LP-551 Rev. 3.9.16
18
Water Chemistry*
•
Sodium less than 20 mGL
•
Water pH between 6.0 and 8.0
•
Maintain water pH between 6.0 and 8.0. Check with
litmus paper or have it chemically analyzed by water
treatment company.
•
If the pH differs from above, consult local water
treatment for treatment needed.
•
Hardness less than 7 grains
•
Consult local water treatment companies for unusually
hard water areas (above 7 grains hardness).
•
Chlorine concentration less than 100 ppm
•
Using chlorinated fresh water should be acceptable as
levels are typically less than 5 ppm.
•
Do not connect the boiler to directly heat swimming
pool or spa water.
•
Do not fill boiler or operate with water containing
chlorine in excess of 100 ppm.
*NOTE:
It is recommended to clean the heat exchanger at
least once a year to prevent lime scale buildup. To clean the
heat exchanger, follow the maintenance procedure in this
manual.
Hardness:
Less than 7 grains
Chloride levels:
Less than
100 ppm
pH levels:
6 - 8
TDS:
Less than
2000 ppm
Sodium:
Less than 20 mGL
Piping Components
Water Heating System Piping
System piping MUST be sized per technical pipe requirements
listed in Tables 10 and 11. Reducing pipe size can restrict flow
rate through the boiler, causing inadvertent short cycling and
poor system performance.
Check Valves
Field supplied. Check valves are recommended for installation
as shown in Applications.
Isolation Valves
Field supplied. Full port ball valves are required. Failure to use
full port ball valves could result in a restricted flow rate through
the boiler.
Anti-Scald Mixing Valve
Field supplied. An anti-scald mixing valve is recommended when
storing domestic hot water above 115°F.
Unions
Field supplied. Recommended for unit serviceability. DO
NOT USE DIELECTRIC UNIONS! ONLY BRASS, COPPER, OR
STAINLESS STEEL.
Pressure Relief Valve
Factory supplied on boiler. The pressure relief valve is sized to
ASME specifications. Storage tank may require additional relief
valves depending on local codes.
Water temperature above 140
o
F requires the circulator pump to
run continuously and must have a water hardness of between
5 and 7 grains. Hardness above 7 grains will damage the heat
exchanger and shorten the service life of the boiler.
Minimum VWH Pipe Sizes
220
1” NPT
299 / 301
1 1/4” NPT
399
1 1/2” NPT
Table 12 - Minimum Pipe Sizes
I. Plumbing
The boiler is designed to function in an open loop hot water
supply system. We have included a temperature and pressure
gauge that allows the user to monitor the system pressure and
outlet temperature from the boiler. It is important to note that
the boiler has a minimal amount of pressure drop and must be
calculated when sizing the circulators.
Install the boiler so the gas ignition system components
are protected from water (dripping, spraying, etc.). Allow
clearance for basic service of boiler circulator, valves and other
components.
Observe the minimum 1” clearance around all uninsulated hot
water pipes when openings around pipes are not protected by
non-combustible materials.
Basic steps are listed below, with illustration that will guide
you through the installation of the boiler.
1. Connect the system return marked “Boiler Return”.
2. Connect the system supply marked “Boiler Supply”.
3. Install a circulator as shown in Applications (this manual).
Make sure the circulator is properly sized for the system and
friction loss.
4. Install an expansion tank on the system supply. Consult the
expansion tank manufacturer’s instruction manual (see Part 4,
Section D for water volume) for specific information relating
to expansion tank installation. Size the expansion tank for the
required system volume and capacity.
5. Install a drain valve at the lowest point of the system. Note:
The boiler cannot be drained completely of water without
purging the unit with an air pressure of 15 PSI.
6. The relief valve and temperature and pressure gauge are
included in the accessory kit. A discharge line should be
installed 6” above the drain in the event of a pressure relief.
The pipe size must be the same size as the relief valve outlet.
NEVER BLOCK THE OUTLET OF THE SAFETY RELIEF
VALVE.
Содержание EP-220 VWH
Страница 33: ...LP 551 Rev 3 9 16 33 Figure 24 Cascade Master and FollowerWiring ...
Страница 34: ...LP 551 Rev 3 9 16 34 Figure 25 Internal Connection Diagram ...
Страница 57: ...LP 551 Rev 3 9 16 57 Figure 30 Combustion System Replacement Parts 220kBTU Model ...
Страница 58: ...LP 551 Rev 3 9 16 58 Figure 31 Combustion System Replacement Parts 299 399kBTU Models ...
Страница 59: ...LP 551 Rev 3 9 16 59 Figure 32 Replacement Parts All Models ...
Страница 67: ...LP 551 Rev 3 9 16 67 Maintenance Notes ...
