Lochinvar CREST 2.5, CREST 2, CREST 1.5, CREST 3, CREST 3.5 User Manual

FB-SER Rev B

Service Manual

Models: 1.5 - 2.0 - 2.5 - 3.0 - 3.5

 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 Crest 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 boiler ................................................... 4

Boiler operation ............................................................ 4

Boiler water ................................................................... 4

Freeze protection fluids ................................................ 4

WHAT IS IN THIS MANUAL .............................................. 5

1. SERVICE

Boiler Piping ....................................................................... 6

SMART TOUCH Display (Home Screen) .......................... 7

Control Inputs ............................................................... 8

Control Outputs ............................................................. 9

General Operation ................................................. 10-11

Table 1A - Sequence of Operation .................................. 12

Table 1B - Parameter Table ........................................ 13-17

Viewable and Changeable Control Parameters .......... 18-25

Cascade Screen ............................................................... 26

Graph Screen ................................................................... 27

History Screen ............................................................. 28-29

Service Screen ................................................................. 30

2. MAINTENANCE

Maintenance and Annual Startup ................................ 31-35

3. TROUBLESHOOTING

Before Troubleshooting .................................................... 36

Check Control Module Fuses .......................................... 36

Table 3A - Troubleshooting Chart - No Display ............... 37

Checking Temperature Sensors ...................................... 38

Table 3F - Troubleshooting Chart - Noisy System .......... 39

Table 3G - Troubleshooting Chart - Fault Messages . 40-51

Combustion Analysis Procedure ...................................... 52

Table 3H - Troubleshooting Chart - Combustion Levels 52

Table 3I - Flue Products ................................................... 52

Gas Valve Adjustment Procedure .................................... 53

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

Hazard definitions

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.

Please read before proceeding

Service Manual

 WARNING

Installer – Read all instructions, including this manual and the Crest 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 Crest User’s Information Manual for your reference.

Have this boiler 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.

NOTICE

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.

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

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

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

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). 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.

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

Apply enough water to the combustion chamber lining to prevent airborne dust.

 Remove the combustion chamber lining from the appliance and place it in a plastic bag for disposal.

 Wash potentially contaminated clothes separately from other clothing. Rinse clothes washer

thoroughly.

NIOSH stated First Aid.

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

Please read before proceeding

When servicing boiler –

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

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

Boiler operation –

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

• 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 boiler 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.

Service Manual

Boiler water –

• Thoroughly flush the system (without boiler 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 boiler system. Gaskets and seals in the system may be damaged. This can result in substantial property damage.

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

• Continual fresh make-up water will reduce boiler life. Mineral buildup in the heat exchanger reduces heat transfer, overheats the stainless steel heat exchanger, and causes failure. Addition of oxygen carried in by makeup water can cause internal corrosion. Leaks in boiler piping must be repaired at once to prevent the introduction of makeup water.

Freeze protection fluids –

• NEVER use automotive antifreeze. Use only inhibited propylene glycol solutions which are specifically formulated for hydronic systems. Ethylene glycol is toxic and can attack gaskets and seals used in hydronic systems.

What is in this manual?

Service Manual

Service

Near boiler piping

• Typical system components

The Crest boiler 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 boiler operates

• How the control module operates

• Access modes -- user and installer

• Sequence of operation -- HWG/space heating

Control panel menu access

• Accessing programming mode and locating menus (See separate guide covering the PC interface.)

Maintenance

• Service and maintenance schedules

• Address reported problems

• Inspect boiler area and boiler interior

• Clean condensate trap

• Check all piping for leaks

• Check air openings

• Flue vent system and air piping

• Check water system

• Check expansion tank

• Check boiler relief valve

• Inspect ignition electrode

• Check ignition ground wiring

• Check all boiler wiring

• Check control settings

• Perform start-up and checks

• Check burner flame

• Check flame signal

• Check flue gas temperature

• General maintenance

• Review with owner

• Cleaning boiler heat exchanger

• Oiled bearing circulators

Control panel parameter access

• Accessing and changing parameters from the display panel

Quick start information -- parameter table

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

Crest boiler operation

• Initial Setup

• Set Points

• Outdoor Reset

• Ramp Delay

• BMS

• Advanced Setup

• SH Night Setback

• HWG Night Setback

• Cascade

• Pumps

• Service Notification

Troubleshooting

• Troubleshooting table - No display

• Checking temperature sensors

• Sensor tables

• Troubleshooting table - Fault messages displayed on boiler interface

• Combustion analysis procedure

• Gas valve adjustment procedure

Service Manual

1 Service

Boiler piping

This piping reference is included to specify the Boiler Piping specific to the Crest boiler. This piping scheme is important for proper operation of the SMART TOUCH control. See the Crest Installation and Operation Manual for more detailed piping diagrams.

