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CLICK ANYWHERE on THIS PAGE to RETURN to LOCHINVAR HEATER INFORMATION &
MANUALS at InspectApedia.com
INSTALLATION AND SERVICE MANUAL
Installation and service must be performed by a
qualified service installer, service agency or the gas
supplier.
WARRANTY
Factory warranty (shipped with unit) does not apply to
units improperly installed or improperly operated.
Experience has shown that improper installation or
system design, rather than faulty equipment, is the
cause of most operating problems.
1. Excessive water hardness causing a lime build up
in the copper tube is not the fault of the equipment
and is not covered under the manufacturer's
war ranty. (See Water Treatment and Water
Chemistry)
2. Excessive pitting and erosion on the inside of the
copper tube may be caused by too much water
velocity through the tubes and is not covered by
the manufacturer's warranty (See Boiler Flow
Rates
and Temperature
requirements).
SPECIAL INSTRUCTIONS TO OWNER
NOTE:
Retain this manual for future reference.
This manual supplies information for the installation,
operation and servicing of the appliance. It is strongly
recommended that this manual be reviewed completely
before proceeding with an installation.
WARNING:
Improper
Installation, Adjustment,
Alteration, Service or Maintenance
can cause injury or property damage.
Refer to this manual. For assistance or
additional information consult a qualified
installer, service agency or the gas supplier.
Hot Water Heating Boilers
Domestic Hot Water Supply Boilers
300,000 and 990,000 — 2,070,000 • BTU Models
Rise
for
flow
CHECKING EQUIPMENT
Upon receiving equipment, check for signs of shipping
damage. Pay particular attention to parts accompanying
the boiler which may show signs of being hit or
otherwise being mishandled. Verify total number of
pieces shown on packing slip with those actually
received. In case there is damage or a shortage,
immediately notify the carrier.
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.
WARNING:
If the information in this manual is not followed
exactly, a f ire 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 electric switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbors 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
qualif ied installer, service agency or the gas
supplier.
1
CHF2-i&s-02
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Related Manuals for Lochinvar CHF2
Summary of Contents for Lochinvar CHF2
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Page 1: Warranty
CLICK ANYWHERE on THIS PAGE to RETURN to LOCHINVAR HEATER INFORMATION & MANUALS at InspectApedia.com CHF2-i&s-02 INSTALLATION AND SERVICE MANUAL Hot Water Heating Boilers Domestic Hot Water Supply Boilers 300,000 and 990,000 — 2,070,000 • BTU Models Installation and service must be performed by a... -
Page 2: Table Of Contents
OWNER WARNING CONTENTS The information contained in this manual is Warranty ................1 intended for use by qualified professional installers, Safety Warnings ..............1 service technicians or gas suppliers. Consult your Codes ................2 local expert for proper installation or service Location ................ -
Page 3: Location
Safety Code for Controls and Safety Devices for The pan must not restrict combustion air flow. Automatically Fired Boilers, ASME CSD-1. All boilers Under no circumstances is the manufacturer to be conform to the latest edition of the ASME Boiler and held responsible for waterdamage in connection Pressure Vessel Code, Section IV. -
Page 4: Clearances
Maintain minimum specified clearances for adequate TABLE — A operation. Allow sufficient space for servicing pipe COMBUSTIBLE FLOOR KITS connections, pump and other auxiliary equipment, as Input Btu/hr Kit Number well as the appliance. See rating plate for specific 300,000 CFK3300 service clearance requirements. - Page 5 b. Ventilation air opening, with a minimum free Combustion Air from area of one square inch per 4000 Btu input Outside Single Opening (5.5cm 2 per kW). This opening must be located within 12" (30cm) of the top of the enclosure.
- Page 6 TABLE — B MINIMUM RECOMMENDED COMBUSTION AIR SUPPLY TO BOILER ROOM Combustion Air Source Boiler Input Outside Air*/2 Openings Outside Air*/1 Opening Inside Air/2 Openings 300,000 75 in (484cm 100 in (645cm 300 in (1936cm 990,000 248 in (1600cm 330 in (2129cm 990 in (63886cm...
