Design and Installation
October 2014
4-34
06-236115-001
4-3.16
Installation of Nitrogen Cylinder, P/N WK-877940-000 and Mounting
Bracket, P/N WK-877845-000
1. Locate the nitrogen cylinder mounting bracket in an area where the cylinder valve assembly
and control head will be protected from inclement weather by a suitable total or partial en-
closure, preferably adjacent to the HFC-227ea storage cylinders.
2. Install the mounting bracket clamps and hardware. Install the nitrogen cylinder in position
in a mounting bracket; tighten sufficiently to hold the cylinder in place while allowing the
cylinder enough free play to be rotated.
3. Turn the cylinder until the cylinder valve discharge outlet is in the desired position. The ni-
trogen cylinder must be positioned so that control head is readily accessible during manual
operation.
4. Securely tighten the mounting bracket clamps and hardware.
5. Attach the adapter (P/N WK-699205-010) and connect the nitrogen pilot lines.
6. Remove the protective cap from the cylinder valve actuation port.
7. Install the control head to the cylinder valve actuation port and tighten securely.
4-3.17
Installation of Pressure Switch, P/N 81-486536-000 and
P/N 81-981332-000
Pressure switches must be connected to the discharge manifold or piping in an upright position
as shown on the system drawings. Both the standard and explosion-proof switches have 1/2-
inch NPT pressure inlets to connect to the system piping. The electrical connections are either
1/2-inch conduit knockouts for the standard pressure switch and 1-inch NPT fittings for the
explosion-proof pressure switch.
WARNING
Ensure the control head is in the SET position (that is, the actuating pin is in the
fully retracted or SET position) before attaching it to the cylinder valve. If the
control head is not in the SET position, HFC-227ea will discharge accidentally.
WARNING
To prevent personal injury, de-energize all electrical components before
installing the pressure switch.
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