Boiler Supply - Weil-McLain Aqua Balance WMB-155 Manual

W
TM
AquaBalance
3 Prepare boiler
Figure 6
Install pipe fittings for relief valve and pressure/
temperature gauge —
valve until AFTER hydrostatic testing
legend below)
1

Boiler Supply

(outlet)
1. Boiler Supply (outlet) connection, (male, 1" NPT
2. Boiler Return (inlet) connection, (male, 1" NPT
Recommend Near Boiler Piping to be 1-1/4" NPT or larger for WMB-155. Bushing 1" x 1-1/4" NPT at Supply (outlet) and Return
(field supplied by installer )
(inlet) not shown.
3. Boiler relief valve, shipped loose with boiler — DO NOT mount relief valve until AFTER hydrostatic testing.
3a. TEMPORARILY ONLY — Insert a ¾" NPT plug in the relief valve tapping of the reducing tee. This MUST BE REMOVED
after the test and the relief valve mounted here.
4. Pressure/temperature gauge, (field supplied) by installer, (Optional – can use boiler gauge).
5a. Reducing tee, 1" x 1" x ¼" on WMB-80/120, NPT, 1
5b. Tee, NPT, 1" x 1" x ¾" on WMB-80/120, NPT, 1
6. Nipple, NPT, 1" x close on WMB-80/120, NPT, 1
7. Nipple, NPT, 1" x close on WMB-80/120, NPT, 1
8. Isolation valve on supply connection, (field supplied) by installer (1" NPT
9. Isolation valve on return connection, (field supplied) by installer (1" NPT
10. ¾" NPT boiler drain valve, (field supplied) by installer — after hydrostatic testing, move drain valve to lowest point on the return piping
if not already there.
Part number 550-100-305/0118
M -
ALL OUNT GAS FIRED WATER BOILER
continued
DO NOT mount relief
(see
2
Boiler Return
3
10
(inlet)
on WMB-80/120, 1" NPT on WMB-155).
on WMB-80/120, 1" NPT on WMB-155).
" x 1
-1/4
" x 1
-1/4 -1/4
" x close on WMB-155 (field supplied) by installer.
-1/4
" x close on WMB-155 (field supplied) by installer.
-1/4
—
Boiler Manual
Figure 7
" x ¼" on WMB-155 (field supplied) by installer .
-1/4
" x ¾" on WMB-155 (field supplied) by installer.
on WMB-80/120, 1-1/4" NPT on WMB-155).
on WMB-80/120, 1-1/4" NPT on WMB-155).
Install piping components required for
hydrostatic test (
see legend below)
11