WIRING CONT.
DIAGRAM FOR BOILER WITH TANKLESS DOMESTIC COIL
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| 24 VAC | Fig. 5a & 6a Diagram for |
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| HIGH LIMIT | ||
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TYPE 668 OIL |
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| TYPE 668 OIL |
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| BURNER CONTROL | |
BURNER CONTROL |
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THERMOSTAT |
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| THERMOSTAT |
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| X | X |
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| IGNITION |
| HOT | LINE |
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| IGNITION | ||
| HOT | LINE | N |
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| N |
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T | T |
| X | X |
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| X | X | BURNER | |
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| BURNER |
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| 2 |
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| MOTOR |
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| 4 |
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| 5 |
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| CIRCULATOR |
| 5 |
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| CIRCULATOR |
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| MOTOR |
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FIELD |
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| FIELD |
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INSTALLED |
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| INSTALLED |
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| HIGH | LOW | CIRCULATOR | ||
JUMPERS |
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| HIGH | TYPE | LOW | TYPE 11B05 | JUMPERS |
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| CONTROL | LIMIT | CONTROL | |||||||
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| LIMIT | 11B30 | LIMIT | CIRCULATOR |
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| CONTROL |
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Fig. 5 Diagram for System using High
Fig. 6 Diagram for System using High Limit control and Low
The low limit control maintains domestic hot water at desired temperature
When the thermostat calls for heat, the burner starts. The circulator also starts if boiler temperature is above setting of circulator control.
If excessive boiler temperature causes high limit to open,
the circulator continues to run but the burner shuts down until the high limit recloses.
When low boiler temperature causes the circulator control to open, burner stays on but the circulator stops until the circulator control recloses. When thermostat is satisfied, the circulator stops. The burner also shuts down if boiler temperature is above setting of low limit control.
DIAGRAM FOR MULTIZONE HYDRONIC HEATING SYSTEM
THERMOSTAT
THERMOSTATZONE 1
ZONE 2
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T T |
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| ZC |
1 |
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| 2 |
| ZR |
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3 |
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JUMPER | 4 |
| B1 |
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| *CIRCULATOR | B2 |
5 | 6 | ZONE 2 |
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| C2 |
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Fig. 7 |
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TO ADDITIONAL
FOR OTHER ZONES
TO BURNER
TO CIRCULATOR ZONE 1
HOT
LINE
N
*Terminal No. 4 or No. 6 may go to zone 2,
The other terminal then goes to ZR.
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