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Pennant PNCV Installation And Operation Instructions Manual

Sizes 500-2000 hydronic boiler and water heater
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Installation and Operation Instructions
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water boiler installation and maintenance. Improper installation and/or operation could
create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.
Improper installation and/or operation will void the warranty. For indoor installations, as an additional
measure of safety, Laars strongly recommends installation of suitable Carbon Monoxide detectors in the
vicinity of this appliance and in any adjacent occupied spaces.
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
flammable vapors and liquids in the vicinity
of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the fire department.
Installation and service must be performed
by a qualified installer, service agency, or gas
supplier.
WARNING
Installation and Operation
Instructions for
PENNANT
LOW TEMP PENNANT
includes
Hydronic Boiler
Model PNCH
Water Heater
Model PNCV
Sizes 500-2000
U.S. Reg. 2,765,423
AVERTISSEMENT
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d'incendie ou d'explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d'essence ni
d'autres vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d'allumer d'appareils.
• Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones dansle bâtiment où vous
vous trouvez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions du
fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L'installation et l'entretien doivent être assurés par
un installateur ou un service d'entretien qualifié ou
par le fournisseur de gaz.
Document 1373A
™

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  • Page 1 Installation and Operation Instructions Document 1373A Installation and Operation Instructions for PENNANT ™ LOW TEMP PENNANT includes Hydronic Boiler Model PNCH Water Heater Model PNCV Sizes 500-2000 U.S. Reg. 2,765,423 FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hot water boiler installation and maintenance.

  • Page 2: Table Of Contents

    Warm Weather Shut Down ........45 4.A.3 Water Flow Requirements —Boiler ......18 6.D.5 Anti-Short Cycle ............. 46 4.A.4 W ater Flow Requirements — 6.D.6 Time & Date ............46 Low Temperature Pennant Boilers ......18 Configure Screen ........47 4.A.5 Freeze Protection — Boiler ........19 6.E.1 CH/DHW ..............47 4.A.6 Filling the Boiler System ......... 22 6.E.1.a CH1/DHW1 ............. 47 Water Heaters ............24 6.E.1.b Additional Settings ..........
  • Page 3 6.E.10 Setting the Time and Date ........62 9.B.10 Blowers ..............77 6.E.11 Miscellaneous Features ......... 62 9.B.11 Flow Switch ............77 6.E.11.a Mixing Valve. Low Temp Pennant ......62 9.B.12 Heat Exchanger Coil ..........77 6.E.11.b Anti-Short Cycle ............. 63 6.E.11.c Wireless Setup ............63 SECTION 10 Trouble Shooting ......78 6.E.11.d Warm Weather ............63 10.A Resolving Lockouts ..........

  • Page 4: Section 1 General Information

    This manual provides information necessary modifications to the boiler, its gas controls, or wiring for the installation, operation, and maintenance of may void the warranty. If field conditions require Laars Heating Systems Pennant appliances (including the Low Temp Pennant). Read this manual carefully modifications, consult the factory representative before installation. before initiating such modifications. All application and installation procedures should be reviewed completely before proceeding with the installation.

  • Page 5: B Warranty

    15 16 FIRING HEAT SERIES USAGE SIZE FUEL ALTITUDE LOCATION REVISION MODE EXCHANGER OPTION CODES 12TH CHARACTER (FIRING MODE) IST & 2ND CHARACTERS (MODEL SERIES) ON-OFF (PUMP MOUNTED WITH MIXING SYSTEMS) PENNANT BRADFORD WHITE PRIVATE LABEL TWO-STAGE (PNCH & PNCV 500-750) blank: PENTAIR POOL HEATER, PRIVATE LABEL THREE-STAGE (PNCH & PNCV 1000) 3RD CHARACTER (MODEL EFFICIENCY) FOUR-STAGE (PNCH & PNCV 1250-2000) MID EFFICIENCY (NON-CONDENSING) 13TH CHARACTER (REVISION) PENTAIR POOL HEATER, PRIVATE LABEL 4TH CHARACTER (USAGE) ENGINEERING REVISION CHARACTER, IN SEQUENCE HYDRONIC VOLUME WATER 14TH CHARACTER (HEAT EXCHANGER) POOL HEATER GLASS-LINED CAST IRON / COPPER / BRONZE TRIM (STD PNCP-PM, N/A PNCV, OPT PNCH) PENTAIR POOL HEATER, PRIVATE LABEL GLASS-LINED CAST IRON / COPPER (STD PNCH, N/A PNCV-PNCP-PM) 5TH THROUGH 8TH CHARACTERS (SIZE) GLASS-LINED CAST IRON / CUPRONICKEL (OPT PNCH, N/A PNCV-PNCP-PM)

  • Page 6: D Dimensions

    79 8¾ 22 8¾ 22 101 256 12 30 14 36 12 30 2000 ∕ ∕ 99½ 253 49¾ 126 10 26 30¾ 78 31 79 8¾ 22 8¾ 22 112 284 12 30 14 36 12 30 *Air and vent connections may be on top or back of the Pennant, and are field convertible. Dimensions in inches cm Figure 1. Dimensional Data.

