Viessmann Vitocrossal 300, CU3A Quick Start Guide
Service Instructions
Please file in Service Binder
5673 650 - 01 04/2015
Please file in Service Binder
Vitocrossal 300 CU3A Quick Start Guide:
INSTRUCTIONS
for use by heating contractor
Vitocrossal 300
CU3A Series 26 to 57
Floor mounted, gas-fired condensing boiler with MatriX gas burner and Lambda Pro control
For operation with natural gas and liquid propane gas
Heating input 19 to 199 MBH
5.6 to 58 kW
VITOCROSSAL 300
Product may not be exactly as shown
IMPORTANT
Read and save these instructions
H
5673 649 - 01 04/2015
Installation Instructions
for use by heating contractor
Vitocrossal 300
CU3A Series 26 to 57
Floor mounted, gas-fired condensing boiler with MatriX gas burner and Lambda Pro control
For operation with natural gas and liquid propane gas
Heating input 19 to 199 MBH
5.6 to 58 kW
VITOCROSSAL 300
5673 648 - 01 04/2015
for future reference.
Product may not be exactly as shown
IMPORTANT
Read and save these instructions
for future reference.
H
Please file in Service Binder
Please file in Service Binder
FOR LPG CONVERSION DETAIL, SEE PAGES 14-15
FOR CODINGS, SEE PAGES 57-70
FOR TROUBLESHOOTING AND FAULT CODES, SEE PAGES 75-86
FOR WIRING DIAGRAM, SEE PAGES 94-95
FOR HEATING/DHW PUMP AND SENSOR WIRING, SEE PAGES 24-38
FOR SYSTEM LAYOUT, SEE PAGES 40-48
Operating Instructions
Vitocrossal 300
CU3A Series 26 to 57
Floor mounted, gas-fired condensing boiler with MatriX gas burner and Lambda Pro control
For operation with natural gas and liquid propane gas
Heating input 19 to 199 MBH
5.6 to 58 kW
VITOCROSSAL 300
With Vitotronic 200 KW6B Controls
H
Installation Instructions
for use by heating contractor
Mixing Valve Extension Module
for one heating circuit with mixing valve
Mixing Valve
Extension Module
Certified as a component
part for Viessmann boilers
5774 472 - 03 04/2015
WARNING
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Do not store or use gasoline or other
fl ammable liquids in the vicinity of this
or any other appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliances.
Do not touch any electrical switches,
do not use any phone in your building.
Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
If you cannot reach your gas supplier,
call the fi re department.
Installation and service must be
performed by a qualifi ed installer,
service agency or the gas supplier.
WARNING
Improper installation, adjustment, and/
or operation could cause carbon monoxide
poisoning resulting in injury or loss of life.
This product must be installed and serviced
by a professional service technician who is
experienced and qualified in hot water boiler
installation and gas combustion.
Product may not be exactly as shown
IMPORTANT
Read and save these instructions
for future reference.
Product may not be exactly as shown
IMPORTANT
Read and save these instructions
for future reference.
FOR PROGRAMMING, SEE PAGES 11-33
QUICK START GUIDE
FOR PUMP AND SENSOR WIRING, SEE PAGE 8
VITOCROSSAL 300, CU3A
For the latest updates on the Quick Start Guide, please visit
9442120 05 / 2015
UNCOMPROMISE.US
UNCOMPROMISE.US
Vitocrossal 300 CU3A Quick Start Guide:
VITOCROSSAL CU3A QUICK START GUIDE
ABOUT THIS QUICK START GUIDE: The programming and wiring recommendations in this guide are
intended to enable immediate initial service under the most common conditions; they are not intended to be a
substitute for detailed, site-specific set-up and commissioning. Only for use by trained, licensed heating contractor.
SEE THE INSTALLATION AND SERVICE INSTRUCTIONS FOR IMPORTANT SAFETY INFORMATION.
BEFORE BEGINNING THE QUICK START PROCESS:
1. Verify that power (120/1/60 wth earth ground, properly polarized) is supplied to the #4 0
connections on the POWER /PUMP INTERFACE and MIXING CONTROL, if used.
2. Verify that the fuel gas supply is available (4”-14”WC Nat, 10”-14”WC LPG) and that air has been purged from the piping.
3. Verify boiler/system water fill and purge.
4. Verify proper venting and combustion air supply.
ACCESS TO THE CU3A WIRING:
BOILER
CONTROL
REMOVE FASTENERS 1 - 6
Remove fastners
in order.
1.
FOR HEATING ONLY:
CONNECT #1 OUTDOOR SENSOR TO SCREW
TERMINALS X3, 1 + 2 ON BOILER CONTROL
USE #20 ON THE POWER/PUMP INTERFACE
TO POWER SINGLE-ZONE HEATING PUMP
DIRECTLY. ON ZONED SYSTEMS, USE #20
TO POWER ZR (REMOVE ZC-ZR JUMPER)
ON SWITCHING RELAY PROVIDED BY
OTHERS
TO ADD DOMESTIC HOT WATER:
CONNECT THE #5 DHW SENSOR TO THE RED
#5 PLUGS ON THE BOILER CONTROL. DHW
OPERATION WILL BE AUTO-ENABLED IN THE
CONTROL PROGRAM.
USE A SEPARATE DHW PUMP; POWER IT
WITH #21 ON THE POWER/PUMP INTERFACE
WIRING CONNECTIONS
BOILER CONTROL
POWER/PUMP INTERFACE
EA1 EXTENSION
POWER/PUMP INTERFACE
TO ADD A MIXING VALVE:
CONNECT THE PURPLE #145 ON THE MIXING
VALVE EXTENSION TO THE #145 KM BUS
ON THE BOILER’S EA1 EXTENSION USING
18/2 WIRE
CONNECT THE #2 SUPPLY SENSOR TO #2 ON
THE MIXING VALVE EXTENSION. CONNECT
THE MIXING VALVE MOTOR TO #52 ON THE
MIXING VALVE EXTENSION
POWER THE MIXING PUMP WITH #20 ON
THE MIXNG VALVE EXTENSION
BOILER CONTROL
EA1 EXTENSION MIXING VALVE EXTENSION
POWER/PUMP INTERFACE
(OPTIONAL)
Loading...