PVI Industries QUICKDRAW PV500-26 - Manual (Page 9)

QUICKDRAW

Boiler Water Heater
9
PV500-26 06/12
5.5 Thermostat Settings – For Quickdraw instantaneous heaters only
The adjustable operating temperature control is located just above the front control panel cover. This control utilizes
a temperature sensing thermistor located in the control flange on top of the tank. Follow the safety instructions and
warnings included in this manual and with the product, when adjusting the set point of the operating temperature
control to deliver the desired water temperature.
The setpoint (SET) determines the desired stored water temperature in the tank and is factory set at approximately
120°F. If the tank temperature decreases below the set point a call for heat sequence is activated. The heating
sequence is turned off when the tank temperature again reaches the set point value.
To View the Setpoint
1. Press and quickly release the “SET” key. This will display the setpoint for 5 seconds.
To Change the Set Point
1. Press and hold the “SET” key for at least 2 seconds to enter the setpoint change mode.
2. The setpoint is displayed and the LEDs of the first and third digits blink.
3. To change the value, use the “UP” and “DOWN” keys.
4. The new value can be stored either by pressing the “SET” key (the control restores temperature display) or by
waiting the exit time-out to expire (15 seconds).
Key Combinations
1. TO UNLOCK THE KEYBOARD: Press and hold the “UP” + “DOWN” keys for 3 seconds. When the “PON”
flashing message is displayed, the keys are unlocked.
2. TO LOCK THE KEYBOARD: Press and hold the “UP”+ “DOWN” keys for 3 seconds. When the “POF” flashing
message is displayed, the keys are locked.
3. TO RETURN TO TEMPERATURE DISPLAY: Press the “SET” +”UP” keys.
6 START-UP PROCEDURE
1. When placing the unit into operation, open relief valve to purge air from top of tank and begin to fill the tank with
cold water. Check for plumbing leaks. Be sure the tank is completely filled before closing the relief valve.
CAUTION: Do not energize the heater until the tank is full of water. Serious damage may result.
2. Push control switch, located on the control box, to “ON” to activate the three-way valve and thermostats. Check
the valve for operation; the valve actuator motor should “run” to open the valve when operating switch is pushed
“on”. Check operating thermostat settings.
Temperature Setting: The operating thermostat is set at the factory at approximately 120°F and the upper
operating thermostat (if supplied) is set at approximately 125°F. Adjustment may be made by turning the
thermostat’s dial to the desired temperature. The temperature limiting device is factory set at 200°F.
CAUTION: Gradually introduce fluids to the unit. Failure to do so can cause damage to the heat exchanger.
3. Push the operating switch to “OFF” before opening manual main boiler water supply valve. Do not admit boiler
water to the unit suddenly when empty or cold to prevent thermal shock. Gradually open boiler water supply
valve until all passages of the heat exchanger are filled. Slowly bring the unit up to temperature.
WARNING: Do not operate unit under conditions in excess of those specified on nameplate. Failure to
operate the heat exchanger within the design pressure and temperature on the nameplate may result in
damage to the heat exchanger and potential injury to adjacent personnel.
4. 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 control valve to cycle off and on, and check operation of all safety and
operating controls.