Installation
16 SO-SVN037A-EN
Install Power Supplies and
Hardware
Install 1A2 Power Supply—CH530 If Not
Already Present
Note: Proceed directly to the next stage of the installation
process:
• for CH531 applications, or
• If there are already two power supplies (1A1 and
1A2) in place from the previous CH530 control
system.
1. Find the factory-drilled mounting holes on the inner back
wall of the control panel enclosure to the right of the
existing power supply.
2. Attach the power supply to the mounting bracket with the
hardware provided.
3. Attach the power supply assembly to the back wall of the
enclosure using the 10-32 x 0.50-inch screws provided.
Note: In all subsequent manual pages, this new power
supply will be referred to as the 1A2 power supply,
while the preexisting power supply from the original
control system will be referred to as the 1A1 power
supply.
Install 1A2 Power Supply - CH531 Prebuilt
Panels
1. Locate and remove the vent line solenoid time delay relay
and base.
Note: Do not unwire the base. The wires should be long
enough to reach the new location. Use caution
when removing the timer because the center
alignment post is very fragile.
2. Locate and remove the 1A1 power supply LLID and
bracket.
Note: Do not unwire the 1A1 power supply LLID. The
wires should be long enough to reach the new
location.
3. Locate and remove the middle back panel securing screw
on the right side.
4. Install the new sub back panel provided with the kit.
a. Secure the left side of the bracket using two #10-32 by
1/2-inch screws and the holes emptied by the removal
of the power supply bracket.
b. Secure the right side of the bracket using one 10-32 x
1.00-inch screw and the hole emptied by the removal of
the back panel securing screw.
5. Using the screws that were removed in Step 2, attach the
existing power supply LLID onto the new panel in the holes
labeled 1A1.
6. Using the screws that were removed in Step 1, attach the
vent line solenoid time delay relay and base in the holes
labeled 1K20.
Important: The timer must be aligned correctly with the
base.
7. With the hardware provided, attach the new power supply
to the mounting bracket.
8. Using 10-32 x 0.50-inch screws provided, attach the power
supply assembly to the new panel in the holes labeled 1A2.
Note: In all subsequent manual pages, this new power
supply will be referred to as the 1A2 power supply,
while the preexisting power supply from the original
control system will be referred to as the 1A1 power
supply.
Figure 23. Installation of second power supply
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