HTP 850 LPHL - Manual (Page 8)

8
LP- 205 REV. 3.28.14
F. BOILER WATER

Do not use petroleum-based cleaning or sealing compounds in a boiler system. These products may damage gaskets and
seals in the system. This can result in substantial property damage.
 Do not use “homemade cures” or “boiler patent medicines”. Substantial property damage, damage to boiler, and/or serious
personal injury may result.

Continual fresh make-up water will reduce boiler life. Mineral buildup reduces heat transfer, overheats the stainless steel heat
exchanger, and causes failure. Addition of oxygen by make-up water can cause internal corrosion in system components.
Leaks in the boiler or piping must be repaired at once.

If you have an old system with cast iron radiators, thoroughly flush the system (without boiler connected) to remove sediment.
The high-efficiency heat exchanger can be damaged by build-up or corrosion due to sediment.
G. FREEZE PROTECTION
NEVER use any toxic chemical, including automotive, standard glycol antifreeze, or ethylene glycol made for hydronic (non-potable)
systems. These chemicals can attack gaskets and seals in water boilers, are poisonous if consumed, and can cause injury or death.
Consider piping and installation when determining boiler location.
NOTE: Damages resulting from incorrect installation or from use of products not approved by HTP, Inc. ARE NOT covered by warranty.
PART 2 – BEFORE YOU START
A . WHAT’S IN THE BOX
Also included with the boiler:

Pressure and Temperature Gauge

Outdoor Sensor

Intake PVC Tee with Screens

Exhaust PVC Coupling with Screens

Installation Manual

Warranty

CSD-1 Form

H-3 Data Sheet
B. HOW BOILER OPERATES
Mod Con condensing technology intelligently delivers highly efficient hydronic heating while maximizing efficiency by measuring data
from the heating system. Outlined below are the features of the system and how they operate:
Stainless Steel Heat Exchanger - The highly efficient stainless steel heat exchanger is designed to use the cold return water from the
system and extract the last bit of heat before it is exhausted.
Modulating Combustion System - The combustion system will modulate the output of the burner during operation to match the
system demand and achieve the control set point while in operation. The set point can change by internal or external signals which
enhance the overall performance of the system.
Control
– The integrated control system monitors the system and regulates fan speed to control boiler output. This allows the boiler to
deliver only the amount of heat energy required and nothing more. The system can be further enhanced by installing with an indirect
water heater to provide domestic hot water.
The control can regulate the output of multiple boilers through its cascade system function. The cascade system is capable of
connecting up to eight boilers together in such a way that they function as one boiler system. This allows for greater turn down ratios
and provides systematic control of the multiple boilers in an installation to minimize downtime and maximize efficiency.
The cascade system works by establishing one boiler as the master and the other connected boilers as followers. The master boiler
requires a cascade system sensor and a cascade pump in addition to its own boiler pump. Each of the follower boilers has an individual
pump.
System Display and Operational LED Light Indicators
– The display allows the user to change the system parameters and monitor
system outputs.