Boost Mode; Vari Boost Curves - heat-timer MPC Platinum Installation And Operation Manual

BOOST MODE

Disabled, Manual, Vari, Vari+ESD
SELECT Settings/<System Settings>/<More Settings>/Boost
• The Boost quickly returns the building to comfortable ambient temperatures after the cooler
Night period.
• The MPC Platinum accomplishes this by either running the boiler on its limits or opening
the steam valve for a given Boost time based on the #1 Day schedule. See "Schedules" on
page 29.
• During the Boost heat period, the MPC Platinum does not run cycles. The prolonged heat
period allows ambient temperatures to rise rapidly.
• To disable the Boost for all the days, select Disable as the option.
•
the #2 Day program for any Day settings. See "Schedules" on page 29.
• There are three types of Boost:
1. Manual - This Boost begins at the #1 Day time, and lasts for a selected number of
minutes. The Manual Boost time is adjustable from 0 to 120 minutes. The Manual Boost
time does not adjust with outside temperature.
2. Vari - This boost begins earlier than the #1 Day time. The number of minutes before the
#1 Day time depends on the outside temperature and the Boost Adjustment Curve. A Vari
Boost curve of 0.1 gives the shortest Boost period, and a curve of 6.4 gives the longest
Boost period. The Vari Boost has a built in self-adjusting Warm-up time. The Warm-up
time accounts for the time length the heat source needs to reach the System Set Point.
The MPC Platinum adds the Warm-up to the Boost time.
3. Vari +ESD (Early ShutDown) - This Boost is typically only used in commercial or other
buildings where the building is unoccupied during the Night times. It follows the Vari
Boost described above. In addition, the MPC Platinum switches to the Night mode earlier
than the last Night setting for that day of the week. The warmer it is outside, the earlier
the MPC Platinum shifts to Night based on the Boost Adjustment Curve. See "Early
Shutdown Curves" on page 27.
• The Early Shutdown curve setting follows the Vari Boost setting. It cannot be set separately
from the Vari Boost curve.

VARI BOOST CURVES

Adjustable from 0.1 to 6.4
SELECT Settings/<System Settings>/<More Settings>/Boost/ Vari
• These curves determine the duration of the Boost in accordance with changes in outside
temperature.
• Vari Boost time increases with colder outdoor temperatures.
• The Warm-up period (below 0 minutes) represents a variable period of up to 45 minutes
during which time the heating system is warmed up prior to the Boost.
• The MPC Platinum determines the number of
based on a rolling average of its past experiences establishing heat for Vari Boost.
• The total Vari Boost time is equal to the time determined by the outdoor temperature and the
Boost curve plus the Warm-up time.
• The use of Internet controls adds space sensor installation capability. When Space Average
reaches the Day Space Target while the Space Lockout is enabled, the Vari Boost ends.
However, if the Space Average is below the Day Space Target before the #1 Day time, the
Vari Boost may continue for up to an additional hour after the #1 Day setting.
26
Default: Vari
#1 Day to **:** and use
Default: 3.0
MPC Platinum Installation and Operation Manual
--- BOOST MODE---
Disabled
Manual
Vari
Vari+ESD
- BOOST ADJUSTMENT -
Higher = More Boost
3.0
[
- BOOST ADJUSTMENT -
Higher = More Boost
0min
[
- BOOST ADJUSTMENT -
Higher = More Boost
3.0
[
]
]
]