Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
501.2 Water heater as a space heater |
When a combination potable water heater and space heating system requires water for space heating at temperatures greater than 140° a master thermostatic mixing valve shall be provided to limit water to 140° or less |
|
|
501.6 Water temperature controlling in piping for tankless water heater‘s |
The temperature of water from tankless water heater‘s Shelby not greater than 140°F where he intended for domestic use |
|
|
501.9 Thermal expansion Control (tank) |
Supplied with cold water that passes through a check valve or backflow preventer, Shall Hav a expansion control connected downstream of all check valves, Backflow Devices. The tank shall be sized in accordance with manufactures instructions |
|
|
502.2 Rooms used as a plenum. |
Water heaters using solid, liquid or gas fuel shall not be installed in a room containing air handling machinery where search room is used as a Plenum. |
|
|
502.3 Water heaters installed in attics |
Attics containing a water heater, Shall be provided with a opening an unobstructed passageway, not less than 30 inches high by 22 inches in width no more than 20 feet in length from the access point. A level pathway not less than 24 inches in width The entire length of the passageway |
|
|
502.5 Clearance for maintenance and replacement. |
Applying to shower be provided with access for inspection or repair or replacement. Free from any obstructions besides what is necessary for the appliance. A level working space of not less than 30 x 30 shall be provided on the Control side of the appliance |
|
|
503.3 Water heater materials |
All water heaters and water heating equipment shall have a minimum of 4 feet developed length of copper tubing or similar metallic piping materials connecting directly to the inlet and outlet of the unit |
|
|
504.1 Anti-siphon device |
Such as a cold water dip tube with a hole at the top or a vacuum relief valve installed in the cold water supply line above the top of the heater or tank. Shall be provided to prevent siphonage |
|
|
504.2 Vacuum relief valve |
Bottom fed water heaters bad and fed tanks connected to water heaters, shall have vacuum relief valve installed |
|
|
504.5 Relief valve approval. |
All valves shall bear The label of an improved agency and shall have a temperature setting of not more than 210°F and a pressure setting not exceeding The tank or water heater manufactures rated working pressure were 150 psi whatever is less. The t&p valve, Shall be equal or exceed the heat input to the water heater or storage tank |
|
|
504.6 Requirements for discharge piping |
Not be directly connected to the drainage system, discharge through an air gap located in the same room as a water heater. Terminate not more than 6 inches above and not less than two times the discharge pipe diameter |
|
|
504.7 Required pan |
Where a storage tank for water heater is installed that would cause damage. They shall be installed in a pan constructed of the following Galvanize steel, aluminum Plastic not less than .036 inches in thickness A plastic pan shall not be installed beneath a gas fired water heater |
|
|
504.7.1 Pan size and the drain |
The pain Shall be not less than 1 1/2” in depth and be a sufficient size and shape to receive oh dripping currency from the tank or water heater. The pain should be drained by indirect waste and pipe size not less than 3/4 inch from pan |
|
|
504.7.2 Pan drain termination |
The drain Xiao extend to exterior of the building and terminate not less than 6 inches and not more than 24 inches above adjacent ground surface. Where a pain drain was not previously installed a pain drain is not required for a replacement water heater |
