Repair Guide - White Rodgers SST1600 Owner's Manual

TECHNICAL REPAIR GUIDE
Do not attempt repair of this unit unless you are
familiarwith the necessarytools, equipment, utility
connections and potential hazards.
Repair should be performed only by a qualified
service provider.
Failure to do so could result in reduced perfor-
mance of the unit, serious personal injuryor death.
This guide contains service checks to assist service
personnel in locating and correcting any malfunction that
might occur to render the air cleaner ineffective or inop-
erative. The air cleaner has been designed with replace-
able components, such as the high-voltage power supply
and airflow switch. This allows the serviceman to replace
a faulty component rather than attempt repairs of such
components in the field.
All voltage measurements indicated can be made with a
high voltage D.C. probe and a general purpose volt ohm
meter. For example: Simpson 260 or equivalent.
For test purposes, the air flow switch may be "wired out"
of the system. This will eliminate the need for air flow
across the sensing thermistor to energize the power
supply (see Fig 23).
NOTE: All tests to be performed with the Ozone Reduction
Jumper intact.
NOTE: When servicing the power pack components, all
wiring must be routed to factory specifications.
Power Pack
Assembly
©
Wht from L2 or Wht/Brn
(f'-_Operating
W ,ght
I ON,OFF
....
Wht __Power
I L < B,u
Supply
___4_ BV_/ht Or wht/Brn*
120 VAC
Cover Assembly Connector
L1 L2
o
om Air Flow <-/ W_/ht _
I (If Required)
I_ Airflow Switch
t
1_2
....... BIk
*Wht from L2 or Wht/Brn from Air Flow
Figure 22
Power Supply
Specifications
The solid-state power supply is not
designed for individual component part
replacement and must be replaced as
a complete "snap-in" unit,
Input voltage: 120 VAC 60 Hz.
Output to light: 1.5 to 2.5 VDC
H.V, Output: 6450 VDC (nom)
Collecting Cell
Specifications
1000 cfm -
1400 cfm -
1600 cfm -
2000 cfm -
1.0 Ma @ 6450VDC
1.2 Ma @ 6450 VDC
1.5 Ma @ 6450 VDC
1.7 Ma @ 6450 VDC
11