water level are returned to
proper operating conditions, the boiler
can be started in the normal manner.

After Dry Lay-Up

To start an idle boiler after dry lay-up, use the
following procedure:

1. Disconnect the nitrogen supply source

and vent the boiler in a safe manner -
external to the building and away from
air intakes. Then thoroughly purge the
boiler of nitrogen with dry air.

2. The boiler was to have been cleaned

before the lay up procedure. So it is
necessary only to fill the boiler with
properly treated water. Then proceed
with start-up

N

OTE

:

OPERATING BOILERS MUST

BE REMOVED FROM SERVICE TO MINIMIZE
ADHERENCE OF BOILER WATER SUSPENDED
SOLIDS ON BOILER METAL SURFACES

.

R

EFER TO PREVIOUS INSTRUCTIONS FOR

BOILER WASHDOWN

.

C

AUTION

:

T

HE USE OF NITROGEN FOR

BLANKETING IS RECOMMENDED IN BOTH THE

WET AND DRY LAY

-

UP PROCEDURES

. E

VEN

THOUGH NITROGEN IN DILUTE QUANTITIES IN

NON

-

TOXIC

,

IT WILL NOT SUPPORT LIFE

.

P

RECAUTIONS MUST BE TAKEN BEFORE
ENTERING EQUIPMENT FILLED WITH

NITROGEN FOR INSPECTION OR ANY OTHER

PURPOSES

. T

HESE PRECAUTIONS SHALL BE AS

FOLLOWS

:

?

D

ISCONNECTION OF NITROGEN SUPPLY

LINE

?

C

OMPLETE PURGING AND VENTING OF

THE EQUIPMENT WITH FRESH AIR

?

T

ESTING OXYGEN LEVELS INSIDE

BEFORE ANY ATTEMPT TO ENTER

?

A

LL CONFINED ENTRY GUIDELINES

APPLICABLE TO SITE MUST BE FOLLOWED

A

PPROPRIATE CAUTION SIGNS SHALL BE

POSTED AROUND THE EQUIPMENT TO ALERT
PERSONAL THAT NITROGEN BLANKETING IS IN
USE

. A

BOILER LAID UP DRY MUST BE TAGGED

WITH INFORMATION THAT THE UNIT IS NOT TO
BE OPERATED UNTIL THE BOILER IS PROPERLY
REFILLED

.

«
...
15
16
17

Summary of Contents for Electric Water Boilers

Page 1: ...allation Operation Service Manual for Electric Steam Boilers E Mail bryanboilers iquest net Internet www bryanboilers com BRYAN BOILERS P O BOX 27 PERU INDIANA 46970 Telephone 765 473 6651 Fax 765 473 3074 ...

Page 2: ...ical panels The element end of the boiler should not have any obstruction for the same length as the boiler supplied for removal and servicing of elements The back of the boiler as long as panels are not supplied in the rear can be mounted next to an obstruction Local codes must be applied to specific installations and the minimum clearances established accordingly Provisions must also be made for...

Page 3: ...rried by the valve 1 4 5 BLOWDOWN CONNECTION Blowdown valve s must be full size of the connection on the boiler Steam boilers 15 psig and below require at least one blowdown valve Higher pressure boilers require two blowdown valves with one or both valves being slow opening type Each water column and float type low water cut off must be equipped with a blowdown valve 1 5 ELECTRICAL CONNECTION IMPO...

Page 4: ...actors are then wired using high temperature wire to each element circuit and bundle located in the element flange discussed earlier 1 6 4 CONTROL CIRCUIT WIRING The control circuit voltage is 120 V single phase and fed from a step down transformer if provided The transformer s primary side is connected to two fuses located in the power panel One side of the secondary is grounded and the other sid...

Page 5: ...a pressure just below the setting of boiler safety relief valve s Remove the boiler access panels see dimensional drawing in this manual Inspect all openings and fittings for any leaks Although the boiler is hydrostatically tested at the factory minor leaks in fittings and attachments can develop from shipping vibrations or from installation procedures It is often necessary to re tighten such fitt...

Page 6: ...hould now cycle on 2 1 4 COIL LIMIT CONTROL On indirect water heating boilers an additional temperature limit control is installed to limit the temperature leaving the heat exchanger It must be tested in the same manner as the boiler High Limit control 2 1 5 LOW WATER CUT OFF S Most boilers are supplied with at least one float operated primary low water cut off and pump control or water feeder com...

