MPC Platinum Installation and Operation Manual
25
HT# 059085-00 F
2. Have another person located at the furthest radiator (in terms of longest piping distance)
or to a radiator in a location known to get heat last.
3. Manually, switch the control to Bypass.
4. When the last radiator is hot, record the System temperature (displayed next to SYS on the
fourth line of the main display).
5. Set the System Set Point to the temperature noted in Step 4.
6. Switch the control back to Auto operation.
ALERT
The System Set Point must be set correctly, as described above. Otherwise, the MPC
Platinum may consistently under or overheat the building, especially in mild weather
when fuel savings should be the greatest.
ALERT
The Heat Establish period cannot
exceed six hours. If during the
Heat Establishing period the
HSS does not reach the Set
Point, the Cycle-ON will start
after six hours of Heat Establish.
SYSTEM DIFFERENTIAL
(Available in Burner or Valve Operation Mode Only)
Adjustable from 3°F/2°C to 75°F/42°C Default: 25°F/14°C
SELECT Settings/<System Settings>/<More Settings>/Sys Diff
• The System Differential is the temperature range through which the HSS must fall below
the System Set Point before another cycle can begin.
• The selected starting value for the System Differential depends on the value of the System
Set Point. The higher the System Set Point, the higher the Differential value can be set.
• As an initial setting, set the heating system to restart at approximately 125 °F. At this
temperature most of the residual heat in the radiators has dissipated, but enough heat
remains to keep the ambient temperatures warm during the time it takes the MPC Platinum
to establish heat.
• For example, if the System Set Point is 170°F, then set the Differential to 45°F, so the
Set Point less the Differential is 125°F. If the System Set Point is 140°F, then set the
Differential to 15°F.
• If the space temperature becomes too cold between cycles, reduce the amount of the System
Differential.
• If the building is overheating, especially in mild weather, check the System Set Point. If the
System Set Point setting is correct, then increase the System Differential. See "System Set
Point" on page 24.
SYSTEM SENSOR DIFF
25
F
[
]
DISTRICT STEAM DELAY
(Available in District Steam Operation Mode Only)
Adjustable from 0 to 30 minutes Default: 15 minutes
SELECT Settings/<System Settings>/<More Settings>/Dist Steam Dly
• In most district steam applications, the condensed steam is not recycled back. In these
applications, use District Steam as the Operating Mode. See "Operation Mode" on page 20.
• The MPC Platinum uses this time setting to determine the beginning of the steam cycle.
• No system sensor is required in the District Steam mode.
• Since no system temperature is used, no energy saving Thermal Lockout is available.
• To nd the appropriate District Steam Delay for your building, use the following procedure:
1. Turn the heating system off and wait until the radiators are cool.
2. Have another person located at the furthest radiator (in terms of longest piping distance)
or to a radiator in a location known to get heat last.
3. Manually, switch the control to Bypass. At the same time start to count the time.
4. Wait until the radiator begins to get warm. Then record the amount of elapsed time.
5. Set the District Steam Delay to the time noted in Step 4.
6. Switch the control back to Auto operation.
DISTRICT STEAM DELAY
15min
[
]
ALERT
No Thermal Lockout is
available with District Steam.
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