background image

L

K

J

A

4

a.

Slip the ring terminal lead (J) followed by the
lockwasher (K) over the threaded end of the
probe (A). Tighten the wing nut (L) onto the
probe to approximately 1/2 ft•lb (.65 N•m).

A

Q

J3

b.

Connect the probe (A) to the wiring circuit by sliding the

female quick-connect terminal of the probe wire onto the
male spade terminal J3 probe (terminal may be marked
J7 on older units).

F

F

G

b.

Using a flathead screwdriver, loosen the probe

mounting screws (F) 1/8" (3mm) about 1-1/2
turns and slip the control housing (G) over these
two screws at a 20˚ angle.

20

°

G

c.

Rotate the control housing (G) 20˚ counter-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 assembly (G) and comply with the following steps:

1. Using a level, draw a horizontal line at the

location and mark two positions 1-1/4" (31.75
mm) apart on the horizontal line.

2. Drill a 0.113 dia. hole 1/2" (13 mm) deep in

each position on the horizontal line.

3. Insert the two (2) sheet metal screws (provided)

into the two holes. Using a flathead screwdriver,
tighten the screws so that the base of the screw
head is 1/8" from the mounting surface.
* Repeat Steps 2b. and 2c. above.

1

/

4

"

(31.75mm)

Remote Mounting

Direct Mounting

Direct Mounted Probe

STEP 3 - Probe Wiring

STEP 2 - Installing Control Box (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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