HTP 850 LPHL - Manual (Page 9)

9
LP- 205 REV. 3.28.14
Gas Valve – Senses suction from the blower, allowing gas to flow only if powered and combustion air is flowing.
All Metal Integrated Venturi
– Controls air and gas flow into the burner.
Burner
– Constructed of high grade stainless steel, the burner uses premixed air and gas fuel to provide a wide range of firing rates.
Spark Ignition
– The burner is ignited by applying high voltage through the system spark electrode. This causes the spark from the
electrode to ignite mixed gas from the burner.
Supply Water Temperature Sensor
– This sensor monitors the boiler outlet water temperature (System Supply). The control adjusts
the boiler firing rate so the supply temperature will match the boiler set point.
Return Water Temperature Sensor
– This sensor monitors the boiler return water temperature (System Return).
Temperature and Pressure Gauge
– Allows the user to monitor system temperature and pressure.
Electrical field connections with terminal strips
– The electrical cover allows easy access to the line voltage and low voltage
terminals strips which are clearly marked to facilitate wiring of the boiler.
Condensation Collection System
– This boiler is a high efficiency appliance, therefore the boiler will produce condensate. The
collection system has a float switch which monitors the condensation level and prevents condensation from backing up into the
combustion system. Inside the collection system there is a built in trap which seals the combustion system from the connected drain.
This condensate should be neutralized to avoid damage to the drainage system or piping.
Flow Protection
– The optional flow switch is designed to protect the boiler in the event of low flow conditions. The boiler control will
also monitor flow through the heat exchanger by monitoring the return and supply sensors and will shut down the burner before
overheating occurs.
Outdoor Sensor
– This sensor monitors outdoor temperature. Data from this sensor is monitored by the control, which adjusts the unit
set point to provide greater efficiency.
Indirect Tank Sensor (optional)
– Monitors storage tank temperature.
C. OPTIONAL EQUIPMENT
Below is a list of optional equipment available from HTP. These additional options may be purchased through your HTP distributor.

System Sensor (Part # 7250P-324)

Indirect Tank Sensor (Part # 7250P-325)
 4” Stainless Steel Outside Termination Vent Kit (V2000)
 6” Stainless Steel Outside Termination Vent Kit (V3000)

High and Low Gas Pressure Switch Kit with Manual Reset (Part # 7350P-600)

U.L. 353 Compliant Low Water Cut-Off Interface Kit with Manual Reset (Part # 7350P-601)

Alarm System (Part # 7350P-602) (to monitor any failure)

Stacking Kit (Part # 7350P-603)

PC Connection Kit (Part # 7250P-320)

Condensate Neutralizer (Part # 7350P-611)

Caster Kit (Part # 7350P-604)

Flow Switch Kit (Part # 7350P-606 for Mod Con 300, Part # 7350P-605 for Mod Con 500/850)
PART 3 – PREPARE BOILER LOCATION
Carefully consider installation when determining boiler location. Please read the entire manual before attempting installation. Failure to
properly take factors such as boiler venting, piping, condensate removal, and wiring into account before installation could result in
wasted time, money, and possible property damage and personal injury.
A. BEFORE LOCATING THE BOILER
Incorrect ambient conditions can lead to damage to the heating system and put safe operation at risk. Ensure that the boiler installation
location adheres to the information included in this manual. Failure to do so could result in property damage, serious personal injury, or
death.