NTI TRX150, Руководство пользователя

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Part 1 - General Safety Information
F. CH and DHW Loop Water Chemistry Requirements
The water must be potable, free of corrosive chemicals, sand,
dirt, and other contaminates. It is up to the installer to ensure the
water does not contain corrosive chemicals or elements that can
damage the heat exchanger. Potable water is defined as drinkable
water supplied from utility or well water in compliance with EPA
secondary maximum contaminant levels (40 CFR Part 143.3). If
the water contains contaminants higher than outlined by the EPA,
water treatment is recommended and additional, more frequent
maintenance may be required. See Table 1.
If you suspect that your water is contaminated in any way,
discontinue use of the appliance and contact an authorized
technician or licensed professional.
Chemical imbalance of the water supply may affect efficiency and
cause severe damage to the boiler and associated equipment.
Water quality must be professionally analyzed to determine
whether it is necessary to treat the water. Various solutions are
available to adjust water quality. Adverse water quality will affect
the reliability of the system. In addition, operating temperatures
above 135
o
F will accelerate the build-up of lime scale and possibly
shorten boiler service life. Failure of a boiler due to lime scale
build-up, low pH, or other chemical imbalance IS NOT covered by
the warranty.
CAUTION
CAUTION
CH Loop Total Water Hardness Specifications
Contaminant Maximum Allowable Level
Total Hardness
120 mg/l
(7 grains/gallon)
DHW Loop Total Water Hardness Specifications
Contaminant
Maximum Allowable Level
Total Hardness
(Below 140
o
F water temperature)
200 mg/l
(12 grains/gallon)
Total Hardness
(Above 140
o
F water temperature)
120 mg/l
(7 grains/gallon)
CH and DHW Loop Water Quality Specifications
Contaminant Maximum Allowable Level
Aluminum 0.05 to 0.2 mg/l or PPM
Chloride 100 mg/l or PPM
Copper 1 mg/l or PPM
Iron 0.3 mg/l or PPM
Manganese 0.05 mg/l or PPM
pH 6.5 - 8.5
Sulfate 205 mg/l or PPM
Total Dissolved Solids (TDS) 500 mg/l or PPM
Zinc 5 mg/l or PPM
Dissolved Carbon Dioxide (CO2) 15 mg/l or PPM
Table 1 - Water Quality Specifications
G. Freeze Protection
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.
Consider piping and installation when determining boiler location.
Damages resulting from incorrect installation or from use of
products not approved by the manufacturer ARE NOT covered by
warranty. Failure of the boiler due to freeze related damage IS NOT
covered by product warranty.
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:
NTI DOES NOT WARRANT THE BOILER AGAINST FREEZE-RELATED
DAMAGE.
The boiler control is equipped with freeze protection that activates
based on internal water temperature. See the following table for
details on freeze protection operation.
NOTE:
Freeze protection will not be active if the boiler loses power.
WARNING
FREEZE PROTECTION OPERATION
STAGE 1
Condition
The water temperature detected by probes NTC1 or
NTC2 ranges between 39
o
F (4
o
C) and 46
o
F (8
o
C).
Events
• The internal pump operates at high speed.
• The 3-Way Valve alternately switches positions - 1
minute on heating mode to 1 minute on DHW
mode
• The display shows the icon.
Time
Until the NTC1 and NTC2 temperature is greater than or
equal to
46°F (8°C)
If after 20 minutes the conditions described in Stage 1
are still present, the boiler proceeds to Stage 2.
STAGE 2
Condition
The water temperature detected by probes NTC1 or
NTC2 is less than 39
o
F (4
o
C).
Events
• The burner turns on at minimum power.
• The 3-Way Valve is positioned on DHW and
switches every 30 seconds between CH and DHW.
• When the temperature is greater than or equal to
104
o
F (40
o
C) the burner will turn off. The boiler will
maintain the temperature between 95
o
F (35
o
C)
and 104
o
F (40
o
C) for 45 minutes.
• After 45 minutes there will be 2 minutes of post
heating circulation.
• If the temperature falls below 46
o
F (8
o
C) within
150 minutes the burner will immediately power on
again.
• The display shows the icon.
Time
Until the NTC1 temperature is greater than or equal to
104
o
F (40
o
C)
Table 2 - Freeze Protection Detail