Single Boiler - Recommended - Primary / Secondary Piping with a Hot Water Generator

FROM SYSTEM

SYSTEM RETURN SENSOR

12"

MAX

HOT WATER

GENERATOR

RELIEF

VALVE

BALL VALVE (TYPICAL)

AIR SEPERATOR

DRAIN PORT (TYPICAL)

SYSTEM SUPPLY SENSOR

SYSTEM CIRCULATOR

BOILER

DRAIN

WATER

GENERATOR

CIRCULATOR

Y-STRAINER (RECOMMENDED)

BOILER PUMP

FLOW CHECK VALVE (TYPICAL)

Single Boiler - Alternate - Full Flow System Piping

RELIEF

VALVE

BALL VALVE

(TYPICAL)

FROM SYSTEM

BOILER DRAIN

Y-STRAIN ER

(RECOMMENDED)

EXPANSION

TANK

PRESSURE REDUCING VALVE

PRESSURE GAUGE

AIR SEPERATOR

DRAIN PORT (TYPICAL)

SYSTEM CIRCULATOR

BACK FLOW PREVENTER

TO SYSTEM

MAKE UP WATER

EXPANSION

TANK

PRESSURE

GAUGE

PRESSURE REDUCING VALVE

BACK FLOW PREVENTER

TO SYSTEM

MAKE UP WATER

Service Manual

1 Service (continued)

The Home Screen displays status, modulation rate, outlet water temperature, inlet water temperature, flue temperature, system supply temperature, system return temperature, outdoor air temperature, and domestic hot water tank temperature.

The boiler can be started and stopped by pressing the ON/OFF button. The Boiler Status Screen and Main Menu Screen can be accessed by pressing the appropriate button.

Home Screen

When the ON/OFF switch is turned to the ON position, the first screen visible on the LCD display will be the Home Screen. This screen displays the current status of the Crest boiler. The following items can be viewed or interacted with on the Home Screen:

On/Off button - Pressing this button allows the boiler to be placed in either Manual Shutdown Mode or Standby Mode.

Status - This line shows the current operating status of the Crest boiler and the current set point.

Outlet Water Temperature - This is the boiler outlet temperature.

Inlet Water Temperature - This is the boiler inlet temperature.

System Supply Temperature - This is the water temperature

as measured by the system supply sensor located in the downstream piping (if connected).

System Return Temperature - This is the water temperature measured by the system return sensor located in the upstream piping (if connected).

Outside Air Temperature - This is the outdoor air temperature (if connected).

HWG Temperature - This is the temperature as measured by the tank sensor in the hot water storage tank (if connected).

Flue Temperature - Temperature measured by the flue sensor.

Time - The time is displayed in the lower left-hand corner of the

display. Reference this manual for Night Setback parameters and more information regarding adjusting the date and time.

Boiler Status button - Pressing this button brings up the Boiler Status Screen. This screen shows the status of the various safeties, inputs, and outputs to the control module. Reference this manual for more information regarding this screen.

Main Menu button - Pressing this button brings up the Main Menu Screen. From this screen navigation to nine (9) other screens is possible.

Modulation button - Pressing this button brings up the Modulation Screen. This screen shows overall boiler modulation, individual fan speeds, and flame currents.

Modulation Percentage - Displays the current boiler firing rate.

