Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

Page: 34 / 414

[
II
Restrictions ]
- 25 - HWE09080 GB
8-step demand control (When SW4-4 is set to ON on two heat source units)
Demand capacity is shown below.
*1. The heat source units whose SW4-4 is set to ON are designated as No. 1and No. 2 in the order of address from small to
large.
Ex) When heat source units whose SW4-4 is set to ON are designated as OS1 and OS2, OS1=No. 1 and OS2=No. 2.
12-step demand control (When SW4-4 is set to ON on three heat source units)
Demand capacity is shown below.
*1. The heat source units whose SW4-4 is set to ON are designated as No. 1, No. 2, and No. 3 in the order of address from
small to large.
Ex) When heat source units whose SW4-4 is set to ON are designated as OC, OS1, and OS2, OC=No. 1, OS1=No. 2,
and OS2=No. 3.
8-step demand No.2 CN3D
1-2P Open Short-circuit
No.1 CN3D 1-2P 1-3P Open Short-circuit Open Short-circuit
Open Open 100% 50% 88% 75%
Short-circuit 50% 0% 38% 25%
Short-circuit Open 88% 38% 75% 63%
Short-circuit 75% 25% 63% 50%
12-step
demand No.2 CN3D 1-2P Open
1-3P Open Short-circuit
No.3 CN3D 1-2P Open Short-circuit Open Short-circuit
No.1
CN3D 1-2P 1-3P Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Open 100% 67% 92% 84% 67% 34% 59% 50%
Short-
circuit 67% 34% 59% 50% 34% 0% 25% 17%
Short-circuit Open 92% 59% 84% 75% 59% 25% 50% 42%
Short-
circuit 84% 50% 75% 67% 50% 17% 42% 34%
12-step
demand No.2 CN3D 1-2P Short-circuit
1-3P Open Short-circuit
No.3 CN3D 1-2P Open Short-circuit Open Short-circuit
No.1
CN3D 1-2P 1-3P Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Short-
circuit
Open Open 92% 59% 84% 75% 84% 50% 75% 67%
Short-
circuit 59% 25% 50% 42% 50% 17% 42% 34%
Short-circuit Open 84% 50% 75% 67% 75% 42% 67% 59%
Short-
circuit 75% 42% 67% 59% 67% 34% 59% 50%