13 of 20
150 and 250 MBH Panels
1. Close V3. Open valves 1, 2, 4.
2. Open the black cap on A1 two full turns.
3. Attach fill hose to D2 and begin filling.
a. Water will push air slugs into boiler.
b. Allow system to pressurize to
approximately 20 psi.
4. Close V1.
5. Open D1 50% to drain water/air from boiler.
6. Close D1 and allow to pressurize.
7. Close V4
8. Open V1.
9. Slowly open V3.
V1
A1
V2
V4
D1
D2
V3
All configurations must include manifold
vent/purge assemblies. Failure to do so may result in
complications purging.
NOTICE
10. Slowly open purge valve at manifold until water/air
begin flowing. Remain at this position until flow is
water only.
11. Close manifold purge valve and D2 and replace
cap(s). Air remains in return line from manifold.
12. Open V4.
13. Close D2 and disconnect fill hose and attach to D1.
14. Slowly open D1 and allow system pressure to
stabilize to approximately 15 psi.
Continued on next page
System Commissioning and Maintenance
