P70, P72, and P170 Series Controls for Dual Pressure ...

1 P70, P72, and P170 Series Controls for dual Pressure applications Part No. 24-8607-0, Rev. H. installation instructions Issued March 2016. Refer to the QuickLIT Web site for the most up-to-date version of this document. applications P72 models have a Double-Pole Single-Throw (DPST). switch with load-carrying contacts that can provide The P70, P72, and P170 Controls for dual Pressure direct control of 208/240 VAC, single-phase motors up applications provide combined high and low Pressure to 3 hp, 480, and 600 VAC single-phase control of compressors on commercial refrigeration and non-compressor motors and 208/220 VAC, 3-phase air conditioning applications . motors up to 5 hp. See Table 3. IMPORTANT: Except for those models listed as These Controls are available in several Pressure refrigeration temperature limiting Controls , use this ranges and are compatible with most common P70, P72, and P170 Series Controls for dual refrigerants. Ammonia-compatible models are also Pressure applications only as an operating control.

2 Available (P70L and P70M only). See Table 2. Where failure or malfunction of the P70, P72, or P170 Pressure Control could lead to personal injury The MICRO-SET option provides fine adjustment of or property damage to the controlled equipment or the differential setting for precision Pressure control of other property, additional precautions must be low Pressure applications . designed into the control system. Incorporate and Some models feature Limited Knob Adjustment, which maintain other devices, such as supervisory or restricts adjustment of the Pressure settings and deters alarm systems or safety or limit Controls , intended to over-adjustment or tampering. See Low Pressure warn of or protect against failure or malfunction of Limited Knob Adjustment. the P70, P72, or P170 Pressure Control. A Manual Reset Lockout option does not allow the P70S and P170S models have independently operated Pressure control to reset automatically after CUT OUT.

3 High and low Pressure Single-Pole Double-Throw is reached, and provides shutdown capability for (SPDT) switches that can be wired to satisfy a variety unmonitored equipment. See Manual Reset Operation. of control requirements. These adaptable Controls have NEMA 1 enclosures are standard on most models. a high Pressure manual reset lockout mechanism that NEMA 3R enclosures are also available. is convertible to automatic reset. See Table 1. Table 1 through Table 2 list the standard models and P70L, M, N, and P170L, M, N models have a Single- features of P70, P72, and P170 Controls for dual Pole Single-Throw (SPST) switch. Models are Pressure applications . These standard models are available with automatic or manual reset lockout available through most authorized options. Models with manual reset are available with Johnson Controls /PENN distributors. either high-side-only manual reset, or low-side and high-side manual reset. (See Table 1 and Table 3.)

4 Ammonia compatible models are available (P70L and P70M only). See Table 2. P70, P72, and P170 Series Controls for dual Pressure applications installation 1. instructions Table 1: Standard Model P70, P72, and P170 MICRO-SET dual Pressure Controls for Non-Corrosive Refrigerants Model Code Switch Low Pressure Side High Pressure Side Pressure Limited Number Action psig (kPa) psig (kPa) Connector Knob Range Differential Range Differential Adjustment (Non- Adjustable). P70LB-61 SPST 12 in. Hg to Min 5 (34) 100 to 500 Fixed 36 in. Capillary Low CUT OUT. 80 psig Max 35 (241) (690 to 3,447) Approximately with 1/4 in. (-41 to 552) 65 (448) Flare Nut P70MA-181 Lockout None Requires Manual Reset P70SA-11 Two Fixed at Independent 65 (448) or SPDT Lockout Requires Manual Reset P170LB-61 SPST Fixed 1/4 in. Male Low CUT OUT. Approximately Flare 65 (448) Connector P170MA-181 Lockout None Requires Manual Reset P170SA-11 Two Fixed at Independent 65 (448) or SPDT Lockout Requires Manual Reset 1.

5 Control models with high Pressure side (only) that are UL Listed as Refrigeration Pressure Limiting Controls . Table 2: Standard Model P70, P72, and P170 All Range dual Pressure Controls for Ammonia Model Code Switch Low Pressure Side High Pressure Side Pressure Limited Number Action psig (kPa) psig (kPa) Connector Knob Range Differential Range Differential Adjustment (Non- Adjustable). P70LA-21 SPST 20 in. Hg to Min 7 (48) Max 100 to 500 Fixed 1/4 in. Female None 100 psig 50 (345) (690 to 3,447) Approximately NPT. (-68 to 690) 65 (448) Connector P70MA-21 Lockout Requires Manual Reset 1. Control models with high Pressure side (only) that are UL Listed as Refrigeration Pressure Limiting Controls . 2 P70, P72, and P170 Series Controls for dual Pressure applications installation instructions Table 3: Standard Model P70, P72, and P170 All Range dual Pressure Controls for Non-Corrosive Refrigerants Model Code Switch Low Pressure Side High Pressure Side Pressure Limited Number Action psig (kPa) psig (kPa) Connector Knob Range Differential Range Differential Adjustment (Non- Adjustable).