1 Service

Control inputs

HWG THERMOSTAT /

SENSOR

ENABLING DEVICE

LOUVER PROVING SWITCH

SYSTEM SENSOR -

SUPPLY

SYSTEM SENSOR -

RETURN

Service Manual

CASCADE

LOW VOLTAGE

CONNECTION

BOARD

OUTDOOR SENSOR

SEQUENCER / BUILDING

MANAGMENT SYSTEM

AUX SWITCH 1 & 2

0-10 INPUT FROM

SYSTEM PUMP

INLET TEMPERATURE

SENSOR

OUTLET TEMPERATURE /

HI-LIMIT SENSOR

FLUE GAS SENSOR

INLET AIR SENSORS

AIR PRESSURE SWITCH

MANUAL RESET

HIGH LIMIT

FLAME SENSOR 1 & 2

BLOCKED DRAIN SWITCH

MODBUS

BOARD

SMART CONTROL

MODULE

GAS PRESSURE SWITCHES

LOW WATER CUTOFF

BLOWER PROVING

SWITCHES

VENT DAMPER

PROVING SWITCH

DISPLAY PANEL

PC INTERFACE

1 Service

1 Service (continued)

Control outputs

LOW VOLTAGE

CONNECTION

BOARD

LINE VOLTAGE

FIELD SUPPLIED CONTACTOR MUST

BE INSTALLED

TERMINAL

SUPPLY

120V

SYSTEM PUMP BOILER PUMP DHW PUMP

MAX. 1.5 AMPS PER CONNECTION

STRIP

Service Manual

0-10V OUTPUT TO

BOILER PUMP

ALARM CONTACTS

LOUVER RELAY

RUN TIME CONTACTS

BOILER RATE OUTPUT

SEQUENCER / BUILDING

MANAGMENT SYSTEM

SMART CONTROL

MODULE

BOILER PUMP

CONTACTOR

SYSTEM PUMP

CONTACTOR

HWG PUMP

CONTACTOR

IGNITOR

BLOWERS

GAS VALVES

VENT DAMPER

DISPLAY PANEL

PC INTERFACE

1 Service

Service Manual

General Operation

How the boiler operates

The Crest uses an advanced stainless steel heat exchanger and electronic control module that allows fully condensing operation. The blowers pull in air and push flue products out of the boiler through the heat exchanger and flue piping. The control module regulates blower speeds to control the boiler firing rate. The gas valves sense the amount of air flowing into the boiler and allow only the right amount of gas to flow.

How the control modules operate

The Crest boiler is equipped with a SMART TOUCH control module. The SMART TOUCH control module receives inputs from boiler sensors and external devices. The control module activates and controls the blowers and gas valves to regulate heat input and switches the boiler, Hot Water Generator (HWG), and system pumps on and off as needed. The user programs the control module to meet system needs by adjusting control parameters. These parameters set operating temperatures and boiler operating modes.

Sequence of operation

Figure 1-1 Home Screen

Figure 1-2 Main Menu Screen

Table 1A (page 12) shows control module normal sequences of operation for space heating and HWG operation. The combined operation sequence is for a typical application, programmed to provide HWG priority.

Access modes

User

The USER can adjust various space heating and HWG operating variables:

- Navigate to the Initial Setup Screen (FIG. 1-5).

- From the Home Screen (FIG. 1-1), press MAIN MENU, then press SETUP on the Main Menu Screen (FIG. 1-2).

- Press ENTER on the Password Screen (FIG. 1-3) (do not enter any values) and then press INITIAL SETUP on the Setup Screen (FIG. 1-4).

The USER can set the date and time and adjust temperature set points, and outdoor reset points.

Under the ADVANCED SETUP menu, the USER can change the TEMPERATURE UNITS and the LCD BACKLIGHT TIMER.

Figure 1-3 Password Screen

Installer

Most parameters are available only to the INSTALLER, accessible only by entering the installer password (5309) in the Password Screen (see the User Section).

1 Service (continued)

Service Manual

Figure 1-4 Setup Screen

Figure 1-5 Initial Setup Screen

Saving parameters (reference the Parameter Table -

Table 1B on pages 13 - 17 of this manual)

To adjust and save parameters (reference FIG. 1-5):

To change a parameter, use the arrows next to the parameter list on the Menu Screen to highlight the desired parameter, then press SELECT. A short description of the parameter and its current setting are then displayed on the bottom half of the screen. To adjust the setting, use the buttons to the left and right of the current setting.

Note: If the above mentioned buttons to adjust settings do not appear, the correct PASSWORD has not been entered.

Press the SAVE button after adjusting a parameter value. Additional parameter settings can then be adjusted or other navigation buttons can be used to return to previous screens or the Home Screen (FIG. 1-1).

Note: The SAVE button MUST BE pressed to ensure proper programming of the control. Failure to press the SAVE button will require all changes to be reprogrammed.

Service Manual

1 Service

Table 1A Sequence of Operation

Sequence of operation

Note: This unit is equipped with two (2) gas train systems. Gas Train 1 will fire first. If the demand cannot be met by the first gas train, the second gas train (Gas Train 2) will fire.

Upon a call for heat, the control turns on the appropriate pumps (system and boiler pumps for a space heating call,

HW pump for a domestic hot water call).

The control confirms that the low water cutoff contacts are closed and energizes the louvers (optional) and damper

(optional) relays.

