LP-517 Rev. 000 Rel. 019 Date 7.21.20
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• Water pH between 6.5 and 8.5
• Hardness less than 7 grains (120 mg/L) (Water temperatures
of 140
o
F and greater)
• Chloride concentration less than 100 ppm (mg/L)
• Total Dissolved Solids (TDS) less than 500 ppm (mg/L)
*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.
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.
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.
*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 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.
NOTE: Boiler failure due to improper water chemistry is not
covered by warranty.
B. Check for Gas Leaks
Before starting the boiler, and during initial operation, smell near
the floor and around the boiler for gas odorant or any unusual odor.
Remove boiler front door and smell interior of boiler enclosure.
Do not proceed with startup if there is any indication of a gas leak.
Repair any leaks at once.
C. Freeze Protection (When Used)
1. Determine the freeze protection fluid quantity using total system
water content following the fluid manufacturer’s instructions.
Remember to include expansion tank water content.
2. Local codes may require back flow preventer or actual disconnect
from city water supply.
3. When using freeze protection fluid with automatic fill, install a
water meter to monitor water makeup. Freeze protection fluid may
leak before the water begins to leak, causing concentration to drop,
reducing the freeze protection level.
NEVER use automotive or standard glycol antifreeze. Do not use
ethylene glycol made for hydronic systems. Use only freeze-
protection fluids certified by fluid manufacturer as suitable for
use with stainless steel boilers, verified in the fluid manufacturer’s
literature. Thoroughly clean and flush any system that has used
glycol before installing the new boiler. Provide the boiler owner with
a material safety data sheet (MSDS) on the fluid used.
D. Fill and Test Water System
Ensure the boiler is full of water before firing the burner. Failure to do
so will damage the boiler. Such damage IS NOT covered by warranty,
and could result in property damage, severe personal injury, or
death.
1. Fill the system only after ensuring water chemistry meets the
requirements listed in this manual.
2. Close the manual and automatic air vents and boiler drain valve.
3. Fill to the correct system pressure. Correct pressure will vary with
each application.
a. Typical cold water fill pressure for a residential system is 12 psi.
b. Pressure will rise when boiler is turned on and system water
temperature increases. Operating pressure must never exceed the
relief valve pressure setting.
4. At initial fill and during boiler startup and testing, check system
thoroughly for 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, overheating the heat exchanger and
causing heat exchanger failure.
5. The system may have residual substances that could affect
water chemistry. After the system has been filled and leak tested,
verify that water pH and chloride concentrations are acceptable by
sample testing.
It is important to purge the system of air to avoid damage to the
boiler.
E. Purge Air from Water System
Purge air from the system:
a. Connect a hose to the purge valve and route hose to an area
where water can drain and be seen.
b. Close the boiler or system isolation valve between the purge
valve and fill connection to the system.
c. Close zone isolation valves.
d. Open quick-fill valve on cold water make-up line.
e. Open purge valve.
f. Open the isolation valves one zone at a time. Allow water to
run through the zone, pushing out the air. Run water until no
noticeable air flow is present. Close the zone isolation valves and
proceed with the next zone. Follow this procedure until all zones
are purged.
g. Close the quick-fill water valve and purge valve and remove
the hose. Open all isolation valves. Watch the system pressure rise
to correct cold-fill pressure. It is recommended that you put the
pumps into manual operation to assist in purging the circuits.
h. Disconnect the wires that are connected to the THERMOSTAT
terminals of the customer connection board. Apply power to the
boiler. The display will show READY. Press the
v
and
ENTER
keys
simultaneously and hold for 1 second. The display will read:
The central heating pump will come on. If you then press the
^
key, the central heating pump will shut off, the DHW pump will
come on, and the display will read:
If the boiler is set up as a cascade master and you then press the
^
key again, the DHW pump will shut off, the system pump will come
on, and the display will read: