Lochinvar 1.5, 3.5, 2.5 service manual Pumps

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1 Service

Minimum Next On Time

In order to reduce the risk of temperature overshoot with a Cascade, this parameter defines the minimum time delay from starting one unit until the next unit may be started. The installer can adjust this time delay by accessing parameter J8.

Rate % to Switch on Next Boiler

When the Cascade is programmed in the Efficiency Optimization Mode, the currently running boilers must ramp up to a certain firing rate before the next boiler in the Cascade will start. This percentage can be adjusted by accessing parameter J9.

Rate % to Switch off Last Boiler

When the Cascade is programmed in the Efficiency Optimization Mode, the currently running boiler will stop. This percentage can be adjusted by accessing parameter J10.

Number of Boiler Pumps Always On

When multiple Crest boilers are connected in a Cascade, the SMART TOUCH control can keep a minimum number of the boiler pumps running, regardless of how many of the boilers are firing. This is useful in full flow systems where the system flow is provided by the individual boiler pumps. This number can be adjusted by accessing parameter J11.

K: Pumps

Boiler Pump Delay

The SH pump delay parameter sets the length of time the boiler pump will run after a SH demand has been satisfied. This parameter is adjustable by the installer by accessing parameter K1.

Boiler Pump Anti-Seize Time

If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of time it runs is determined by parameter K2.

Boiler Pump Mode

The SMART TOUCH control is able to control the boiler pump in 3 different ways. The options are as follows:

1.ON with a call for heat, with a constant speed.

2.ON with a call for heat, with a variable speed output.

3.Always OFF (not connected).

The Boiler Pump Mode can be adjusted by accessing parameter K3.

Service Manual

System Pump Mode

The SMART TOUCH control is able to control the system pump in 5 different ways. The options are as follows:

1.ON with a call for heat, with a constant speed.

2.ON with a call for heat, with a variable speed input.

3.Always ON, with a constant speed, except during outdoor shutdown.

4.Always ON, with a variable speed input, except during outdoor shutdown.

5.Always OFF (not connected).

For options 2 and 4, the speed of the system pump is controlled by a separate control system. The System Pump Mode can be adjusted by accessing parameter K4.

System Pump Delay

The system pump delay parameter sets the length of time the system pump (if connected) will run after a SH demand has been satisfied. This parameter is adjustable by the installer by accessing parameter K5.

System Pump Anti-Seize Delay

If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of time it runs is determined by parameter K6.

HWG Pump Delay

The HWG pump delay parameter sets the length of time the HWG pump (if connected) will run after a HWG demand has been satisfied. This parameter is adjustable by the installer by accessing parameter K7.

HWG Pump Anti-Seize Delay

If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of time it runs is determined by parameter K8.

ΔT Set Point

The SMART TOUCH control includes a 0 - 10Vdc output for controlling the speed of a variable speed boiler pump. The speed is regulated in order to, among other things, maintain a minimum delta T across the heat exchanger. This helps reduce the electrical consumption of the boiler pump when the boiler is firing at less than its maximum rate. (This feature is active only when a system supply sensor is installed). This set point can be adjusted by accessing parameter K9.

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Contents Models 1.5 2.0 2.5 3.0 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler What is in this manual? ServiceMaintenance TroubleshootingService Boiler pipingHome Screen Smart Control Module Control inputsControl outputs StripAccess modes General OperationHow the boiler operates How the control modules operateTo adjust and save parameters reference FIG Sequence of operation Sub Parameter Name See Min Max Default User Installer Value AccessParameter table MenuDelay Ramp BMS Setup Setback HWG Night Pumps Initial Setup Viewable and changeable control parametersSet Points Outdoor Reset Ramp Delay Advanced Setup SH/HWG Night Setback ModBus CascadeCascade Offset Minimum On/Off TimePumps Service Notification Service Notification in MonthsService Notification Running Hours Service Notification CyclesService Cascade Screen 8Cascade ScreenGraph Screen 9Graph ScreenParameter SelectionService History Screen 11History ScreenLockout Faults13History ScreenRuntime History Service Screen 14Service ScreenMaintenance Maintenance and annual startup Service technicianOwner maintenance See the Crest User’s Information Manual for InstructionsMaintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Check flame signalCleaning boiler heat exchanger Review with ownerTroubleshooting Before troubleshootingCheck the following Check control module fusesTroubleshooting Checking temperature sensors No Pump Low Water Cutoff OpenAnti-cycling Flame FailureIgnition Flame Out Sequence Flame OutRunning Gas Valve / Relay Failure Unit was running and lost the flameAuto Reset Manual ResetHigh Limit High Limit OpenFault Description Corrective Action Louver Proving Sw Open Flue Temp HighDelta T High Outlet TempService Blk Outlet Temp HighRem Ctrl Flt Parameters SavedSwitch Open Sensor OpenSensor Shorted Flue SensorTemperature Burner SupplyDifferential Resets Try Later Internal FaultToo Many Writing toWatch Dog Error No Error StoredWrite EEProm CRC ParametersCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureGas valve adjustment procedure 2Gas Valve Adjustment Models 1.5Page
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3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

The Lochinvar 1.5, 1.3, and 1.0 models incorporate cutting-edge technologies that set them apart from traditional water heaters. One of the most notable features is their use of high-efficiency condensing technology, which extracts maximum heat from the combustion process. This process allows the units to achieve high thermal efficiencies, often exceeding 95%, which not only reduces energy costs but also lowers greenhouse gas emissions.

In terms of design, Lochinvar's models are constructed with durable materials, ensuring longevity and reliability in demanding environments. The stainless steel heat exchanger is a key element that contributes to the durability and performance of the units. This material is resistant to corrosion and scale build-up, enhancing the lifespan of the heater and reducing maintenance requirements.

The Lochinvar 1.5, 1.3, and 1.0 models feature advanced control systems that provide precise temperature management and easy operation. The intuitive digital display allows users to monitor performance metrics, temperature settings, and energy consumption with ease. Additionally, these units are equipped with intelligent modulating gas valves that optimize fuel usage based on demand, ensuring efficient operation across various load conditions.

Safety is a priority in the design of Lochinvar's water heaters. The models come with built-in safety features, including flame failure detection, overheat protection, and venting safeguards. These systems work together to ensure the safe operation of the units, giving users peace of mind.

Another characteristic that makes the Lochinvar 1.5, 1.3, and 1.0 models popular among users is their compact design. These units are engineered to fit in tight spaces, making them ideal for installations where space is at a premium. Despite their small footprint, they deliver powerful performance, ensuring that users have access to the hot water they need.

In summary, Lochinvar's 1.5, 1.3, and 1.0 water heating models represent the pinnacle of efficiency, safety, and reliability. With their advanced technologies, durable construction, and user-friendly features, these units are an excellent choice for anyone seeking a high-performance water heating solution.
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