IMPORTANT!
With electrical power supplied to a
In the event of a power failure at temperatures below freezing, the water heater should be drained of all water to prevent freezing damage.
The unit may be drained manually or through the installation of the Optional solenoid valves as shown.
The electrical connections for the two solenoid valves should be tied to the 120V power terminals provided on the PC Board of the water heater.
When the electrical power to the water heater fails, the cold water supply solenoid valve closes, stopping the flow of water into the heater, and the drain down solenoid valve opens, allowing the water heater and associated piping to drain. Ensure that you run the drain for the solenoids per local codes.
| |
Equipment List | QTY |
3 | |
Water Heaters |
|
Electronic Connection *
*Refer to
Vacuum |
|
|
Breaker | Outdoor | Outdoor |
| ||
| ||
| Water Heater | Water Heater |
| Primary | Sub 1 |
Outdoor
Water Heater
Sub 2
NOTE:
enclosure or recess box and packed with insulation for additional protection.
| Gas Supply Line |
| Normally Closed Solenoid Valve |
Hot Water | (Full Size of Cold Water Supply Line) |
Supply Line | S |
| |
NOTE: | Cold Water Supply Line |
outside building structure. These are indicated |
|
|
| 1/4 “ Minimum |
by being above the dashed line. |
|
| S | Normally Open |
line should be located inside the building |
|
|
| Solenoid Valve |
|
|
| ||
|
|
|
| |
structure. | Route drain |
|
|
|
|
|
|
| |
|
|
| ||
The vacuum breaker line should be located inside | per local codes |
| ||
the building structure. |
|
|
|
|
Domestic Hot Water - Optional Freeze Protection
3 Outdoor
Preferred Piping Installation
Key
3/4" Ball Valve
3/4" Union
Check Valve
Pressure Relief Valve
Pressure Regulator
Circulating Pump
S
Boiler Drain Valve
Solenoid Valve | Mixing Valve |
NOTE: This drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with local building officials before installation. The Contractor or engineer is to determine the necessary components and configuration of the particular system to be in- stalled. It is the responsibility of the engineer or contractor to ensure that the installation is in accordance with all local building codes.
Drawing Date:
September 07, 2008
Drawing Number:
22