The control confirms that the gas pressure switch, blocked drain switch, limits, louver proving switch (optional) and

damper proving switch (optional) contacts close. The Pre-Purge cycle begins.

The control confirms both blowers come up to the desired speed, both blower proving switches close, and the air

pressure switch is closed.

10.

Once the Pre-Purge cycle is complete, the control lowers the blower speeds, initiates sparking of the ignition electrode, and opens Gas Valve 1.

After a short wait, the control stops sparking and checks for the presence of flame current through the flame sense electrode.

If the control does not detect flame current, the control will lockout indefinitely, until the RESET button on the touch screen LCD is pressed. Models FB 1500 - 2500 will have one retry.

If the control detects flame current, the control will hold the blower speed constant for a few seconds to allow the flame to stabilize, then begin modulating the firing rate in order to maintain the controlling sensor to the desired set point temperature.

If the current call for heat is for space heating and a HW call for heat becomes active, the control will turn on the HW pump relay output, then turn off the boiler pump. It will then modulate the blower speed in order to maintain the outlet temperature to the desired HW outlet set point temperature.

If the first combustion system in the boiler is unable to maintain the desired set point temperature, the second combustion system in the boiler will be started. Both blowers will modulate to a set speed, and the second gas valve will be energized. The second combustion system will light from the first combustion system. The second flame will be monitored much like the first. Once both combustion systems are firing, the control will work in synchronization to maintain the desired set point temperature. If the heat load should decrease sufficiently, the second combustion system will be shut down.

11.

12.

13.

14.

Once both the space heating and HW calls for heat are satisfied, the control will turn off the gas valve(s) and begin the Post-Purge cycle. Any pumps that are running will begin their respective Pump Delay cycles.

At the end of the Post-Purge cycle, the louver relay contacts will de-energize.

The control verifies that the blowers stop running and the blower proving switches open.

At the end of the Pump Delay cycle(s), the pump(s) will be turned off.

Service Manual

1 Service

1 Service (continued)

Parameter table

Table 1B This table lists SMART TOUCH control module parameters and where to access them

INITIAL SETUP

Sub

Item

1 Clock 18 N/A N/A N/A Yes Yes

2 Date 18 N/A N/A N/A Yes Yes

3 SH Setpoint 18 32 185 120 Yes Yes

4 HWG Tank Setpoint 18 32 185 120 Yes Yes

5 MRHL Setpoint 18 32 205 205 Yes Yes

6 ARHL Setpoint 18 32 200 200 Yes Yes

7 SH Setpoint at Low Outdoor Temp. 19 32 185 180 Yes Yes

8 SH Setpoint at High Outdoor Temp. 19 32 185 68 Yes Yes

9 Low Outdoor Temperature 19 -22 86 23 Yes Yes

10 High Outdoor Temperature 19 -22 86 86 Yes Yes

11 Boiler Pump Mode 24 N/A N/A N/A No Yes

12 System Pump Mode 24 N/A N/A N/A No Yes

1 SH Min User Setpoint 18 32 185 32 No Yes

2 SH Max User Setpoint 18 32 185 185 No Yes

Parameter Name

(as shown on the LCD screen)

See

Page

Min

Max

Default

User Installer

Value Value Value Access Access

3 SH Setpoint 18 32 185 125 Yes Yes

4 SH Offset 18 0 36 9.9 No Yes

5 SH Differential 18 0 72 19.8 No Yes

6 HWG Tank Setpoint 18 32 185 120 Yes Yes

7 HWG Tank Differential 18 0 10 6.3 No Yes

8 MRHL Setting 18 32 205 204.8 Yes Yes

SETPOINTSOUTDOOR RESET

9 ARHL Setting 18 32 200 199.4 Yes Yes

10 HWG Minimum User Setpoint 19 32 185 60 No Yes

11 HWG Maximum User Setpoint 19 32 185 185 No Yes

12 HWG Boiler Setpoint 19 32 185 180 No Yes

13 HWG Boiler Offset 19 0 36 9.9 No Yes

14 HWG Boiler Differential 19 0 72 185 No Yes

1 SH Setpoint at Low Outdoor Temp. 19 32 185 180 Yes Yes

2 SH Setpoint at High Outdoor Temp 19 32 185 68 Yes Yes

3 Low Outdoor Temperature 19 -22 86 23 Yes Yes

4 High Outdoor Temperature 19 -22 86 86 Yes Yes

5 Outdoor Air Shutdown 19 32 122 79.7 No Yes

6 OA Shutdown Differential 20 32 122 79.7 No Yes

Service Manual

1 Service

Parameter table

Table 1B (continued from previous page) This table lists SMART TOUCH control module parameters and where to access them

