When Servicing The Boiler; Boiler System; Water Chemistry Requirements; Freeze Protection - Westinghouse WBRC 140 Series Installation, Start-Up, Maintenance, Parts, Warranty

D. When Servicing the Boiler
WARNING
!
Be sure to disconnect electrical power before opening boiler
cabinet or performing service. Label all wires while performing
service to ensure proper re-wiring of the boiler. Wiring errors can
cause improper or dangerous operation. Failure to do so could
result in an electrical shock, improper boiler operation, property
damage, serious personal injury, or death.
• To avoid electric shock, disconnect electrical supply before
performing maintenance.
• To avoid severe burns, allow boiler and associated equipment
to cool before servicing.
• Do not use petroleum-based cleaning or sealing compounds
in an boiler system. Gaskets and seals in the system may be
damaged. This can result in substantial property damage.
• Do not use "homemade cures" or "patent medicines".
Damage to the boiler, substantial property damage, and/or
serious personal injury may result.
• Always verify proper operation after servicing the boiler.
NOTE: When inquiring about service or troubleshooting, reference
the model and serial numbers from the boiler rating label.
E. Boiler System
• Thoroughly flush the system (without the boiler connected)
to remove sediment. The high efficiency heat exchanger can
be damaged by build-up or corrosion due to sediment. The
manufacturer recommends a suction strainer in all systems.
• Do not use petroleum-based cleaning or sealing compounds
in a boiler system. Gaskets and seals in the system may be
damaged. This can result in substantial property damage.
• Do not use "homemade cures" or "patent medicines".
Damage to the boiler, substantial property damage, 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.
F. Water Chemistry Requirements
CAUTION
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
o
above 135 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.
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 boiler and contact an authorized technician or
licensed professional.
Contaminant
Total Hardness
o
(Residential Use - Below 140 F water
temperature)
Total Hardness
o
(Commercial Use - Above 140 F water
temperature)
Aluminum
Chloride
Copper
Iron
Manganese
pH
Sulfate
Total Dissolved Solids (TDS)
Zinc
Dissolved Carbon Dioxide (CO2)
Table 1 - Water Quality Specifications
G. Freeze Protection
CAUTION
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.
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.
The boiler control is equipped with freeze protection that activates
based on internal water temperature. See the table below for details
on freeze protection operation.
NOTE: Freeze protection will not be active if the boiler loses power.
Freeze Protection Operation
Stage 1 - If control detects water
temperature of 46
turns the internal and external pumps
On for 600 seconds and Off for 30
seconds. This cycle repeats until the
control detects inlet water temperature
System
o o
Freeze of 50 F (10 C) and above.
Protection
Stage 2 - If control detects water
(Activates
temperature of 41
Based on
it turns the burner on to meet a target
Internal
temperature of 104
Water
Temperature) and internal and external pumps will
continuously during this stage until the
control detects inlet water temperature
o o
of 104 F (40 C) and above.
Stage 3 - If control detects water
temperature of 34
Er: 85 will appear on the display.
Table 2 - Freeze Protection Detail
whl-648 Rev. 001 Rel. 003 Date 10.8.19
Maximum Allowable Level
200 mg/l
(12 grains/gallon)
120 mg/l
(7 grains/gallon)
0.05 to 0.2 mg/l or PPM
100 mg/l or PPM
1 mg/l or PPM
0.3 mg/l or PPM
0.05 mg/l or PPM
6.5 - 8.5
205 mg/l or PPM
500 mg/l or PPM
5 mg/l or PPM
15 mg/l or PPM
Range
o o
F (8 C) and below, it
ON or OFF
(Default: ON)
NOTE:
If using
o o
F (5 C) and below,
boiler for
Snow Melt
applications,
o o
F (40 C). The burner
turn Freeze
Protection
OFF.
o o
F (1 C) and below,
7