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Page 7: Conventional Venting
Vent connection is made directly to the top of the unit. VENT SYSTEM OPTIONS No additional draft diverter or barometric damper is required on single unit installations with a dedicated This boiler has f ive venting options. They are: stack and a negative draft within the specified range (1) Conventional Negative Draft Venting with vertical of a negative 0.02 to 0.08 inches water. - Page 8 per foot (21 mm/m) from the appliance to the vent (f) After it has been determined that each appliance terminal. Follow manufacturers instructions. remaining connected to the common venting system properly vents when tested as above, Do not use an existing chimney as a raceway if another return doors, windows, exhaust fans, fireplace appliance or fireplace is vented thru the chimney.
- Page 9 Vent Termination from Peaked Roof Vent Termination from Flat Roof More Than 10’ from Ridge More Than 10’ from Parapet Wall 10’ OR LESS 3’ NOTE: NO HEIGHT ABOVE PARAPET FIG. 11 REQUIRED WHEN DISTANCE FROM WALL OR WALLS OR PARAPET CHIMNEY PARAPETS IS...
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Page 10: Sidewall Venting
MASONRY CHIMNEY SIDEWALL VENTING WITH A INSTALLATION POWERED VENT CAP A masonry chimney must be properly sized for the The Sidewall Venting System installation of a high efficiency gas fired appliance. Venting of a high efficiency appliance into a cold or This venting system uses a powered vent assembly oversized masonry chimney can result in operational which pulls the flue products out of the stack. - Page 11 The sidewall f an/powered vent cap MUST be Sidewall Venting Installation interlocked with the units control system to start with and Induced Draft Fan the fan on a call for heat and prove fan operation and Sidewall Vent before the boiler fires. Plug-in and terminal strip connections are provided on the unit for easy connection of the factory supplied vent kit and control package for the sidewall vent fan.
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Page 12: Vertical Directaire
The sidewall vent cap should have a minimum clearance A CONVENTIONAL VERTICAL of 4 feet (1.22m) horizontally from and in no case above NEGATIVE DRAFT VENTING SYSTEM or below, unless a 4 foot (1.22m) horizontal distance is maintained from electric meters, gas meters, regulators WITH A COMBUSTION AIR PIPE and relief equipment. - Page 13 Vertical DirectAire™ Installation Vertical DirectAire™ Installation with Sidewall Combustion Air with Roof Top Combustion Air FIG. 18 FIG. 16 Sidewall Air Inlet Vertical Roof Top Air Inlet The sidewall air inlet cap is supplied in the Vertical The air inlet cap for the vertical roof top air inlet is DirectAire Sidewall Air Kit which must be ordered supplied in the Vertical DirectAire Roof Top Air Kit from the manufacturer.
- Page 14 Incorrect installation and/or location of the air inlet NOTE: The use of double wall vent cap can allow the discharge of flue products to be drawn material for the combustion air inlet pipe is into the combustion process on the boiler. This can recommended in cold climates to prevent the result in incomplete combustion and potentially condensation of airborne moisture in the...
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Page 15: Horizontal Directaire
operational problems with the boiler or potentially HORIZONTAL DIRECTAIRE™ hazardous spillage of flue products which can cause WITH A SIDEWALL FLUE AND personal injury, death or property damage. SIDEWALL AIR INLET Venting of Flue Products The Horizontal DirectAire Vent System Follow all requirements in the General Venting section For venting flue products vertically to the outdoors, and Sidewall Venting for venting flue products to the... - Page 16 Locate units as close as possible to sidewall where the Length of Air Inlet Pipe combustion air supply system will be installed. The total equivalent length of the Horizontal To prevent recirculation of flue products from an DirectAire combustion air inlet pipe must not exceed adjacent vent cap into the combustion air inlet, follow a maximum of 50 (15.24m) equivalent feet in length.