OUTDOOR

RAMP DELAY

Sub

Item

RESET

Parameter Name

(as shown on the LCD screen)

7 Boost Time 20 0 250 20 No Yes

8 Boost Temperature 20 0 25 0 No Yes

9 Shift OA Reset Curve 20 -27 27 0 No Yes

1 Ramp Delay Mode 20 N/A N/A N/A No Yes

2 Ramp Delay Time #1 20 1 40 2 No Yes

3 Ramp Delay Time #2 20 1 40 2 No Yes

4 Ramp Delay Time #3 20 1 40 2 No Yes

5 Ramp Delay Time #4 20 1 40 1 No Yes

6 Ramp Delay Time #5 20 1 40 1 No Yes

7 Ramp Delay Time #6 20 1 40 1 No Yes

8 Ramp Delay Limit #1 20 10 100 20 No Yes

9 Ramp Delay Limit #2 20 10 100 30 No Yes

10 Ramp Delay Limit #3 20 10 100 40 No Yes

11 Ramp Delay Limit #4 20 10 100 55 No Yes

See

Page

Min

Value Value Value Access Access

Max

Default

User Installer

BMS

12 Ramp Delay Limit #5 20 10 100 75 No Yes

13 Ramp Delay Limit #6 20 10 100 100 No Yes

1 BMS Active/Inactive 21 ACTIVE INACTIVE INACTIVE No Yes

2 BMS Mode 21 POWER SETPOINT POWER No Yes

3 BMS Volts at Min Rate 21 0 10 2 No Yes

4 BMS Volts at Max Rate 21 0 10 10 No Yes

5 BMS Rate at Min Volts 21 4 100 4 No Yes

6 BMS Rate at Max Volts 21 0 100 100 No Yes

7 BMS Volts at Min Setpoint 21 0 10 2 No Yes

8 BMS Volts at Max Setpoint 21 0 10 10 No Yes

9 BMS Setpoint at Min Volts 21 32 185 68.9 No Yes

10 BMS Setpoint at Max Volts 21 32 185 178.7 No Yes

11 BMS Volts to Enable 21 0 10 2 No Yes

12 Differential to Stop BMS Demand 21 0 10 0.5 No Yes

13 BMS Enable Mode 21 ENABLE VOLTAGE VOLTAGE No Yes

Service Manual

1 Service (continued)

Parameter table

Table 1B (continued from previous page) This table lists SMART TOUCH control module parameters and where to access them

ADVANCED SETUP

Sub

Item

1 Temperature Units 21 °F °C °F Yes Yes

2 LCD Backlight Time 21 0 255 240 Yes Yes

3 Freeze Protection; Pump On 21 -22 45 44.6 No Yes

4 Freeze Protection; Burner On 22 -22 45 37.4 No Yes

5 Freeze Protection; Burner Diff 22 0 20 5 No Yes

6 HWG to SH Switching Time 22 0 240 30 No Yes

7 SH to HWG Switching Time 22 0 240 30 No Yes

8 Anti-Cycling Time 22 0 40 10 No Yes

9 Anti-Cycling Differential 22 0 40 1 No Yes

10 HWG Rate Limiting 22 10 100 100 No Yes

11 Service Mode Timeout 22 0 40 40 No Yes

12 Controlling Sensor 22 0 4 2 No Yes

13 Inlet Control Time Delay 22 0 40 3 No Yes

1 SH Night Setback Offset Temp 22 0 90 0 No Yes

Parameter Name

(as shown on the LCD screen)

See

Page

Min

Max

Default

User Installer

Value Value Value Access Access

2 SH Night Setback Mon End 22 N/A N/A N/A No Yes

3 SH Night Setback Mon Begin 22 N/A N/A N/A No Yes

4 SH Night Setback Tue End 22 N/A N/A N/A No Yes

5 SH Night Setback Tue Begin 22 N/A N/A N/A No Yes

6 SH Night Setback Wed End 22 N/A N/A N/A No Yes

7 SH Night Setback Wed Begin 22 N/A N/A N/A No Yes

8 SH Night Setback Thur End 22 N/A N/A N/A No Yes

9 SH Night Setback Thur Begin 22 N/A N/A N/A No Yes

SH NIGHT SETBACK

10 SH Night Setback Fri End 22 N/A N/A N/A No Yes

11 SH Night Setback Fri Begiin 22 N/A N/A N/A No Yes

12 SH Night Setback Sat End 22 N/A N/A N/A No Yes

13 SH Night Setback Sat Begin 22 N/A N/A N/A No Yes

14 SH Night Setback Sun End 22 N/A N/A N/A No Yes

15 SH Night Setback Sun Begin 22 N/A N/A N/A No Yes

Service Manual

1 Service

Parameter table

Table 1B (continued from previous page) This table lists SMART TOUCH control module parameters and where to access them

