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安装维修保护说明
71.06953.01 - CN
19. 换煤气模式
在获授权的技术服务人员调节下,该锅炉可以在天然气(G.20)和液化气(G.31)之间转换使用。
其操作顺序如下:
A) 更换主燃烧器的喷嘴和进气隔片(如果有的话);
B) 重新校准压力调节器的最大和最小压力。
A) 更换喷嘴
小心将主燃烧器从其座位上拆卸下来;
更换喷嘴时要安装固定到底部,以免泄漏煤气。 表2中显示了喷嘴的直径大小。
更换煤气阀上的煤气隔片(图 10)。隔片直径显示在表2中。
注意: 不必修改参数F02.
B) 压力调节器的校准
将压差计(最好是液体压差计)的正压接头接在气阀的压力接头(Pb)上(图10)。 只有针对带密封腔型号的锅炉时,
将压力计的负压接头连接到“T”,这样可以一起连接锅炉的补偿接头、气阀补偿接头(Pc)和压力计本身。 (还可以
将压力计连接到压力接头(Pb)进行测量,而不需要密封腔的前板);
如果没有按照说明测量燃烧箱的压力,其测得的压力值可能会出现错误,因为测量时没有考虑到密封腔内风机造成的负压。
B1) 额定功率的调节:
打开气阀,将锅炉设置为“冬季”状态;
根据第19.1章节中的说明,将锅炉开到最大功率;
取下调制器的盖子;
调节铜钉(a)直到压力显示符合表1的指示;
检查通过气阀(图10)压力接头(Pa)测量到的锅炉电源的动态压力是否正确(液化气37mbar或天然气20mbar)。
B2) 降低功耗的调节:
断开调制器的电源线,拧松钉子(b)直到压力值达到降低功耗的要求(见表1);
重新连接电源线;
装上调制器的盖子并拧紧。
B3) 最后检查
挂上指示牌,说明锅炉模式的更换,指出使用煤气的类型和校准值。
注意
煤气压力过低的情况下(低于17mbar),需拆除安装在气阀上的进气隔片(图10)并设置电路图参数F02=00(§21)。
图 10
气阀型号 SIGMA 845
b
a
0605_1502
煤气隔片
图 11
CG_2347 / 1104_0406
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