HTP HPW-50-6 - Manual (Page 18)

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LP-374 REV. 3.25.14
C. VACATION AND EXTENDED SHUTDOWN
If the water heater is to remain idle for an extended period of time, the power and water to the water heater should be turned off to
conserve energy and prevent a buildup of dangerous hydrogen gas.
The water heater and piping should be drained if they might be subjected to freezing temperatures.
After a long shutdown period, the water heater operation and controls should be checked by qualified service personnel. Make certain
the water heater is completely refilled before placing it in operation.
Hydrogen gas can be produced in a hot water system that has not been used for a long period of time (generally two weeks or more).
HYDROGEN GAS IS EXTREMELY FLAMMABLE! To dissipate such gas and reduce the risk of injury or death, it is recommended that
the kitchen sink hot water faucet be opened for several minutes before using any electrical water heater connected to the hot water
system. If hydrogen is present, there will be an unusual sound, such as air escaping through the pipe as water begins to flow. Do not
smoke or use an open flame near the faucet while it is open.
D. CLEANING THE FILTER
In Auto and Economy modes, the water heater moves air through the system and out of the back of the unit. The filter is in place to
protect the evaporator from dirt or dust.
A clean air filter is important to achieve highest efficiency. This filter will need to be cleaned at least once a year. When the filter
requires cleaning, an alarm will sound. The screen will display instructions that the filter needs to be cleaned.
NOTE: If the filter gets too dirty for heat pump to operate properly, the unit
will automatically switch to Electric Mode and energy savings will be lost.
Leave the power on and remove the filter from the top of the water heater.
Grasp the handle and slide the filter straight up until it clears the cover.
Once the filter has been removed, wipe it clean with a damp rag, or rinse it
in warm water.
Once the filter has been cleaned, it can be replaced by aligning it into the
slot in the top of the water heater and sliding it down into place. When the
handle is flush with the top of the cover, it is seated.
When the clean filter has been reinstalled, press ENTER.
IMPORTANT: The filter must be cleaned when the alarm is sounded. A
dirty filter will make the system work harder and result in a reduction of
efficiency and possible damage to the system. In order to get the best
energy efficiency available, make sure your filter is clean.
E. CLEARING THE CONDENSATION DRAIN TUBES
There are two drain hoses that are attached to the back of the water heater.
If both of these clog, water will spill down the outside of the unit.
The primary drain is intended to carry all condensate away. If it is clogged or the hose is kinked, the condensate will exit the secondary
drain tube and onto the floor. This is intended as a notification to the user that the primary drain is clogged. Remove the drain hose,
clear any debris, and reattach.
Periodically inspect the drain lines and clear any debris that may have collected in the lines.
PART 5 – INSTALLATION CHECKLIST
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1. Tank Location:
Is room size less than 10’ x 10’ x 7’ (700 cu. Ft.)? If yes, louvered door or similar ventilation is needed.
Is the rear of unit 7” away from wall?
Is the front of unit clear of any obstructions?
Is the water heater level? If not, add shims under the base of the unit.
Is a catch pan installed to prevent damage to surrounding area in case water heater leaks?
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2. Plumbing connections:
Do plumbing connections allow air filter removal?
Figure 16 – Filter Detail