HWG NIGHT SETBACK

Sub

Item

1 HWG Night Setback Offset Temp 22 0 90 0 No Yes

2 HWG Night Setback Mon End 22 N/A N/A N/A No Yes

3 HWG Night Setback Mon Begin 22 N/A N/A N/A No Yes

4 HWG Night Setback Tue End 22 N/A N/A N/A No Yes

5 HWG Night Setback Tue Begin 22 N/A N/A N/A No Yes

6 HWG Night Setback Wed End 22 N/A N/A N/A No Yes

7 HWG Night Setback Wed Begin 22 N/A N/A N/A No Yes

8 HWG Night Setback Thur End 22 N/A N/A N/A No Yes

9 HWG Night Setback Thur Begin 22 N/A N/A N/A No Yes

10 HWG Night Setback Fri End 22 N/A N/A N/A No Yes

11 HWG Night Setback Fri Begin 22 N/A N/A N/A No Yes

12 HWG Night Setback Sat End 22 N/A N/A N/A No Yes

13 HWG Night Setback Sat Begin 22 N/A N/A N/A No Yes

14 HWG Night Setback Sun End 22 N/A N/A N/A No Yes

Parameter Name

(as shown on the LCD screen)

See

Page

Min

Value Value Value Access Access

Max

Default

User Installer

BUS

MOD

CASCADE

15 HWG Night Setback Sun Begin 22 N/A N/A N/A No Yes

1 ModBus Active / Inactive 23 ACTIVE INACTIVE INACTIVE No Yes

2 ModBus Out of Order Timer 23 5 120 30 No Yes

1 Cascade Active / Inactive 23 ACTIVE INACTIVE INACTIVE No Yes

2 Cascade Address 23 0 7 1 No Yes

3 Cascade Offset 23 0 40 10 No Yes

4 Cascade Differential 23 0 72 20 No Yes

5 Max Boiler Setpoint for Cascade 23 32 185 185 No Yes

6 Cascade Type 23 N/A N/A N/A No Yes

7 Block Time Switching Boiler On / Off 23 0 255 60 No Yes

8 Minimum Next On Time 24 0 255 60 No Yes

9 Rate % to Switch On Next Boiler 24 1 100 80 No Yes

10 Rate % to Switch Off Last Boiler 24 1 100 10 No Yes

11 Number of Boiler Pumps Always On 24 0 8 0 No Yes

Service Manual

1 Service (continued)

Parameter table

Table 1B (continued from previous page) This table lists SMART TOUCH control module parameters and where to access them

PUMPS

SERVICE

NOTIFICATION

Sub

Item

1 Boiler Pump Delay 24 0.5 2400 30 No Yes

2 Boiler Pump Anti-Seize Time 24 0 40 0.33 No Yes

3 Boiler Pump Mode 24 N/A N/A N/A No Yes

4 System Pump Mode 24 N/A N/A N/A No Yes

5 System Pump Delay 24 0.5 2400 30 No Yes

6 System Pump Anti-Seize Time 24 0 40 0.33 No Yes

7 HWG Pump Delay 24 0.5 2400 30 No Yes

8 HWG Pump Anti-Seize Time 24 0 40 0.33 No Yes

9 Delta T Setpoint 24 0 60 0 No Yes

1 Maintenance Notice - Months 25 0 36 12 No Yes

2 Maintenance Notice - Running Hours 25 0 100,000 10,000 No Yes

3 Maintenance Notice - Cycles 25 0 100,000 10,000 No Yes

4 Service Contact Number 25 N/A N/A N/A No Yes

5 Service Contact Name 25 N/A N/A N/A No Yes

Parameter Name

(as shown on the LCD screen)

See

Page

Min

Value Value Value Access Access

Max

Default

User Installer

+ 39 hidden pages

Lochinvar CREST 2.5, CREST 2, CREST 1.5, CREST 3, CREST 3.5 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual