Lochinvar 2072, 402 User Manual

CFX-CHX-SER Rev A

Copper-fin II/IIE

Boiler and Water

Heater

Service Manual

Models: 402 - 2072

 WARNING

Save this manual for future reference.

This manual must only be used
by a qualified heating installer
/ service technician. Read all
instructions, including this
manual and the Installation
and Operation Manual, before
installing. Perform steps in the
order given. Failure to comply
could result in severe personal
injury, death, or substantial
property damage.

Contents

CONTENTS ........................................................................ 2

Hazard Definitions .............................................................. 2

PLEASE READ BEFORE PROCEEDING ........................ 3

Handling Ceramic Fiber Materials ...................................... 3

When servicing appliance ............................................. 3

Appliance operation ..................................................... 3

Appliance water ............................................................ 3

WHAT IS IN THIS MANUAL .............................................. 4

1. SERVICE

The Copper-fin Display ...................................................... 5

Control Inputs ............................................................... 6

Control Outputs ............................................................. 7

General Operation ........................................................ 8

Sequence of Operation ................................................. 9-10

Display Panel Menu Access ............................................ 11

Display Panel Parameter Access ..................................... 12

Parameter Table A - Boiler Operation ........................ 13-14

Parameter Table B - Water Heater Operation ............ 15-16

Viewable and Changeable Control Parameters .......... 17-24

Hazard definitions

2. MAINTENANCE

Maintenance and Annual Startup ................................ 25-32

3. TROUBLESHOOTING

Before Troubleshooting .................................................... 33

Check Control Module Fuses .......................................... 33

Table 3A - Troubleshooting Chart - No Display ............... 34

Checking Temperature Sensors ...................................... 35

Table 3D - Troubleshooting Chart - Noisy System .......... 36

Table 3E - Troubleshooting Chart - Fault Messages .. 37-43

Revision Notes .................................................. Back Cover

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels
or to important information concerning the life of the product.

 DANGER

 WARNING

 CAUTION

CAUTION

NOTICE

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious
injury.

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.

NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
related to personal injury or property damage.

2

Copper-fin II/IIE Boiler and Water Heater Service Manual

Please read before proceeding

 WARNING

NOTICE

Installer – Read all instructions, including
this manual and the Installation and
Operation Manual, before installing.
Perform steps in the order given.

User – This manual is for use only by a
qualified heating installer/service technician.
Refer to the User’s Information Manual for
your reference.

Have this appliance serviced/inspected by a
qualified service technician at least annually.

Failure to comply with the above could
result in severe personal injury, death or
substantial property damage.

When calling or writing about the appliance
– Please have the appliance model and serial
number from the appliance’s rating plate.

Consider piping and installation when
determining appliance location (see the
Installation and Operation Manual).

Any claims for damage or shortage in
shipment must be filed immediately
against the transportation company by the
consignee.

When servicing appliance –

• To avoid electric shock, disconnect electrical supply
before performing maintenance.

• To avoid severe burns, allow appliance to cool before
performing maintenance.

Appliance operation –

• Do not block flow of combustion or ventilation air to
the appliance.

• Should overheating occur or gas supply fail to shut off,
do not turn off or disconnect electrical supply to
circulator. Instead, shut off the gas supply at a location
external to the appliance.

• Do not use this appliance if any part has been under water.
The possible damage to a flooded appliance can be
extensive and present numerous safety hazards. Any
appliance that has been under water must be replaced.

Appliance water –

• Thoroughly flush the system (without appliance
connected) to remove sediment. The high-efficiency
heat exchanger can be damaged by build-up or
corrosion due to sediment.

• Do not use petroleum-based cleaning or sealing
compounds in the appliance system. Gaskets and seals in
the system may be damaged. This can result in
substantial property damage.

• Do not use “homemade cures” or “appliance patent
medicines”. Serious damage to the appliance, personnel,
and/or property may result.

Handling ceramic fiber materials

REMOVAL OF COMBUSTION CHAMBER LINING

 WARNING

The combustion chamber insulation in this
appliance contains ceramic fiber material.
Ceramic fibers can be converted to cristobalite
in very high temperature applications.
The International Agency for Research on
Cancer (IARC) has concluded, “Crystalline
silica in the form of quartz or cristobalite
from occupational sources is carcinogenic
to humans (Group 1).” Normal operating
temperatures in this appliance are below the
level to convert ceramic fibers to cristobalite.
Abnormal operating conditions would have
to be created to convert the ceramic fibers in
this appliance to cristobalite.

