fit and protects the grilles. After dimensions are checked, the location of the grille and thickness of the mortar joints determined, the
dry course of brick can be taken up and laid permanent with mortar. (See Figure 4.)
Step 5:
With this start, proceed with the masonry in the regular way. Keep in mind:
1.
Glass wool insulation around the Circulator Unit.
2.
The concealed joint at fireplace opening.
3.
The cold air intake and warm air outlets must be planned for and located in the masonry and
must be separated by masonry or ducts.
4.
All weight of the chimney must be supported by the masonry and not on the Circulator Unit.
5.
When the top of the fireplace opening is reached, use a metal lintel of adequate strength to
support the masonry work above. Set the lintel low enough to conceal the metal apron of the
Circulator Unit. Pack loosely generous quantities of insulation behind and at the end of the
lintel. (See Figure 5).
Fig. 5: Setting the lintel
Step 6:
Plan the location of the warm air outlet grille in the same manner as the cold air intake. The outlet
grille must be a minimum of 6” below the ceiling or mantle or any projecting combustible surface. For
projecting or corner installations the side of the grille must be a minimum of 6” from a combustible wall.
The outlet grille must be mounted with the louvres pointed down. A combustible mantle must be at least
32” above the fireplace opening.
Fig. 6: Air Outlets may be above
mantel
Step 7:
When the face of the fireplace has been built up to desired height, start
corbelling the masonry back to meet the dome of the smoke chamber and the flue lining. Be sure the smoke
chamber is covered with insulation. See that tight connection is made to the flue lining and that plenty of
insulation is packed loosely around the place where the flue lining meets the smoke chamber. Do not allow the
flue lining to rest on the Circulator; the lining must be supported by the chimney masonry. (See Figure 7.)
Refer to NFPA 211 for proper masonry chimney construction and clearances.
Fig. 7: Brick should be corbelled
to support chimney
Step 8:
Finish the chimney in the normal way. In some construction, the flue from other heating apparatus is
incorporated in the same chimney. If this is the case, keep the flue well back into a corner so as not to
interfere with the air intakes and warm air outlets.
If the chimney is close to trees, or high hills, a chimney hood or cap may be desirable to prevent downdrafts.
If a chimney hood is used, the opening underneath the hood must be equal to, or preferably greater than, the
total area of all flues incorporated in the chimney. (See Figure 8.) NOTE: Before leaving the job, try the damper
to make sure it opens wide and closes tight. It may be necessary to clean out fallen mortar. Leave the valve
plate wide open to circulate air up the chimney. This helps to cure the masonry. Do not build a fire in the
fireplace for several days, allowing time for the masonry to cure thoroughly.
Fig. 8: Chimney may be hooded
if desired.
Easily Controlled Damper
The poker control handle pulls forward to open the valve plate, back to close. The handle is
designed to hold the valve plate securely in any desired position. Friction is made on the handle
by tightening the grip nut at bolt ‘A.” The poker control handle should move freely but with
enough tension for positive positioning. Tension is correctly set at factory. During shipment, the
nuts at bolt “A” and bolt “B” could possibly loosen and require readjustment.
If after years of usage it should become necessary to clean out the chimney flue and smoke
shelf, the valve plate of the Vestal Circulator can be removed. Remove the poker control handle
by taking loose bolts “A: and “B.” Slide the valve plate to the left until it stops, then push the
right end of the valve plate to the back of the unit until it is free of its hinges. Proceed to work
the valve plate down through the throat opening. Due to oversize design of the valve plate it is a
close fit, both the valve plate will come out by manipulating through the throat opening. The
valve plate is replaced by reversing the above procedure. (See Figure 9)
Fig. 9: Built
−
in damper operates easily
