lp-445-r4 Rev. 006 Rel. 027 Date 7.21.20
6
A. Improper Combustion
Do not obstruct the flow of combustion and ventilating air. Adequate
air is necessary for safe operation. Failure to keep the exhaust vent
and combustion air intake clear of ice, snow, or other debris could
result in property damage, serious personal injury, or death.
B. Gas
Should overheating or gas supply fail to shut off, turn off the manual
gas control valve to the boiler.
C. When Servicing the Boiler
To avoid electric shock, disconnect electrical supply before performing
maintenance.
NOTE:
When inquiring about service or troubleshooting, reference the
model and serial numbers from the boiler rating label.
To avoid severe burns, allow boiler and associated equipment to cool
before servicing.
Be sure to disconnect electrical power before opening boiler cabinet
or performing service. Failure to do so could result in electrical shock,
property damage, serious personal injury, or death.
D. Boiler Water
•
If you have an old system with cast iron radiators, thoroughly
flush the system (without boiler connected) to remove
sediment. The high-efficiency heat exchanger can be damaged
by build-up or corrosion due to sediment. HTP recommends a
suction strainer in this type of system.
•
Do not use petroleum-based cleaning or sealing compounds
in boiler system. Gaskets and seals in the system may be
damaged, possibly resulting in substantial property damage.
•
Do not use “homemade cures” or “boiler patent medicines”.
Substantial property damage, damage to boiler, and/or serious
personal injury may result.
•
Continual fresh make-up water will reduce boiler life. Mineral
buildup in the heat exchanger reduces heat transfer, overheats
the stainless steel heat exchanger, and causes failure. Addition
of oxygen from make-up water can cause internal corrosion
in system components. Leaks in the boiler or piping must be
repaired at once.
NOTE:
DO NOT add cold make up water to the system when the
boiler is hot. Thermal shock can potentially cause cracks in the heat
exchanger. Such damage IS NOT covered by warranty.
NEVER use any toxic chemical, including automotive, standard glycol
antifreeze, or ethylene glycol made for hydronic (non-potable)
systems. These chemicals can attack gaskets and seals in water
systems, are poisonous if consumed, and can cause personal injury
or death.
UNCRATING THE BOILER
- Any claims for damage or shortage in
shipment must be filed immediately against the transportation
company by the consignee.
Part 2 - Before You Start
Failure of the boiler due to freeze related damage IS NOT covered by
product warranty.
E. Freeze Protection
NOTE:
Consider piping and installation when determining boiler
location.
Remove all sides of the shipping crate of the boiler.
Components included with the boiler:
• Temperature and Pressure Gauge
• Outdoor Sensor
• Three (3) Stainless Steel Screens
• Installation Manual and Warranty
• User’s Information Manual
• CSD-1 Form
• H-3 Data Sheet
A. What’s in the Box
B. How the Boiler Operates
ModCon® condensing technology intelligently delivers highly
efficient hydronic heating while maximizing efficiency by measuring
data from the heating system. 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 use
the cold water return from the system and extract the last bit of heat
before it is exhausted.
Modulating Combustion System
The combustion system modulates the output of the burner during
operation to match system demand and achieve the control set
point while in operation. The set point can change by internal or
external signals to enhance the overall performance of the system.
Control
The integrated control system monitors the system and regulates
fan speed to control boiler output. This allows the boiler to deliver
only the amount of heat energy required and nothing more. The
system can be further enhanced by installing an indirect water
heater to provide domestic hot water.
The control can regulate the output of multiple boilers through
its cascade system function. The cascade system is capable of
connecting up to eight boilers together in such a way that they
function as one boiler system. This allows for greater turn down
ratios and provides systematic control of the multiple boilers in an
installation to minimize downtime and maximize efficiency.
The cascade system works by establishing one boiler as the master
and the other connected boilers as followers. The master boiler
requires a sensor to provide feedback on set point temperature
in order to adjust heating input from the connected boilers. Each
cascaded boiler will have its own pump to provide maximum flow
and control heat exchanger flow rate.
NOTE:
When using a system sensor, pipe insulation must be
wrapped around it to improve temperature measurement accuracy
and increase system efficiency.
Text Display and Operational LED Light Indicators
The display allows the user to change system parameters and
monitor system outputs.
F. High Elevation Installations
Natural gas at high elevation might contain less heating value
than typical 1,000 BTU/cu ft and therefore can cause improper
air / gas mix leading to improper combustion. For natural gas
installations above 3,000 ft, call your gas provider to determine
the heating value of the supplied natural gas.