The ceramic fiber material used in this
appliance is an irritant; when handling
or replacing the ceramic materials it is
advisable that the installer follow these safety
guidelines.

Avoid breathing dust and contact with

skin and eyes.

• Use NIOSH certified dust respirator (N95).

• Wear long-sleeved, loose fitting clothing, gloves, and eye

Apply enough water to the combustion chamber lining to

 Remove the combustion chamber lining from the appliance

 Wash potentially contaminated clothes separately from

NIOSH stated First Aid.

 Eye: Irrigate immediately.
 Breathing: Fresh air.

This type of respirator is based on the OSHA
requirements for cristobalite at the time this
document was written. Other types of respirators may
be needed depending on the job site conditions.
Current NIOSH recommendations can be found on
the NIOSH website at http://www.cdc.gov/niosh/
homepage.html. NIOSH approved respirators,
manufacturers, and phone numbers are also listed on this
website.

protection.

prevent airborne dust.

and place it in a plastic bag for disposal.

other clothing. Rinse clothes washer thoroughly.

3

Copper-fin II/IIE Boiler and Water Heater Service Manual

What is in this manual?

Service

The Copper-fin display

• Display panel readout, buttons and their functions

Control module inputs

• Control module inputs and options

Control module outputs

• Control module outputs and options

General

• How the appliance operates

• How the control module operates

• Access modes -- user and installer

• Sequence of operation -- Domestic Hot Water
(DHW)/space heating

Control panel menu access

• Accessing programming mode and locating menus
(See separate guides covering the ModBus and PC interfaces)

Control panel parameter access

• Accessing and changing parameters from the display panel

Quick start information -- parameter tables

• An index of available adjustments and readouts, where to
access them and where to find detailed information.

Copper-fin boiler operation (pages 13 - 14)

Maintenance

• Service and maintenance schedules

• Address reported problems

• Inspect appliance area and appliance interior

• Check all piping for leaks

• Flue vent system and air piping

• Combustion air filter

• Check water system

• Check expansion tank

• Check relief valve

• Check igniter

• Check all appliance wiring

• Flame inspection

• Check flue gas passageways

• Inspect and clean burner

• Checking combustion air pressure

• Checking manifold gas pressure

• Cleaning heat exchanger

• Review with owner

Troubleshooting

• Troubleshooting table - No display

• Checking temperature sensors

• Troubleshooting table - Noisy system

• Troubleshooting table - Fault messages displayed on
Operator Interface

• A: General

• B: Temperature Settings

• C: Data Logging

• D: Functions

• E: DHW Settings

• F: Outdoor Air Reset

• G: Anti-cycling

• H: Control Modes

• I: Cascade

• J: Building Management System (BMS)

• K: Pumps

• L: Service Notification

Copper-fin water heater operation (pages

15 - 16)

• A: General

• B: Temperature Settings

• C: Data Logging

• D: Functions

• E: DHW Settings

• F: Anti-cycling

• G: Control Modes

• H: Cascade

• I: Building Management System (BMS)

• J: Pumps

• K: Service Notification

4

1 Service

The Copper-fin display

• Hold 5 seconds to enter code
Input Mode (Menu Mode)

• Press to move up one level
in Menu Mode or to exit
Menu Mode

Copper-fin II/IIE Boiler and Water Heater Service Manual

• 2-Line / 16 character LCD display

• Backlit LCD

• Press to turn heater off or back on

• Press to select a menu item

• Press after parameter programming
to store parameter data

• Press to exit Service Mode

MENU/EXIT

DISPLAY SCREEN

ENTER/RESET

• Press to change boiler water
temperature and/or tank water
temperature set point during
normal operation

• Press to change displayed data
values in Menu Mode

• Press to navigate through menu
listing in Menu Mode

TXENSUOIVERPNWODPU

• Press to toggle display during normal
operation to show outlet and return
temperatures, fan speed, flame signal, etc.

• Press to toggle between digits when
entering access code or between hour,
minutes, etc., when entering date and time

• Press and hold both to enter Service Mode

5

1 Service

Control inputs

OUTDOOR SENSOR
(OPTIONAL)

SYSTEM SUPPLY/
ENABLE SENSOR
(OPTIONAL)

SYSTEM RETURN SENSOR
(OPTIONAL ON BOILER)

SYSTEM PUMP SPEED
(OPTIONAL)

CASCADE

DHW THERMOSTAT
(OPTIONAL)

ROOM THERMOSTAT/
ZONE CONTROL
(OPTIONAL)

SEQUENCER BUILDING
MANAGEMENT S YSTEM
(FIELD PROVIDED)

