Xylem MM 209D Series 6667 Replacement Mechanism - Manual (Page 2)

2
a. See figure 1. Turn off all electrical power to the boiler. (There may be more than one power
source to the boiler). Bleed off all pressure and let the boiler cool down to 80˚F (27˚C).
Drain water level in boiler down below the control. Remove screw (A) and cover (B). Tag all
wires for reconnection later. Disconnect wires from the terminals and remove conduit con-
nection from housing (C). Remove two (2) screws (D) and switch housing (C).Remove four
(4) screws (E) and remove switch (F). Remove four (4) screws (G) and bracket (H).
Remove four (4) screws (J) and ring (K). The float and bellows assembly (L) can now be
removed. Clean the gasket surface and mount the new float and bellows assembly.
b. Disassemble the new 6667 by removing screw (A) and cover (B). Remove the two (2) nuts
on the back side of screws (D) and pull the assembly apart.
STEP 1 - Preparation
STEP 2 - Installation on 61, 67, 767, 70, and 70-B
For installing in a 69 Series see Step 3
a. See figure 1. Slip gasket (M) over float (L) and slide into body. Make sure that word TOP on
the bellow base is at the top. Align the holes in gasket (M) with holes in the body, float and
bellows assembly (L) and ring (K). Using four (4) screws (J) attach (L) and (K) to the body.
Attach bracket (H) using four (4) screws (G) to ring (K) and body. Install switch (F) into
bracket (H), making sure that the yoke on the switch fits around the roller in float and bel-
lows assembly (L) and that the word TOP on the switch is at the top. Attach with four (4)
screws (E). Attach housing (C) using two (2) screws (D). Install conduit connector and
reconnect wires to their proper terminals. Install cover (B) using screw (A).
E
L
J
F
C B D
G
H
M K J
G
E
D
A
Figure 1