Install Instructions

ManualsBrandsMcdonnell & Miller ManualsHeating Supplies847-C-2, Make-Up Water Feeder w/ No. 2 Switch, w/ Alternate Valve Orientation

1

2

3

3

INSTALLATION –

TOOLS NEEDED:

One (1) pipe wrench and one (1) socket wrench.

STEP 1 - Preparation

A

Drain the water in the receiving tank to a level

which is below the control opening (A). Allow the

boiler to cool to 80˚F (27˚C) and allow the

pressure to release to 0 psi (0 bar).

C

D

Use a socket wrench to secure the feeder (D)

to the receiver tank with the six

3

/8” - 16

bolts through mounting flange (C) and

tighten to 18 ft•lb (24 N•m).

STEP 2 - Install the Control Unit

Mounting Flange Dimensions

B.C.

O.D.

Float

O.D. B.C. C D Diameter

6

11

⁄16 (170) 5

3

⁄4 (146) 6

7

⁄16 (11.1) 4

3

⁄4 (121)

Series 851, 851-S and 847

Dimensions, in. (mm)

“C” - number of mounting holes

“D” - size of mounting holes