ELECTRICAL WIRING (MILLI-VOLT)

OPERATION OF THERMOSTAT SENSOR

1.Follow millivolt lighting instructions on lighting plate attached to unit or in homeownerʼs manual.

2.With control knob in the “ON” position make sure the ON/OFF switch is in the “OFF” position. See Figure 24.

3.The unit is now being controlled by the thermostat sensor. The sensor will now cycle the burners on and off. You can adjust how often the unit cycles by turning the control knob on the sensor.

ON/OFF

Switch

Control

Knob

THERMOSTATSETTING

 

HIGH

26D3317

LOW

 

T-Stat

Sensor

Figure 24 - Control Knob in “ON” Position and ON/OFF Switch in “OFF” Position

CHECKING SYSTEM OPERATION

The milli-volt system and individual com- ponents may be checked with a milli-volt meter having a 0-1000 mV range. Conduct each check shown in chart below by con- nection meter test leads to terminals as indicated.

 

 

CONNECT

 

 

 

CHECK

TO

METER

THERMOSTAT

METER

 

TEST

TEST

LEADS TO

CONTACTS

READING

 

 

 

TERMINALS

 

SHOULD BE

 

 

 

 

 

 

 

A

COMPLETE

2 & 3

CLOSED

MINIMUM

 

 

SYSTEM

 

 

175

 

 

 

 

 

 

 

B

THERMOPILE

1 & 2

OPEN

MINIMUM

 

 

OUTPUT

 

 

500

 

 

 

 

 

 

 

A.COMPLETE MILLI-VOLT SYSTEM CHECK

(“A” Reading - Thermostat contacts CLOSED - Control Knob “ON” - Main burner should turn ON)

a.If the reading is more than 175 milli-volts and the automatic valve still does not come on, replace the control.

b.If the closed circuit reading (“A” reading) is less than 175 milli-volts, determine cause for low reading, proceed to Section B below.

B.Thermopile Output Reading Check

(“B” Reading - Thermostat contacts OPEN - Main burner OFF)

1.Check gas pressure to the unit. If gas pressure is within minimum and maximum on data plate, then check pilot voltage, 500 milli-volts minimum. If the minimum milli-volt reading is not obtainable, replace pilot.

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Monessen Hearth HVFL18 manual Operation of Thermostat Sensor, Checking System Operation, Complete MILLI-VOLT System Check

HVFL18 specifications

The Monessen Hearth HVFL18 represents a notable innovation in the realm of vent-free fireplaces, designed with both aesthetics and functionality in mind. This unit is an excellent choice for homeowners looking for an efficient heating solution that combines style and convenience in one compact design.

One of the standout features of the HVFL18 is its impressive heat output. This fireplace boasts a maximum of 18,000 BTUs, making it powerful enough to warm various room sizes effectively. The vent-free design allows for maximum efficiency, ensuring that all the heat generated stays within the living space. Additionally, this model uses natural gas or propane, providing flexibility for installation based on the homeowner's preferences and existing connections.

The aesthetic appeal of the Monessen Hearth HVFL18 cannot be overlooked. It is designed with a realistic flame appearance that mimics the look of a traditional wood fire. The unit comes with a variety of decorative front options, allowing homeowners to customize the overall look to fit their interior design. Whether you're aiming for a contemporary or more classic style, the HVFL18 can complement your home beautifully.

A key technology integrated into the HVFL18 is its advanced burner system. The system is designed to produce taller, flickering flames, enhancing the ambiance of a cozy fire. Along with this, the unit incorporates a built-in oxygen depletion sensor, which automatically shuts off the fireplace if oxygen levels in the room fall below a safe threshold, ensuring peace of mind for users.

Ease of use is another significant characteristic of the HVFL18. The fireplace features an intuitive electronic ignition system, which simplifies the process of starting the unit and allows for quick adjustments to the flame height. Homeowners will appreciate how easily they can obtain instant warmth with just the press of a button.

Furthermore, the Monessen Hearth HVFL18 is designed for easy installation. With no need for venting, it can be added to a variety of spaces in homes where traditional fireplaces might be impractical. The compact size makes it suitable for smaller rooms, while still delivering robust heating performance.

In conclusion, the Monessen Hearth HVFL18 combines exceptional heating power, aesthetic versatility, and state-of-the-art technology, making it a top choice for those seeking a stylish and efficient fireplace solution. Its blend of safety features, user-friendly operation, and attractive design ensures that it will enhance any home while providing warmth and comfort during colder months.