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Page 17: Outdoor Installations
Venting of Flue Products WARNING: Outdoor models MUST be installed outdoors and MUST use the vent cap For venting flue products horizontally to the outdoors, supplied by the manufacturer. Personal injury follow all requirements in the installation instructions or product damage may result if any other cap is for sidewall venting. -
Page 18: Gas Supply
The combustion air inlet of the outdoor cap must be The Outdoor Vent Cap Kit located at least one foot (0.30m) above grade and above normal snow levels. The required outdoor cap part numbers are listed by unit size. The venting kit must be furnished by the The unit must be at least 10 feet (3.05m) away from manufacturer in accordance with CSA International any forced air inlet. -
Page 19: Gas Pressures & Piping
MANIFOLD PRESSURE: Measured at the pressure 6. The combination gas valve has an integral vent tap on the downstream side of the combination gas limiting device and does not require venting to valve. The gas regulator on the boiler’s combination atmosphere, outside the building. - Page 20 TABLE — L MULTIPLE UNIT INSTALLATIONS GAS PIPING SIZE CHART Maximum Capacity of Pipe in Thousands of BTU's per hour for gas pressures of 14 Inches Water Column (0.05 PSIG) or less and a pressure drop of 0.05 Inch Water Column (Based on NAT GAS, 1025•BTU's per Cubic Foot of Gas and 0.60 Specific Gravity). Install Piping to Control GAS PIPING 1.
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Page 21: Manifold Pressure Adjustment
6. Apply a moderate amount of good quality pipe Manifold Gas Pressure Measurement compound (DO NOT use Teflon tape) to pipe 990,000 — 2,070,000 Btu/hr Models only, leaving two end threads bare. 7. Remove seal over gas inlet to boiler. 8. -
Page 22: Supply Pressure Measurement
4. Remove the 1/8" hex plug, located on “inlet” side NOTE: Adjustment fitting is plastic of the gas valve. An inlet pressure tapping is and may require slightly greater turning force located on the top side of the valve body, beside than a metal fitting. -
Page 23: Water Connections
17. Turn the gas valve knob to the “ON” position. Inlet and Outlet Connections 18. Set the electronic temperature control or For ease of service, install unions on inlet and outlet thermostat to call for heat. If proper ignition and of the unit. -
Page 24: Gas Valves
Venting of Combination Gas Valves LOW WATER CUTOFF (IF EQUIPPED) The combination gas valve/regulator used on all models If this boiler is installed above radiation level, a low is equipped with an integral vent limiting orifice per water cut-off device must be installed at the time of ANSI Z21.78. -
Page 25: Temperature Adjustment (Boiler)
manual reset function is available. A small red reset TABLE — M button, located beside the knob, must be pushed DRAW DATA whenever water temperature has exceeded the set point 300,000 through 2,070,000 of the manual reset limit. Btu/hr Models Btu/hr Controls Approximate... - Page 26 Component Location Drawing of Control Panel 990,000 - 2,070,000 Btu/hr Models FIG. 31 Select Key - Sequentially prompts the user as to what Electronic Temperature Control, LCD parameter is being displayed: set point, differential, Display and Programming Keys T775 stage energized, operation mode (heat), indication of assigned stage (1,2,3).
- Page 27 SETUP OF THE DISPLAY TEMPERATURE CONTROLLER Once power is applied to the temperature controller, Each stage on the controller has its own independent the display will count down from 210 until the display set point and differential which are determined by reads zero.
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Page 28: Temperature Adjustment (I/O Reset)
4. Press Select to display the current stage set point. PROGRAMMING WORKSHEET 5. Press Up Arrow key to increase or Down Arrow Stage 1: key to decrease to the desired set point. Set Point 1 ___________ Off at __________ Differential 1 ________ On at __________ 6. - Page 29 on outdoor temperature. Operation as a reset controller Up and Down Arrow Keys - Allow the displayed is based on temperature input from two sensors, one parameter to be increased or decreased. After pressing immersion sensor for boiler water and one for outdoor the Select key, a control value can be changed by using air reset.
- Page 30 This selection is accomplished by stopping at “Sensor degrees difference between the set point of each stage A” or “Sensor B” sensed temperature points in the to sequence individual stages on as required by Select key scrolling loop. To lock on to either sensor, demand.
- Page 31 5. Press Up Arrow key to increase or Down Arrow ° ° ° ° - (-10 ) = 80 key to decrease to the desired set point. ° ° ° ° - 140 6. Press Enter to enter the displayed value into memory.
- Page 32 The electronic temperature control has three options 4. Do not locate temperature sensor wiring near for displaying the sensed temperatures. welding equipment. 1. Sensor A only. 5. Make sure good mechanical connections are made 2. Sensor B only to both the sensor, any interconnecting wiring and 3.