Page 7: ...ically test the feedwater to be certain it complies with the recommendations of the chemical treatment consultant 2 2 OPERATING CONTROLLER As previously discussed electric boilers are broken down into branch circuits Each circuit is controlled by a step control if two steps or less then controlled by their own pressure control Step control operates by having a signal sent from the operating contro...

Page 8: ...2 4 MAINTENANCE SCHEDULE 2 4 1 POSTING SCHEDULE Post a maintenance schedule in accordance with the recommendations in this manual A copy of a typical schedule is included in this manual ...

Page 9: ...SPONSIBILITIES During the temporary use period a single individual must be assigned responsibility for the care and operation of the boiler This person s responsibility must include but not be limited to the following 1 Knowledge of boiler operation 2 Possession and understanding of boiler operating instruction manual 3 Assurance that the boiler is fed with only treated water at all times and that...

Page 10: ...phosphate and sodium hydroxide lye are the most commonly used chemicals Use only one type of solution in the system The amount of chemical required will vary according to conditions but an amount of one pound of chemical per fifty gallons of water is suggested 2 Before introducing the solution into the boiler an overflow pipe should be attached to the top of the boiler and routed to a safe point o...

Page 11: ... must be wasted until it runs clear and water analysis of the condensate indicates that it is free of contaminants Steam trap strainers must be periodically opened and cleaned of any debris which accumulates During this system clean out the boiler make up water must be properly softened and treated At the conclusion of the system clean out the condensate must be reconnected For old or existing ste...

Page 12: ...eyond safe or cleanable condition Flush the system clean being certain to isolate the boiler DO NOT FLUSH THE SYSTEM THROUGH THE BOILER CAUTION FAILURE TO PROPERLY CLEAN THE SYSTEM OR TO INSTALL MECHANICAL SEDIMENT REMOVAL EQUIPMENT CAN RESULT IN PIPE BLOCKAGE AND SEVERE CORROSION PLUS DAMAGE TO PUMPS CONTROLS AND AIR REMOVAL DEVICES 3 5 BOILER WATER TREATMENT 3 5 1 PURPOSE OF WATER TREATMENT Wate...

Page 13: ...rder MONTHLY Make visual inspection of all wiring and components Check float low water cutoff as described above For those units equipped with a power burner check low draft fan air pressure and damper position interlocks as specified in burner manual Check branch circuit operation and electrical power panels and check for continuity between elements by using a continuity meter ANNUALLY Check oper...

Page 14: ...his is because scratches corrosion chips and surface damage weaken the glass If inner surface appears cloudy or roughened and will not respond to cleaning procedures this is evidence of chemical attack If severe this is cause for replacement 3 8 4 REPLACEMENT OF GLASS Any glass that has been removed from its mounting in process boilers regardless of the reason for removal should be discarded and r...

Page 15: ...er should not be drained until cooled enough to prevent this However never leave the boiler filled with water for any extended period of time without taking measures to prevent corrosion 3 9 6 LAY UP CONSIDERATIONS There are two basic methods of steam boiler lay up Wet lay up and Dry lay up The choice of which method should be used depends on The possibility that the boiler may need to be placed i...

Page 16: ...to the maintenance of the valves being used to isolate the boiler to prevent leakage and resultant dilution of the lay up solution 3 9 8 ALTERNATE METHOD An alternate wet lay up method is to pipe clean continuous lowdown water from a properly treated boiler into any convenient bottom connection on the idle boiler allowing the water to flow through the boiler and out the top through any convenient ...

Page 17: ...l the boiler with properly treated water Then proceed with start up NOTE OPERATING BOILERS MUST BE REMOVED FROM SERVICE TO MINIMIZE ADHERENCE OF BOILER WATER SUSPENDED SOLIDS ON BOILER METAL SURFACES REFER TO PREVIOUS INSTRUCTIONS FOR BOILER WASHDOWN CAUTION THE USE OF NITROGEN FOR BLANKETING IS RECOMMENDED IN BOTH THE WET AND DRY LAY UP PROCEDURES EVEN THOUGH NITROGEN IN DILUTE QUANTITIES IN NON ...

Reviews:

No comments