  • Page 7: E Locating The Appliance

    The appliance is design certified by CSA- International for installation on combustible flooring; in basements; in closets, utility rooms or alcoves. Pennant Boilers or Water Heaters must never be installed on carpeting. The location for the appliance REQUIRED RECOMMENDED...

  • Page 8: H Locating Appliance For Correct Horizontal Vent/Ducted Air Distance From Outside Wall

    5. Tapered Rubber Stopper larger than the size of the vent pipe that can be used. 6. Resistor, 1.5K, 1/4 Watt, 250V, Axial Vent collar size and horizontal pipe diameters can be found in Table 1 The larger vent collar size is to 7. Bushing, Nylon accommodate Category I (vertical) vent systems. 8. Capillary Clamp 9. Outdoor Sensor NOTE: When located on the same wall, the Pennant 10. Sensors, Inlet, Temperature, Water combustion air intake terminal must be installed 11. Label, Box, Remote Sensor a minimum of 12" (30cm) below the exhaust vent terminal and separated by a minimum of 36 inches (91cm) horizontally. The air intake terminal must be installed high enough to avoid blockage from snow, leaves and other debris.

  • Page 9: Section 2 Venting And Combustion Air

    Combustion Air 2.A Combustion Air with the outdoors. When directly communicating Pennant boilers and water heaters must have with the outdoors, or when communicating to the provisions for combustion and ventilation air in accordance with Section 5.3, Air for Combustion and...

  • Page 10: B Venting

    The Pennant loses less than 1 percent of arrangement must be used to prevent entry of rain water (see Figure 3).

  • Page 11: Common Venting Systems

    However, this safety switch has vented vertically and adhering to all applicable codes. Pennant units are not allowed to be vented only been designed and tested to be effective in installations where the Pennant is vented separately into a common horizontal Cat III vent system and NOT common vented with other appliances.
  • Page 12 LAARS Heating Systems Page 12 U.S. Installations (see note 1) Canadian Installations (see note 2) A = Clearance above grade, veranda, porch, 12 inches (30 cm) 12 inches (30 cm) deck, or balcony B = Clearance to window or door that may be 4 feet (1.2 m) below or to side of opening; 36 inches (91 cm) opened 1 foot (30 cm) above opening C = Clearance to permanently closed window See note 4 See note 5 D = Vertical clearance to ventilated soffit located above the terminal within a horizontal See note 4 See note 5 distance of 2 feet (61cm) from the center line of the terminal E = Clearance to unventilated soffit See note 4...

  • Page 13: Category Iii Vent

    Page 13 2.B.4 Category III Vent Vent terminals for condensing appliances or When the Pennant is vented with horizontal appliances with condensing vents are not permitted to terminate above a public walkway, discharge, it must be installed per this installation or over an area where condensate or vapor could manual and the venting system manufacturer’s...
  • Page 14 LAARS Heating Systems Page 14 INSTALLATION OF CARBON MONOXIDE (b) EXEMPTIONS: The following equipment is DETECTORS. exempt from 248 CMR 5.08(2)(a) 1 through 4: At the time of installation of the side wall horizontal vented gas fueled equipment, the 1. The equipment listed in Chapter 10 entitled installing plumber or gasfitter shall observe that “Equipment Not Required To Be Vented”...

  • Page 15: Side Wall Combustion Air Terminal

    Turn on any exhaust fans, such local conditions. as range hoods and bathroom exhausts, so they If the Pennant is side-wall vented to the same will operate at maximum speed. Do not operate a wall, locate the vent terminal at least 3 feet summer exhaust fan.

  • Page 16: E Vent Terminals For Outdoor Units

    Pennant. d'étranglement, de fuite, de corrosion et autres défaillances qui pourraient présenter des risques.

  • Page 17: Section 3 Gas Supply And Piping

    All threaded joints should be coated with The Pennant’s gas train allows the user to pipe piping compound resistant to action of liquefied the gas from either the right side or the left side of petroleum gas.

  • Page 18: Section 4 Water Connections Boiler Or Water Heater

    Pennant will ensure that the heat exchanger in the The boiler piping system of a hot water heating Pennant does not see water that is less than 120°F boiler connected to heating coils located in air (49°C), so that excessive condensation does not form handling appliances where they may be exposed to on the heat exchanger.

