Weil-McLain SlimFit 550 Mode d’emploi

User’s

Information Manual

If the information in this manual is not followed exactly, a ﬁre or explosion may result,

causing property damage, personal injury or loss of life.

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 —

• Donottrytolightanyappliance.

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

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

• Ifyoucannotreachyourgassupplier,calltheredepartment.

Installation & service must be performed by a qualiﬁed installer, service technician or the gas supplier.

Gas-ﬁred water boilers

(Models 550 and 750 only)

Commercial Condensing

Part number 550-100-088/0814

The following deﬁned terms are used throughout this manual to bring attention to the presence of hazards of various risk

levels or to important information concerning the life of the product.

Indicates presence of hazards that will cause severe personal injury, death or

substantial property damage.

Indicates presence of hazards that can cause severe personal injury, death or

substantial property damage.

Indicates presence of hazards that will or can cause minor personal injury or

property damage.

Indicates special instructions on installation, operation or maintenance that are

important but not related to personal injury or property damage.

The Boiler manual is for use only by a qualiﬁed heating installer/service technician. Refer only to this User’s

Information Manual for your reference. Improper installation, adjustment, alteration, service or maintenance

can cause property damage, personal injury (exposure to hazardous materials) or loss of life. Installation and

service must be performed by a qualiﬁed installer, service agency or the gas supplier (who must read and follow

the supplied instructions before installing, servicing, or removing this boiler. This boiler contains materials that

have been identiﬁed as carcinogenic, or possibly carcinogenic, to humans).

When calling or writing about the boiler— Please have the boiler model number from the boiler rating label and

the CP number from the label located on the left side of the control box.

Hazard deﬁnitions

Boiler service and maintenance

How to use this manual . . .

To . . . Read/use . . . See pages . . .

Learn precautions Warnings and deﬁnitions 1 – 3

Start or shutdown the

boiler Use the OPERATING INSTRUCTIONS 4

Boiler components &

the U-Control display These illustrations and callouts will show you the location

of main components and use of the U-Control display. 5 – 7

Prevent air

contamination

Read the list of air contaminants you must avoid.

If found, either remove the products permanently, or have

your installer relocate boiler vent and air terminations to

an uncontaminated area.

Maintain the boiler Maintain the boiler using the schedule in this manual.

Schedule an annual start-up by a qualiﬁed service

technician before every heating season. 9 – 15

Part number 550-100-088/0814

SlimFit™

gas-fired water boiler

— User’s Information Manual

Failure to adhere to the guidelines on this page can result in severe personal

injury, death or substantial property damage.

Boiler service and maintenance —

 To avoid electric shock, disconnect all electrical supplies to the boiler before perform-

ing maintenance if wiring will be exposed.

 To avoid severe burns, allow boiler to cool before performing maintenance.

 You must maintain the boiler as outlined in this manual and have the boiler started

up and serviced at least annually by a qualiﬁed service technician to ensure boiler/

system reliability.

Boiler operation —

 Do not block ﬂow of combustion or ventilation air to boiler. This boiler is equipped

with a control which will automatically shut down the boiler should air or vent be

blocked. If vent or air blockage is easily accessible and removable, remove it. If the

boiler display indicates a manual reset lockout, follow the procedure in Figure 4, page 7

to reset the boiler. (If blockage is not obvious or cannot be removed, have the boiler

and system checked by a qualiﬁed service technician.)

 Do not allow contaminated air to enter the boiler room (or air inlet pipe if direct

vented). See page 8 for details.

 Should overheating occur or gas supply fail to shut off, do not turn off or disconnect

electrical supply to boiler. Instead, shut off the gas supply at a location external to

the appliance.

 Do not use this boiler if any part has been under water. Immediately call a qualiﬁed

service technician to inspect the boiler and to replace any part of the control system

and any gas control, which has been under water.

Boiler water —

 Have boiler water chemistry checked at least annually by a qualiﬁed service technician.

 DO NOT use petroleum-based cleaning or sealing compounds in boiler system. Gaskets

and seals in the system may be damaged.This can result in substantial property damage.

 DO NOT use “homemade cures” or “boiler patent medicines”. Serious damage to

boiler, personnel and/or property may result.

 Continual fresh makeup water will reduce boiler life. Mineral build-up in boiler heat

exchanger reduces heat transfer, overheats the metal, and causes heat exchanger fail-

ure. Addition of oxygen can cause internal corrosion in system components. Leaks in

boiler or piping must be repaired at once to prevent makeup water.

 Do not add cold water to hot boiler. Thermal shock can cause boiler heat exchanger

to crack.

STOP! READ THIS BEFORE PROCEEDING . . .

