Section 43. Lead Paint Risk Factor NONE WATER HEATER STORAGE ELECTRIC

Transcription

1 WATER HEATER STORAGE ELECTRIC Lead Paint Risk Factor NONE TABLE OF CONTENTS PART 1: INSTALLATION REQUIREMENTS FOR CONVENTIONAL HOMES... 1 WATER HEATER REPAIRS APPLIANCE REPAIR... 1 WATER HEATER INSTALLATION GENERAL REQUIREMENTS APPLIANCE SIZING LOCATION INSTALLATION ACCESS TO UNIT SEISMIC BRACING PLUMBING DRAIN PAN TEMPERATURE AND PRESSURE REGULATION ELECTRICAL SUPPLY THERMAL EFFICIENCY WATER HEATER TIMER... 4 PART 2: MOBILE HOME CRITERIA INSTALLATION... 5 PART 3: MULTI-FAMILY WHOLE BUILDING CRITERIA MULTI-FAMILY INSTALLATION REQUIREMENTS... 5 PART 4: MEASURE-SPECIFIC POST-INSTALLATION REQUIREMENTS APPLIANCE REMOVAL AND DISPOSAL OPERATIONAL CHECKS CLIENT EDUCATION TOC TABLE OF CONTENTS

2

3 WATER HEATER STORAGE ELECTRIC PART 1: INSTALLATION REQUIREMENTS FOR CONVENTIONAL HOMES WATER HEATER REPAIRS 1. APPLIANCE REPAIR - When assessment indicates operational/electrical fail of the water heater: Applicable repairs shall be made in conformance with the CSD Field Guide and by a qualified technician. Repairs shall be made in conformance with manufacturer s specifications and applicable code requirements. - Platform/Enclosure Floor Repair The flooring under the water heater shall be checked for structural integrity to safely and properly support the water heater. If unsafe, it shall be corrected as a Limited Home Repair before a water heater is repaired or replaced. - Temperature and Pressure Regulation When either a Temperature and Pressure (T&P) relief valve, or an automatic gas shut-off valve plus pressure-relief valve, is not present or is capped off, it shall be repaired in conformance with the CSD Field Guide and Item 10 of this section. - Vent Repair/Extension When appliance vent requires repair or extension, use of UL-181 tape shall never be allowed as a method to seal appliance vent joints. - Abandonment of Appliance When repair or replacement of the water heater is beyond the program scope, it shall be offered to the client to abandon the appliance in conformance with CSD program policy. WATER HEATER INSTALLATION 2. GENERAL REQUIREMENTS - Installation shall be in conformance with: Product listing and manufacturer s instructions and specifications. Applicable codes, including the current California Electrical Code (CEC), California Plumbing Code (CPC), and local codes. Any existing water leaks shall be repaired before installation begins. 3. APPLIANCE SIZING - Replacement Water Heater Capacity, the First Hour Rating Unit shall comply with the greater of: - Manufacturer s sizing recommendations, or - Applicable code requirements. Storage unit capacity shall be not less than the Uniform Plumbing Code (UPC) minimum First Hour Rating guidelines, as shown in Table When enclosure size limitations restrict the replacement unit s capacity, sizing for a smaller unit requires a program waiver and proper documentation of the condition in the client file. 43-1

4 TABLE 43-1: MINIMUM CAPACITY FOR WATER HEATERS (FIRST HOUR RATING) Number of Bathrooms 1 to to to 3.5 Number of Bedrooms First Hour Rating * First Hour Rating is water heating capacity expressed in gallons. In other words, it is the amount of hot water the heater can supply per hour (starting with a tank full of hot water). Find the First Hour Rating on the yellow EnergyGuide label to determine the size of tank needed. 4. LOCATION - All Units Clearances shall be in compliance with listing requirements, manufacturer s instructions, the CPC, and local code. Location shall be structurally sized/constructed to safely support the weight of the tank. - Units in Enclosures Access door shall be at least 24" wide, and high enough to accommodate removal of the appliance. 5. INSTALLATION - The tank shall be installed: Plumb and level in a stable position. With a minimum clearance per manufacturer s instructions. With information labels and access panels facing outward. The volume and pressure of the water supplied to the appliance will be in accordance with manufacturer specifications. - Support Units supported from the ground shall rest on a level code-compliant base which extends at least 3 above the ground. 6. ACCESS TO UNIT - Units in Enclosures Access door shall be at least 24" wide, and high enough to allow removal of the existing appliance. - Units in Attics Access shall have a minimum 22" x 30" opening, with unobstructed passageway, and a minimum 30" x 30" working platform on the front service side of the water heater. 7. SEISMIC BRACING - All Tanks Unit shall be braced (strapped or anchored) to resist horizontal movement during an earthquake only when a replacement water heater is installed. - Bracing shall be: Installed per manufacturer s instructions and local code. Securely attached to structural framing or ledger board. - Strap Locations Two straps shall be installed: one within the upper third of the tank, and one within the lower third of the tank. 43-2

