WeilMcLain-gv90plus-user-manual

Part number 550-142-055/0411
GV90+ gas-fired water boiler — User’s Information Manual
12
Operating instructions
Before attempting to start the boiler, check the boiler pressure temperature gauge. If boiler and system are full
of water and properly pressurized, the gauge should read at least 12 psig on most systems. Operating the boiler without
proper water content will damage boiler and controls and could result in severe personal injury, death or substantial
property damage.
Figure 5 Operating instructions