Part number 550-100-088/0814 3

SlimFit™

gas-fired water boiler

— User’s Information Manual

Figure 1 Operating instructions

OPERATING INSTRUCTIONS

Part number 550-100-088/0814

SlimFit™

gas-fired water boiler

— User’s Information Manual

Figure 2 SlimFit component locations

Boiler components

Part number 550-100-088/0814 5

SlimFit™

gas-fired water boiler

— User’s Information Manual

Figure 3 SlimFit boiler’s U-Control display

The U-Control display

Part number 550-100-088/0814

SlimFit™

gas-fired water boiler

— User’s Information Manual

Resetting the U-Control

Figure 4 U-Control display turns red when boiler locks out — select MANUAL RESET to reset boiler as shown below.

To reset:

• Press the DOWN or RIGHT arrow.

• The display will go to the STATUS screen.

• SETTINGS will be highlighted.

• Press the DOWN arrow to move down to MANUAL RESET.

• Press ENTER (center button).

• The display will switch to the manual reset screen, indicating what caused

the shutdown.

• Press ENTER to reset the U-Control.

• The U-Control will than return to normal operation if the condition has

been corrected.

Part number 550-100-088/0814 7

SlimFit™

gas-fired water boiler

— User’s Information Manual

Prevent combustion air contamination

If the boiler combustion air inlet is located in any area likely to cause contamination, or if products which

would contaminate the air cannot be removed, you must have the combustion air and vent re-piped and

terminated to another location.Contaminated combustion air will damage the boiler, resulting in possible

severe personal injury, death or substantial property damage.

Do not operate an SlimFit boiler if its combustion air inlet is located in a laundry room or pool facility,

for example. These areas will always contain hazardous contaminants.

Pool and laundry products and common household and hobby products often contain ﬂuorine or chlorine

compounds. When these chemicals pass through the boiler, they can form strong acids. The acid can eat

through the boiler wall, causing serious damage and presenting a possible threat of ﬂue gas spillage or

boiler water leakage into the building.

Please read the information listed below. If contaminating chemicals will be present near the location of

the boiler combustion air inlet, have your installer pipe the boiler combustion air and vent to another

location, per the Boiler manual.

Products to avoid Areas likely to have contaminants

Spray cans containing chloro/ﬂuorocarbons Dry cleaning/laundry areas and establishments

Permanent wave solutions Swimming pools

Chlorinated waxes/cleaners Metal fabrication plants

Chlorine-based swimming pool chemicals Beauty salons

Calcium chloride used for thawing Refrigeration repair shops

Sodium chloride used for water softening Photo processing plants

Refrigerant leaks Auto body shops

Paint or varnish removers Plastic manufacturing plants

Hydrochloric acid/muriatic acid Furniture reﬁnishing areas and establishments

Cements and glues New building construction

Antistatic fabric softeners used in clothes dryers Remodeling areas

Chlorine-type bleaches, detergents, and cleaning

solvents found in household laundry rooms

Garages with workshops

Adhesives used to fasten building products and

other similar products

Part number 550-100-088/0814

SlimFit™

gas-fired water boiler

— User’s Information Manual

Annual startup and general maintenance

Figure 5 Service and maintenance schedules

OWNER MAINTENANCE (see the following pages for instructions)

BEGINNING OF SEASON

Contact your boiler service technician to inspect, service and start

up your boiler. You must have an annual start-up performed by a

qualiﬁed service technician to ensure reliable operation of the boiler

and system.

DAILY

Check boiler area

Check air openings

Check pressure/temperature gauge

Verify boiler front door is secure

MONTHLY

Check vent piping

Check air piping

Check relief valve

Check condensate drain system

Check automatic air vents (if used)

PERIODICALLY Test low water cutoff

Check time and date on the U-Control display

EVERY

6 MONTHS

Check boiler piping (gas and water)

Operate relief valve

END

OF SEASON Shut boiler down (unless boiler used for domestic water)

Follow the service and maintenance procedures given throughout this manual and in component literature

shipped with the boiler. Failure to perform the service and maintenance could result in damage to the boiler or

system. Failure to follow the directions in this manual and component literature could result in severe personal

injury, death or substantial property damage.

Part number 550-100-088/0814 9

SlimFit™

gas-fired water boiler

— User’s Information Manual

Maintenance and service overview

The boiler must be serviced & maintained

The boiler must be inspected and started annually, at the beginning of the

heating season, by a qualiﬁed service technician.

In addition, the maintenance and care of the boiler listed on Figure 5, page 9

and explained in this manual must be performed to assure maximum boiler

efﬁciency and reliability.

Failure to service and maintain the boiler and system could result in equipment

failure, causing possible severe personal injury, death or substantial property

damage.

Part number 550-100-088/0814

SlimFit™

gas-fired water boiler

— User’s Information Manual

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