HTP MC120 - Manual (Page 7)

7
LP-171 Rev. 4.10.14
DO NOT USE THIS HEATER IF ANY PART HAS BEEN SUBMERGED IN WATER. Immediately call a qualified service technician.
The heater MUST BE replaced if it has been submerged. Attempting to operate a heater that has been submerged could create
numerous harmful conditions, such as a potential gas leakage causing a fire and/or explosion, or the release of mold, bacteria, or other
harmful particulates into the air. Operating a previously submerged heater could result in property damage, severe personal injury, or
death.
NOTE: Heater damage due to flood or submersion is considered an Act of God, and IS NOT covered under product warranty.
Be sure to disconnect electrical power before opening heater cabinet or performing service. Failure to do so could result in an electrical
shock that could result in property damage, serious personal injury, or death.
NOTE: If the heater is exposed to the following, do not operate until all corrective steps have been made by a qualified serviceman:
1. FIRE
2. DAMAGE
3. WATER
Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee.
Due to the low water content of the heater, improper sizing of the heater with regard to heating system load will result in excessive
cycling and accelerated component failure. HTP DOES NOT warrant failures caused by improperly sized heater applications. DO NOT
oversize the heater to the system. Modular heater installations greatly reduce the likelihood of heater oversizing.
B. IMPROPER COMBUSTION
Do not obstruct combustion and ventilating air flow. Adequate air must be provided for safe operation. Failure to keep the exhaust vent
and intake pipe clear of ice, snow, or other debris could result in property damage, serious personal injury, or death.
C. GAS
Should overheating or gas supply fail to shut off, do not turn off or disconnect electrical supply to circulator. Instead, shut off the gas
supply at a location external to the heater.
D. WHEN SERVICING THE HEATER

To avoid electric shock, disconnect electrical supply before
performing maintenance.

To avoid severe burns, allow heater to cool.
E. HEATER SYSTEM

Do not use petroleum-based cleaning or sealing compounds in a
heater system. Gaskets and seals in the system may be damaged.
This can result in substantial property damage.
 Do not use “homemade cures” or “patent medicines”. Substantial
property damage, damage to heater, and/or serious personal
injury may result.

Continual fresh make-up water will reduce heater 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 heater or piping must be repaired at once.

If you have an old system with cast iron radiators, thoroughly flush
the system (without heater connected) to remove sediment. The
high-efficiency heat exchanger can be damaged by build-up or corrosion due to sediment.

When the heater is used to supply potable water, do not connect it to any heating system or component(s) previously used
with a non-potable water-heating heater.
NOTE: Damages resulting from incorrect installation or from use of products not approved by HTP, Inc. ARE NOT covered by warranty.
F. WATER CHEMISTRY*

Sodium less than 20mGL.