  • Page 19: Freeze Protection - Boiler

    Pennant ( 500-2000 ) Page 19 4.A.5 Freeze Protection — Boiler shows a relationship between water flow Table 8 Boiler installations are not recommended in through the boiler and the temperature difference (rise) between the inlet and outlet of the boiler. This table areas where the danger of freezing exists unless proper precautions are made for freeze protection.
  • Page 20 LAARS Heating Systems Page 20 150°F COLD WATER MAKE-UP 180°F SYSTEM RETURN SYSTEM SUPPLY TEMPERATURE TEMPERATURE 130°F SENSOR SENSOR 180°F SYSTEM PUMP NOTES: 1. BOILER LOOP IN EXAMPLE IS MAINTAINED AT 180°F. PUMP LOCATION FOR 2. ZONE THERMOSTATS CAN BE INTERLOCKED WITH BOILER, NON-PUMP-MOUNTED UNITS SO THAT BOILER FIRES UPON CALL FOR HEAT FROM ANY ZONE.
  • Page 21 COMBINED FLOW OF ALL BOILERS. BOILER WATER CONNECTIONS (INLET/OUTLET) MAY VARY. VERIFY CONNECTION ORIENTATION. 3-Way Valve BOILER CIRCUIT PIPING MUST BE EQUAL Mounted on Pennant BOILER WATER CONNECTION SIZE. BOILER CIRC. PUMP SIZED FOR FLOW THROUGH BOILER AND 30 FEET OF FULL-SIZED PIPING.

  • Page 22: Filling The Boiler System

    LAARS Heating Systems Page 22 COLD WATER MAKE-UP SYSTEM RETURN SYSTEM SUPPLY TEMPERATURE TEMPERATURE SENSOR SENSOR SYSTEM RETURN SYSTEM SYSTEM PUMP SUPPLY PUMP LOCATION FOR NON-PUMP-MOUNTED UNITS PUMP LOCATION FOR PUMP-MOUNTED UNITS PRIMARY/SECONDARY MANDITORY FOR ALL CAUTION: THIS DRAWING SHOWS SUGGESTED VARIABLE FLOW SYSTEMS PIPING CONFIGURATION AND VALVING, CHECK WITH LOCAL CODES AND ORDINANCES FOR...
  • Page 23 Pennant ( 500-2000 ) Page 23 COLD WATER MAKE-UP SYSTEM RETURN SYSTEM SUPPLY TEMPERATURE TEMPERATURE SENSOR SENSOR SYSTEM RETURN SYSTEM SYSTEM PUMP SUPPLY ADJUSTMENT PROCEDURE TO MAINTAIN 120°F INLET TEMP: 1. Turn on boiler and open valves A & B.

  • Page 24: B Water Heaters

    Low-Temp Pennant is 70°F (20°C). The mixing system on the Pennant will ensure that the heat exchanger in the Pennant does not see water that is less than 120°F (49°C), so that excessive condensation does not form on the heat exchanger.

  • Page 25: Hot Water Supply Piping -Water Heater

    This water heater when used to supply potable If the Pennant water heater is installed in a water shall not be connected to any heating system closed water supply system, such as one having a...
  • Page 26 LAARS Heating Systems Page 26 Figure 10. Water Heater Piping, Low Temperature System — One Heater, One Tank. Figure 11. Water Heater Piping— One Heater, One Tank.
  • Page 27 Pennant ( 500-2000 ) Page 27 Figure 12. Water Heater Piping — Multiple Heaters, One Tank. Figure 13. Suggested Piping, Low Temp System — Multiple Water Heaters, One Tank.
  • Page 28 LAARS Heating Systems Page 28 Figure 14. Water Heater Piping — One Heater, Multiple Tanks. Figure 15. Suggested Piping, Low Temp System — One Water Heater, Multiple Tanks.
  • Page 29 Pennant ( 500-2000 ) Page 29 Figure 16. Water Heater Piping — Multiple Heaters, Multiple Tanks. Figure 17. Suggested Piping, Low Temperature — Multiple Water Heaters, Multiple Tanks.

  • Page 30: Filling The Water Heater System

    LAARS Heating Systems Page 30 TEMP RISE °F LPM TEMP RISE °C SIZE 1000 1250 1500 1750 2000 10.0 10.0 10.0 NOTES: 1. S = soft water (1 to 7.5 grains hardness) 2. N = normal water (7.6 to 17 grains hardness) 3. H = hard water (more than 17 grains hardness) 4. gpm = gallons per minutes, lpm = liters per minute, ft = headless in feet, m = headloss in meters 5. Headloss is for heater’s heat exchanger only Table 9. Water Flow Requirements – Heater. 4.B.6 Filling the Water Heater System 13.

