Βρυτε Μαγνυμ | Page 15 |
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medium is piped in parallel with the boiler with appropriate valves to prevent the chilled medium from entering the boiler.
The boiler piping system of a hot water heating boiler connected to heating coils located in air handling appliances where they may be exposed to refrigerated air circulation must be equipped with flow control valves or other automatic means to prevent gravity circulation of the boiler water during the cooling cycle.
A boiler installed above radiation level, or as required by the authority having jurisdiction, must be provided with a low water cutoff device either as a part of the boiler or at the time of boiler installation.
4A.3 Freeze Protection – Boiler
Brute Magnum units are not designed to be
placed outdoors, due to the potential for condensate to freeze in the unit.
Proper precautions for freeze protection are recommended for boiler installations in areas where the danger of freezing exists.
Power outage, interruption of gas supply, failure of system components, activation of safety devices, etc., may prevent a boiler from firing. Any time a boiler is subjected to freezing conditions, and the boiler is not able to fire, and/or the water is not able to circulate, there is a risk of freezing in the boiler or in the pipes in the system. When water freezes, it expands. This can result in bursting of pipes in the system, or damage to the boiler, which could result in leaking or flooding conditions.
Do not use automotive
50% properly inhibited HVAC glycol, which contains an antifoamant, is the preferred method of freeze protection for Brute Magnum boilers. The percentage of glycol used in the Brute Magnum boiler must not exceed 50%. Typically, this mixture will
serve as burst protection for temperatures down to approximately
IMPORTANT NOTES: Different glycol products may provide varying degrees of protection. Glycol products must be maintained properly in a heating system, or they may become ineffective. Consult the glycol specifications, or the glycol manufacturer, for information about specific products, maintenance of solutions, and set up according to your particular conditions.
For installations where temperatures are expected to fall below 15°F inside the boiler cabinet, the actuating gas valve must be equipped with a gas valve heater, part number R2010100. Note that some gas trains such as the IRI option may have double actuators, and may require 2 gas valve heaters.
Section 4B
WATER CONNECTIONS — BRUTE MAGNUM WATER HEATER
4B.1 Water System Piping — Water Heater
Hot water piping should be supported by suitable hangers or floor stands. Do not support piping with this appliance. Due to expansion and contraction of copper pipe, consideration should be given to the type of hangers used. Rigid hangers may transmit noise through the system resulting from the piping sliding in the hangers. It is recommended that padding be used when rigid hangers are installed.
The Brute Magnum can be used with several different types of readily available storage tanks. A pump draws water from the storage tank and pumps the water through the heater and back into the tank.
Pipe the outlet from the heater’s relief valve such that any discharge from the relief valve will be conducted to a suitable place for disposal when relief occurs. Do not reduce line size or install any valves in this line. The line must be installed to allow complete drainage of both the valve and the line.
Suggested piping diagrams are shown in Figures 8, 9, 10, and 11. These diagrams are meant only as a guide. Components required by local codes must be properly installed.
The minimum inlet water temperature for the Brute Magnum is 50°F (10°C) to avoid condensing on the copper coils.
4B.2 Hot Water Supply Piping — Water Heater
Follow the tank manufacturer’s guidelines for completion of the hot water system connections.
NOTE: A listed temperature and pressure relief valve listed as complying with the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, 1). ANSI Z21.22 latest edition, or 2). CSA 4.4, of suitable discharge capacity must be installed in the separate storage tank system.
If the Brute Magnum water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, the relief valve may discharge periodically, due to thermal expansion. Means (such as a