| ID | ITEM | QUESTION | ANSWER |
| 1 | Edwards Parts | What happens if I tighten to packing nut in the bonnet to tight? | Stem will jam, operator will fail. |
| 2 | Edwards Parts | What is the best thermostat for 2 wire operator? | Simple, heating only thermostat. |
| 4 | Edwards Parts | What is the difference between a 2 wire and 3 wire operator? | 2 wire operator has hot and signal wire. 3 wire has common and terminal and common and terminal for closed. Needs single pull double throw thermostat action to make operator work (Series 90). 2 wire use single pull thermostat. |
| 5 | Edwards Parts | Which is better - 2 wire or 3 wire? | Has to do with the heating systems designed over the years. Both operate similarly. |
| 6 | Edwards Parts | The Stem and bonnet is too tight? | This is usually a manufacturing defect. |
| 7 | Edwards Parts | My operator will open but it will not close? | You will most likely have to replace the whole operator. |
| 9 | Bonnets | Are you able to get a valve body with a female bonnet? | Female Bonnets are sold seperatly, but they are not sold with a valve body. |
| 10 | Motors | What is the correct motor for a 3 wire mercury operator? | V-605 motor |
| 11 | Operator Testing | I have voltage drops with my Operator? | You must verify that the control transformer is providing 24V - AC. You must disconect stat wiring and jump test operator to verify correct operation. At this point if voltage drops are still apparent, then your problem is in your stat wiring. |
| 12 | Operator | What wires are the 24 volt operator attached too? | 24 volt power goes to number 1 and number 3, number two is the end switch utlized to energize burner system. |
| 13 | Operator | Which wire does the thermostat hook up to? | four, five, and six on the 3 wire operator. Five to four opens the valve. Five to six closes the valve. |
| 14 | Operator | What thermostat do I use for the 3 wire operator? | Honeywell, Johnson, or any 3 wire low voltage thermostat will work. |
| 15 | End Caps | What material are the radiator end caps made of? | Plastic |
| 16 | Boiler | I have an older edwards boiler from the 1960's , is there any water treament that is suggested for this unit. | |
| 17 | Stems | Why does the electric actuator turn the cam and push the stem down and the stem jams and stops and will not allow the acuator to turn anymore. | The stem is too long. |
| 18 | Pump | Why is my C-322 Pump is leaking? | The spring coupling needs to be seated in such a way that it pulls both motor and pump shafts together to create a good seal and avoid pump leaking. You may require a C-314 pump coupling that is shorter. |
| 19 | Bonnet | What seals do I need replace for a leaky bonnet for 1" Pipe? | You can replace V666 which is the Gasket - V630 which is packing nut inside the bonet - 632 which is a O Ring inside the Bonnet or you can buy the V-639 - Bonnet which is the whole bonnet or the V-687 which is the complete body assembly |
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