Ymaa, Ycae, And Ycwe-E Panel Installation; Figure 11 - Scroll Chiller Panel Installation - Johnson Controls York Smart Equipment SC-EQUIP Installation Instructions Manual

FORM 450.50-N1
ISSUE DATE: 08/19/2019
7. Connect the communications cable shielded
ground to the ground screw.
8. Set the desired BAS network address for the SC-
EQ using the SW-1 MAC Address Switches.
The Resister is used for BAS
RS485 2 Wire Connection.
Connect one end of the
Resistor to the COM of TB5
(24 VAC) and the other to
Port 1 COM.
Use this resistor only if the BAS
wiring utilizes a 2 Wire
communication trunk
Communication Wiring Harness:
Connect to Micro Board
TB1 as Follows:
Wire Color / Terminal
Red / +
Black / -

FIGURE 11 - SCROLL CHILLER PANEL INSTALLATION

YMAA, YCAE, AND YCWE-E PANEL
INSTALLATION
To install the panel on YMAA, YCAE, or YCWE-E
chillers, complete the following steps:
1. Install the SC-EQ to the bracket using plastic sup-
port. Attach the bracket to the studs provided in-
side the chiller enclosure. See Figure 12, Figure
13, or Figure 14.
2. Install the 12 VDC switch power supply to the
bracket using M3 screws. Attach the bracket to
the studs provided inside the chiller enclosure.
This step is only for YCAE and YCWE chillers.
See Figure 13 or Figure 14.
3. Connect the appropriate communications cable
based on the SC-EQ mounting location, from Port
J8 (RS-485) on the SC-EQ to CON205 on the
YMAA, YCAE, or YCWE control board. Ensure
that wires are correct. See Figure 15, Figure 16,
or Figure 17
JOHNSON CONTROLS
When the SC-EQ and the control panel are powered
up, the SC-EQ automatically sets itself to the BAS pro-
tocol, baud rate and chiller model. This may take up to
120 seconds.
Primary Power
Wiring Harness
Terminal block location
for YCAL-C, YCWL,
and YCUL-C.
TB2
TB5
Transformer
Secondary
Secondary
Ground
Power
Wiring
Harness Tie
Wrap
TB1 RS485
SHLD REF - +
Terminal Block Location
For YCAL-D, YCAL-E, and YLAA.
When the SC-EQ and the control board are powered
up, the SC-EQ automatically sets itself to the BAS pro-
tocol, baud rate, and chiller model. This may take up
to 120 s.
Expansion
Sheet
Expansion
Nut
Metal
Nut Screw
Screw
24 VAC
Transformer
TB5
Com
Ground
Resistor
TB1
Communication
Wiring Harness
MicroBoard
TB5
TB2
4. Check for stray wire strands, which could cause
short circuits. Ensure all components are secure.
5. Connect the BAS network to J12 (RS-485) on the
SC-EQ board.
6. Connect the appropriate length of power har-
ness from J9 on the SC-EQ to XTB2, as shown
in Figure 15, or to 12 VDC switch power supply,
as shown in Figure 16. The power harness is in-
cluded in the kit.
7. Set the required BAS network address for the SC-
EQ using the SW-1 MAC address switches.
SECTION 2 - INSTALLATION
SC-EQ
LD20005
17
2