  • Page 31: Section 5 Electrical Connections

    Table 3 on page 11. bringing in a separate circuit for the pump and removing the three jumper wires within the internal wiring of the 120-volt portion of the Pennant (see Figure 3). This action should only be performed by 5.B.1 Main Power...

  • Page 32: Auxiliary Power Output

    Figure 25 on page 40. This sensor is supplied loose 5.C.1.a Safety Interlocks with the Pennant and is installed in the piping or tank Field Interlock: If the Field Interlock is utilized, per the suggested piping diagrams. remove the jumper from the terminals 1 and 2 of the...

  • Page 33: C.1.E Analog (Bas) Input

    Pennant is running. This is typically The DHW heat demand is satisfied when the DHW used by a BAS to verify the Pennant is satisfying a heat temperature rises above the DHW set point by the demand. Contact ratings are 250VAC, 0.6A maximum.

  • Page 34: C.2.B Cascade Rs485

    B (terminal 22), and the shielded w/drain, communication cable between the drain wire to GND (terminal 24). Connect the other BAS and Pennant. end of the cable to the next Pennant, matching the termination wiring on the previous unit, except for 5.C.2.d 24VAC GND.

  • Page 35: D Cascade Wiring Connections

    Pennant ( 500-2000 ) Page 35 5.D Cascade Wiring Connections Figure 21. Cascade Wiring Connections Figure 22. BAS Wiring Connections...

  • Page 36: E Wiring Diagram

    LAARS Heating Systems Page 36 Voltage Legend 120 VAC FIELD INPUTS BOILER/HEATE Low Voltage MAIN POWER SWITCH Wiring YELLOW 120VAC FIELD PUMP TB1-9 X2-6 Diagram BLACK/RED INPUT 1 TB1-10 X2-13 BROWN NOTE: L2/N2 only applicable on sizes 1750 and 2000, FIELD TB1-11 X2-7...

  • Page 37: Wiring Diagram

    BLACK X14-2 TB2-7 AUX POWER (N) TB1-15 X1-1 BROWN/WHITE WHITE X14-9 TB2-8 OUTPUT (L) TB1-16 X1-5 VIOLET Pennant ( 500-2000 ) Page 37 GREEN X14-3 TB2-9 DHW PUMP TB1-17 X1-17 BROWN/VIOLET BLUE/WHITE X14-10 TB2-10 DRY CONTACT TB1-18 X1-6 ORANGE BLUE...

  • Page 38: F Ladder Diagram

    LAARS Heating Systems Page 38 Ladder Diagram Voltage Legend 500 - 2000 120 VAC Low Voltage Ladder MAIN POWER SWITCH BOILER/HEATER PUMP Diagram 120VAC N2 * NOTE: L2 only applicable on sizes 1750 and 2000, otherwise power received from L1 to N1. CONTROLLER SUPPLY POWER X10-1 X10-3...
  • Page 39 SYSTEM SUPPLY SENSOR WIRING (HYDRONIC & VOLUME WATER) SYSTEM Pennant ( 500-2000 ) TB1-14 Page 39 SUPPLY SENSOR TB1-15 MIXING VALVE TB2-16 0-10 VDC TB2-26 24 VAC TB2-25 COMMON TB2-15 MIXING VALVE REQ'D FOR LOW TEMP OPERATIONS SIZE (MBTU/h) oltage Legend...

  • Page 40: Section 6 Touchscreen And System Ops

    NOTE: The heat demand set point will Inlet & Outlet Temperature. DHW Temp (if installed). System: turn green in color when active DHW: Boiler Status Pennant Status: B1: Running • Burner Bank 1 B2: Running • Burner Bank 2 • Staging (on/off) Stage 1: •...

  • Page 41: Home Screen Active Icons

    Pennant ( 500-2000 ) Page 41 6.A.2 Home Screen Active Icons Name Icon Description Displays the current lock status. Touch the lock icon to lock or unlock the Security Touchscreen Display. See Section 6.B on page 42 Quick Start Provides quick touch access to the most commonly used parameters for easy installation.

  • Page 42: Blogin, Lock / Unlock Display Screen

    LAARS Heating Systems Page 42 6.B Lock / Unlock Display Screen Password Protection: To change parameters, a password is required. The control system includes three levels of password protection. Touch the 'Current Lock Status' Icon. Current Lock Status To Logout Walk Away Result Screen 1. Sign in Screen - USER Password: Non-critical adjustments and functions.

  • Page 43: C Keypad Operations

    Pennant ( 500-2000 ) Page 43 6.C Keypad Operations As you navigate in, you find that all screens have either a numeric keypad to enter in your customizable parameters OR selection buttons to choose the options for your configuration. NOTE: You can always tell exactly where you have navigated to Navigation Bar.

