Johnson Controls MS4PMUHVT, Быстрый старт

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MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin 7
Modes of Operation
The MS4PMUHVT control performs temperature
management for multi-stage applications. It can
automatically adjust the setpoint to save energy,
based on readings from the auxiliary temperature
sensor and the function settings.
The illustrations on the following pages show the
modes of operation available on the MS4PMUHVT
control.
Direct Mode (Cooling) and Reverse Mode (Heating)
Direct mode is used for cooling applications. (See
Figure 13.) Reverse mode is used for heating
applications. (See Figure 14.) Where desirable, stages
may overlap or have space between them.
Setpoint is the desired temperature.
In Direct Mode (cooling applications), when Setpoint is
reached on a temperature drop, the Normally Open
(N.O.) relay contacts open, ending the On cycle of
Stage 1.
In Reverse Mode (heating applications), when Setpoint
is reached on a temperature rise the N.O. relay
contacts open, ending the On cycle of Stage 1.
Differential is the operational range of Stage 1.
Setpoint 2 is the offset from Setpoint that activates
Stage 2.
Differential 2 is the operational range of Stage 2.
Setpoint 3 is the offset from Setpoint that activates
Stage 3.
Differential 3 is the operational range of Stage 3.
Setpoint 4 is the offset from Setpoint that activates
Stage 4.
Interstage Time Delay is the minimum amount of time
between two successive stages when multiple stages
are called for in rapid sequence.
Temperature
On
On
On
Off
Off
Off
Off
Setpoint
Setpoint 2
(Offset from
Setpoint)
Setpoint 3
(Offset from
Setpoint)
Setpoint 4
(Offset from
Setpoint)
Time
Differential
Stage
1
Stage
2
Stage
3
Stage
4
Interstage
Time
Delay
Interstage
Time
Delay
Interstage
Time
Delay
Differential 2
Differential 3
Differential 4
Figure 13: Direct Mode (Cooling)
Time
Temperature
On
On
On
On
Off
Off
Off
Off
Setpoint 2
(Offset from
Setpoint)
Setpoint 3
(Offset from
Setpoint)
Setpoint 4
(Offset from
Setpoint)
Stage
1
Stage
2
Stage
3
Stage
4
Interstage
Time
Delay
Interstage
Time
Delay
Interstage
Time
Delay
Differential 2
Differential 3
Differential 4
Differential
Setpoint
Figure 14: Reverse Mode (Heating)