54
6. Perform leakage test on gas valves. (See Fig. 46.)
7. Inspect and clean burner using shop air.
As Required
1. Recondition or replace low water cut-off device (if
equipped).
2. Check sediment trap and gas strainers.
3. Check flame failure detection system. (See “Post
Start-Up Check,” page 46.)
4. Check igniter. (Resistance reading should be 40-
75 ohms at 77
°
F).
5. Check flame signal strength. (Flame signal should
be greater than 1
microampere
as measured at
the 2 pins on the bottom of the PIM™).
6. Check firing rate control by checking the manifold
pressure. (See “Manifold Check” on page 46.)
7. Test safety/safety relief valves in accordance with
ASME Heater and Pressure Vessel Code
Section IV.
Filter Maintenance
• Inspect quarterly
• Replace when tracking pressure exceeds -0.5 in.
WC at 100% fan speed, except for models 1003A,
1753A and 2003A, which need to be replaced
when tracking pressure exceeds -0.7 in. WC at
100% fan speed.
Filter Replacement
1. Remove the filter box cover by loosening and
removing the two wing nuts holding it in place.
2. Remove the filter by lifting it straight up and out of
the slot in the filter box.
3. Reverse steps 1 and 2 to install the new filter. Use
Raypak replacement filters, kit number 012553F
(12”X12”) for models 503A-1003A and kit number
012552F (16”X16”) for models 1253A-2003A.
Fig. 47: Remove the Air Filter Box Cover
Fig. 48: Remove the Air Filter
NOTE:
Use Raypak replacement filters, kit number
012553F (12”X12”) for models 503A-1003A and kit
number 012552F (16”X16”) for models 1253A-
2003A.
Содержание 503A
Страница 43: ...43 WIRING DIAGRAM Models 503A 2003A...
Страница 59: ...59...
Страница 60: ...60 www raypak com Raypak Inc 2151 Eastman Avenue Oxnard CA 93030 805 278 5300 Fax 805 278 5468 Litho in U S A...
