5-6.3 Repairs; Removing An Hfc-227Ea Cylinder; 5-7.1 Single Cylinder System - Kidde Fire Systems ECS Manual

5-6.3 Repairs
Replace all damaged parts found during inspection. Replacement procedures for HFC-227ea
cylinders are provided below. Since replacement for other system components are similar,
refer to the installation drawings and HFC-227ea system assembly drawings for guidance.
HFC-227ea cylinders must be recharged when the cylinder pressure gauge indicates the
pressure is below normal (360 PSIG at 70°F [25 bar gauge at 21°C]), immediately after
discharge, when a loss in weight is in excess of 5% of the original charged net weight or when
there is a loss of pressure (adjusted for temperature) of more than 10%.
5-7

REMOVING AN HFC-227ea CYLINDER

Remove an HFC-227ea cylinder as follows:
Do not disconnect the flexible discharge hose or valve outlet adapter prior to
removing pressure and electric control heads from the HFC-227ea cylinders.
Before replacing an HFC-227ea cylinder in a hazard area group, ensure that the
WARNING
pilot line is completely vented of all pressure.
5-7.1 Single Cylinder System
1. Remove the supervisory pressure switch (where installed) by disconnecting the electrical
connection at the switch, then remove the wire lead protection or conduit. Unscrew the
switch from the cylinder valve and install the protection cap on the switch connection port.
Install a protection cap on the nitrogen driver cylinder valve actuation port.
2. Disconnect the swivel nut on the control head from the cylinder valve actuation port, Re-
move the control head from the HFC-227ea cylinder.
3. Install a protection cap on the HFC-227ea cylinder valve actuation port.
4. Remove the valve outlet adapter or loosen the swivel nut and remove the flexible discharge
hose from the discharge outlet port adapter.
5. Immediately install a safety cap on the cylinder valve outlet port.
6. Remove the cylinder strap. Remove the HFC-227ea cylinder from the bracket. Weigh the
cylinder using a platform scale.
06-236115-001 5-13
Maintenance
October 2014