heat-timer MPCQ Platinum, Installation And Operation Instructions For

12 

Heat-Timer Corp.

Wiring to an Extension Panel

•   The MPCQ Platinum can control up to 8 stages solely.  

By adding a Heat-Timer Extension Panel using RS485 

cable, you can add an additional 8 boiler stages. A total 

of 2 Heat-Timer Extension Panels can be added to any 

single MPCQ Platinum totaling 24 boiler stages.

•   Each Extension Panel has 8 Lockout inputs that can 

be used by the MPCQ Platinum when sequencing the 
boilers.  Each Lockout controls one boiler regardless of 
the number of stages it has.

•   When the MPCQ Platinum is connected to an Extension 

Panel, you will be able to scroll through each of the 
boilers using the 

Adjust/Select

 Knob.

•   If a communication package is purchased with the 

MPCQ Platinum and the Extension Panel, the Internet 

will show the status of each boiler including the 

Extension Panel boilers.

•   No Output cards are required for the Extension Panel 

when used with the MPCQ Platinum.  You will need to 
install the proper relay for each of the stages needed.

•   To be able to set the extension panel stages in the 

MPCQ Platinum Startup menu, the extension must be 

powered and connected to the MPCQ platinum.  The 
MPCQ Platinum must then be re-powered up.

See Extension Panel documentation for additional wiring 

instructions.

MPCQ PLATINUM PANEL

Motherboard

CPU

EXTENSION PANEL 1

Connect to

RS485

Interconnect Cables

Flat Cable Connectors

plugs to RS485 terminals

on Back of Panel PCB board.

(Do not use RS485 on RI board)

Flat Cable Connectors

plugs to RS485 terminals

on Back of Panel PCB board.

RS485 for Remote

communication only

WIRING MPCQ PLATINUM TO MULTIPLE  EXTENSION PANELS

Connect to

RS485

EXTENSION PANEL 2

Wiring Extension Panel Lockout

•   Each Extension Panel has 8 Lockout inputs that can be used by the MPCQ Platinum when sequencing the boilers.

•   The first Lockout terminals on the first Extension panel will control the first MPCQ Platinum boiler, the boiler that has stage A as 

its first stage.  The second Lockout terminals on the first Extension panel will control the second MPCQ Platinum boiler.

•   When a boiler Lockout terminals are shorted, the MPCQ Platinum will de-energize that boiler stages.  In addition, it will omit that 

boiler from the sequencing process until those terminals are opened again.  The display will show 

L/O

 under that boiler stages 

indicating the Lockout Status.  I.e. If the MPCQ Platinum was controlling five 2-stage boilers (AB, CD, EF, GH (stages wired to 

MPCQ Platinum) and IJ (stages wired to the Extension)) and boiler AB and CD where energized at Hi.  Then if, the Extensions 

first lockout input was shorted, boiler AB stages 91st boiler) will de-energize immediately.  If any Lockout alarms were configured, 

a delivery will take place.  See Internet Alarms on page 34.

Connecting to the Internet

•   The MPCQ Platinum control comes either as a Standard without any communication 

or with Internet or BACnet communication.

•   Any MPCQ Platinum with Internet communication control package has an Internet 

Communication Board installed on the back of the main board.

•   Connect the Internet CAT5 Ethernet cable coming from the Internet Modem to 

the Internet RJ45 Communication socket on the back of the MPCQ Platinum 
communication board.

•   If the control is sharing the Internet connection with other computers, an Internet 

Router or Internet server must be used.  See Internet Setting on page 33.

•   If required, set the MPCQ Platinum Internet Settings as described on page 

33.

Internet Communiation 

Connection to Back of Control

Motherboard

CPU 
Board

BACnet or

Ethernet 

Communication

Board

Connect Ethernet

Cat-5 cable from

Internet modem

to RJ45 socket

Internet

Modem

or Router