Weil-McLain Evergreen EVG 220 Manual Download Page 86

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Startup — fill the system

Part number 550-100-131/0120

– 86 –

gas

fired

water

boiler

— 220/299/300/399

Boiler Manual

Chloride concentration requirement

1. Filling with chlorinated fresh water should be acceptable since

drinking water chloride levels are typically less than 5 ppm.

2. Do not use the boiler to directly heat swimming pool or spa

water.

3. Do not fill boiler or operate with water containing chloride

in excess of 200 ppm.

Verify that the water chemistry meets the limita-

tions and requirements of all other equipment in

the system.

Antifreeze

1. Use only antifreeze listed by Weil-McLain as suitable for use

with

Evergreen

Gas Boilers. See Figure 111, page 117 for

information.

2. See Replacement parts at the end of this manual for

Weil-McLain part numbers to obtain antifreeze through a

Weil-McLain distributor.

Use the correct amount of antifreeze

1. Determine the freezing temperature needed (to protect against

lowest likely temperature the system water will encounter).

2. Find the antifreeze concentration by volume needed for this

temperature from the antifreeze manufacturer’s data on the

antifreeze container.

3. Add up the volume (gallons) of all system piping and compo-

nents, including the expansion tank and boiler.
a. Boiler water content is listed in Figure 124, page 130.
b. Remember to include expansion tank water content.

4. Multiply this volume by the (percent) antifreeze needed to find

the number of gallons of antifreeze to add.

Fill and test water system

1. Fill system only after ensuring the water meets the require-

ments of this manual.

2. Close manual and automatic air vents and boiler drain valve.
3. Fill to correct system pressure. Correct pressure will vary with

each application.
a. Typical cold water fill pressure for a residential system is

12 psig.

b. Pressure will rise when boiler is turned on and system water

temperature increases.

c. Pressure should

NOT

exceed 24 psig when using as

shipped, 30 psig relief valve.

d. Operating pressure should be no higher than 80% of the

relief valve setting for most systems. Operating pressure

must never exceed 80 PSIG.

4. At initial fill and during boiler startup and testing, check system

thoroughly for any leaks. Repair all leaks before proceeding

further.

Eliminate all system leaks. Continual fresh make-up

water will reduce boiler life. Minerals can build up in

the heat exchanger, reducing heat transfer, overheat-

ing heat exchanger, and causing heat exchanger failure.

Purge air from water system

1. Connect a hose to the purge valve (see purge/drain valves, item

11, in piping diagrams beginning on page 43). Route hose to

an area where water can drain and be seen.

2. Close the boiler or system isolation valve between the purge

valve and fill connection to the system.

Clean system to remove sediment

1. You must thoroughly flush the system (without boiler

connected) to remove sediment. The high-efficiency heat
exchanger can be damaged by buildup or corrosion due to
sediment.

If the system needs to be cleaned, we recom-

mend using Sentinel X400 cleaner, available from
Weil-McLain. See Figure 111, page 117 for infor-
mation. Follow instructions supplied with the
X400 cleaner.

2. For zoned systems, flush each zone separately through a

purge valve. (If purge valves and isolation valves are not

already installed, install them to properly clean the system.)

3. Flush system until water runs clean and you are sure piping

is free of sediment.

Do not use petroleum-based cleaning or seal-

ing compounds in boiler system. Damage to
elastomer seals and gaskets in system could oc-
cur, resulting in substantial property damage.

Before filling the boiler and system with water,
verify the following.

DO NOT fill with soft-

ened water.

Boiler corrosion can occur.

Failure to comply could result in boiler failure
or unreliable operation.