LOUVER PROVING SWITCH
(FIELD PROVIDED)

TANK SENSOR
(OPTIONAL)

MODBUS

INLET TEMPERATURE
SENSOR

OUTLET TEMPERATURE/
LIMIT SENSOR

LOW WATER CUTOFF
(OPTIONAL)

GAS PRESSURE SW ITCH
(OPTIONAL)

MANUAL RESET HIGH
LIMIT (OPTIONAL)

AIR PRESSURE SWITCH

FLOW SWITCH

DISPLAY PANEL

PC INTERFACE
(OPTIONAL)

Copper-fin II/IIE Boiler and Water Heater Service Manual

LOW

VOLTAGE

CONNECTION

BOARD

MODBUS

BOARD

(OPTIONAL)

SENSOR
CONNECTION
BOARD
(BOILER AND
POOL HEATER
ONLY)

SMART
SYSTEM
CONTROL
BOARD

6

1 Service (continued)

Control outputs

Copper-fin II/IIE Boiler and Water Heater Service Manual

MODBUS

BOARD

(OPTIONAL)

SMART

SYSTEM

CONTROL

BOARD

LOW

VOLTAGE

CONNECTION

BOARD

MODBUS

0-10V

FIRING RATE

CASCADE

THREE WAY VALVE

(OPTIONAL ON BOILER)

LOUVER RELAY

BUILDING

MANAGEMENT

SYSTEM

RUN TIME CONTACTS

ALARM CONTACTS

ALARM

(OPTIONAL)

UNIT PUMP

SYSTEM PUMP

RELAY

DHW PUMP RELAY

(BOILER)

INDICATES CONNECTIONS MADE TO THE LINE VOLTAGE TERM

INAL STRIP LOCATED IN THE CONTROL PANEL AREA

HOT SURFACE

IGNITER

BLOWER

GAS VALVES

DISPLAY PANEL

PC INTERFACE

(OPTIONAL)

7

1 Service

General Operation

Copper-fin II/IIE Boiler and Water Heater Service Manual

How the appliance operates

The Copper-fin uses a finned copper tube heat exchanger to
transfer heat from the flue products to the water. An electronic
control module monitors various inputs to initiate a call for
heat. The blower provides both primary and secondary air to
the burner and forces the flue products out of the combustion
chamber and into the vent system.

How the control module operates

The Copper-fin control module receives input from appliance
sensors. The control module activates and controls the
blower and gas valves to regulate heat input and switches
heater, DHW and system pumps on and off as needed. The
user/installer programs the module to meet system needs by
adjusting control parameters. These parameters set operating
temperatures and heater operating modes. Appliance operation
can be based on heater outlet water temperature, heater return
water temperature, system supply temperature, system return
temperature or tank temperature, depending on the parameter
setting.

Sequence of operation

Table 1A shows control module normal sequences of operation
for space heating and DHW operation. The combined operation
sequence is for a typical application, programmed to provide
DHW priority.

Access modes

User

The user can adjust space heating and/or tank setpoints using
the UP and DOWN buttons at any time during normal
operation. By entering the USER code (0704), the user can also
change temperature units, time and date, and night setback
settings. In user mode, the following parameters can be viewed
but not changed: Heater outlet water temperature in DHW
mode; heater model number; software version; total operating
hours, and total cycles.

Installer

Most parameters are available only to the installer, accessible
only by entering the installer access code (5309).

Saving parameters

To save parameters and exit programming:

Press the ENTER/RESET button, then the MENU/EXIT button
3 times.

To keep parameter settings only for a current operating cycle:

Press the MENU/EXIT button 3 times after making all desired
parameter changes.

To enter a parameter and continue programming:

Press the MENU/EXIT button 1 time to return to the parameter
listings; press again to return to the menu listings. Remember
to press the ENTER/RESET button when finished programming
in order to save the changes made.

8

Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service (continued)

Sequence of operation

Table 1A_Sequence of Operation - Space Heating and DHW

OPERATION DISPLAY

1. The manual reset high limit must be closed before any
action will take place.

2. Upon a call for heat the control turns on the appropriate
pumps (system and boiler pumps for space heating; DHW
pump for DHW call). The flow switch and low water cutoff
(if equipped) must close.

3. • The gas pressure switch(es) (if equipped) must close.

• The louver proving input must close.

• If the air pressure switch is open, the prepurge cycle then
begins by starting the combustion blower. Once started,
the air pressure switch must close.

4. After the 15 second prepurge, the blower slows down and
the hot surface igniter (HSI) is energized. The HSI is heated
for at least 20 seconds.