  • Page 44: D Quick Start

    LAARS Heating Systems Page 44 6.D Quick Start Touching CH1 navigates to the CH1 Quick Start To navigate to the Quick Start Screen, touch the Screen Quick Start Icon in the lower left-hand portion of the Home Screen. 6.D.1.a Screen 4. Home Screen Screen 7.

  • Page 45: Dhw/Dhw3

    Pennant ( 500-2000 ) Page 45 6.D.2 DHW/DHW3 temperature at which the Pennant will maximize the To navigate to the DHW/DHW3 Quick Start boiler outlet temperature to the Maximum Water Screen, touch the DHW faucet icon on the Quick Start Temperature.

  • Page 46: Anti-Short Cycle

    • Cycle Time – The amount of time after a heat demand is satisfied that the Pennant will wait to satisfy the next active heat demand. NOTE: Anti-Short Cycle Time does not apply to DHW/DHW3 heat demands.

  • Page 47: E Configure Screen

    • Demand Priority – This allows the user to prioritize the heat demand, such as DHW before CH. From the Configure Screen, the Pennant The higher the number, the higher the priority. See functionality can be configured for the specific Table 13 on page 48 application/installation.
  • Page 48 Stage Off Hysteresis – the temperature at which Temperature Control the next stage turns off. Each stage has an The Pennant stages on & off burners to satisfy heat off hysteresis associated with it. demands. Staging control is designed to operate up to Stage On Hysteresis –...
  • Page 49 Using a set point of 180°F and the default values for each stage on and off hysteresis, this table shows the temperatures at which stages 1 and 2 will turn on/off for a Pennant 500/750. Table 16. Temperature Differential Staging of a 2 Stage Pennant Using a set point of 180°F and...

  • Page 50: E.1.B Additional Settings

    NOTE: By default, the control sensor is the while DHW2 applies to volume water units (water heaters). Pennant outlet sensor, or when installed, the system supply sensor. The PID control algorithm gives an output signal from 0 – 100% and makes a decision to turn a stage on/ off based on the table below.

  • Page 51: Dhw/Dhw3

    180 °F, however, due to the OAT, the CSP is 140 °F – DHW/DHW3 has all the same parameters as CH1/ which is the temperature the Pennant will control to. DHW1 and CH2/DHW2 with one exception. DHW/ DHW3 has the following additional parameter for adjustment: •...
  • Page 52 LAARS Heating Systems Page 52 Figure 27. Boiler Status Window. CSP with an active outdoor reset condition Outdoor Reset Outdoor Temperature Table 18. Outdoor Reset Curve.

  • Page 53: Cascade

    A maximum of to the Cascade Parameters Screen, shown below, and set the Address to “0”. The Pennant is now configured 8 units can be configured in a cascade installation. as the lead boiler/heater. Setting the address to a “-1”...

  • Page 54: E.5.B Configure Lag Unit

    “Lag On Hysteresis” and “Lag Off Hysteresis” set at each individual lag unit. A message To configure a Pennant as a lag unit, navigate will indicate when a unit is off due to a 'Max Lag to the Cascade Parameters Screen, shown below, Temp' condition.

  • Page 55: E.5.C Cascade Ch

    Pennant ( 500-2000 ) Page 55 individual boiler servicing as it will remove the boiler/ heater from cascade operations. Click into Dynamic Address and set this parameter to -1. When finished, return this number to it's previously assigned number. • Lead Settings – This button is only selectable when configured as the lead boiler/heater.

  • Page 56: E.5.D Cascade Dhw

    Screen 30. Cascade Rotation Screen The Cascade Rotation Screen is a view only Cascade DHW has the same parameters and setup screen. This screen indicates how many Pennant as Cascade CH units are connected in a cascade configuration, the NOTE: Cascade DHW applies to volume water order in which each unit will run, and the percent at (water heaters) units only.

  • Page 57: E.5.F Cascade Redundancy

    Option 1: Boiler Internal Set Point – With this option selected, in a cascade configuration, upon loss of communication with the lead Pennant, the lag units will continue to operate. When running in this mode, the lag boiler will use the “Loss Lead Backup Set Point"...

  • Page 58: B.2

    LAARS Heating Systems Page 58 6.E.6 Pumps The Pump Configuration Screen allows adjustment The Pennant allows control of three pumps: boiler/heater pump, system pump, and DHW pump. of the following parameters: Each pump has an adjustable post circulation time that •...

  • Page 59: Temp Limits

    • Priority – This parameter sets the heat demand priority in relation to other heat demands. at which the Pennant will shut down on an outlet temperature manual reset condition. The higher the number, the higher the priority it is assigned.

