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d. Depressing test button with "water on probe" for Series PS-801 (auto reset units only):

(Must depress and hold the test button to activate test cycle.)

1.

When test cycle is activated the Green and Red lights will flash.

2.

After 10-seconds (DOB) the Red light will turn "ON".

3.

Burner will turn "OFF".

4.

The Green light will continue flashing as long as test button is depressed.

5.

If a water feeder has been installed and does not have a time delay, it will turn "ON".

(Release test button, if water is still on probe) 

6.

The Green light will stop flashing and turn "ON".

7.

The Red light will start flashing for 15 seconds (DOB) and then turn "OFF".

8.

Burner will turn "ON" as long as there is water on the probe.

9.

If a water feeder has been installed it will turn "OFF".

Testing Control Using "Test Button"

e. Depressing test button with "water on probe" for Series PS-801-M (manual reset units only):

(Must depress and hold test button to activate test cycle.)

1.

When test cycle is activated the Green and Red lights will flash.

2.

After 10 seconds (DOB) the Red light will turn "ON".

3.

Burner will turn "OFF".

4.

The Green light will continue flashing as long as test button is depressed.

(Release test button. You must depress the manual reset button to unlock low water cut-off.)

5.

After depressing manual reset button, the Green and Red lights will flash simultaneously 4 times.

6.

Then the Green light will turn "ON" and the Red light will flash for 15 seconds (DOB) and then turn "OFF".

7.

The burner will turn "ON" as long as there is water on the probe.

(Warning: To prevent flooding, never use a “water feeder” with a manual reset low water cut-off.)

f. Depressing test button with "water off probe" (both auto and manual reset units):

Since control is in "low water" the Green light will flash and the Red light will remain “ON”. The burner will remain
“OFF”.

b. Now fill the boiler with water.

For Series PS-851 (auto reset units only)
1.

When water touches the probe, the Green light will remain "ON".

2.

The Red light will turn "OFF" and the burner will turn “ON” as long as there is water on the probe.

For Series PS-851-M (manual reset units only)

(When water returns to the probe, nothing will happen until the manual reset button is depressed.)

1.

After depressing manual reset button, the Green and Red lights will flash simultaneously 4 times.

2.

Then the Green light will turn "ON" and the Red light will turn “OFF”.

4.

The burner will turn "ON" as long as there is water on the probe.

(

Warning: To prevent flooding, never use a “water feeder” with a manual reset low water cut-off.)

For Series PS-851 & PS-851-M with Red (Low Water) and Green (Power) Lights

a. Before filling the system

, turn on the electric power to the boiler. Set the thermostat to "heat".

For all Series PS-851
1.

Upon initial power up, the Green and Red lights will flash simultaneously 4 times.

2.

The Green and Red lights will turn "ON".

3.

The burner will never turn "ON" during power up, if water is off the probe.

Start-Up

For Series PS-801 & PS-801-M with Red (Low Water) and Green (Power) Lights
(continued)

Содержание McDonnell & Miller GuardDog PS-801 Series

Страница 1: ...for proper operation of all of the limit and operating controls before leaving the site We recommend that secondary redundant Low Water Cut Off controls be installed on all steam boilers with heat in...

Страница 2: ...st lights 3 000 ohm For models with red low water and green power lights 7 000 ohm Control Power Consumption For models with red low water and amber test lights 3 VA For models with red low water and...

Страница 3: ...ine suitable tapping for the probe 2 Locate probe in supply piping using a tee fitting STEP 1 Locating and Installing the Probe 3 1 4 6mm 1 4 6mm A E A F c Using a wrench tighten the probe A into the...

Страница 4: ...clockwise so that the slots in the control base are firmly under the screw heads Tighten the mounting screws F to approximately 2 ft lb 2 6 N m d Identify a desirable location to mount the control as...

Страница 5: ...l shock turn off the electrical power before making electrical connections This low water cut off must be installed in series with all other limit and operating controls installed on the boiler After...

Страница 6: ...ing of 167 F 75 C if the liquid s temperature exceeds 180 F 82 C Failure to follow this warning could cause property damage personal injury or death WARNING Models with Red low water and Amber test Li...

Страница 7: ...CUIT C B D A N 120 VOLT CIRCUIT Connect Hot wire A of 120 volt circuit to terminal H Connect Neutral wire B of 120 volt circuit to terminal N Connect wire C from beginning of Burner circuit thermostat...

Страница 8: ...r LED BB on top of the control housing G 1 If the amber LED BB glows dimly the water level is above the probe 2 If the amber LED BB is off the water level may be below the probe or the water is too pu...

Страница 9: ...ntinue to flash for 15 seconds DOM and then turn OFF 4 The burner will turn ON as long as there is water on the probe Warning To prevent flooding never use a water feeder with a manual reset low water...

Страница 10: ...light will flash for 15 seconds DOB and then turn OFF 7 The burner will turn ON as long as there is water on the probe Warning To prevent flooding never use a water feeder with a manual reset low wate...

Страница 11: ...turn ON as long as there is water on the probe Testing Control Using Test Button e Depressing test button with water on probe manual reset units only Must depress and hold test button to activate test...

Страница 12: ...e adequate conductance Troubleshooting Replace Probe if Teflon insulator is cracked or worn Probe is loose Failure to follow this caution could cause property damage personal injury or death CAUTION C...

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