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Page 33: Temperature Limit Control
EF- EEPROM Failure High Water Temperature Limit Control The values read form the EEPROM are not the same as the values written into the EEPROM. This 990,000 through 2,070,000 Btu/hr models error cannot be field repaired. Replace the boiler’s electronic temperature control. An adjustable high limit control is located behind the front control panel, beside the temperature control and CF - Calibration Failure... - Page 34 Never use tools. If the knob will not turn by 7. Wait f ive (5) minutes to clear out any gas. If hand, don’t try to repair it, call a qualified service you smell gas, STOP! Follow “B” in the safety technician.
- Page 35 WARNING: Combination Gas Valve for 990,000 — 2,070,000 Btu/hr Models Should overheating occur or the gas fail to shut off, turn off the manual gas control INLET INLET valve to the appliance. PRESSURE PRESSURE REGULATOR ADJUSTMENT (UNDER CAP SCREW) IGNITION SYSTEM CHECKOUT 300,000 Btu/hr Models REFERENCE 1.
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Page 36: Ignition Module
9. If ignition system fails to operate properly, HOT SURFACE IGNITION CONTROL MODULE repair work must be performed by a qualif ied serviceman or installer. Ignition Module Lockout Functions HOT SURFACE IGNITION SYSTEM The ignition module(s) may lockout in either a hard lockout condition requiring pushing of the reset button to recycle the control or a soft lockout condition which may Hot Surface Ignition... -
Page 37: Operation & Diagnostic Lights
out. The control panel contains the ignition module, transformer Status LED Diagnostic Codes for the 24 VAC control circuit, circuit breaker for the control Code Sequence Condition circuit (990,000 through 2,070,000 Btu/hr models only), Constant ON - System OK, no faults present. switching relays for component operation and wiring harness Constant OFF - Possible control fault, check power;... - Page 38 TABLE — O TABLE — P OPERATION and DIAGNOSTIC LIGHTS Status LED Diagnostic Codes Indicating Function Light Code Power On - Power switch in on position Sequence Condition Flame Failure - Ignition module unable to properly prove ignition Indicating Light Function Burner On - Burners operating...
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Page 39: Ignition & Control Timings
2. Location - Indoor boilers and hot water supply IGNITION and CONTROL TIMINGS boilers must be located in a room having a temperature safely above freezing [32° F(0° C)]. F-9 Proven Pilot Hot Surface Ignition Models - 300,000 Btu/hr 3. Caution - A mechanical room operating under a Single Hot Surface Ignition Module negative pressure may experience a down draft in Prepurge - 15 Seconds... -
Page 40: Maintenance
3. Follow the instructions from the antifreeze WARNING: manufacturer. Quantity of antifreeze required is The area around the burner viewport is hot and based on total system volume including direct contact could result in burns. expansion tank volume. 4. Glycol is denser than water and changes the Flame Pattern Illustration viscosity of the system. -
Page 41: Burner Cleaning
k. Remove inner jacket panel mounting screws BURNER REMOVAL and CLEANING and slide burner/door assembly out toward front of the boiler. Use caution to prevent damage to a. Turn off main power to boiler. the refractory and hot surface ignitor. b. -
Page 42: Combustion Air Adjustment
7. Check frequently to be sure the flow of combustion COMBUSTION AIR ADJUSTMENT and ventilation air to the boiler is not obstructed. 300,000 Btu/hr Model 8. This boiler uses a transformer to supply a low ADJUSTING SCREW voltage control circuit. The voltage on the secondary side should be 24 to 28 VAC when measured with a volt meter. - Page 43 connecting them to either side of a manometer, you 2. Adjust the air shutter on the left fan until can read the differential pressure to the switch. This the differential pressure is 1.35 inches water procedure and the noted pressure requirements are column.