5 Strap shall not hinder removal of thermostat access covers. 8. PLUMBING - All Units All fittings and valves shall be installed using NEW materials per manufacturer s instructions and local code. PEX tubing shall not be installed within the first 18 of piping connected to a water heater. Threaded fittings shall be sealed with Teflon tape or non-toxic pipe joint compound. A cold water supply shutoff valve shall be installed if not present. Flexible connectors shall be used to connect the tank to the rigid hot and cold water lines. Dielectric insulators shall be installed on water piping connections to the tank, when required by local code. Backflow prevention shall be installed in accordance with manufacturer specifications and in accordance with the authority having jurisdiction. 9. DRAIN PAN - Pan Drain pan shall be 4 in height if leakage is likely to cause damage to the home. A watertight pan of corrosion-resistant material shall be installed when the water heater is located in: - An attic or on a floor-ceiling assembly, or - Other location for which a pan is required by local code. - Drain A minimum 3/4" diameter drain line from the pan shall be installed. Line shall have a continuous downward slope to the exterior, or to a drain system, in accordance with local code. 10. TEMPERATURE AND PRESSURE REGULATION - Safety Controls One of the following shall be installed in conformance with the water heater manufacturer s instructions and local code: - A Temperature and Pressure (T&P) Relief Valve with drain line, or - An automatic gas shutoff valve and pressure-relief valve, when T&P valve and drain line are not feasible. - The T&P Relief Valve and Automatic Gas Shutoff Valve: Shall meet the sizing/pressure requirements of the water heater listing and be compliant with the requirements of the local jurisdiction. - T&P Relief Valve Drain Line Line shall be galvanized steel, hard drawn copper, or CVPC. Internal diameter of the line and fittings shall equal or exceed diameter of the relief valve outlet. The line shall drain fully by gravity and shall not be trapped. Drain line shall terminate outside the building, or in an approved drain system, with the terminal end: - No more than 24", nor less than 6", above the surface, and 43-3

6 - Unthreaded, and pointing downward. - House Line Pressure House line pressure shall be verified to be in compliance with Water Heater manufacturer s specifications. A House Line Pressure Regulator shall be installed or replaced, when needed to limit water pressure to the tank at the specified maximum. - Expansion Tank A potable water expansion tank will be installed on the cold water side. A direct connection with no valves between the storage tank and expansion tank will be installed in accordance with the authority having jurisdiction and according to manufacturer specifications. 11. ELECTRICAL SUPPLY - Electrical service shall be checked to ensure that a safe circuit with proper conductors and capacity is present or will be provided. - All electrical wiring, disconnects, and overcurrent protection shall be in conformance with: Manufacturer s instructions, and The California Electrical Code (CEC), and local code. - The branch circuit supplying power to the unit shall have: Capacity of at least 125% of the nameplate rating of the water heater. Properly-sized conductors for the overcurrent protection used. - The Water Heater shall be: Protected by a fuse or circuit breaker of the proper amperage rating. Properly grounded to the electrical service. 12. THERMAL EFFICIENCY - Hot and Cold Water Pipes Pipe insulation shall be installed in accordance with CSD WIS Section 18 (Water Heater Pipe Insulation). Heat traps shall be installed on the inlet and outlet piping where not provided by manufacturer. - Tank Replacement water heater shall have a minimum internal insulation of at least R-16; therefore, no external insulation shall be installed in accordance with CSD WIS Section 16 (Water Heater Insulation). Because California regulations for internal tank insulation exceed the federal regulations, an external insulation blanket shall not be installed on a replacement water heater. 13. WATER HEATER TIMER - A Water Heater timer shall be installed: When prescribed by program Policy (see CSD Field Guide Measure-Specific Policy for Water Heater Timer Electric ). In compliance with CSD WIS Section 44 (Electric Water Heater Timers). 43-4

7 PART 2: MOBILE HOME CRITERIA Section INSTALLATION - Water heater shall be: In compliance with requirements of the California Department of Housing and Community Development (HCD). Water heater is not required to be listed/labeled for installation in a mobile home, unless required be HCD. - Access requirements and unit installation shall be in conformance with: Manufacturer s instructions, and HCD requirements, and Installation guidelines in this section. PART 3: MULTI-FAMILY WHOLE BUILDING CRITERIA 15. MULTI-FAMILY INSTALLATION REQUIREMENTS - General All measure installation for these projects must conform to the latest adopted version of the and the DOE Standard Work Specifications for Multi-Family Home Energy Upgrades, which is incorporated here by reference and available at: PART 4: MEASURE-SPECIFIC POST-INSTALLATION REQUIREMENTS 16. APPLIANCE REMOVAL AND DISPOSAL - Requirements of the local jurisdiction shall be followed to: Remove old water heater and associated components. Seal any unused chimney openings and penetrations. Remove unused oil tank, lines, valves, and associated equipment. All work shall be completed by a licensed plumbing professional where required by the authority having jurisdiction and installed to industry-accepted standards. - Shell or Structural Damage Any penetrations to the exterior of the home created by the installation of the replacement water heater shall be sealed. 17. OPERATIONAL CHECKS - Water Heater Operation/Commissioning The water heater shall be tested in compliance with manufacturer specifications and relevant industry standards and shall perform properly and safely. - Thermostat Temperature Thermostats shall be set at 120 F, unless higher temperature is requested by the client or is required for medical reasons, or as prescribed by local code. - Other Appliances Appliances turned off during the installation of the water heater shall be returned to standard operating condition. 43-5

8 18. CLIENT EDUCATION - Crew Responsibilities Completed work will be reviewed with the client. Clients shall be educated on the safe and efficient operation and maintenance of the system, including: - Adjustment of water temperature and target temperature in accordance with local code. - Periodic drain and flush. - Expansion tank and backflow preventer (no client maintenance required). - Periodic inspection, maintenance, or replacement. 43-6