6 P70LB-11 SPST 20 in. Hg to Min 6 (41) 100 to 500 Fixed 36 in. Capillary Low CUT OUT. 100 psig Max 50 (345) (690 to 3,447) Approximately with 1/4 in. (-68 to 690) 65 (448) Flare Nut P70MA-11 Lockout None Requires P70NA-1 Fixed (Manual Manual Reset Reset). P72LA-11 DPST Min 7 (48) Fixed None Max 50 (345) Approximately 65 (448) Low CUT OUT. P72LB-11. P72MA-11 Lockout None Requires Fixed (Manual Manual Reset P72NA-11. Reset). P170LB-11 SPST Min 7 (48) Fixed 1/4 in. Male Low CUT OUT. Max 50 (345) Approximately Flare 65 (448) Connector P170MA-11 Lockout None Requires P170NA-1 Fixed (Manual Manual Reset Reset). 1. Control models with high Pressure side (only) that are UL Listed as Refrigeration Pressure Limiting Controls . installation Dimensions See Figure 1 and Figure 2 for dimensional information. P70, P72, and P170 Series Controls for dual Pressure applications installation instructions 3. Figure 1: Dimensions for P70, P72, and P170 dual Pressure Controls with NEMA 1 Enclosure, in.

7 (mm). Figure 2: Dimensions for P70, P72, and P170 dual Pressure Controls with NEMA 3R Enclosure, in. (mm). 4 P70, P72, and P170 Series Controls for dual Pressure applications installation instructions Mounting Use the two inner holes with the Universal Mounting Bracket (and screws supplied) when CAUTION: Risk of Property Damage. mounting the control to a flat horizontal Mount the Pressure control separately surface. See Figure 3. ! from the electrical cabinet and seal all electrical piping to prevent ammonia from migrating to electrical components. Where there may be exposure to ammonia, use only ammonia-compatible control modules and Pressure connections. System shutdown due to improper adjustment may cause property damage. Figure 3: Mounting dual Pressure Controls with NEMA 1 Enclosures CAUTION: Risk of Property Damage. Mount the P70, P72, or P170 Pressure ! Control according to the instructions and Mount Controls with NEMA 3R enclosures in a level, upright position with the bellows and conduit guidelines included with the control.

8 Connection facing down. Ensure that all gaskets These instructions and guidelines are are in place. Mounting Controls with NEMA 3R. intended to reduce the risk of malfunction enclosures in any position other than upright and of the product and resulting property level may trap water in the enclosure and damage. Failure to follow these submerge internal components. instructions and guidelines could cause the control to malfunction, resulting in Wiring property damage. WARNING: Risk of Electric Shock. Disconnect or isolate all power supplies IMPORTANT: Use only the mounting screws supplied with the Universal Mounting Bracket to ! before making electrical connections. More than one disconnect or isolation avoid damaging internal components. Be careful not may be required to completely to distort or bend the control case when mounting de-energize equipment. Contact with the control to an uneven surface. Using other components carrying hazardous voltage screws or bending the control case will void the can cause electric shock and may result warranty.

9 In severe personal injury or death. Observe the following guidelines when installing this device: IMPORTANT: Use copper conductors only. Make all wiring connections in accordance with local, Mount the control in an accessible position, where national, and regional regulations. Do not exceed the control and Pressure -connection lines are not the P70, P72, or P170 Pressure Control electrical subject to damage. ratings. Mount the Pressure control upright and level. IMPORTANT: Use terminal screws furnished in the Position the Pressure -connection lines to allow switch block. Using other terminal screws will void drainage away from control bellows. the warranty and may damage the switch. Locate Pressure -tap points on the topside of the refrigerant lines to reduce the possibility of oil, P70, P72, and P170 Controls for dual Pressure liquids, or sediment accumulating in the bellows, applications are available with several switch options which could cause control malfunction.

10 And electrical ratings. Check the label inside the control cover for model number, switch action, and electrical Mount Controls with NEMA 1 enclosures on rating. Check the wiring terminal designations on the horizontal or vertical flat surfaces. control switch block, and see the following guidelines Use two screws or bolts through the two outer and applicable wiring diagrams, when wiring the holes on the back of the control case when control. See Table 1 through Table 3 for switch actions mounting the control directly to a flat vertical and models. See Technical Specifications. surface. See Figure 3. P70, P72, and P170 Series Controls for dual Pressure applications installation instructions 5. Figure 4: Typical Wiring for SPST Switch (P70L, M, N, and P170L, M, N Models). Figure 6: Typical Wiring for DPST Switch (P72L, M, and N Models). Figure 5: Typical Wiring for 4-Wire, 2-Circuit Switch (P70P, Q and R Models). Figure 7: Two SPDT Switches Wired as a dual Pressure Control (P70S and P170S Models).