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Page 44: Gas Train
4. Adjust the air shutter on the right fan until PIPING OF THE BOILER SYSTEM the differential pressure is 1.35" w.c. Note: the left and center fans must be running The drawings in this section show typical boiler as you set the right fan. Also, the ∆P of p i p i n g i n s t a l l a t i o n s . -
Page 45: Pressure Drop Chart
proper operation. A pump should be selected to CIRCULATOR PUMP achieve proper system design water temperature SPECIFICATIONS rise. A heat exchanger head-loss chart (FIG. 48 & 49) is provided to assist in proper pump selection. Also provided is a System Temperature Rise Chart (Table S). -
Page 46: Primary/Secondary Piping
Primary/Secondary Piping PRIMARY/SECONDARY BOILER PIPING of Multiple Boilers EXPANSION TANK Primary/Secondary Piping MAKE-UP WATER of a Single Boiler MAKE-UP LWCO SYSTEM WATER (OPTIONAL) SYSTEM PUMP 12” SEPARATOR EXPANSION TANK SYSTEM LWCO FROM SYSTEM (OPTIONAL) SYSTEM SECONDARY FIG. 51 PUMP BOILER PUMP SECONDARY 12”... -
Page 47: Three Way Valves
the cooler boiler return water to increase the boiler THREE WAY VALVES inlet temperature above 140°F (60°C). This should p r eve n t t h e p r o d u c t s o f c o m b u s t i o n f r o m Boiler Piping with a 3-Way Valve condensing in most installations. -
Page 48: Boiler Flow Rates
The installer must insure that the boiler is supplied MAXIMUM REQUIRED FLOW with adequate flow without excessive temperature FOR HEATING BOILER rise. It is recommended that this boiler be installed w i t h a by p a s s i n t h e p i p i n g i f t h e m a x i m u m recommended flow rate is exceeded. - Page 49 1. Close all drain cocks and air vents. 11. Recheck the water level in the expansion tank. If it exceeds half the tank volume, open the tank 2. Open the makeup water valve and slowly f ill to reduce the water level. Recheck pressure the system.
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Page 50: Boiler Temperature Control
Remove the jumper between the R and W terminals BOILER OPERATING on the terminal strip. Refer to the chart in this TEMPERATURE CONTROL section to determine maximum allowable length and The operating temperature control for the 300,000 wire gauge recommended to connect the switching Btu/hr model is located on the control panel, inside contacts of the remote thermostat to the R and W of the top of the unit. -
Page 51: Domestic Hot Water Supply Boiler/Water Heater
DOMESTIC HOT WATER EXTERNAL ENERGY MANAGEMENT SUPPLY BOILERS SYSTEM CONNECTION TO TERMINAL 300,000 and 990,000 - 2,070,000 STRIP FOR CONTROL OF STAGE Btu/hr Models FIRING OF BURNERS ON 990,000 This section applies only to those units used to supply THRU 2,070,000 BTU/HR MODELS potable hot water for domestic use. -
Page 52: Temperature Rise
3. Turn the water heater or hot water supply boiler REQUIRED TEMPERATURE RISE on and allow time for the temperature to stabilize. Record the difference between the Based on heating potable water with a hardness of inlet and outlet temperatures. This difference 5 to 25 grains per gallon and/or total dissolved will be the “temperature rise.”... -
Page 53: Piping Requirements
Typical Water Heater Piping PUMP OPERATION with Storage Tank 1. The water heater or hot water supply boiler must COLD WATER SUPPLY be connected to a properly sized pump that WATER EXPANSION TANK SUPPLY circulates water between the heater and storage (If Required) tank. -
Page 54: Temperature Adjustment
FIG. 59 Water temperature over 125ºF can cause severe burns instantly or death from scalds. Children, disabled and elderly are at highest risk of being scalded. See instruction manual before setting temperature at heating appliance. Feel water before bathing or showering. If this appliance is used to produce water that could scald if too hot, such as domestic hot water use, adjust the outlet control (limit) or use temperature limiting... - Page 55 300,000 Btu/hr Models: DOMESTIC HOT WATER This unit is equipped with an adjustable immersion TEMPERATUARES thermostat to control potable water temperatures. The thermostat is adjusted to a low test setting when This unit has an adjustable temperature control to shipped from the factory. Turn the temperature maintain the desired water temperature set point.
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Page 56: Temperature Limit Control
WARNING: CATHODIC PROTECTION Should overheating occur or the gas fail to shut Hydrogen gas can be produced in a hot water system off, turn off or disconnect the electrical supply that has not been used for a long period of time to the pump. - Page 57 Component Location Drawing 300,000 Btu/hr Models FIG. 61 Component Location Drawing 990,000 through 2,070,000 Btu/hr Models FIG. 62...
- Page 58 NOTES...
- Page 59 NOTES...
- Page 60 CP—5M—5/01—Printed in U.S.A.
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