WHL-052 Rev. 4.28.16
18
Test/replace freeze protection fluid
1. For systems using freeze protection fluids, follow fluid
manufacturer’s instructions to verify inhibitor level and that
other fluid characteristics are satisfactory.
2. Freeze protection fluid must be replaced periodically due to
degradation of inhibitors over time. Follow all fluid manufacturer
instructions.
Piping Components
Heating System Piping
System piping MUST be sized per technical pipe requirements
listed in Tables 6, 7, and 9. 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.
Minimum Pipe Sizes
80 / 110 / 150 / 220
1” NPT
299 / 301
1 1/4” NPT
399
1 1/2” NPT
Table 8 - Minimum Pipe Sizes
I. Plumbing
NOTE:
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 purge and balance valve or shut off valve and drain on
the system return to purge air out of each zone.
4. Install a back flow preventer on the cold feed make-up water
line.
5. Install a pressure reducing valve on the cold feed make-up
water line (15 psi nominal on the system return). This boiler has
a maximum working pressure of 160 psi. You may order a higher
pressure relief valve kit from the factory. Check temperature and
This boiler should not be operated as a potable hot water heater.
It should not be used as a direct hot water heating device.
pressure gauge when operating. It should read a minimum
pressure of 12 psi.
6. Install a circulator as shown in Applications (this manual).
Make sure the circulator is properly sized for the system and
friction loss.
7. 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.
8. Install an air elimination device on the system supply.
9. 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.
10. 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.
J. Fill and Purge Heating System
1. Attach the hose to balance and purge hose connector or
drain valve and run hose to nearest drain.
2. Close the other side of the balance and purge valve or shut
off valve after the drain.
3. Open the first zone balance and purge or drain valve to let
water flow out of the hose. If zone valves are used, open the
valves one at a time manually. NOTE: You should check zone
valve manufacturer’s instructions prior to opening valves
manually, so as not to damage the zone valve.
4. Manually operate fill valve regulator. When water runs out
of the hose, you will see a steady stream without bubbles.
Close the balance and purge valve or drain to stop the water
from flowing. Disconnect the hose and connect it to next zone
to be purged.
5. Repeat this procedure for additional zones (one at a time).
For installations that incorporate standing iron radiation and
systems with manual vents at the high points, follow the
previous section and, starting with the nearest manual air
vent, open the vent until water flows out. Then close the vent.
Repeat the procedure, working your way toward the furthest
air vent. It may be necessary to install a basket strainer in
an older system where larger amounts of sediment may be
present. Annual cleaning of the strainer may be necessary.
Upon completion, make sure that the fill valve and zone
valves are in automatic positions. You must also assure the
purge and shut off valves are in open positions.
K. Freeze Protection Fluids
Use only inhibited propylene glycol solutions which are
specially formulated for hydronic systems. Ethylene glycol
is toxic and can attack gaskets and seals used in hydronic
systems. Glycol mixtures should not exceed 50%. Failure to
do so could result in property damage, severe personal injury,
or death due to scalds.
Содержание WBRE110
Страница 13: ...WHL 052 Rev 4 28 16 13 Figure 5 Boiler Dimensions NOTE All Dimensions Are Approximate ...
Страница 37: ...WHL 052 Rev 4 28 16 37 Figure 25 Internal Connection Diagram ...
Страница 62: ...WHL 052 Rev 4 28 16 62 Figure 30 Combustion System Replacement Parts 80 220kBTU Models ...
Страница 63: ...WHL 052 Rev 4 28 16 63 Figure 31 Combustion System Replacement Parts 299 399kBTU Models ...
Страница 64: ...WHL 052 Rev 4 28 16 64 Figure 32 Cabinet Replacement Parts All Models ...
Страница 65: ...WHL 052 Rev 4 28 16 65 Figure 33 Cabinet Replacement Parts All Models ...
Страница 72: ...WHL 052 Rev 4 28 16 72 Maintenance Notes ...