User manual FIELD CONTROLS 02702600

[. . . ] Designed for draft settings from . 02" to . 08" inches of W. C. CONTROL LOCATIONS The control should be located as close as possible to a furnace or boiler and positioned as shown in Figure 1. It should be 18" from a stack switch and at least 18" from a combustible ceiling or wall. Do not locate in a room separated from the appliance. [. . . ] For proper settings and operation of the burner and the draft combustion testing instrumentation and draft gauges must be used. INSTALLATION AND ADJUSTMENT NOTE: See sections on control locations and collar installation. Insert the draft control into the collar. The front face of the control must be plumb. The pivot points must be level whether the control is on a horizontal, vertical, or sloping flue pipe. Use a spirit level, plumb and level accurately. Secure the control in the collar by tightening the clamping screws. If the collar is not supplied by Field, the control may be held in place by small bolts or sheet metal screws so located as not to interfere with the movement of the gate. When a sheet metal TEE is used instead of the collar, the B dimension must not be less than indicated for proper operation. The "B" dimension prevents the damper gate from obstructing the flue passage way. VERTICAL FLUES The control is shipped for installation in a vertical flue. The adjustment weight should be in the right hand slot when you face the control. (See Figure 3) HORIZONTAL FLUES For horizontal flues, remove the weight from the right hand slot and attach it to the left hand slot as shown in Figure 3. ADJUSTING THE CONTROL The burner must be running when the adjustment of the control is made. The use of a draft gauge is required to accurately set the over fire draft. Set the over fire draft according to the appliance manufactures installation instructions. Table 1 RC SIZE 4 5 6 7 B-DIMENSION 2 1/2 in. 2 5/8 in. Set the control to maintain as low a draft as will give good combustion and Figure 3 meet the requirements for heat. Turn the adjustment weight counter-clockwise to loosen, then slide in slot to the proper position and tighten. The bracket is marked 2, 4, 6 and 8, which indicates draft settings of . 02", . 04", etc. [. . . ] Close any check damper and open wide any internal damper. Usually a draft of -. 06" will be sufficient for cold weather, with reasonably quick pickup after a banked period. But if plant overheats, change to a lower draft setting. Raise the setting if there is not enough heat. [. . . ]