5. Once the HSI is hot, the trial for ignition begins with the
opening of the gas valve.

HTR: Standby
OUT: 123.8F(129)

HTR: Standby
OUT: 123.8F(129)

HTR: Standby
OUT: 123.8F(129)

HTR: PREPURGE
OUT: 123.9F(129)

HTR: IGNITION
OUT: 123.9F(129)

6. If the SMART SYSTEM control does not sense flame, then
it will lock out.

7. If the SMART SYSTEM control senses flame,
it will fire the burner to maintain the setpoint. The
stages will fire as required to hold the actual temperature at
the setpoint.

8. If the space heating call for heat is active, and the DHW
thermostat closes, the control will turn on the DHW pump,
wait 2 seconds, and then turn off the boiler pump. This will
divert the hot water away from the heating zone(s) and send
it to the DHW tank instead. The control will then fire the
stages to maintain the outlet temperature to the DHW boiler
setpoint.

HTR: POSTPURGE, PREPURGE
OUT: 123.9F(129)

HTR: RUN STG: 1
OUT: 124.8F(129)

HTR: DHW STG 123
OUT: 177.8(180)

9

Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service

Sequence of operation

Table 1A_(continued from previous page) Sequence of Operation - Space Heating and DHW

OPERATION DISPLAY

9. If the DHW thermostat remains on for more than 30 minutes,
and the space heating call for heat is also on, then the
control will turn on the boiler pump, turn off the DHW pump
after 2 seconds, and resume firing based on the space
heating setpoint. As long as both the space heating and
DHW calls for heat remain active, the control will switch
back and forth between the two modes until one of them is
satisfied.

10. Once both calls for heat are satisfied, the control will turn
off the burners. The blower will remain on for the
30 second postpurge cycle. Any pumps that are running
will continue to run for their respective pump delay times,
then turn off.

HTR: RUN STG 12

OUT: 123.0F(129)

HTR: POSTPURGE

OUT: 127.4F(129)

11. Boiler pump off, system pump continues its delay if
longer.

12. System pump off.

HTR: Standby

OUT: 124.7F(129)

HTR: Standby

OUT: 122.9F(129)

10

Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service (continued)

Display panel menu access

Table 1B_Use this procedure to access menus from the display panel

Note: Not all menu listings shown above are available on water heaters.

11

Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service

Display panel parameter access

Table 1C_This is a typical example of accessing a parameter, shown for parameter K2, SH pump delay

Cascade
BMS

12

Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service (continued)

Parameter table A - Boiler Operation

Table 1D_This table lists SMART SYSTEM control module parameters and where to access them for boiler operation
ONLY

Menu

A

GENERAL

B

SETTINGS

TEMPERATURE

C

DATA

LOGGING

D

FUNCTIONS

E

DHW

SETTINGS

F

OUTDOOR RESET

Sub

Item

1 User Code 17 Yes Yes Yes Yes
2 Date and Time 17 Yes Yes Yes Yes
3 Software Version (Software Ver) 17 Yes No Yes Yes
4 Temperature Units (Temp Units) 17 Yes Yes Yes Yes
5 SH Night Setback Offset (SH NSB Temp) 17 Yes Yes Yes Yes
6 SH Night Setback Times (SH NSB Time) 17 Yes Yes Yes Yes
7 DHW Night Setback Offset (DHW NSB Temp) 17 Yes Yes Yes Yes
8 DHW Night Setback Times (DHW NSB Time) 17 Yes Yes Yes Yes
1 SH Setpoint (SH Setpoint) 17 Yes Yes Yes Yes
2 SH Minimum Setpoint (SH Min Setpt) 17 No No Yes Yes
3 SH Maximum Setpoint (SH Max Setpt) 18 No No Yes Yes
4 SH Offset 18 No No Yes Yes
5 SH Differential (SH Differentl) 18 No No Yes Yes
6 Manual Reset High Limit (Man Res Hi Lim) 18 Yes Yes Yes Yes
7 Auto Reset High Limit (Aut Res Hi Lim) 18 Yes Yes Yes Yes
1 Hours Running SH (Hours Run SH) 18 No No Yes Yes
2 Hours Running DHW (Hours Run DHW) 18 No No Yes Yes
3 Ignition Attempts (Ign Attempts) 18 No No Yes Yes
4 Last 10 Lockouts 18 No No Yes Yes
1 Clear Error Log (Clr Error Log) 18 No No Yes Yes
2 Service Mode Delay (Service Delay) 18 No No Yes Yes
3 Display Timeout (Display Time) 18 No No Yes Yes
4 Bypass Valve Time (Bypass V Time) 18 No No Yes Yes

