Install Instructions

MAINTENANCE
SCHEDULE:
• Inspect the water feeder annually. Replace it if it is worn, corroded, or if components no longer operate
properly.
• Replace the water feeder every 10 years. More frequent replacement may be required when severe
conditions exist such as rapid switch cycling and surging water levels.
• Disassemble and carefully clean strainer screen once per heating season.
STEP 4 - Troubleshooting
If the unit fails to feed water as required, perform the following diagnostic checks:
1. Recheck all wiring to ensure proper connections, as specified in these instructions.
2. Check to insure that the integral strainer is clean and free of debris and sediment.
3. Check to ensure proper operation of low water cut-off controls connected to water feeder.
STEP 3 - Testing
ITT
8200 N. Austin Ave.
Morton Grove, IL 60053
tel: [phone]
fax: [phone]
www.mcdonnellmiller.com
McDonnell & Miller
©2008 ITT Corporation
Printed in U.S.A. 10-08 211163
Dwell/Feed Switches
The unit is shipped with switch 2 ‘ON’ and all other switches on the ‘OFF’ position.
Switch Selection Guidelines
#1 – Should only be used with a float type LWCO such as the M&M Series 67.
#2 – Satisfactory for most residential steam boiler applications.
#3 – Shorter initial dwell period suggested for smaller 3 or 4 section boilers.
#4 – Longer initial dwell period suggested for a period of time immediately after initial boiler installation.
Switch Initial Initial Dwell/Feed
Position Dwell* Feed* Cycles
1 0 300 1
26060 5
3 30 270 1
4 120 180 1
Factory Setting
Position 2 - ON
O
N
1234
*Dwell/Feed Time in Seconds