HTP EL-399NVWH - Manual (Page 9)

9
LP- 346 REV. 3.20.14
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 off of the burner.
Supply Water Temperature Sensor
– This sensor monitors the heater outlet water temperature (System Supply). The control adjusts
the heater firing rate so the supply temperature will match the heater set point.
Return Water Temperature Sensor
– This sensor monitors the heater return water temperature (System Return).
Flue Sensor
– Monitors flue temperature and adjusts firing rate.
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 heater.
Condensation Collection System
– This heater is a high efficiency appliance, therefore the heater 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 supplied flow switch is designed to protect the heater in the event of low flow conditions. The heater control will
also monitor flow through the heat exchanger by monitoring the return and supply sensor and will shut down the burner before
overheating occurs.
0-10 Volt Input
– Allows Installer to connect a BMS (Building Management System) to control the heater.
Condensate Flue Check System
– The check system prevents exhaust from the heat exchanger from backing up into cabinet.
Pump Service Mode
– Allows manual operation of pumps to commission system and check pump operation.
C. OPTIONAL EQUIPMENT
Below is a list of optional equipment available from HTP. These additional options may be purchased through your HTP distributor:

Wall Mount Bracket (Part # 7450P-211)

System Sensor (Part # 7250P-324)

Indirect Tank Sensor (Part # 7250P-325)
 2” PVC Concentric Vent Kit (Part # KGVAT0501CVT)

3" PVC Concentric Vent Kit (Part # KGAVT0601CVT)
 2” Stainless Steel Outside Termination Vent Kit (Part # V500)
 3” Stainless Steel Outside Termination Vent Kit (Part # V1000)
 4” Stainless Steel Outside Termination Vent Kit (Part # V2000)
 6” Stainless Steel Outside Termination Vent Kit (Part # V3000)
 3” Polypro Vent Kit (Part # 8400P-001)
 3” Polypro Pipe (33’ length Part # 8400P-002, 49.5’ length Part # 8400P-003)

U.L. 353 Compliant Low Water Cut-Off Interface Kit with Manual Reset (Part # 7450P-225)

Manual Reset High Limit (Part # 7450P-217)

Alarm System (Part # 7350P-602) (to monitor any failure)

PC Connection Kit (Part # 7250P-320)

Condensate Neutralizer (Part # 7450P-212 for EL-80/110/150/220/299/301, Part # 7350P-611 for EL-399)
NOTE: When using an optional system sensor, pipe insulation must be wrapped around it to improve temperature measurement
accuracy and increase overall system efficiency.
PART 3 – PREPARE HEATER LOCATION
Carefully consider installation when determining heater location. Please read the entire manual before attempting installation. Failure to
properly take factors such as heater venting, piping, condensate removal, and wiring into account before installation could result in
wasted time, money, and possible property damage and personal injury.