Precision Control Systems LineIR 5194 - Manual (Page 18)

106687-001 Rev. 2 6-4
6.2 Quartz Window Cleaning and Replacement: The optional quartz window can
be replaced or removed from the Model 5194 for periodic cleaning. Use the following
procedure to remove/reinstall/clean the quartz window:
1. Remove the two end-cover screws and the end cover from one end of the heater.
2. Gently slide the quartz window out of the grooves within the heater reflector.
Take care so that the quartz window does not bind and subsequently chip or crack
as it is removed.
3. If cleaning the window, use isopropyl alcohol and a clean, dry, lint-free cloth.
After cleaning, do not touch the inside surface of the window unless wearing
cotton gloves.
4. Reinsert the edges of the window into the grooves machined into both sides of the
reflector body.
5. Gently push the window into the reflector until it is completely seated against the
end cover mounted to the heater.
6. Reinstall the other end cover and secure with the two end cover screws.
6.3
Cleaning the Reflector: A clean reflector provides the greatest radiant efficiency.
If the reflector surface becomes contaminated, it reflects less energy. The energy that is
not reflected is absorbed by the reflector, and removed by the cooling water and air. This
energy is lost energy.
The following procedure should be used to clean the Model 5194 reflector:
1. Remove the lamp as described in Section 6.1 – Lamp
Removal/Replacement/Installation.
2. Clean the reflector with a mixture of warm water and common household
ammonia followed by a thorough wipe-down using a clean, water-dampened
flannel cloth.
3. Depending on the type of contamination present on the reflector, a suitable
solvent may be required to remove the contamination. The solvent must be
selected based on its inability to adversely affect the aluminum reflector.
4. Thoroughly wipe the reflector using the warm water/household ammonia mixture
followed by the dampened flannel cloth.
5. Replace the lamps, quartz window (if so desired), and the heater end covers as
outlined in Section 6.1 – Lamp Removal/Replacement/Installation.