HTP EFT-80 Installation, Start-Up, Maintenance, Parts, Warranty

LP-387 Rev. 7.3.15
18
NOTE: Boiler failure due to improper water chemistry is not
covered by warranty.
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 diers 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 ll 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
Conductivity: Less than 400 uS/cm at 25
o
C
Sodium: Less than 20 mGL
Copper: Less than 0.1 mg/:
Iron: Less than 0.5 mg/L
Clean system to remove sediment*
1. You must thoroughly ush the system (without boiler
connected) to remove sediment. The high-eciency heat
exchanger can be damaged by buildup or corrosion due to
sediment.
2. For zoned systems, ush 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.
*NOTE: It is recommended you clean heat exchanger at
least once a year to prevent lime scale buildup. Follow the
maintenance procedure to clean the heat exchanger in the
Maintenance Section of this manual.
Test/replacefreezeprotectionuid
1. For systems using freeze protection uids, follow uid
manufacturer’s instructions to verify inhibitor level and that
other uid characteristics are satisfactory.
2. Freeze protection uid must be replaced periodically due to
degradation of inhibitors over time. Follow all uid manufacturer
instructions.
Piping Components
Heating System Piping
System piping MUST be sized per technical pipe requirements
listed in Tables 6 and 7. Reducing pipe size can restrict ow 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 ow 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 specications. Storage tank may require additional
relief valves depending on local codes.
H. Check / Control Water Chemistry
Model Minimum Pipe Sizes
55 / 80 / 110 1” NPT
155 / 199 / 285 1 1/4” NPT
399 1 1/2” NPT
Table 7 - 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 o valve and drain
on the system return to purge air out of each zone.
4. Install a back ow 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 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 specic 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:
This boiler should not be operated as a potable hot water
heater. It should not be used as a direct hot water heating
device.

HTP EFT-80 Specifications

General

Brand	HTP
Model	EFT-80
Category	Boiler
Language	English