5 Freeze Protection Pump On (Freeze Pump) 19 No No Yes Yes
6 Freeze Protection Burner On (Freeze Burn) 19 No No Yes Yes
7 Freeze Protection Differential (Freeze Differ) 19 No No Yes Yes
1 Tank Setpoint 19 Yes Yes Yes Yes
2 DHW Boiler Setpoint (DHW Blr Setp) 19 Yes Yes Yes Yes
3 SH/DHW Switching Time (SH/DHW Switch) 19 Yes Yes Yes Yes
4 DHW/SH Switching Time (DHW/SH Switch) 19 Yes Yes Yes Yes
5 DHW Tank Differential (DHW Tank Diff) 19 No No Yes Yes
1 Minimum Outdoor Temperature (Min Air Temp) 20 No No Yes Yes
2 Maximum Outdoor Temperature (Max Air Temp) 20 No No Yes Yes
3 Maximum SH Setpoint (Max SH Setpt) 20 No No Yes Yes
4 Minimum SH Setpoint (Min SH Setpt) 20 No No Yes Yes
5 Outdoor Shutdown Setpoint (Outdoor Shtdn) 20 Yes Yes Yes Yes
6 Outdoor Shutdown Differential (Shutdown Diff) 21 Yes Yes Yes Yes
7 Shift Reset Curve (Shift Reset) 21 No No Yes Yes
8 Boost Temperature (Boost Temp) 21 Yes Yes Yes Yes
9 Boost Time 21 Yes Yes Yes Yes

Description

See

Page

User Access Installer Access

Display Modify Display Modify

13

Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service

Parameter table A - Boiler Operation (continued)

Table 1D_(continued from previous page) This table lists SMART SYSTEM control module parameters and where to
access them for boiler operation ONLY

ANTI-

CYCLING

MODES

CONTROL

CASCADEBMSPUMPS

SERVICE

NOTIFICATION

Menu

G

H

I

J

K

L

Sub

Item

1 Anti-cycle Time (Anti Cycl Tm) 21 No No Yes Yes
2 Anti-cycle Override Differential (Override Diff) 21 No No Yes Yes
3 Minimum On/Off Delay Stages 1, 3 (On/off Delay) 21 Yes Yes Yes Yes
4 Next On Delay 21 Yes Yes Yes Yes
1 SH Controlling Sensor (SH Cnt Sensor) 22 No No Yes Yes
2 Enable Input (Active / Inactive) 22 No No Yes Yes
3 BMS Input (Active / Inactive) 22 No No Yes Yes
4 Cascade (Active / Inactive) 22 No No Yes Yes
5 Sequencer 22 No No Yes Yes
6 ModBus (Active / Inactive) 22 No No Yes Yes

7 ModBus Timeout (ModBus Time) 22 No No Yes Yes
1 Boiler Address (Blr Adress) 23 No No Yes Yes
2 Maximum Cascade Setpoint (Max Casc Stpt) 23 Yes Yes Yes Yes
3 Cascade Offset (Cas Offset) 23 No No Yes Yes
4 Cascade Differential (Cas Different) 23 No No Yes Yes
1 BMS Type 23 No No Yes Yes
2 Voltage at Minimum (V at Min) 23 No No Yes Yes
3 Voltage at Maximum (V at Max) 23 No No Yes Yes
4 Minimum Power (Min Power) 23 No No Yes Yes
5 Maximum Power (Max Power) 23 No No Yes Yes
6 Minimum Setpoint (Min Setpoint) 23 No No Yes Yes
7 Maximum Setpoint (Max Setpoint) 24 No No Yes Yes
8 Voltage to Start CFH (V at Start) 24 No No Yes Yes
9 Voltage Differential Stop CFH (V Diff Stop) 24 No No Yes Yes
1 System Pump Delay (Sys Pump Dlay) 24 No No Yes Yes
2 SH Pump Delay (SH Pump Delay) 24 No No Yes Yes
3 DHW Pump Delay (DHW Pump Dlay) 24 No No Yes Yes
4 System Pump Mode (Sys Pump Mode) 24 No No Yes Yes
1 Service Interval Time (months) (Srv Int Time) 24 No No Yes Yes

2 Service Interval Run (Srv Int Run) 24 No No Yes Yes
3 Service Interval Operation (hours) (Srv Int Op) 24 No No Yes Yes
4 Reset Service 24 No No Yes Yes
5 Accept Personality Plug (Accept PPlug) 24 No No Yes Yes

Description

See

Page

User Access Installer Access

Display Modify Display Modify

14