AUTOFLAME Mini Mk8 M.M., Installation And Commissioning Manual

Page: 90 / 125

90
3.9.2 External Modulation
外部控制
For external modulation, option 45 must be set to 1 Enabled, and option 9 must be set to 0. The
internal PID control is disabled and the firing rate is set by input control signal on terminal 37, 38 as
appropriate for 0 – 10V and 2 – 10V. Set parameters 68 for the external modulation control range,
and parameter 69 for the input range. The fuel flow metering must be commissioned through
option.
要使用外部控制， 选项
45
的数值必须是
1(
启用
)
并且选项
9
的值必须是
0
。 这时内部
PID
控制被关闭，
燃烧率由终端
37
，
38
上输入的
0 – 10V
和
2 – 10V
控制信号来设定。选项
68
设定外部调节控制范围，
选项
69
设定外部控制的输入信号范围。操作者使用外部控制必须要通过选项来调试燃料计量表。
Note: 4-20mA external modulation can be used via a 500 ohm resistor across terminals 37 and 38.
注意：系统可以通过一个跨接终端
37, 38
的
500
欧姆电阻来使用外部控制的
4 - 20mA
电流输入。
3.9.3 Additional Functions
额外功能
Options/ parameters 154, 155 and 156 have been added to set the function of terminals 80, 81 and
82, respectively. Terminal 80 is used for start position interlock, night setback input, and reduced
setpoint input. Terminal 81 is used for purge interlock and low flame hold input. Terminal 82 is used
for warming stat and valve proving mains input. Proving valves (end switch) provide a secondary
confirmation that a valve has reached a predefined position.
选项
/
参数
154
，
155
和
156
分别设置终端
80
，
81
和
82
的功能。终端
80
用于“启动位置连锁”，“夜
间调低值输入”和“降低设定点值输入”。终端
81
用于“吹扫连锁”和“低火焰输入”。终端
82
用于“加温控制点”和“阀门校验干线输入”。校验阀门（终端开关）的作用是二次确认阀
门是否达到预定位置。
To install the End Limit Switches,
安装终端限位开关的方法，
1. Mount the servomotor onto the valve and ensure the potentiometer reads the correct position
on the M.M. for the “CLOSED” and “OPEN” valve positions.
将伺服马达安装到阀门上，确保屏幕上的电位计读数能正确反映阀门的“关闭”和“开启”
位置。
2. Mount the End Switch Proving Unit (E.S.P.U.). The servomotor may have to be moved to a
suitable position in order to allow the E.S.P.U. to be attached to the valve.
安装终端开关校验设备
(E.S.P.U.)
。为了将终端开关校验设备装到阀门上，伺服马达可能要打
开到一个合适位置。
3. Undo the End Limit Switch holding screws.
解开终端限位开关的紧固螺丝。
4. Adjust the position of CAM corresponding to switches 1 (S1) and 2 (S2) by loosening the CAM
screws and move to the required position.
松开凸轮螺丝并且调节到位，根据开关
1 (S1)
和开关
2 (S2)
调节凸轮位置。
5. Wire the ESPU according to the Valve Proving the End Limit Switch will be required to provide.
See the End Limit Switch wiring diagram in Figure 3.9.3.i
根据阀门校验需要来接入终端开关校对设备
(E.S.P.U.)
。参见图示
3.9.3.i
中的终端限位开关接
线图。
Note: The use of these switches is determined by the application approval necessary. These are not
required to meet UL, FM or CE.
注意：开关的使用取决于实际的申请批复情况。这些开关不必符合
UL, FM
或者
CE
标准。