MS4PMUHVT Multi-Stage Electronic Temperature Control with ...

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L1 Note: All circuits must have a common disconnect and be connected to the same pole of the disconnect. Internal to Relay Pack L2 Control Relay 1 Control Relay 2 Control Relay 3 Control Relay 4 240 120 NO1 CM1 NC1 NO2 CM2 NC2 NO3 CM3 NC3 NO4 CM4 NC4 Load 1 Load 2 Load 3 Load 4 Figure 11: Typical 240 VAC Relay Pack Wiring Connections 120 VAC Note: All circuits must have a common disconnect and be connected to the same pole of the disconnect. Neutral Internal to Relay Pack Control Relay 1 Control Relay 2 Control Relay 3 Control Relay 4 240 120 NO1 CM1 NC1 NO2 CM2 NC2 NO3 CM3 NC3 NO4 CM4 NC4 Load 1 Load 2 Load 3 Load 4 Figure 12: Typical 120 VAC Relay Pack Wiring Connections 6 MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin
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 Stage 1 Interstage Time Delay Off Temperature On Off Stage 1 On Stage 2 Off Differential Setpoint Interstage Time Delay On Stage 3 Off Differential 2 Interstage Time Delay Setpoint 2 (Offset from Setpoint) Stage 4 Off Differential 3 Differential 4 Setpoint 4 (Offset from Setpoint) Setpoint 3 (Offset from Setpoint) Figure 13: Direct Mode (Cooling) Differential On Interstage Time Delay Setpoint Off Stage 2 Setpoint 2 (Offset from Setpoint) Setpoint 3 (Offset from Setpoint) Differential 2 On Interstage Time Delay Off Stage 3 Differential 3 Off Stage 4 On Interstage Time Delay Time Setpoint 4 (Offset from Setpoint) Differential 4 Time Figure 14: Reverse Mode (Heating) MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin 7
Page 1 and 2: Product/Technical MS4PMUHVT Issue D
Page 3 and 4: Binary Input Response Binary Input
Page 5: Wiring ! WARNING: Risk of Electric
Page 9 and 10: Independent Setpoint Mode Independe
Page 11 and 12: Control Functions Temperature Manag
Page 13 and 14: Temperature Reset The control modul
Page 15 and 16: Alarm and Fault Display Codes These

MS4PMUHVT Multi-Stage Electronic Temperature Control with ...

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