#042793 Manual
8
Version 1.1
6. Be sure the gas valve at the tank is “On” and there is gas in the tank.
7. Be sure that the water flow is at least 1.5 l/minute.
8. If you have changed the gas bottle, it takes a while until the gas lines are filled with gas and
the gas reaches the water heater. If E1 is displayed, there is no flame detection. Close the
water tap for a few seconds and open it again. Depending on the length of the gas line, it may
take several attempts until you have ignition.When you have flame ignition, you will see the
current water temperature rising in the display.
Maintenance
Routine Maintenance
All tap aerators and showerheads should be cleaned regularly.
It is recommended that the IWH-1.5-13.5 be inspected by a qualified service technician at least once a
year. Particular attention should be paid to the following:
1. Be sure that the air inlet openings and flue area (screen) are clear of any debris or
obstructions, (leaves, bug nests, spider webs, etc.)
2. Check that heater mounting is still secure to the RV and that there are no areas for
potential water leaks.
3. Open the cover of the heater and inspect for debris or obstructions under the burner,
around the blower motor or in flue hood.
4. Visually inspect wiring. Be sure there is no chafing of the insulation. Be sure that the direct
spark ignition, the ground and the flame detection cable is secured to the electrodes at the left
side of the burner.
5. Inspect the interior surface of the housing for any cracks or corroded areas that could allow
penetration of gases into or out of the interior of the vehicle. Check especially around the Hot
Water, Cold Water, Gas and electrical connections.
6. Check for soot around the flue. Soot is a sign of incomplete combustion and a qualified service
technician should be notified to correct the problem.
7. Check the pressure relief valve if it’s tight under normal conditions. Test also the operation of
the drain valve for proper function.
Note: DO NOT open the drain valve during the operation of the water heater.
8. Turn on the power to the water heater and open a hot water tap to inspect the flame of the
burner. The flame should be of normal bluish appearance that indicates proper combustion.
You can observe the flame through a line of small holes at the front side of the burner.
9. Depending on the environmental conditions, the exhaust pipe might get a matt surface out of
aluminum oxide. This is normal and a kind of protection surface.
Winterizing and draining water
It is not recommended that you operate the water heater at below zero temperatures. Any freezing of
the water heater or other plumbing components can cause severe damage that is not covered by
warranty.
NOTE: Under no circumstances, however, should you travel under freezing conditions without first
draining water from the unit.
To drain the system:
1. Turn off water pump and the power and gas to the heater. Open the drain valve by
turning the handle to a 90° position from the normal position.
2. Open drain valve that was installed at hot water outlet fitting of heater.
3. Open at least one hot and cold water tap in the coach. This should drain the system.
Before storing the system for the winter season, the plumbing system must be winterized.
This can be done by either of the following methods:
All water should be drained from the system. To do this, open one tap at a time, using compressed air
(less than 2 bar) to purge the system of all water.
Recommendations of your RV manufacturer should be followed. Since the IWH-1.5-13.5 has no
storage tank, there is no need for a water heater bypass kit. It holds less than 0.3L of water.