Xylem MM 209D User Manual

Series 6667 Replacement

!

Mechanism

Model 6667 on 120 VAC or 24 VAC Systems

Model 6667MV on Millivolt or 24 VAC Systems

Used on Series 61, 67, 69, 767, 70, and 70-B
Low Water Cut-offs

OPERATION

Maximum Steam Pressure: 20 psi

INSTRUCTION MANUAL

MM-209D

Electrical Ratings

Voltage Full Load Locked Rotor Pilot Duty

120 VAC 7.4 44.4 125 VA at
240 VAC 3.7 22.2 120 or 240 VAC

57.5 VA at

120 or 240 VDC

On D.C. Service be sure to connect (+) positive
wire to terminal marked (2).

CAUTION

WARNING

• Before using product, read and understand instructions.

• Save these instructions for future reference.

• All work must be performed by qualified personnel trained in the proper application,
installation, and maintenance of plumbing and electrical equipment and/or systems in
accordance with all applicable codes and ordinances.

WARNING

Series 6667

®

Approved

• To prevent electrical shock, turn off the electrical power before making electrical
connections.

• To prevent serious burns bleed off all pressure and let boiler cool down to 80˚F (27˚C).

• Drain water level down below the control before taking the control out of the boiler.

Failure to follow this warning could cause property damage, personal injury or death.

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 con­nection 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 bel­lows 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