HTP EL-399 - Manual (Page 9)

9
LP- 293 REV. 5.20.14
F. BOILER WATER CHEMISTRY*

Sodium less than 20mGL.

Water pH between 6.0 and 8.0
o Maintain water pH between 6.0 and 8.0. Check with litmus paper or have it chemically analyzed by water treatment
company.
o If the pH differs from above, consult local water treatment company for treatment needed.

Hardness less than 7 grains
o Consult local water treatment companies for unusually hard water areas (above 7 grains hardness).

Chlorine concentration less than 100 ppm
o Using chlorinated fresh water should be acceptable as levels are typically less than 5 ppm.
o Do not connect the boiler to directly heat swimming pool or spa water.
o Do not fill boiler or operate with water containing chlorine in excess of 100 ppm.

*NOTE: It is recommended to clean heat exchanger at least once a year to prevent lime scale buildup. To clean the heat
exchanger, follow the maintenance procedure in Part 13, Section B of this manual.
Hardness: 7 grains
Chloride levels: 100 ppm
pH levels: 6-8
TDS: 2000 ppm
Sodium: 20 mGL
G. FREEZE PROTECTION FLUIDS
NEVER use automotive or standard glycol antifreeze, or ethylene glycol made for hydronic systems, with this boiler. Use only inhibited
propylene glycol solutions, which are specifically formulated for hydronic systems. Ethylene glycol is toxic and can attack gaskets and
seals used in hydronic systems.
Consider boiler piping and installation when determining boiler location.
NOTE: Damages resulting from incorrect installation or from use of products not approved by HTP, Inc. ARE NOT covered by warranty.
PART 2 – BEFORE YOU START
A. WHAT’S IN THE BOX
Also included with the boiler:

Temperature and Pressure Gauge (Part #7250P-211)

Pressure Relief Valve (Part #7250P-080)

Indirect Sensor

Outdoor Sensor

Intake PVC Tee with Screens

Exhaust PVC Coupling with Screens

Outlet Combination Fitting ( 1” - Part #7450P-134 for EL80/110/150/220, 1.25” - #7450-135 for EL299/301, 1.5” - #7450-136 for
EL399)

Installation Manual

Warranty

CSD-1 Form

H-3 Data Sheet

NAT to LP Conversion Kit (Part #7450P-223) (Included with NAT models)

LP to NAT Conversion Kit (Part #7450P-224) (Included with LP models)
B. HOW BOILER OPERATES
Elite ® condensing technology intelligently delivers hydronic heating while maximizing efficiency. Outlined below are the features of the
system and how they operate:
Stainless Steel Heat Exchanger - The highly efficient stainless steel heat exchanger is designed to extract all available heat from the
supply line before it is exhausted.