FORM NO.:6U6K-B01E-NB-EN
JOHNSON CONTROLS
42
Field Wirings
Notes
1. The total length of the communication cable L=
L1+L2+L3...+Ln. The communication cable should be shielded
twisted in pairs. Refer to the table above for cable requirement.
2.Every control board is assigned one ID address. If a single
module includes two control boards, then two ID addresses
have to be assigned in the module. The modules above 130
kW have two control boards in the panel. If the ID address of
main board is assigned as number "n", then the auxiliary board
should be assigned as number "n+1".
3.The maximum quantity of modules above 130 kW comb-
ined should be 16. The quantity of modules in the same
Notes
1. External interlock is short-circuited or is linked to external
facilities before operation;
2. Water pump control is connected by factory before delivery
if hydro kit is selected;
3. 45-130 models: SF1 (DI12/XTB2:80K&93) -- Factory
installation; SF2 (DI5/XTB2:80E&85) -- Short-circuited before
delivery;
160-260 models: SF1 (DI12/XTB2:80K&93) -- Short-
circuited before delivery; SF2 (DI5/XTB2:80E&85) -- Factory
installation;
communication network is based on the sum total of control
boards in the network.
4.The maximum quantity of the control boards in the same
communication network should be 32, and different control
boards should use different ID addresses. If not, the control
board will be broken.
5.The control boards should not be energized while setting the
addresses, or the control board will be broken.
6.Another HMI (wire controller or Optiview LT) can be
connected to the communication port CON203 on control board
if the DIP switch SW302-8 is set to OFF.
FIGURE 24–
FIELD WIRINGS
The unit evaporator heater uses 230VAC. Disconne-
cting 230VAC power from the unit, at or below
freezing temperatures, can result in damage to the
evaporator and unit as a result of the chilled liquid
freezing.
It is possible that multiple sources of power can be
supplying the unit power panel. To prevent serious
injury or death, the technician should verify that NO
LETHAL VOLTAGES are present inside the panel
AFTER disconnecting power, PRIOR to working on
equipment.
SECTION 4 – INSTALLATION
4. For digital input signals (SF1/SF2, SC/H, SRE, SEL), the
loop resistance should be less than 100Ω when the external
contact closes. The voltage at both ends of DI switch is 12VDC
when DI switch/signal opens;
5. For output signals, the output from the control board is active
signal with 230VAC, and the accepted Amps capacity is 1A;
For pump/alarm output, a relay (KWP/KAL) has been
connected to the output port on control board before delivery to
transfer active signal to free contact, and the contact capacity is
1A @250VAC.
6. For additional information, please see wiring diagram.
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz
