IMPORTANT: Do not run high voltage ignition trans- former wires in the same conduit with the flame detector wiring.
5.For ignition installations in a contaminating environ- ment, use Honeywell Specification no. R1239001 High Ten- sion Ignition Cable or equivalent. This wire is very resistant to severe conditions of oil, heat, and corona, and is tested to withstand high voltages up to 25,000V rms in a salt bath for one minute without breakdown. It is rated at 200°F (93°C) for continuous duty and up to 350°F (75°C) for intermittent use.
Wiring Hookups
The typical wiring hookups in Fig. 2 and 3 show the internal line voltage schematic. Contact 3K2 closes when the controller calls for heat. 1K4 closes when prepurge is com- plete. 2K2 breaks and 2K3 makes when flame is proven. Also see the Operation section.
Fig. 2—Wiring hookup of gas system with interrupted ignition and intermittent pilot.
BURNER |
| 5 | MAIN FUEL |
|
8 | VALVE(S) |
| ||
MOTOR | 2K3 |
|
| |
|
|
| ||
AIR FLOW |
| 4 | IGNITION | 2 |
7 |
| |||
SWITCH | 2K2 |
|
| |
|
|
| ||
|
|
|
| |
| 6 | 3 | PILOT |
|
| VALVE |
| ||
|
| 1K4 |
| |
|
|
|
| |
|
| 3K2 |
|
|
TO FLAME | F |
|
|
|
DETECTOR |
| FLAME |
|
|
(FLAME ROD |
|
|
| |
| AMPLIFIER |
|
| |
OR UV |
|
|
| |
G |
|
|
| |
DETECTOR) | 1 | CONTROLLER |
| |
|
| 2 |
| 3 |
|
|
| LIMIT(S) | |
|
| R4795A |
|
|
|
|
| 1 |
|
|
| L2 | L1 |
|
|
| (HOT) |
| |
|
|
|
|
1POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2FOR INTERMITTENT IGNITION, CONNECT IGNITION TO TERMINAL 3.
3REFER TO SPECIFICATIONS SECTION FOR RECOMMENDED LIMITS.
M8682
R4795A
INSTALLATION
Fig. 3—Wiring hookup of oil system with interrupted ignition.
BURNER |
| 5 | 2ND STAGE | 4 |
8 | OIL VALVE(S) |
| ||
MOTOR | 2K3 |
|
| |
|
|
| ||
AIR FLOW |
| 4 | IGNITION | 2 |
7 |
| |||
SWITCH | 2K2 |
|
| |
|
|
| ||
|
|
|
| |
| 6 | 3 | 1ST STAGE | 3 |
|
| |||
| OIL VALVE(S) |
| ||
|
| 1K4 |
| |
|
|
|
| |
|
| 3K2 |
|
|
| F |
|
|
|
TO FLAME |
| FLAME |
|
|
DETECTOR |
|
|
| |
| AMPLIFIER |
|
| |
(PHOTOCELL |
|
|
| |
G |
|
|
| |
OR UV) | 1 | CONTROLLER |
| |
|
| 2 |
| 5 |
|
|
| LIMIT(S) | |
|
|
|
| |
|
| R4795A |
|
|
|
|
| 1 |
|
|
| L2 | L1 |
|
|
| (HOT) |
| |
|
|
|
|
1POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2FOR INTERMITTENT IGNITION,CONNECT IGNITION TO TERMINAL 3.
3IMMEDIATE OPENING OIL VALVE V4046B.
4OPTIONAL DELAYED OPENING OIL VALVE V4046A OR V4046B WITH ST70A ELECTRONIC TIME DELAY.
5REFER TO SPECIFICATIONS SECTION FOR RECOMMENDED LIMITS.
M8683
Retrofitting R4795
CAUTION
Make wiring connections as specified in Fig. 2, 3, or 4. Do not simply plug the R4795 into the old subbase without first changing the wiring at the subbase.
Observe the following when retrofitting the R4795:
1.Requires a line voltage controller capable of switching the entire connected electrical load.
2.Delayed opening oil valve may be retained but its delay is not necessary. Integral ST71A Purge Timer meets the intent of a delayed opening valve.
3.Refer to Fig. 2, 3 or 4 for proper wiring connections.
5 |