  • Page 60: E.9.A External - Remote Set Point

    With Firing Rate control mode selected, this is the an active demand, the Pennant will linearize the set minimum rate at which the boiler/heater will run. point according to the analog input signal as shown in The unit of this parameter is %, so if the value of Figure 28.

  • Page 61: E.9.B External Firing Rate

    Demand Off to remove the heat demand. The external analog signal will activate stages based on Table 20. In this control mode, if the Pennant outlet temperature exceeds the Auto Reset High Limit setting, the boiler will shut down and an “Auto Reset High Limit”...

  • Page 62: Setting The Time And Date

    6.E.11.a Mixing Valve. Low Temp Pennant banner on each screen, and the date captured in the date/time stamp for lock-out conditions displayed on Accessable only on Low Temp Pennant models. the history screen. • Year – The month that will be displayed in the...

  • Page 63: E.11.B Anti-Short Cycle

    • Cycle Time – The amount of time after a heat • Enable Feature – This allows the mixing valve demand is satisfied that the Pennant will wait to satisfy to be enabled or disabled. the next active heat demand.

  • Page 64: E.11.E Com Port

    The Warm Weather Configuration Screen allows and 57600. adjustment of the following parameters: • Address – The address of the Pennant on the Modbus network. • Temp Min – Upon an active warm weather shutdown condition, this is the temperature at which •...

  • Page 65: E.11.F Temperature Conversion

    Pennant ( 500-2000 ) Page 65 • Set Point – The temperature at which the Pennant 6.E.11.f Temperature Conversion will apply the Hysteresis value to enable the Anti-Frost mode. To navigate to the Temperature Conversion • Hysteresis – This parameter is a +/- offset of the...

  • Page 66: F Service Screens

    This screen will only display the number of stages associated with the size of the unit. For example, Pennant sizes 500/750 have two stages, size 1000 has three stages, and sizes 1250/1500/1750/2000 have four stages. Low-Temp units are On/Off units only.

  • Page 67: Analog I/O

    Screen Button on the Service Screen. Screen 50. Analog I/O Screen - Inputs Screen 52. Screen Settings Screen NOTE: Pennant does not use a flue stack sensor. There are two adjustable screen settings: Light Timeout and AutoLock Timeout. Light Timeout There are two screens associated with the Analog I/O, the Analog I/O Screen –...

  • Page 68: History

    The Pennant control accumulates and displays the number of heat demand cycles, burner cycles, and pump cycles. It displays Messages and USB the 10 most recent lock-out conditions, and Pennant temperature and firing statistics. 6.G.1 Messages 6.F.6...

  • Page 69: Usb Functionality

    Pennant ( 500-2000 ) Page 69 6.G.2 USB Functionality values in 1 boiler instead of upwards of 8 boilers. The Display has a USB port that can be used to Upload Parameters from the boiler: This feature perform the following tasks: a.

  • Page 70: H Active Demands

    LAARS Heating Systems Page 70 6.H Active Demands The Navigation Bar The Navigation Bar is a touch sensitive area at the The Active Demand Window indicates the status of active heat demands. top left of every screen, that shows you where you are at any time as you navigate into and out of the touchscreens.

  • Page 71: Section 7 Sequence Of Operation

    If transitions to HSI Warmup. If the APS remains open, there is a loss of flame during Run mode, the Pennant or if there is a separate lock-out condition, the Pennant will transition to Inter-Purge mode.

  • Page 72: C Shutting Down The Pennant

    HSI is off, and the gas valves are off. The will transition to Post-Purge prior to returning to Standby. Pennant blower will stay on for 30 seconds. The lock- out condition will remain until it has been manually reset. Once reset, the Pennant will transition to Post-Purge Standby mode.

  • Page 73: Section 8 Burner Set Up

    Pennant appliances may be operated at high altitude 5. The Pennant will enter the start sequence, as long (7700 ft., 2347 m) with a reduction in output of approx- as the unit is being called for heat. The blower and imately 10%.
  • Page 74 LAARS Heating Systems Page 74 removing the slotted cap on the gas valve and turning the adjustment screw (beneath the cap) clockwise to increase pressure and replaced after the adjustments have been completed and the fitting, hose and manometer have been removed and the 1/8" plug has been replaced.

  • Page 75: Section 9 Maintenance

    6 months. Float type low water cutoff should 9.B.2 Filter be flushed periodically. The filter used in the Pennant is washable with 7. Inspect flue passages, and clean with brushes/ an 83% arrestance. Since the filter is washable, it will vacuums, if necessary.

  • Page 76: Automatic Reset High Limit Control

    LAARS Heating Systems Page 76 9.B.5 Automatic Reset High Limit Control When used, an automatic reset high limit switch has an adjustable set point, up to 240°F (116°C) on boiler models and 200°F (93°C) water heater models and boilers ordered with low temperature controls. To replace the switch, shut off the 120-volt power to the appliance.

