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open, to avoid dead heading the system pump. Additional isolation valves may also be open, based on the
value of "Min. # of Open Valves".
vi. As the cascade rotation functionality rotates which boiler fires first to satisfy a heat demand, the open limit
switch of the new boiler that will fire first must be open prior to closing the isolation valve of the previous
boiler that was in the sequence to fire first. In addition, if the value of "Min. # of Open Valves" is greater than
1, those valves will rotate and must also remain open prior to the previous isolation valves close.
8.D.11 Login
To navigate to the Login Screen, touch the Lock Icon on ANY screen.
The Login Screen allows the operator to make parameter adjustments based on the level of the login credentials.
See Section 8.B on page 64 for the passwords and the various Login levels.
FT
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