In the selection of the boiler plant equipment, consideration shall be given to the following factors:

Types of fuel available and costs;
Dependability of fuel supply;
Daily and seasonal variations of load;
Availability and quality of manufacturer's local service organisation;
Availability of skilled maintenance help;
Need for winter heating and possible utilisation of steam during the cooling season; and
Licensing requirements.

Boilers shall be selected to provide sufficient excess capacity to permit one unit to be removed from service for cleaning and maintenance without seriously affecting the operation of the hotel.

Minimum boiler selection shall be two units, each sized to provide approximately 75% of the peak load. If necessary, one high pressure boiler shall be provided for Kitchen and/or Laundry steam requirements.

Steam may be required at 8.5 kg/cm2 (125 psig) for the Laundry and Valet, and shall be confirmed by the Laundry Consultant. Kitchen equipment steam requirement shall be confirmed by the Kitchen Consultant.

Steam boilers to be designed for nightly shut down. Manual condensate removal valves to be provided at headers and reducing stations for draining each morning after shut down.

The design engineer shall examine anti pollution devices applicable to the equipment and installed as necessary to comply with local code and Sheraton requirements.

Provide automatic blow down controls and water treatment equipment for the boiler system to control water quality and maintain total dissolved solids as recommended by reputable water treatment chemist.

Provide testing equipment to operator for testing of water quality.

Provide for chemical dosing pots for hot water boilers.

Sight glass to have cool down coil and chamber to waste to obtain accurate water samples for analysis.

Boiler Plant

The boiler plant shall be designed to produce steam at a pressure consistent with the results of the economic analysis. Where local codes covering high pressure boilers are restrictive concerning operating personnel, etc., consideration shall be given to the use of separate high pressure boilers for the Kitchen and/or Laundry steam requirement and low pressure steam or hot water boilers for the remaining requirements.

All gas and oil fired boilers shall have a minimum combustion efficiency as listed in relevant ASHRAE standard.

Boilers shall be constructed in accordance with ASME codes.

Type of fuel shall be dependent upon cost and availability. The use of dual fuel burners is mandatory where gas is available.

Where fuel oil is selected as a fuel source, the storage facility shall have a minimum two weeks supply.

The fuel oil tanks shall be constructed of steel in accordance with UST requirements and all required openings. A gasketed manhole with ladder to bottom of tank shall be provided. A minimum of two (2) tanks shall be provided.

Underground tanks shall be installed at least three feet below grade and secured to a reinforced concrete slab. Where local codes permit, or where soil condition requires special consideration, fibreglass tanks may be used in lieu of steel. Provisions shall be made to avoid fuel oil leakage or spillage from the underground fuel tanks as specified in standards for UST’s.

The de-aerator, for a high pressure boiler plant, shall be an automatically controlled packaged type, designed to reduce the oxygen content in the effluent to not more than 0.005cc/litre. The unit shall include transfer pumps and one boiler feed pump per boiler. A stand by pump shall also be supplied.

Boiler blowdown equipment shall include a steam separator connected to the tank. A thermostatically controlled cold water supply shall be provided to cool the condensate before dumping to the drainage system. Boilers with continuous blow down shall have a heat recovery system to preheat boiler make up water.

The fuel oil pump shall be a duplex type with all required shut off water valves and relief valves. Duplex basket strainers, suction and discharge, shall be included.

Heat recovery from steam and condensate systems shall be installed whenever practical.

Anti pollution devices and alarms shall be incorporated, e.g. smoke intensity indicators, recorders, etc.