Brute FT Series, Руководство пользователя

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Page 78
8.3 Freeze Protection (continued)
SECTION 9 Installation Check
9.1 Quick View
Before Installing
- Make sure that there is enough space for installing
Water and gas line.
Verify vent/air termination is located as required.
- All models need for propane Conversion which
requires a separate gas conversion manual.
Install Water Piping
- Boiler loop piping must be sized to the minimums
listed in the Boiler manual. Using smaller piping will
cause performance problems.
Install Vent & Air Piping
- Slide the air inlet pipe and vent pipe into the Boiler
pipe connector.
- Make sure the terminations are placed as required in
the manual and that air intakes are at least 12 inches
above normal snow line.
- Refer to the material check list in this guide for a list
of items needed.
Install Condensate Piping / Tubing &
Components
- Fill out the material check list in this guide to ensure
you have the tubing or PVC pipe and all components
needed for the condensate piping.
- Connect internal components that are supplied with
the Boiler.
Install Gas Piping
- Install a union and shutoff valve.
Wire the Boiler
- Connect power wiring and control wiring per boiler
manual wiring diagram.(Section 4.19)
Start up, Adjust & Test
- Follow the Boiler manual instructions to clean the
system if needed, then fill and check water chemistry.
Some items to consider are
• Consider the effects of reduced heat transfer and
an increase in head pressure against the system
circulator. For example: A 30% mixture of glycol will
result in a BTU output loss of 15% with a 5% increase
in head against the system circulator.
• Glycol mixtures should not exceed 50%. A 50%
mixture of glycol will result in a BTU output loss of
30% with a 50% increase in head against the system
circulator.
• The glycol solution should be tested as
recommended by the glycol manufacturer but not
less than annually. Some items of concern are pH
additive breakdown, inhibitor reduction, etc.
• Glycol/antifreeze solutions expand more than water;
therefore, system design must take this into account.
For example: a 50% by volume solution expands
4.8% in volume for a temperature increase from 32◦F
to 180◦F, while water expands 3% over the same
temperature rise.
CAUTION
It is highly recommended to follow the manufacturers
recommended concentrations, expansion
requirements, and maintenance recommendations.
You must carefully calculate the additional friction
loss in the system as well as the reduction in the heat
transfer coefficients.
_________________________________________
WARNING
Do NOT use automotive antifreeze or
ethylene glycol. Use only inhibited propylene
glycol solutions which are specially
formulated for hydronic systems. Ethylene
glycol is toxic and can attack gaskets, seals,
and metallic components used in hydronic
systems. A correct glycol concentration and
inhibitor level is critical.