heat-timer Multi-MOD Platinum Installation And Operation Manual page 28

• The cards come pre-installed on the back of the Multi-MOD's main board .
Extension Modules do not come with Modulating Output Cards . The cards
must be purchase separately .
• Select the current or voltage output cards output signal to match the
burner modulation signal .
MODulATING MODe
Normal, Parallel
PReSS TO SeleCT: /<System Startup>/ Sensor Type/.../Output Type A&B/ Modulating Mode
• Condensing boilers maximize their efficiency at lower modulation . It is
preferred to run these boilers using the Parallel mode .
• The Parallel option runs multiple boilers at lower firing rate instead of a
single boiler at higher firing rate .
• The Normal modulation is designed to operate non-condensing boilers .
These are normally burners with high turndown ratios .
OPeRATING MODe
(Available with Normal Modulating Mode Only)
Normal, Process
PReSS TO SeleCT: /<System Startup>/ Sensor Type/.../ Modulating Mode/ Operating Mode
• Normal Operating Mode uses PID logic to modulate the stages . It is
designed for slow responding applications as in building heating .
• Select Process when the system is required to keep a tight set point
control while experiencing sudden big changes in the load as in some
processing applications . Note that big load changes may cause stages to
short cycle .
• To adjust the system response, use the Gain . See "Gain" on page 36 .
HeAT/COOl MODe
Heat, Cool
PReSS TO SeleCT: /<System Startup>/ Sensor Type/.../ Operating Mode/ Heat-Cool Mode
• The Multi-MOD Platinum can operate in heating or in cooling applications .
In Heating, the Multi-MOD Platinum will modulate stages when the
system is below the set point . In addition, the system relay will energize
when the outdoor temperature is at or below the Outdoor Cutoff setting .
• In Cooling, the Multi-MOD Platinum will modulate stages when the system
is above the set point . In addition, the system relay will energize when
the outdoor temperature is at or above the Outdoor Cutoff setting .
PROVe/DHW MODe
Prove, DHW No Priority, DHW with Priority
PReSS TO SeleCT: /<System Startup>/ Sensor Type/.../ Heat-Cool Mode/Prove-DHW
• The Prove option is used to check on system components before starting
any stage . One of its common uses is to connect the Prove input to a
flow switch to prevent boilers from firing during no flow . The Multi-MOD
Platinum will not start any boiler stage unless the Prove/DHW input
(terminals A9 and A10) are shorted . The Prove status has no effect on
System output . See "Prove Wiring" on page 19 .
28
Multi-MOD Platinum with Space and Scheduling Installation and Operation Manual
The modulating burner signal
must match the output card
and Output Type setting .
-MODULATING MODE -
Default: Normal
Normal
Parallel
-OPERATING MODE -
Normal
Default: Normal
Process
---- HEAT/COOL ----
Default: Heat
Heat
Cool
------ Prove/DHW ------
Default: Prove
Prove
DHW No Priority
DHW With Priority
DHW Using System
WARNING