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7

B

H

1

2

3

4

5

BURNER

CIRCUIT

C

D

B

A

N

120 VOLT

CIRCUIT

L

1

L

2

T

1

T

2

24 VOLT

TRANSFORMER

(BY OTHERS)

E

• Connect wire (A) of 120 volt circuit to terminal (1) and 

terminal (L1) of transformer.

• Connect wire (B) of 120 volt circuit to terminal (2) and 

terminal (L2) of transformer.

• Connect wire (C) to terminal (3) and terminal (T1) of transformer.

• Connect wire (D) from beginning of Burner circuit (thermostat,

gas valve, limits, etc.) to terminal (5).

• Connect wire (E) from end of Burner circuit to terminal (T2) of

transformer.

PS-801/851 with 24 Volt Burner Circuit with Red (Low Water) and
Amber (Test) Lights

G

e.

Place the cover on the control housing, and, 
using a flathead screwdriver, tighten the two 
(2) screws into the control housing and 
cover (G) to approximately 2 ft•lb (2.6 N•m).

INSTALLATION COMPLETE

E

H

N

H

C

W

B

BURNER

CIRCUIT

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,

gas valve, limits, etc.) to terminal (B).

• Connect wire (D) from end of Burner circuit to terminal (N).

• Connect jumper wire (E) to terminals (H) and (C).

PS-801/851 with 120 Volt Burner Circuit with Red (Low Water) and
Green (Power) Lights

E

H

N

H

C

W

B

BURNER

CIRCUIT

E

C

B

A

N

120 VOLT

CIRCUIT

L

1

L

2

T

1

T

2

24 VOLT

TRANSFORMER

(BY OTHERS)

D

• Connect hot wire (A) of 120 volt circuit to terminal (H) and

transformer terminal (L1).

• Connect neutral wire ‘B’ of 120 volt circuit to terminal (N) and

transformer terminal (L2).

• Connect wire (C) from beginning of Burner circuit

(thermostat, gas valve, limits, etc.) to terminal (B).

• Connect wire (D) from end of Burner circuit to transformer 

terminal (T2).

• Connect wire (E) from transformer terminal (T1) to

terminal (C).

PS-801/851 with 24 Volt Burner Circuit with Red (Low Water) and
Green (Power) Lights

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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