  • Page 77: Ignitors

    They are energized whenever there is a call for heat WARNING and switched off when ignition is established and the Black carbon soot buildup on a dirty heat flame has been sensed. Pennant sizes 500 and 750 have exchanger can be ignited by a random spark or one ignitor. Sizes 1000 to 2000 have two ignitors. To flame, thereby creating a risk of fire or explosion..

  • Page 78: Section 10 Trouble Shooting

    The odor may result from an improper gas/air ratio (high or low O or CO ). Pennant appliances operate best with 45% excess air (8% CO on natural gas, 9.2% on LP). Check the CO of the appliance and adjust if necessary.

  • Page 79: Delayed Ignition - Possible Causes

    5" to 13" representative to discuss possible remedies. w.c. (1.2 to 3.2 kPa) With the Pennant running with all stages firing, set the air box pressure to 1.5" w.c. 10.D Short Cycling — Water Heater (0.37 kPa) (as a starting point), by adjusting the air...

  • Page 80: T Roubleshooting Errors And Lockouts

    LAARS Heating Systems Page 80 Error Description Corrective Action 10.F Troubleshooting Flow Switch Insufficient flow at • Faulty boiler/heater pump – replace pump. the outlet of the • Faulty pump contactor – replace contactor. Errors & Lockouts boiler/heater. • Blown boiler/heater pump fuse – replace fuse F14 on the control board. Low Water Cut Insufficient water • Reset the LWCO from the reset button on the LWCO module. level in the • Verify the system is full of water and all air has been purged from the boiler/heater heat system. exchanger. •...
  • Page 81 Pennant ( 500-2000 ) Page 81 Error Description Corrective Action Flow Switch Insufficient flow at • Faulty boiler/heater pump – replace pump. Burner1 APS Burner1 air proving • Check the wiring connections to the switch. The wires should be (cont) the outlet of the Switch switch contacts are • Faulty pump contactor – replace contactor. connected to the common and normally open terminals. boiler/heater. open. • • Blown boiler/heater pump fuse – replace fuse F14 on the control Check reference hose and tubing connected to the pressure switch board. for blockage/obstruction. Low Water Cut Insufficient water •...

  • Page 82: P Arameter Tables

    LAARS Heating Systems Page 82 10.G Parameter Tables PNCH PNCH 10.G.1 Boiler Maximum Maximum Default Default Minimum Minimum (Including Low Temp) (Including Low Temp) (including Low Temp) Time & Date Hour Minute Month Year CH1 Enable/Disable Disable Enable Enable CH1 Setpoint 120 F 240 F 180 F CH1 Priority CH1 Control Mode Temp Differential...
  • Page 83 Pennant ( 500-2000 ) Page 83 PNCH PNCH Boiler continued Maximum Maximum Default Default Minimum Minimum (Including Low Temp) (Including Low Temp) CH2 Proportional Gain 32767 Time & Date 32767 CH2 Integral Time Hour CH2 Derivative Time 32767 Minute Month DHW Enable/Disable Disable Enable Disable DHW Setpoint 120 F 200 F 180 F...
  • Page 84 LAARS Heating Systems Page 84 PNCH PNCH Maximum Maximum Default Default Boiler continued Minimum Minimum (Including Low Temp) (Including Low Temp) Lag Mode Enable/Disable Disable Enable Disable Time & Date Hybrid Setpoint 82 F 181 F 130 F Hour Hybrid Differential Temperature 21 F 10 F Minute Hybrid Delay Time 0 min 720 min 30 min Month...
  • Page 85 Pennant ( 500-2000 ) Page 85 PNCH PNCH Boiler continued Maximum Maximum Default Default Minimum Minimum (Including Low Temp) (Including Low Temp) BACnet Time & Date Baudrate 9600 76800 76800 Hour Address Minute Device Model Name Month Device Object Name Object Instance 4194303 600000 Year Timeout 0 secs 300 secs 300 secs...

  • Page 86: W Ater Heater Parmeters (Including Low Temp)

