Term
Honeywell Y Plan
HOT WATER ONLY
Method of operation |
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Definition
240V SUPPLIED TO PUMP AND BOILER VIA TIMER AND CYLINDER THERMOSTAT.
VALVE IS IN REST POSITION.
V goes no further than position 2b in micro switch 2 |
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Term
Honeywell Y Plan
C/H and H/W
Method of operation 1. |
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Definition
1. 240v supplied from timer and Room Thermostat.
Via WHITE WIRE and through position 1A of micro switch NO1 |
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Term
Honeywell Y Plan
C/H and H/W
Expected Voltages |
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Definition
ORANGE 240v
GREY 50-110v
WHITE 240v |
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Term
Honeywell Y Plan
Hot Water Only
Expected Voltages |
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Definition
Voltage expected : ORANGE 240v
GREY 0v
WHITE 0V |
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Term
Honeywell Y Plan
C/H Only
Expected Voltages |
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Definition
ORANGE 240v
Grey 240v
White 240v |
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Term
Honeywell Y Plan
C/H and H/W
Method of operation 2. |
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Definition
2.Valve begins to motoropen against tension of spring.
.Valve reaches mid position, lever on the spindle pushes micro switch NO1 to position 1b. |
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Term
Honeywell Y Plan
C/H and H/W
Method of operation 3. |
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Definition
3.Motor now receives reduced V, from small PCB within the valve.
PCB receives its voltage through micro switch NO2,internal loop connects its common with position 1A on micro switch No1 |
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Term
Honeywell Y Plan
C/H and H/W
Method of operation 4. |
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Definition
4.The reduced V is called BRAKE VOLTAGE
it allows the valve motor to stay in mid position against tension of the spring. |
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Term
Honeywell Y Plan
C/H ONLY
Method of operation 1. |
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Definition
240v is supplied down the GREY wire
Motor receives V, through position 1b on micro switch NO1.
and begins to motoropen fully against tension of the spring. |
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Term
Honeywell Y Plan
C/H ONLY
Method of operation 2. |
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Definition
C/H only 2.As valve begins to open a second lever on the spindle of the valve
moves the contacts on micro switch NO2 from position 2A to position 2B.
240v supplied to B and P from micro switch NO2 through Orange wire. |
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