22
Heat-Timer Corp.
System Run-On
Adjustable from 0 to 60 minutes
Default: 2 minute
SELECT
Settings/System Settings/System Run-On
• The System relay can control a combustion air damper. When the Outdoor
temperature increases 2°F above the Outdoor Cutoff after the last burner stage relay
has de-energized, the System relay will stay on for a period of time set by the System
Run-On. This allows the combustion air damper to bring fresh air into the building.
-- SYSTEM RUN-ON --
2m
[
]
Setback
(Available in Set Point Operating Mode Only)
Adjustable 0.0 psi to 10.0 psi
Default: 2.0 psi
SELECT
Settings/System Settings/More Settings/Setback
------ SETBACK ----
2.0 psi
[
]
• When in Set Point Operating Mode, the MPCQ Platinum has two heat levels. The Day Time setting is for when a building is
occupied and people are active. It follows that Day schedule. The Night Time settings hold a lower pressure set point when the
building is unoccupied and it will follow the Night schedule.
• The Night Time setting lowers the pressure of the system by the setback indicated. In other words, if the control is in Setback, the
MPCQ Platinum will subtract the value of the Night Setback setting from the Set Point setting and use the result as the new target.
Boost, Early Shutdown, and Boost Adjustment
(Available in Cycle Operating Mode Only)
Disabled, Manual, Vari, and Vari+ESD
Default: Vari
Manual Boost Adjustment: 0 to 120 minutes
Default:0 minutes
Vari Boost Adjustment: 0.1 to 6.4
Default:3
SELECT
Settings/System Settings/More Settings/Boost Mode
• The Morning Boost is designed to return the building to comfortable ambient
temperatures after the cooler Night (Save) period. The MPCQ Platinum will
accomplish this by holding a constant steam pressure for a given period based on the
Schedule Day #1 setting. See Schedules on page 26.
• If no boost is needed on a day of the week, simply DO NOT program the Day #1
setting, and use the Day #2 setting for any Day starting time.
• To set up the Morning Boost, you must select the type of Boost and its amount. There
are three types of Boost:
Manual
• This Boost begins at the Day #1 time, and lasts for as many minutes as set by the Boost
Adjustment. This type of Boost does not adjust with outside temperature and is not
affected by the space temperature.
--- BOOST MODE---
Disabled
Manual
Vari
Vari+ESD
- BOOST ADJUSTMENT -
Higher = More Boost
0min
[ ]
- BOOST ADJUSTMENT -
Higher = More Boost
3.0
[
]
Vari-Boost
• This boost begins earlier than the Day #1 time. The
colder the outdoor temperature, the earlier the Vari-
Boost will start. A Vari-Boost curve of 0.1 gives the
shortest Boost period, and a curve of 6.4 gives the
longest Boost period.
• If Space Lockout was enabled, the Vari-Boost can
extend up to an hour past the Day #1 schedule setting
trying to satisfy the Day Space Target.
• Whenever Vari-Boost is selected, it will have an added
15 minute Warm-up time. This accounts for the time
it takes for the boilers to establish pressure from a cold
start, and is automatically added to the Boost time. So
that, the total Boost period is equal to Boost time plus
the Warm-up time.
Outdoor Temperature in °F
55°
45°
35°
25°
15°
5°
-5°
-15°
-25°
50°
40°
30°
20°
10°
0°
-10°
-20°
0
45
90
135
180
Duration of Morning Boost in Minutes
1
2
3
4
5
6
Warm-up Prior to Morning Boost 0 to 45 Minutes
VARI BOOST