    LAARS Heating Systems Page 86 PNCV PNCV 10.G.2 Heater (including Low Temp) Minimum Minimum Maximum Maximum Default Default (Including Low Temp) (Including Low Temp) Time & Date Hour Minute Month Year DHW1 DHW1 Enable/Disable Disable Enable Enable DHW1 Setpoint 120 F 200 F 140 F DHW1 Priority...
  • Page 87 Pennant ( 500-2000 ) Page 87 PNCV PNCV Heater continued Minimum Minimum Maximum Maximum Default Default (Including Low Temp) (Including Low Temp) 0 secs 120 secs 0 secs DHW2 Stage Delay Off Time Time & Date DHW2 Minimum Stage On Time 0 secs 120 secs 10 secs Hour DHW2 Minimum Stage Off Time 0 secs 120 secs 10 secs Minute DHW2 PID On Hysteresis 21 F 20 F...
  • Page 88 LAARS Heating Systems Page 88 Heater continued Cascade Redundancy Boiler Internal Boiler Internal Set Loss of Lead Setup Disable Setpoint/ point Redundant Lead Hybrid Disable Enable Disable Hybrid Enable/Disable Lag Mode Enable/Disable Disable Enable Disable 82 F 181 F 130 F Hybrid Setpoint Hybrid Differential Temperature 21 F 10 F 0 min 720 min 30 min Hybrid Delay Time...
  • Page 89 Pennant ( 500-2000 ) Page 89 Heater continued 10 secs 240 secs 60 secs Cycle Time Temperature Conversion Conversion Unit Celsius Fahrenheit Fahrenheit BACnet 9600 76800 76800 Baudrate Address Device Model Name Device Object Name 4194303 600000 Object Instance Timeout 0 secs 300 secs 300 secs Mixing Valve Anti- Condensing (Low Temp Models ONLY)

  • Page 90: Modbus Memory Map

    Read Only Analog Output 1 Read Only Analog Output 2 Read Only Analog Output 3 LAARS Heating Systems Page 90 Read Only Analog Output 4 Read Only Not used Read Only Not used 10.G.3 Modbus Memory Map Blower 1 Speed 0 -> Off Read Only MODBUS MODBUS 1 -> Low Address Address Type Read/Write Value Type Read/Write Value 2 -> High Read Only Inlet Temp Read Only Inlet Temp Blower 2 Speed 0 -> Off Read Only Outlet Temp...
  • Page 91 Read/Write Not used Read Only 1 -> Not Available Read/Write DHW Enable/Disable 2-> Available Read/Write DHW Setpoint 3 -> Running Pennant Read/Write DHW P ( 500-2000 ) Page 91 4 -> Locked Out Read/Write DHW I Read Only Slave 3 Firing Rate Slave 4 State Read/Write DHW D 0 -> Not Present Read/Write Not used 1 -> Not Available Read Only Read/Write Not used 2-> Available MODBUS MODBUS Read/Write Cascade Setpoint 3 -> Running Address...

  • Page 92: Bacnet Mstp Memory Map

    Analog Output 4 [mV] Not used [rpm] Not used [rpm] LAARS Heating Systems Page 92 Blower 1 Speed 0 -> Off 1 -> Low 2 -> High 10.G.4 BACnet MSTP Memory Map Blower 2 Speed 0 -> Off BacNet BacNet BacNet BacNet 1 -> Low Address Type Address Type Value Unit Value Unit 2 -> High Inlet Temp [C]/[F] Inlet Temp [C]/[F] HSI1 Current [mA] Outlet Temp...
  • Page 93 2-> Available Cascade D 3 -> Running 4 -> Locked Out Not used Slave 4 Firing Rate Not used Pennant ( 500-2000 ) Page 93 Slave 5 State Not used 0 -> Not Present Not used 1 -> Not Available Hybrid Setpoint [C]/[F] 2-> Available BacNet BacNet BacNet BacNet Hybrid Differential Temp [C]/[F] 3 -> Running Address Type Address Type Value Unit Value Unit Not used 4 -> Locked Out Inlet Temp Slave 5 Firing Rate...

  • Page 94: Section 11 Replacement Parts

    LAARS Heating Systems Page 94...
  • Page 95 Pennant ( 500-2000 ) Page 95...
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  • Page 100: Parts Illustrations

    LAARS Heating Systems Page 100 11.C Parts Illustrations Figure 36. Sheet Metal Components.
  • Page 101 Pennant ( 500-2000 ) Page 101 See Figure 39 on page 103 Electrical Components for detail. Figure 37. Internal Components.
  • Page 102 LAARS Heating Systems Page 102 See pump chart below for pump numbers. Pennant Water Heater with TACO Pump TACO PUMP P/N SIZE Soft Water Normal Water Hard Water A2117201 A2117201 A2117203 A2117201 A2117201 A2117203 1000 A2117201 A2117202 A2117203 Pennant Hydronic Boiler 1250 A2117201 A2117202 A2117203 TACO B&G SIZE PUMP P/N...
  • Page 103 Pennant ( 500-2000 ) Page 103 Figure 39. Electrical Components.
  • Page 104 Pennant ( 500-2000 ) Notes: All Manuals (Install & Operate, Start Up, and Service Manuals) can be downloaded at www.laars.com For LAARS Product and Service VIDEOS h t t p s : / / w w w. y o u t u b e .

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