lp-666 Rev. 003 Rel. 001 Date 2.25.20
6
A. Improper Combustion
WARNING
!
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.
WARNING
!
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
suction and/or magnetic strainers 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.
WARNING
!
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.
NOTICE
Part 2 - Before You Start
CAUTION
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:
• Outdoor Sensor (7250P-319)
• Intake / Exhaust Screens (400 - 500 Models [7550P-995], 650
- 1000 Models [7550P-996], 1500 - 2000 Models [7550P-997])
• 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
Condensing technology intelligently delivers highly efficient
hydronic heating while maximizing efficiency by measuring data
from the heating system. The following are features of the system
and how they operate.
F. High Elevation Installations
WARNING
!
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.
Do not use this boiler for anything other than its intended purpose
(as described in this manual). Doing so could result in property
damage and WILL VOID product warranty.
CAUTION
High heat sources (sources generating heat 100
o
F / 37
o
C or greater,
such as stove pipes, space heaters, etc.) may damage plastic
components of the boiler as well as plastic vent pipe materials. Such
damages ARE NOT covered by warranty. It is recommended to keep
a minimum clearance of 8” from high heat sources. Observe heat
source manufacturer instructions, as well as local, state, provincial,
and national codes, laws, regulations and ordinances when installing
this boiler and related components near high heat sources.
Due to low water content of the boiler, improperly sizing the boiler
in regard to heating load will result in excessive boiler cycling and
accelerated component failure. HTP DOES NOT warrant failures
caused by improperly sized boiler applications. DO NOT oversize the
boiler to the system. Modular boiler installations greatly reduce the
likelihood of boiler oversizing.
NOTE: Loops Serving Indirect Water Heaters (IWHs)
Glycol used in IWH loops should be food grade propylene glycol,
FDA rated as “generally recognized as safe” (GRAS). If using a glycol /
potable water mix, the water chemistry must meet the requirements
in this manual. The glycol content of the liquid must not exceed 50%,
unless the manufacturer specifies a different ratio. Glycol should be
checked periodically to prevent it from becoming acidic. Please refer
to guidelines provided by the glycol manufacturer regarding glycol
maintenance.
NOTE:
Glycol not recognized as GRAS may only be used in closed
loop CH applications.
NOTE:
HTP DOES NOT WARRANT THE BOILER AGAINST FREEZE-
RELATED DAMAGE.
The boiler control is equipped with freeze protection that activates
based on internal water temperature.
NOTE:
Freeze protection will not be active if the boiler loses power.