Maintenance & Cleaning
The steam generator is designed to require minimum maintenance, but certain parts may need replacement after prolonged
use. After installation; no user adjustment should be necessary. If a service need arises, only authorized personnel should
perform the work.
WARNING:
USE ONLY GROEN SUPPLIED PARTS. SUBSTITUTION OF UNAUTHORIZED
PARTS OR GENERIC PARTS
CAN CAUSE BODILY INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT.
WARNING:
ELECTRIC POWER SHOULD ALWAYS BE SHUT OFF BEFORE ANY WORK IS DONE ON INTERNAL COM-
PONENTS.
A. PERIODIC INSPECTION
It is recommended that service personnel check the unit at least once a year. This periodic maintenance should include
inspecting electrical wires and connections, cleaning the inside of the control console, and possible adjustment of the pilot
light or ignition coil.
A Maintenance and Service Log is provided with the warranty information. Each time maintenance is performed on your
Groen equipment, enter the date on which the work was done, what was done, and who did it. File the log with the warranty.
In addition to this yearly inspection, the following items should be checked weekly to ensure minimum equipment downtime
and to help guarantee efficient operation:
1. The pressure gauge should be in working order.
2. Water level in the steam generator should be between the lines on the level gauge glass.
3. The strainers in the drain and feed lines should be cleared.
4. Check the burner gas jet primary air inlets. They should be free from dirt and lint
5. The pilot light flame should be blue and envelop approximately
1/
2
inch of the flame sensor tip (NGB only).
6. Check the drain for blockage. During operation there should be a continuous flow of water.
At least twice a month, check the safety valve to make sure that it works freely. When the gauge pressure is about 5 PSI, lift
the valve lever enough to vent steam, then quickly let it snap back into place.
WARNING:
DO NOT EXPOSE YOURSELF TO THE ESCAPING STEAM. A SEVERE BURN CAN RESULT
ON EXPOSED SKIN.
B. COMPONENT REPLACEMENT
The NGB and NGB/E steam generators are easy to service because of the accessibility of control components and simplicity
of design. An examination of the circuit diagram shows that. in most instances, a faulty component can be isolated with a
jumper wire.
Before replacing any part. COMPLETELY SHUT OFF THE GAS AND , ELECTRI
C
POWER SUPPLIES. Allow 5 minutes for
unburned gas to vent. When replacement involves breaking a gas pipe connection, check the new connection for leaks with a
thick soap solution or other appropriate leak detector. DO NOT USE A FLAME TO TEST FOR LEAKS.
All internal wiring is marked as shown on the circuit schematic drawing. Be sure new components are wired in the same
manner as the old components.
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