INSTALLATION & MAINTENANCE MANUAL FOR
QuickDrawâ
INSTANTANEOUS
ENERGY: WATER TO WATER
U-TUBE SINGLE-WALL & DOUBLE-WALL HEAT EXCHANGERS
TYPICAL CONSTRUCTION
FIGURE 24-1
1. |
U-tube Heat Exchanger |
9. |
Boiler Water Temperature Gauge * |
2. |
Boiler Water Inlet |
10. |
Tridicator * |
3. |
Boiler Water Pump |
11. |
Flow Switch * |
4. |
Control Enclosure |
12. |
Relief Valve (AGA optional) |
5. |
Intratank Circulator |
13. |
Tank Purge Valve * |
6. |
Potable Water Inlet |
14. |
Boiler Water Outlet |
7. |
Potable Water Outlet |
15. |
Check Valve |
8. |
Tank Drain |
|
* Optional |
CAUTION: TEMPERATURES HIGHER THAN 125°F. INCREASE THE RISK OF SCALD INJURY!
IMPORTANT: Clearances for servicing and inspection are 18” at top, sides and rear and a minimum of one tank diameter in front.
PV500-24 03-99 |
1 |
Section 24 |
QuickDrawâ
WATER WITH SINGLE-WALL / DOUBLE-WALL
START-UP OPERATION
1.The boiler water circulating pump has been selected to provide optimum flow through the heat exchanger tubes to meet demand with the available boiler water. The pump is controlled by the thermostat and draws from the operating boiler water loop. When the demand is satisfied, the pump stops, causing the boiler water to bypass the
unit. In addition, the water heater maybe equipped with a continuous operation tank circulation pump. The boiler water circulation pump is sized to satisfy all of the head resistance of the heat exchanger, therefore no pressure drop need be considered for this unit in sizing primary loop pumps.
CAUTION: Temperatures higher than 125°F. increase the risk of scald injury.
START-UP PROCEDURE
1.Fill the tank with water; open the relief valve or a nearby hot water outlet to purge air from the top of tank. Check for plumbing leaks.
2.Push the control switch to “on” position. Check boiler water pump operation. The tank circulating pump should also operate. Check thermostats for proper setting. The thermostats are labeled as to their function. The temperature limiting device is set at 200°F.
Temperature Setting: The thermostats are set at the factory to 120°F on the operating control. Upon startup, the
factory preset operating temperature is visible on the LED indicator of the digital controller. Adjust the temperature using the appropriate up and down arrow keys on the face of the controller. A slight variance in temperature control may be noticed as the digital control tunes, allow time for the temperature to stabilize.
3.Open nearby hot water tap to maintain a flow of water through the tank when starting up units. Regulate flow of water through the tank to allow the boiler water pump to cycle off and on, and check operation of unit.
PV500-24 03-99 |
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Section 24 |
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